java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HierarchicalTraceAbstraction/GeometricalCake.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d19836b [2018-09-26 21:34:14,011 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-26 21:34:14,013 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-26 21:34:14,025 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-26 21:34:14,025 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-26 21:34:14,026 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-26 21:34:14,028 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-26 21:34:14,030 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-26 21:34:14,031 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-26 21:34:14,032 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-26 21:34:14,033 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-26 21:34:14,033 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-26 21:34:14,035 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-26 21:34:14,036 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-26 21:34:14,037 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-26 21:34:14,038 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-26 21:34:14,039 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-26 21:34:14,041 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-26 21:34:14,043 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-26 21:34:14,044 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-26 21:34:14,045 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-26 21:34:14,047 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-26 21:34:14,049 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-26 21:34:14,057 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-26 21:34:14,091 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-26 21:34:14,092 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-26 21:34:14,093 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-26 21:34:14,094 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-26 21:34:14,094 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-26 21:34:14,095 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-26 21:34:14,095 INFO L133 SettingsManager]: * Use SBE=true [2018-09-26 21:34:14,095 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-26 21:34:14,095 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-26 21:34:14,096 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-26 21:34:14,097 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-26 21:34:14,097 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-26 21:34:14,097 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-26 21:34:14,097 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-26 21:34:14,098 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-26 21:34:14,098 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-26 21:34:14,098 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-26 21:34:14,098 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-26 21:34:14,099 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-26 21:34:14,099 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-26 21:34:14,099 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-26 21:34:14,099 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-26 21:34:14,099 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-26 21:34:14,100 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-26 21:34:14,100 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-26 21:34:14,100 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-26 21:34:14,100 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-26 21:34:14,102 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-26 21:34:14,102 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-26 21:34:14,102 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-26 21:34:14,166 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-26 21:34:14,182 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-26 21:34:14,187 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-26 21:34:14,189 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-26 21:34:14,190 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-26 21:34:14,191 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HierarchicalTraceAbstraction/GeometricalCake.bpl [2018-09-26 21:34:14,191 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HierarchicalTraceAbstraction/GeometricalCake.bpl' [2018-09-26 21:34:14,244 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-26 21:34:14,248 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-26 21:34:14,249 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-26 21:34:14,249 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-26 21:34:14,249 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-26 21:34:14,271 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:34:14" (1/1) ... [2018-09-26 21:34:14,284 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:34:14" (1/1) ... [2018-09-26 21:34:14,289 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-26 21:34:14,289 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-26 21:34:14,289 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-26 21:34:14,291 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-26 21:34:14,292 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-26 21:34:14,293 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-26 21:34:14,293 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-26 21:34:14,304 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:34:14" (1/1) ... [2018-09-26 21:34:14,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:34:14" (1/1) ... [2018-09-26 21:34:14,305 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:34:14" (1/1) ... [2018-09-26 21:34:14,305 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:34:14" (1/1) ... [2018-09-26 21:34:14,309 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:34:14" (1/1) ... [2018-09-26 21:34:14,314 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:34:14" (1/1) ... [2018-09-26 21:34:14,315 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:34:14" (1/1) ... [2018-09-26 21:34:14,316 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-26 21:34:14,316 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-26 21:34:14,317 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-26 21:34:14,317 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-26 21:34:14,318 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:34:14" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-26 21:34:14,397 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-09-26 21:34:14,397 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-26 21:34:14,397 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-26 21:34:14,531 INFO L343 CfgBuilder]: Using library mode [2018-09-26 21:34:14,532 INFO L202 PluginConnector]: Adding new model GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:34:14 BoogieIcfgContainer [2018-09-26 21:34:14,532 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-26 21:34:14,533 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-26 21:34:14,533 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-26 21:34:14,538 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-26 21:34:14,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:34:14" (1/2) ... [2018-09-26 21:34:14,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1202d106 and model type GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.09 09:34:14, skipping insertion in model container [2018-09-26 21:34:14,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:34:14" (2/2) ... [2018-09-26 21:34:14,543 INFO L112 eAbstractionObserver]: Analyzing ICFG GeometricalCake.bpl [2018-09-26 21:34:14,555 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-26 21:34:14,566 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-26 21:34:14,612 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-26 21:34:14,613 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-26 21:34:14,613 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-26 21:34:14,613 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-26 21:34:14,613 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-26 21:34:14,613 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-26 21:34:14,614 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-26 21:34:14,614 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-26 21:34:14,614 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-26 21:34:14,629 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2018-09-26 21:34:14,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2018-09-26 21:34:14,635 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:14,636 INFO L375 BasicCegarLoop]: trace histogram [1, 1] [2018-09-26 21:34:14,637 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:14,646 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:14,646 INFO L82 PathProgramCache]: Analyzing trace with hash 967, now seen corresponding path program 1 times [2018-09-26 21:34:14,648 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:14,649 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:14,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:14,695 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:34:14,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:14,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:14,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:14,784 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:34:14,784 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-09-26 21:34:14,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-26 21:34:14,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-26 21:34:14,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-26 21:34:14,803 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2018-09-26 21:34:14,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:14,846 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-26 21:34:14,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-26 21:34:14,849 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2018-09-26 21:34:14,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:14,859 INFO L225 Difference]: With dead ends: 9 [2018-09-26 21:34:14,859 INFO L226 Difference]: Without dead ends: 4 [2018-09-26 21:34:14,863 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-26 21:34:14,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4 states. [2018-09-26 21:34:14,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4 to 4. [2018-09-26 21:34:14,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-09-26 21:34:14,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 4 transitions. [2018-09-26 21:34:14,900 INFO L78 Accepts]: Start accepts. Automaton has 4 states and 4 transitions. Word has length 2 [2018-09-26 21:34:14,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:14,900 INFO L480 AbstractCegarLoop]: Abstraction has 4 states and 4 transitions. [2018-09-26 21:34:14,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-26 21:34:14,900 INFO L276 IsEmpty]: Start isEmpty. Operand 4 states and 4 transitions. [2018-09-26 21:34:14,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-26 21:34:14,901 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:14,901 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-26 21:34:14,901 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:14,902 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:14,902 INFO L82 PathProgramCache]: Analyzing trace with hash 29921, now seen corresponding path program 1 times [2018-09-26 21:34:14,902 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:14,902 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:14,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:14,903 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:34:14,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:14,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:15,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:15,053 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:15,053 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-09-26 21:34:15,067 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:15,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:15,085 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:15,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:15,190 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:15,190 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 3 [2018-09-26 21:34:15,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-26 21:34:15,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-26 21:34:15,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-09-26 21:34:15,192 INFO L87 Difference]: Start difference. First operand 4 states and 4 transitions. Second operand 5 states. [2018-09-26 21:34:15,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:15,245 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2018-09-26 21:34:15,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-26 21:34:15,245 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 3 [2018-09-26 21:34:15,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:15,246 INFO L225 Difference]: With dead ends: 6 [2018-09-26 21:34:15,246 INFO L226 Difference]: Without dead ends: 5 [2018-09-26 21:34:15,248 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-09-26 21:34:15,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-09-26 21:34:15,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-09-26 21:34:15,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-26 21:34:15,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-26 21:34:15,252 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-09-26 21:34:15,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:15,252 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-26 21:34:15,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-26 21:34:15,252 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-26 21:34:15,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-26 21:34:15,253 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:15,253 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1] [2018-09-26 21:34:15,253 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:15,256 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:15,257 INFO L82 PathProgramCache]: Analyzing trace with hash 927495, now seen corresponding path program 2 times [2018-09-26 21:34:15,257 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:15,257 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:15,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:15,258 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:34:15,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:15,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:15,346 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:15,346 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:15,346 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 21:34:15,360 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:34:15,373 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:34:15,373 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:15,375 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:15,497 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:15,517 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:15,517 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2018-09-26 21:34:15,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:34:15,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:34:15,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:34:15,518 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 7 states. [2018-09-26 21:34:15,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:15,563 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2018-09-26 21:34:15,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-26 21:34:15,564 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 4 [2018-09-26 21:34:15,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:15,565 INFO L225 Difference]: With dead ends: 7 [2018-09-26 21:34:15,565 INFO L226 Difference]: Without dead ends: 6 [2018-09-26 21:34:15,566 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:34:15,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-26 21:34:15,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-26 21:34:15,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-26 21:34:15,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-26 21:34:15,570 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-09-26 21:34:15,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:15,570 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-26 21:34:15,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:34:15,570 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-26 21:34:15,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-26 21:34:15,571 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:15,571 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1] [2018-09-26 21:34:15,571 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:15,572 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:15,572 INFO L82 PathProgramCache]: Analyzing trace with hash 28752289, now seen corresponding path program 3 times [2018-09-26 21:34:15,572 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:15,572 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:15,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:15,573 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:15,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:15,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:15,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:15,748 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:15,748 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:15,759 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:34:15,809 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-26 21:34:15,810 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:15,811 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:16,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:16,056 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:16,056 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2018-09-26 21:34:16,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:34:16,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:34:16,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:34:16,058 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 9 states. [2018-09-26 21:34:16,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:16,096 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-09-26 21:34:16,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 21:34:16,097 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 5 [2018-09-26 21:34:16,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:16,098 INFO L225 Difference]: With dead ends: 8 [2018-09-26 21:34:16,098 INFO L226 Difference]: Without dead ends: 7 [2018-09-26 21:34:16,099 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:34:16,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-26 21:34:16,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-26 21:34:16,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-26 21:34:16,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-26 21:34:16,103 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-09-26 21:34:16,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:16,104 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-26 21:34:16,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:34:16,104 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-26 21:34:16,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-26 21:34:16,104 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:16,105 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1] [2018-09-26 21:34:16,105 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:16,105 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:16,105 INFO L82 PathProgramCache]: Analyzing trace with hash 891320903, now seen corresponding path program 4 times [2018-09-26 21:34:16,105 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:16,106 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:16,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:16,106 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:16,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:16,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:16,219 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:16,220 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:16,220 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:16,231 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:34:16,253 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:34:16,253 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:16,255 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:16,501 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:16,521 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:16,522 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2018-09-26 21:34:16,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:34:16,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:34:16,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:16,523 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 11 states. [2018-09-26 21:34:16,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:16,638 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-26 21:34:16,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:34:16,638 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 6 [2018-09-26 21:34:16,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:16,639 INFO L225 Difference]: With dead ends: 9 [2018-09-26 21:34:16,639 INFO L226 Difference]: Without dead ends: 8 [2018-09-26 21:34:16,640 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:16,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-26 21:34:16,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-26 21:34:16,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-26 21:34:16,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-26 21:34:16,643 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-09-26 21:34:16,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:16,643 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-26 21:34:16,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:34:16,644 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-26 21:34:16,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-26 21:34:16,644 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:16,644 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1] [2018-09-26 21:34:16,645 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:16,645 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:16,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144161, now seen corresponding path program 5 times [2018-09-26 21:34:16,645 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:16,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:16,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:16,646 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:16,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:16,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:16,765 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:16,765 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:16,766 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:16,775 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:34:16,785 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-26 21:34:16,786 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:16,787 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:17,283 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:17,307 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:17,307 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2018-09-26 21:34:17,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-26 21:34:17,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-26 21:34:17,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2018-09-26 21:34:17,308 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 13 states. [2018-09-26 21:34:17,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:17,397 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-26 21:34:17,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:34:17,398 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 7 [2018-09-26 21:34:17,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:17,398 INFO L225 Difference]: With dead ends: 10 [2018-09-26 21:34:17,399 INFO L226 Difference]: Without dead ends: 9 [2018-09-26 21:34:17,399 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2018-09-26 21:34:17,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-26 21:34:17,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-26 21:34:17,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-26 21:34:17,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-26 21:34:17,403 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-09-26 21:34:17,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:17,403 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-26 21:34:17,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-26 21:34:17,404 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-26 21:34:17,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-26 21:34:17,404 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:17,404 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1] [2018-09-26 21:34:17,405 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:17,405 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:17,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894087, now seen corresponding path program 6 times [2018-09-26 21:34:17,405 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:17,405 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:17,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:17,406 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:17,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:17,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:17,566 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:17,567 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:17,567 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:17,578 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:34:17,586 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-26 21:34:17,586 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:17,588 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:18,052 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:18,085 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:18,085 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-09-26 21:34:18,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-26 21:34:18,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-26 21:34:18,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2018-09-26 21:34:18,087 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 15 states. [2018-09-26 21:34:18,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:18,254 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-26 21:34:18,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:34:18,255 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 8 [2018-09-26 21:34:18,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:18,256 INFO L225 Difference]: With dead ends: 11 [2018-09-26 21:34:18,256 INFO L226 Difference]: Without dead ends: 10 [2018-09-26 21:34:18,257 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2018-09-26 21:34:18,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-26 21:34:18,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-26 21:34:18,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-26 21:34:18,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-26 21:34:18,260 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-09-26 21:34:18,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:18,260 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-26 21:34:18,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-26 21:34:18,261 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-26 21:34:18,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-26 21:34:18,261 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:18,261 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1] [2018-09-26 21:34:18,262 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:18,262 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:18,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141793, now seen corresponding path program 7 times [2018-09-26 21:34:18,262 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:18,262 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:18,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:18,263 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:18,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:18,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:18,600 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:18,601 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:18,601 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:18,610 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:34:18,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:18,627 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:18,938 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:18,961 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:18,961 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2018-09-26 21:34:18,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-26 21:34:18,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-26 21:34:18,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2018-09-26 21:34:18,963 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 17 states. [2018-09-26 21:34:19,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:19,080 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-26 21:34:19,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:34:19,081 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 9 [2018-09-26 21:34:19,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:19,081 INFO L225 Difference]: With dead ends: 12 [2018-09-26 21:34:19,082 INFO L226 Difference]: Without dead ends: 11 [2018-09-26 21:34:19,082 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2018-09-26 21:34:19,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-26 21:34:19,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-26 21:34:19,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-26 21:34:19,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-26 21:34:19,087 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-09-26 21:34:19,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:19,088 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-26 21:34:19,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-26 21:34:19,088 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-26 21:34:19,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-26 21:34:19,088 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:19,089 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1] [2018-09-26 21:34:19,089 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:19,089 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:19,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820679, now seen corresponding path program 8 times [2018-09-26 21:34:19,089 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:19,090 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:19,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:19,091 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:34:19,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:19,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:19,464 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:19,464 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:19,464 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:19,472 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:34:19,483 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:34:19,484 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:19,485 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:19,803 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:19,824 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:19,824 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2018-09-26 21:34:19,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-26 21:34:19,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-26 21:34:19,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2018-09-26 21:34:19,826 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 19 states. [2018-09-26 21:34:19,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:19,953 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-26 21:34:19,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:34:19,954 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 10 [2018-09-26 21:34:19,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:19,955 INFO L225 Difference]: With dead ends: 13 [2018-09-26 21:34:19,955 INFO L226 Difference]: Without dead ends: 12 [2018-09-26 21:34:19,956 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2018-09-26 21:34:19,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-26 21:34:19,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-26 21:34:19,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-26 21:34:19,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-26 21:34:19,960 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-09-26 21:34:19,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:19,961 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-26 21:34:19,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-26 21:34:19,961 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-26 21:34:19,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-26 21:34:19,961 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:19,962 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1] [2018-09-26 21:34:19,962 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:19,962 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:19,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166559, now seen corresponding path program 9 times [2018-09-26 21:34:19,962 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:19,962 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:19,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:19,963 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:19,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:19,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:20,272 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:20,273 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:20,273 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:20,289 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:34:20,311 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-26 21:34:20,312 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:20,314 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:20,727 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:20,748 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:20,748 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2018-09-26 21:34:20,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-26 21:34:20,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-26 21:34:20,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2018-09-26 21:34:20,749 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 21 states. [2018-09-26 21:34:20,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:20,929 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-26 21:34:20,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-26 21:34:20,930 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 11 [2018-09-26 21:34:20,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:20,930 INFO L225 Difference]: With dead ends: 14 [2018-09-26 21:34:20,930 INFO L226 Difference]: Without dead ends: 13 [2018-09-26 21:34:20,931 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2018-09-26 21:34:20,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-26 21:34:20,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-26 21:34:20,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-26 21:34:20,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-26 21:34:20,935 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-09-26 21:34:20,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:20,936 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-26 21:34:20,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-26 21:34:20,936 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-26 21:34:20,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-26 21:34:20,936 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:20,937 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1] [2018-09-26 21:34:20,937 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:20,937 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:20,937 INFO L82 PathProgramCache]: Analyzing trace with hash -562523129, now seen corresponding path program 10 times [2018-09-26 21:34:20,937 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:20,938 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:20,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:20,938 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:20,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:20,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:21,193 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:21,193 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:21,193 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:21,202 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:34:21,213 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:34:21,213 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:21,215 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:21,679 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:21,700 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:21,700 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2018-09-26 21:34:21,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-26 21:34:21,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-26 21:34:21,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2018-09-26 21:34:21,702 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 23 states. [2018-09-26 21:34:22,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:22,226 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-26 21:34:22,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-26 21:34:22,227 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 12 [2018-09-26 21:34:22,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:22,228 INFO L225 Difference]: With dead ends: 15 [2018-09-26 21:34:22,228 INFO L226 Difference]: Without dead ends: 14 [2018-09-26 21:34:22,229 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2018-09-26 21:34:22,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-26 21:34:22,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-26 21:34:22,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-26 21:34:22,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-26 21:34:22,232 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-09-26 21:34:22,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:22,233 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-26 21:34:22,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-26 21:34:22,233 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-26 21:34:22,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:34:22,234 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:22,234 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1] [2018-09-26 21:34:22,234 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:22,234 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:22,234 INFO L82 PathProgramCache]: Analyzing trace with hash -258347871, now seen corresponding path program 11 times [2018-09-26 21:34:22,235 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:22,235 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:22,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:22,236 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:22,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:22,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:22,775 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:22,776 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:22,776 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:22,785 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:34:22,811 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-26 21:34:22,811 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:22,813 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:23,310 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:23,333 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:23,333 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2018-09-26 21:34:23,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-26 21:34:23,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-26 21:34:23,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2018-09-26 21:34:23,334 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 25 states. [2018-09-26 21:34:23,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:23,778 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-09-26 21:34:23,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-26 21:34:23,779 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 13 [2018-09-26 21:34:23,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:23,780 INFO L225 Difference]: With dead ends: 16 [2018-09-26 21:34:23,780 INFO L226 Difference]: Without dead ends: 15 [2018-09-26 21:34:23,781 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2018-09-26 21:34:23,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-26 21:34:23,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-26 21:34:23,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-26 21:34:23,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-26 21:34:23,786 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-09-26 21:34:23,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:23,786 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-26 21:34:23,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-26 21:34:23,787 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-26 21:34:23,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-26 21:34:23,787 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:23,787 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1] [2018-09-26 21:34:23,788 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:23,788 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:23,788 INFO L82 PathProgramCache]: Analyzing trace with hash 581150535, now seen corresponding path program 12 times [2018-09-26 21:34:23,788 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:23,788 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:23,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:23,790 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:23,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:23,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:24,200 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:24,201 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:24,201 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:24,211 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:34:24,229 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-26 21:34:24,229 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:24,232 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:24,726 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:24,746 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:24,746 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2018-09-26 21:34:24,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-26 21:34:24,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-26 21:34:24,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2018-09-26 21:34:24,748 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 27 states. [2018-09-26 21:34:25,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:25,315 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-26 21:34:25,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-26 21:34:25,316 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 14 [2018-09-26 21:34:25,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:25,317 INFO L225 Difference]: With dead ends: 17 [2018-09-26 21:34:25,317 INFO L226 Difference]: Without dead ends: 16 [2018-09-26 21:34:25,318 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2018-09-26 21:34:25,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-26 21:34:25,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-26 21:34:25,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-26 21:34:25,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-26 21:34:25,323 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-09-26 21:34:25,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:25,323 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-26 21:34:25,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-26 21:34:25,323 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-26 21:34:25,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:34:25,324 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:25,324 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1] [2018-09-26 21:34:25,324 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:25,324 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:25,325 INFO L82 PathProgramCache]: Analyzing trace with hash 835797345, now seen corresponding path program 13 times [2018-09-26 21:34:25,325 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:25,325 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:25,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:25,326 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:25,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:25,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:25,796 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:25,796 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:25,796 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:25,806 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:34:25,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:25,834 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:26,546 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:26,569 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:26,569 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2018-09-26 21:34:26,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-26 21:34:26,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-26 21:34:26,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2018-09-26 21:34:26,571 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 29 states. [2018-09-26 21:34:26,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:26,989 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-09-26 21:34:26,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-26 21:34:26,990 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 15 [2018-09-26 21:34:26,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:26,991 INFO L225 Difference]: With dead ends: 18 [2018-09-26 21:34:26,991 INFO L226 Difference]: Without dead ends: 17 [2018-09-26 21:34:26,992 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2018-09-26 21:34:26,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-26 21:34:26,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-26 21:34:26,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-26 21:34:26,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-26 21:34:26,996 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-09-26 21:34:26,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:26,997 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-26 21:34:26,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-26 21:34:26,997 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-26 21:34:26,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-26 21:34:26,997 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:26,997 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1] [2018-09-26 21:34:26,998 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:26,998 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:26,998 INFO L82 PathProgramCache]: Analyzing trace with hash 139913863, now seen corresponding path program 14 times [2018-09-26 21:34:26,998 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:26,998 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:26,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:26,999 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:34:26,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:27,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:27,668 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:27,669 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:27,669 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:27,681 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:34:27,696 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:34:27,697 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:27,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:28,575 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:28,596 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:28,596 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2018-09-26 21:34:28,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-26 21:34:28,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-26 21:34:28,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=752, Unknown=0, NotChecked=0, Total=930 [2018-09-26 21:34:28,597 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 31 states. [2018-09-26 21:34:28,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:28,982 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-26 21:34:28,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-26 21:34:28,982 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 16 [2018-09-26 21:34:28,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:28,983 INFO L225 Difference]: With dead ends: 19 [2018-09-26 21:34:28,983 INFO L226 Difference]: Without dead ends: 18 [2018-09-26 21:34:28,985 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=178, Invalid=752, Unknown=0, NotChecked=0, Total=930 [2018-09-26 21:34:28,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-26 21:34:28,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-26 21:34:28,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-26 21:34:28,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-26 21:34:28,989 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-09-26 21:34:28,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:28,989 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-26 21:34:28,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-26 21:34:28,990 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-26 21:34:28,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:34:28,990 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:28,990 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1] [2018-09-26 21:34:28,991 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:28,991 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:28,991 INFO L82 PathProgramCache]: Analyzing trace with hash 42362401, now seen corresponding path program 15 times [2018-09-26 21:34:28,991 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:28,991 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:28,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:28,992 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:28,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:29,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:29,636 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:29,637 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:29,637 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:29,645 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:34:29,666 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-26 21:34:29,666 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:29,669 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:30,640 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:30,660 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:30,661 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 31 [2018-09-26 21:34:30,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-26 21:34:30,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-26 21:34:30,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=858, Unknown=0, NotChecked=0, Total=1056 [2018-09-26 21:34:30,662 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 33 states. [2018-09-26 21:34:31,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:31,216 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-09-26 21:34:31,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-26 21:34:31,216 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 17 [2018-09-26 21:34:31,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:31,217 INFO L225 Difference]: With dead ends: 20 [2018-09-26 21:34:31,217 INFO L226 Difference]: Without dead ends: 19 [2018-09-26 21:34:31,218 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=198, Invalid=858, Unknown=0, NotChecked=0, Total=1056 [2018-09-26 21:34:31,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-26 21:34:31,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-26 21:34:31,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-26 21:34:31,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-26 21:34:31,222 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-09-26 21:34:31,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:31,223 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-26 21:34:31,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-26 21:34:31,223 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-26 21:34:31,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-26 21:34:31,223 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:31,223 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1] [2018-09-26 21:34:31,224 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:31,224 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:31,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1313234375, now seen corresponding path program 16 times [2018-09-26 21:34:31,224 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:31,224 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:31,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:31,225 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:31,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:31,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:31,695 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:31,695 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:31,695 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:31,702 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:34:31,718 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:34:31,718 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:31,720 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:32,603 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:32,623 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:32,623 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2018-09-26 21:34:32,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-26 21:34:32,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-26 21:34:32,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=971, Unknown=0, NotChecked=0, Total=1190 [2018-09-26 21:34:32,625 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 35 states. [2018-09-26 21:34:33,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:33,252 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-26 21:34:33,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-26 21:34:33,253 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 18 [2018-09-26 21:34:33,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:33,253 INFO L225 Difference]: With dead ends: 21 [2018-09-26 21:34:33,254 INFO L226 Difference]: Without dead ends: 20 [2018-09-26 21:34:33,255 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=219, Invalid=971, Unknown=0, NotChecked=0, Total=1190 [2018-09-26 21:34:33,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-26 21:34:33,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-26 21:34:33,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-26 21:34:33,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-26 21:34:33,259 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-09-26 21:34:33,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:33,259 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-26 21:34:33,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-26 21:34:33,259 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-26 21:34:33,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:34:33,260 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:33,260 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1] [2018-09-26 21:34:33,260 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:33,261 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:33,261 INFO L82 PathProgramCache]: Analyzing trace with hash 2055559905, now seen corresponding path program 17 times [2018-09-26 21:34:33,261 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:33,261 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:33,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:33,262 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:33,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:33,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:33,719 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:33,719 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:33,720 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:33,734 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:34:33,815 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-26 21:34:33,815 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:33,820 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:34,672 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:34,693 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:34,693 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2018-09-26 21:34:34,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-26 21:34:34,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-26 21:34:34,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1091, Unknown=0, NotChecked=0, Total=1332 [2018-09-26 21:34:34,695 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 37 states. [2018-09-26 21:34:35,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:35,335 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-09-26 21:34:35,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-26 21:34:35,336 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 19 [2018-09-26 21:34:35,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:35,336 INFO L225 Difference]: With dead ends: 22 [2018-09-26 21:34:35,336 INFO L226 Difference]: Without dead ends: 21 [2018-09-26 21:34:35,337 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=241, Invalid=1091, Unknown=0, NotChecked=0, Total=1332 [2018-09-26 21:34:35,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-26 21:34:35,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-26 21:34:35,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-26 21:34:35,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-26 21:34:35,342 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-09-26 21:34:35,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:35,342 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-26 21:34:35,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-26 21:34:35,343 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-26 21:34:35,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-26 21:34:35,343 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:35,343 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1] [2018-09-26 21:34:35,343 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:35,343 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:35,344 INFO L82 PathProgramCache]: Analyzing trace with hash -702152441, now seen corresponding path program 18 times [2018-09-26 21:34:35,344 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:35,344 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:35,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:35,345 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:35,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:35,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:35,937 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:35,937 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:35,938 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:35,945 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:34:35,964 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-26 21:34:35,964 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:35,968 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:37,162 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:37,182 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:37,182 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 37 [2018-09-26 21:34:37,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-26 21:34:37,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-26 21:34:37,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1218, Unknown=0, NotChecked=0, Total=1482 [2018-09-26 21:34:37,184 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 39 states. [2018-09-26 21:34:37,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:37,942 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-26 21:34:37,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-26 21:34:37,943 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 20 [2018-09-26 21:34:37,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:37,944 INFO L225 Difference]: With dead ends: 23 [2018-09-26 21:34:37,944 INFO L226 Difference]: Without dead ends: 22 [2018-09-26 21:34:37,945 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=264, Invalid=1218, Unknown=0, NotChecked=0, Total=1482 [2018-09-26 21:34:37,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-26 21:34:37,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-26 21:34:37,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-26 21:34:37,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-26 21:34:37,950 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-09-26 21:34:37,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:37,950 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-26 21:34:37,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-26 21:34:37,950 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-26 21:34:37,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-26 21:34:37,951 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:37,951 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1] [2018-09-26 21:34:37,951 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:37,951 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:37,952 INFO L82 PathProgramCache]: Analyzing trace with hash -291889247, now seen corresponding path program 19 times [2018-09-26 21:34:37,952 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:37,952 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:37,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:37,953 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:37,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:37,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:38,512 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:38,513 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:38,513 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:38,522 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:34:38,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:38,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:39,936 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:39,966 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:39,967 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 39 [2018-09-26 21:34:39,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-26 21:34:39,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-26 21:34:39,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1352, Unknown=0, NotChecked=0, Total=1640 [2018-09-26 21:34:39,968 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 41 states. [2018-09-26 21:34:40,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:40,876 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-09-26 21:34:40,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-26 21:34:40,877 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 21 [2018-09-26 21:34:40,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:40,877 INFO L225 Difference]: With dead ends: 24 [2018-09-26 21:34:40,878 INFO L226 Difference]: Without dead ends: 23 [2018-09-26 21:34:40,878 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=288, Invalid=1352, Unknown=0, NotChecked=0, Total=1640 [2018-09-26 21:34:40,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-26 21:34:40,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-26 21:34:40,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-26 21:34:40,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-26 21:34:40,886 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-09-26 21:34:40,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:40,887 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-26 21:34:40,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-26 21:34:40,888 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-26 21:34:40,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-26 21:34:40,888 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:40,888 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1] [2018-09-26 21:34:40,889 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:40,889 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:40,889 INFO L82 PathProgramCache]: Analyzing trace with hash -458632121, now seen corresponding path program 20 times [2018-09-26 21:34:40,889 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:40,889 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:40,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:40,891 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:34:40,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:40,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:41,653 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:41,653 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:41,653 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:41,661 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:34:41,680 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:34:41,680 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:41,682 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:43,231 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:43,251 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:43,251 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 41 [2018-09-26 21:34:43,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-26 21:34:43,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-26 21:34:43,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=1493, Unknown=0, NotChecked=0, Total=1806 [2018-09-26 21:34:43,252 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 43 states. [2018-09-26 21:34:44,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:44,127 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-26 21:34:44,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-26 21:34:44,128 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 22 [2018-09-26 21:34:44,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:44,128 INFO L225 Difference]: With dead ends: 25 [2018-09-26 21:34:44,128 INFO L226 Difference]: Without dead ends: 24 [2018-09-26 21:34:44,129 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=313, Invalid=1493, Unknown=0, NotChecked=0, Total=1806 [2018-09-26 21:34:44,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-26 21:34:44,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-26 21:34:44,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:34:44,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-26 21:34:44,133 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-09-26 21:34:44,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:44,134 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-26 21:34:44,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-26 21:34:44,134 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-26 21:34:44,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-26 21:34:44,134 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:44,135 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1] [2018-09-26 21:34:44,135 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:44,135 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:44,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1332693919, now seen corresponding path program 21 times [2018-09-26 21:34:44,135 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:44,135 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:44,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:44,136 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:44,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:44,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:44,938 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:44,938 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:44,938 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:44,946 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:34:44,974 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-26 21:34:44,974 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:44,980 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:46,951 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:46,971 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:46,972 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 43 [2018-09-26 21:34:46,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-26 21:34:46,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-26 21:34:46,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=1641, Unknown=0, NotChecked=0, Total=1980 [2018-09-26 21:34:46,973 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 45 states. [2018-09-26 21:34:47,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:47,860 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-09-26 21:34:47,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-26 21:34:47,863 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 23 [2018-09-26 21:34:47,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:47,864 INFO L225 Difference]: With dead ends: 26 [2018-09-26 21:34:47,864 INFO L226 Difference]: Without dead ends: 25 [2018-09-26 21:34:47,865 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=339, Invalid=1641, Unknown=0, NotChecked=0, Total=1980 [2018-09-26 21:34:47,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-26 21:34:47,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-26 21:34:47,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-26 21:34:47,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-26 21:34:47,869 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-09-26 21:34:47,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:47,869 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-26 21:34:47,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-26 21:34:47,869 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-26 21:34:47,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-26 21:34:47,870 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:47,870 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1] [2018-09-26 21:34:47,870 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:47,871 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:47,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1636161415, now seen corresponding path program 22 times [2018-09-26 21:34:47,871 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:47,871 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:47,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:47,872 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:47,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:47,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:48,732 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:48,732 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:48,732 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:48,741 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:34:48,766 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:34:48,766 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:48,768 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:50,335 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:50,356 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:50,356 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 45 [2018-09-26 21:34:50,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-26 21:34:50,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-26 21:34:50,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=1796, Unknown=0, NotChecked=0, Total=2162 [2018-09-26 21:34:50,358 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 47 states. [2018-09-26 21:34:51,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:51,463 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-26 21:34:51,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-26 21:34:51,464 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 24 [2018-09-26 21:34:51,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:51,465 INFO L225 Difference]: With dead ends: 27 [2018-09-26 21:34:51,465 INFO L226 Difference]: Without dead ends: 26 [2018-09-26 21:34:51,466 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=366, Invalid=1796, Unknown=0, NotChecked=0, Total=2162 [2018-09-26 21:34:51,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-26 21:34:51,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-26 21:34:51,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:34:51,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-26 21:34:51,470 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-09-26 21:34:51,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:51,471 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-26 21:34:51,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-26 21:34:51,471 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-26 21:34:51,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-26 21:34:51,471 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:51,471 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1] [2018-09-26 21:34:51,471 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:51,471 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:51,472 INFO L82 PathProgramCache]: Analyzing trace with hash -818603743, now seen corresponding path program 23 times [2018-09-26 21:34:51,472 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:51,472 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:51,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:51,472 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:51,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:51,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:52,501 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:52,502 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:52,502 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:52,511 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:34:52,542 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-26 21:34:52,542 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:52,551 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:54,291 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:54,311 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:54,312 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 47 [2018-09-26 21:34:54,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-26 21:34:54,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-26 21:34:54,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=1958, Unknown=0, NotChecked=0, Total=2352 [2018-09-26 21:34:54,314 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 49 states. [2018-09-26 21:34:55,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:55,957 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-09-26 21:34:55,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-26 21:34:55,958 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 25 [2018-09-26 21:34:55,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:55,959 INFO L225 Difference]: With dead ends: 28 [2018-09-26 21:34:55,959 INFO L226 Difference]: Without dead ends: 27 [2018-09-26 21:34:55,960 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=394, Invalid=1958, Unknown=0, NotChecked=0, Total=2352 [2018-09-26 21:34:55,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-26 21:34:55,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-26 21:34:55,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-26 21:34:55,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-26 21:34:55,964 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-09-26 21:34:55,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:55,965 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-26 21:34:55,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-26 21:34:55,965 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-26 21:34:55,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-26 21:34:55,965 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:55,966 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1] [2018-09-26 21:34:55,966 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:55,966 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:55,966 INFO L82 PathProgramCache]: Analyzing trace with hash 393087687, now seen corresponding path program 24 times [2018-09-26 21:34:55,966 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:55,966 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:55,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:55,967 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:55,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:55,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:57,155 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:57,155 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:57,155 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:57,164 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:34:57,204 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-26 21:34:57,204 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:57,215 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:59,318 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:59,339 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:59,339 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2018-09-26 21:34:59,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-26 21:34:59,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-26 21:34:59,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=2127, Unknown=0, NotChecked=0, Total=2550 [2018-09-26 21:34:59,340 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 51 states. [2018-09-26 21:35:00,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:35:00,564 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-26 21:35:00,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-26 21:35:00,565 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 26 [2018-09-26 21:35:00,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:35:00,566 INFO L225 Difference]: With dead ends: 29 [2018-09-26 21:35:00,566 INFO L226 Difference]: Without dead ends: 28 [2018-09-26 21:35:00,567 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=423, Invalid=2127, Unknown=0, NotChecked=0, Total=2550 [2018-09-26 21:35:00,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-26 21:35:00,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-26 21:35:00,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:35:00,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-26 21:35:00,572 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-09-26 21:35:00,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:35:00,572 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-26 21:35:00,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-26 21:35:00,572 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-26 21:35:00,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-26 21:35:00,573 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:35:00,573 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1] [2018-09-26 21:35:00,573 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:35:00,573 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:35:00,573 INFO L82 PathProgramCache]: Analyzing trace with hash -699183647, now seen corresponding path program 25 times [2018-09-26 21:35:00,574 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:35:00,574 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:35:00,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:00,574 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:35:00,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:00,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:02,419 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:02,419 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:35:02,419 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:35:02,427 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:35:02,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:02,456 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:35:05,093 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:05,113 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:35:05,114 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 51 [2018-09-26 21:35:05,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-26 21:35:05,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-26 21:35:05,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=453, Invalid=2303, Unknown=0, NotChecked=0, Total=2756 [2018-09-26 21:35:05,115 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 53 states. [2018-09-26 21:35:06,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:35:06,423 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-09-26 21:35:06,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-26 21:35:06,425 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 27 [2018-09-26 21:35:06,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:35:06,426 INFO L225 Difference]: With dead ends: 30 [2018-09-26 21:35:06,426 INFO L226 Difference]: Without dead ends: 29 [2018-09-26 21:35:06,427 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=453, Invalid=2303, Unknown=0, NotChecked=0, Total=2756 [2018-09-26 21:35:06,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-26 21:35:06,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-26 21:35:06,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-26 21:35:06,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-26 21:35:06,434 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-09-26 21:35:06,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:35:06,434 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-26 21:35:06,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-26 21:35:06,434 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-26 21:35:06,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-26 21:35:06,435 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:35:06,435 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1] [2018-09-26 21:35:06,435 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:35:06,435 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:35:06,436 INFO L82 PathProgramCache]: Analyzing trace with hash -199856633, now seen corresponding path program 26 times [2018-09-26 21:35:06,436 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:35:06,436 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:35:06,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:06,437 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:35:06,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:06,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:07,631 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:07,632 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:35:07,632 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:35:07,640 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:35:07,672 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:35:07,672 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:35:07,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:35:10,283 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:10,304 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:35:10,304 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 53 [2018-09-26 21:35:10,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-26 21:35:10,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-26 21:35:10,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=484, Invalid=2486, Unknown=0, NotChecked=0, Total=2970 [2018-09-26 21:35:10,306 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 55 states. [2018-09-26 21:35:12,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:35:12,305 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-26 21:35:12,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-26 21:35:12,306 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 28 [2018-09-26 21:35:12,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:35:12,306 INFO L225 Difference]: With dead ends: 31 [2018-09-26 21:35:12,306 INFO L226 Difference]: Without dead ends: 30 [2018-09-26 21:35:12,308 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=484, Invalid=2486, Unknown=0, NotChecked=0, Total=2970 [2018-09-26 21:35:12,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-26 21:35:12,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-26 21:35:12,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:35:12,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-26 21:35:12,312 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-09-26 21:35:12,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:35:12,312 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-26 21:35:12,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-26 21:35:12,312 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-26 21:35:12,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-26 21:35:12,313 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:35:12,313 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1] [2018-09-26 21:35:12,313 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:35:12,313 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:35:12,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1900588383, now seen corresponding path program 27 times [2018-09-26 21:35:12,314 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:35:12,314 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:35:12,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:12,314 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:35:12,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:12,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:14,153 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:14,153 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:35:14,153 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:35:14,161 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:35:14,212 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-26 21:35:14,212 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:35:14,223 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:35:17,064 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:17,084 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:35:17,084 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 55 [2018-09-26 21:35:17,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-26 21:35:17,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-26 21:35:17,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=516, Invalid=2676, Unknown=0, NotChecked=0, Total=3192 [2018-09-26 21:35:17,086 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 57 states. [2018-09-26 21:35:19,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:35:19,355 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-09-26 21:35:19,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-26 21:35:19,356 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 29 [2018-09-26 21:35:19,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:35:19,356 INFO L225 Difference]: With dead ends: 32 [2018-09-26 21:35:19,357 INFO L226 Difference]: Without dead ends: 31 [2018-09-26 21:35:19,358 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=516, Invalid=2676, Unknown=0, NotChecked=0, Total=3192 [2018-09-26 21:35:19,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-26 21:35:19,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-26 21:35:19,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-26 21:35:19,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-26 21:35:19,363 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-09-26 21:35:19,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:35:19,363 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-26 21:35:19,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-26 21:35:19,364 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-26 21:35:19,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-26 21:35:19,364 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:35:19,364 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1] [2018-09-26 21:35:19,364 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:35:19,364 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:35:19,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1211302215, now seen corresponding path program 28 times [2018-09-26 21:35:19,365 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:35:19,365 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:35:19,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:19,365 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:35:19,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:19,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:20,753 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:20,753 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:35:20,753 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:35:20,761 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:35:20,796 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:35:20,796 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:35:20,799 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:35:23,787 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:23,815 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:35:23,815 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 57 [2018-09-26 21:35:23,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-26 21:35:23,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-26 21:35:23,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=549, Invalid=2873, Unknown=0, NotChecked=0, Total=3422 [2018-09-26 21:35:23,816 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 59 states. [2018-09-26 21:35:25,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:35:25,885 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-26 21:35:25,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-26 21:35:25,886 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 30 [2018-09-26 21:35:25,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:35:25,886 INFO L225 Difference]: With dead ends: 33 [2018-09-26 21:35:25,887 INFO L226 Difference]: Without dead ends: 32 [2018-09-26 21:35:25,888 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=549, Invalid=2873, Unknown=0, NotChecked=0, Total=3422 [2018-09-26 21:35:25,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-26 21:35:25,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-26 21:35:25,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:35:25,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-26 21:35:25,893 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-09-26 21:35:25,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:35:25,893 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-26 21:35:25,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-26 21:35:25,893 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-26 21:35:25,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-26 21:35:25,894 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:35:25,894 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1] [2018-09-26 21:35:25,894 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:35:25,894 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:35:25,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1104337055, now seen corresponding path program 29 times [2018-09-26 21:35:25,895 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:35:25,895 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:35:25,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:25,902 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:35:25,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:25,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:27,449 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:27,450 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:35:27,450 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:35:27,463 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:35:27,517 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-26 21:35:27,517 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:35:27,533 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:35:30,871 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:30,892 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:35:30,893 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 59 [2018-09-26 21:35:30,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-26 21:35:30,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-26 21:35:30,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=583, Invalid=3077, Unknown=0, NotChecked=0, Total=3660 [2018-09-26 21:35:30,894 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 61 states. [2018-09-26 21:35:32,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:35:32,744 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-09-26 21:35:32,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-26 21:35:32,744 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 31 [2018-09-26 21:35:32,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:35:32,745 INFO L225 Difference]: With dead ends: 34 [2018-09-26 21:35:32,745 INFO L226 Difference]: Without dead ends: 33 [2018-09-26 21:35:32,746 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=583, Invalid=3077, Unknown=0, NotChecked=0, Total=3660 [2018-09-26 21:35:32,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-26 21:35:32,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-26 21:35:32,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-26 21:35:32,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-26 21:35:32,751 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-09-26 21:35:32,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:35:32,751 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-26 21:35:32,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-26 21:35:32,751 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-26 21:35:32,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-26 21:35:32,752 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:35:32,752 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1] [2018-09-26 21:35:32,752 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:35:32,752 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:35:32,753 INFO L82 PathProgramCache]: Analyzing trace with hash 125289607, now seen corresponding path program 30 times [2018-09-26 21:35:32,753 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:35:32,753 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:35:32,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:32,754 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:35:32,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:32,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:34,645 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:34,645 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:35:34,645 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:35:34,655 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:35:34,715 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-26 21:35:34,716 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:35:34,743 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:35:38,213 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:38,233 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:35:38,234 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 61 [2018-09-26 21:35:38,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-26 21:35:38,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-26 21:35:38,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=618, Invalid=3288, Unknown=0, NotChecked=0, Total=3906 [2018-09-26 21:35:38,235 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 63 states. [2018-09-26 21:35:40,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:35:40,597 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-26 21:35:40,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-26 21:35:40,598 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 32 [2018-09-26 21:35:40,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:35:40,598 INFO L225 Difference]: With dead ends: 35 [2018-09-26 21:35:40,599 INFO L226 Difference]: Without dead ends: 34 [2018-09-26 21:35:40,600 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=618, Invalid=3288, Unknown=0, NotChecked=0, Total=3906 [2018-09-26 21:35:40,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-26 21:35:40,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-26 21:35:40,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:35:40,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-26 21:35:40,603 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-09-26 21:35:40,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:35:40,604 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-26 21:35:40,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-26 21:35:40,604 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-26 21:35:40,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-26 21:35:40,604 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:35:40,604 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1] [2018-09-26 21:35:40,605 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:35:40,605 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:35:40,605 INFO L82 PathProgramCache]: Analyzing trace with hash -410989535, now seen corresponding path program 31 times [2018-09-26 21:35:40,605 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:35:40,605 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:35:40,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:40,606 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:35:40,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:40,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:42,397 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:42,397 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:35:42,397 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:35:42,409 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:35:42,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:42,455 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:35:46,527 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:46,547 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:35:46,547 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 63 [2018-09-26 21:35:46,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-26 21:35:46,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-26 21:35:46,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=654, Invalid=3506, Unknown=0, NotChecked=0, Total=4160 [2018-09-26 21:35:46,549 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 65 states. [2018-09-26 21:35:49,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:35:49,353 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-09-26 21:35:49,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-26 21:35:49,354 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 33 [2018-09-26 21:35:49,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:35:49,355 INFO L225 Difference]: With dead ends: 36 [2018-09-26 21:35:49,355 INFO L226 Difference]: Without dead ends: 35 [2018-09-26 21:35:49,356 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=654, Invalid=3506, Unknown=0, NotChecked=0, Total=4160 [2018-09-26 21:35:49,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-26 21:35:49,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-26 21:35:49,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-26 21:35:49,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-26 21:35:49,361 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-09-26 21:35:49,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:35:49,361 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-26 21:35:49,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-26 21:35:49,361 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-26 21:35:49,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-26 21:35:49,361 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:35:49,361 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1] [2018-09-26 21:35:49,362 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:35:49,362 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:35:49,362 INFO L82 PathProgramCache]: Analyzing trace with hash 144226247, now seen corresponding path program 32 times [2018-09-26 21:35:49,362 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:35:49,362 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:35:49,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:49,363 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:35:49,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:49,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:51,332 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:51,332 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:35:51,333 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:35:51,340 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:35:51,383 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:35:51,383 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:35:51,385 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:35:55,468 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:55,488 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:35:55,489 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 65 [2018-09-26 21:35:55,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-26 21:35:55,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-26 21:35:55,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=691, Invalid=3731, Unknown=0, NotChecked=0, Total=4422 [2018-09-26 21:35:55,490 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 67 states. [2018-09-26 21:35:58,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:35:58,960 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-26 21:35:58,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-26 21:35:58,960 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 34 [2018-09-26 21:35:58,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:35:58,961 INFO L225 Difference]: With dead ends: 37 [2018-09-26 21:35:58,961 INFO L226 Difference]: Without dead ends: 36 [2018-09-26 21:35:58,962 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=691, Invalid=3731, Unknown=0, NotChecked=0, Total=4422 [2018-09-26 21:35:58,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-26 21:35:58,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-26 21:35:58,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-26 21:35:58,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-26 21:35:58,968 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-09-26 21:35:58,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:35:58,968 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-26 21:35:58,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-26 21:35:58,968 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-26 21:35:58,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-26 21:35:58,969 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:35:58,969 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1] [2018-09-26 21:35:58,969 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:35:58,969 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:35:58,969 INFO L82 PathProgramCache]: Analyzing trace with hash 176046305, now seen corresponding path program 33 times [2018-09-26 21:35:58,969 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:35:58,970 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:35:58,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:58,970 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:35:58,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:59,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:36:01,141 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:01,142 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:36:01,142 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:36:01,149 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:36:01,224 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-26 21:36:01,224 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:36:01,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:36:05,696 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:05,716 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:36:05,717 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 67 [2018-09-26 21:36:05,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-26 21:36:05,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-26 21:36:05,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=729, Invalid=3963, Unknown=0, NotChecked=0, Total=4692 [2018-09-26 21:36:05,718 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 69 states. [2018-09-26 21:36:08,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:36:08,816 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-09-26 21:36:08,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-26 21:36:08,817 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 35 [2018-09-26 21:36:08,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:36:08,817 INFO L225 Difference]: With dead ends: 38 [2018-09-26 21:36:08,818 INFO L226 Difference]: Without dead ends: 37 [2018-09-26 21:36:08,819 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=729, Invalid=3963, Unknown=0, NotChecked=0, Total=4692 [2018-09-26 21:36:08,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-26 21:36:08,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-26 21:36:08,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-26 21:36:08,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-26 21:36:08,825 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-09-26 21:36:08,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:36:08,825 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-26 21:36:08,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-26 21:36:08,825 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-26 21:36:08,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-26 21:36:08,826 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:36:08,826 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1] [2018-09-26 21:36:08,826 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:36:08,826 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:36:08,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1162468103, now seen corresponding path program 34 times [2018-09-26 21:36:08,826 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:36:08,827 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:36:08,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:08,827 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:36:08,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:08,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:36:11,211 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:11,212 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:36:11,212 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:36:11,219 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:36:11,269 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:36:11,269 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:36:11,271 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:36:16,154 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:16,175 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:36:16,175 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 69 [2018-09-26 21:36:16,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-26 21:36:16,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-26 21:36:16,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=768, Invalid=4202, Unknown=0, NotChecked=0, Total=4970 [2018-09-26 21:36:16,176 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 71 states. [2018-09-26 21:36:20,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:36:20,108 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-26 21:36:20,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-26 21:36:20,109 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 36 [2018-09-26 21:36:20,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:36:20,109 INFO L225 Difference]: With dead ends: 39 [2018-09-26 21:36:20,110 INFO L226 Difference]: Without dead ends: 38 [2018-09-26 21:36:20,110 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=768, Invalid=4202, Unknown=0, NotChecked=0, Total=4970 [2018-09-26 21:36:20,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-26 21:36:20,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-26 21:36:20,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-26 21:36:20,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-26 21:36:20,115 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-09-26 21:36:20,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:36:20,115 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-26 21:36:20,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-26 21:36:20,115 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-26 21:36:20,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-26 21:36:20,115 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:36:20,115 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1] [2018-09-26 21:36:20,115 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:36:20,116 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:36:20,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1676772769, now seen corresponding path program 35 times [2018-09-26 21:36:20,116 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:36:20,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:36:20,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:20,116 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:36:20,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:20,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:36:22,684 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:22,684 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:36:22,685 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:36:22,692 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:36:22,767 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-26 21:36:22,768 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:36:22,795 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:36:28,160 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:28,180 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:36:28,181 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 71 [2018-09-26 21:36:28,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-26 21:36:28,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-26 21:36:28,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=808, Invalid=4448, Unknown=0, NotChecked=0, Total=5256 [2018-09-26 21:36:28,182 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 73 states. [2018-09-26 21:36:31,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:36:31,887 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-09-26 21:36:31,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-26 21:36:31,888 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 37 [2018-09-26 21:36:31,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:36:31,888 INFO L225 Difference]: With dead ends: 40 [2018-09-26 21:36:31,889 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:36:31,889 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=808, Invalid=4448, Unknown=0, NotChecked=0, Total=5256 [2018-09-26 21:36:31,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:36:31,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-26 21:36:31,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-26 21:36:31,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-26 21:36:31,895 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-09-26 21:36:31,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:36:31,895 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-26 21:36:31,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-26 21:36:31,895 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-26 21:36:31,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-26 21:36:31,896 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:36:31,896 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1] [2018-09-26 21:36:31,896 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:36:31,896 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:36:31,896 INFO L82 PathProgramCache]: Analyzing trace with hash 440348231, now seen corresponding path program 36 times [2018-09-26 21:36:31,896 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:36:31,897 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:36:31,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:31,897 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:36:31,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:31,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:36:34,643 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:34,643 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:36:34,643 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:36:34,651 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:36:34,718 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-26 21:36:34,718 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:36:34,740 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:36:40,518 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:40,539 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:36:40,539 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 73 [2018-09-26 21:36:40,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-26 21:36:40,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-26 21:36:40,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=849, Invalid=4701, Unknown=0, NotChecked=0, Total=5550 [2018-09-26 21:36:40,540 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 75 states. [2018-09-26 21:36:45,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:36:45,305 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-26 21:36:45,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-26 21:36:45,305 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 38 [2018-09-26 21:36:45,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:36:45,306 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:36:45,306 INFO L226 Difference]: Without dead ends: 40 [2018-09-26 21:36:45,307 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=849, Invalid=4701, Unknown=0, NotChecked=0, Total=5550 [2018-09-26 21:36:45,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-26 21:36:45,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-26 21:36:45,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-26 21:36:45,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-26 21:36:45,311 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-09-26 21:36:45,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:36:45,311 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-26 21:36:45,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-26 21:36:45,312 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-26 21:36:45,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-26 21:36:45,312 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:36:45,312 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1] [2018-09-26 21:36:45,312 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:36:45,312 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:36:45,313 INFO L82 PathProgramCache]: Analyzing trace with hash 765893217, now seen corresponding path program 37 times [2018-09-26 21:36:45,313 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:36:45,313 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:36:45,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:45,313 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:36:45,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:45,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:36:48,255 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:48,255 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:36:48,256 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:36:48,270 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:36:48,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:36:48,329 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:36:54,971 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:54,993 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:36:54,994 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 75 [2018-09-26 21:36:54,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-26 21:36:54,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-26 21:36:54,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=891, Invalid=4961, Unknown=0, NotChecked=0, Total=5852 [2018-09-26 21:36:54,995 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 77 states. [2018-09-26 21:36:59,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:36:59,761 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-09-26 21:36:59,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-26 21:36:59,762 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 39 [2018-09-26 21:36:59,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:36:59,763 INFO L225 Difference]: With dead ends: 42 [2018-09-26 21:36:59,763 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:36:59,763 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=891, Invalid=4961, Unknown=0, NotChecked=0, Total=5852 [2018-09-26 21:36:59,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:36:59,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-26 21:36:59,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-26 21:36:59,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-26 21:36:59,769 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-09-26 21:36:59,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:36:59,770 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-26 21:36:59,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-26 21:36:59,770 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-26 21:36:59,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-26 21:36:59,770 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:36:59,770 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1] [2018-09-26 21:36:59,770 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:36:59,771 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:36:59,771 INFO L82 PathProgramCache]: Analyzing trace with hash -2027114105, now seen corresponding path program 38 times [2018-09-26 21:36:59,771 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:36:59,771 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:36:59,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:59,772 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:36:59,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:59,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:37:02,883 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:37:02,884 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:37:02,884 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:37:02,891 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:37:02,953 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:37:02,953 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:37:02,955 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:37:09,697 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:37:09,717 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:37:09,717 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 77 [2018-09-26 21:37:09,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-26 21:37:09,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-26 21:37:09,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=934, Invalid=5228, Unknown=0, NotChecked=0, Total=6162 [2018-09-26 21:37:09,718 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 79 states. [2018-09-26 21:37:14,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:37:14,443 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-26 21:37:14,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-26 21:37:14,443 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 40 [2018-09-26 21:37:14,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:37:14,444 INFO L225 Difference]: With dead ends: 43 [2018-09-26 21:37:14,444 INFO L226 Difference]: Without dead ends: 42 [2018-09-26 21:37:14,445 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=934, Invalid=5228, Unknown=0, NotChecked=0, Total=6162 [2018-09-26 21:37:14,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-26 21:37:14,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-26 21:37:14,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-26 21:37:14,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-26 21:37:14,450 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-09-26 21:37:14,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:37:14,450 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-26 21:37:14,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-26 21:37:14,450 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-26 21:37:14,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-26 21:37:14,451 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:37:14,451 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1] [2018-09-26 21:37:14,451 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:37:14,451 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:37:14,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1583972129, now seen corresponding path program 39 times [2018-09-26 21:37:14,452 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:37:14,452 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:37:14,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:37:14,452 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:37:14,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:37:14,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:37:17,999 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:37:17,999 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:37:17,999 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:37:18,006 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:37:18,107 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-26 21:37:18,107 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:37:18,137 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:37:25,326 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:37:25,346 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:37:25,346 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 79 [2018-09-26 21:37:25,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-26 21:37:25,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-26 21:37:25,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=978, Invalid=5502, Unknown=0, NotChecked=0, Total=6480 [2018-09-26 21:37:25,347 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 81 states. [2018-09-26 21:37:29,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:37:29,925 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-09-26 21:37:29,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-26 21:37:29,925 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 41 [2018-09-26 21:37:29,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:37:29,926 INFO L225 Difference]: With dead ends: 44 [2018-09-26 21:37:29,926 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:37:29,927 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=978, Invalid=5502, Unknown=0, NotChecked=0, Total=6480 [2018-09-26 21:37:29,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:37:29,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-26 21:37:29,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-26 21:37:29,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-26 21:37:29,932 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-09-26 21:37:29,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:37:29,932 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-26 21:37:29,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-26 21:37:29,932 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-26 21:37:29,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-26 21:37:29,933 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:37:29,933 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1] [2018-09-26 21:37:29,933 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:37:29,933 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:37:29,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1858495687, now seen corresponding path program 40 times [2018-09-26 21:37:29,933 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:37:29,933 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:37:29,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:37:29,934 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:37:29,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:37:30,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:37:33,629 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:37:33,629 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:37:33,629 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:37:33,636 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:37:33,706 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:37:33,706 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:37:33,709 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:37:41,521 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:37:41,542 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:37:41,542 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 81 [2018-09-26 21:37:41,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-26 21:37:41,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-26 21:37:41,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1023, Invalid=5783, Unknown=0, NotChecked=0, Total=6806 [2018-09-26 21:37:41,543 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 83 states. [2018-09-26 21:37:45,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:37:45,960 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-26 21:37:45,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-26 21:37:45,960 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 42 [2018-09-26 21:37:45,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:37:45,961 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:37:45,961 INFO L226 Difference]: Without dead ends: 44 [2018-09-26 21:37:45,962 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=1023, Invalid=5783, Unknown=0, NotChecked=0, Total=6806 [2018-09-26 21:37:45,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-26 21:37:45,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-26 21:37:45,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-26 21:37:45,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-26 21:37:45,965 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-09-26 21:37:45,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:37:45,965 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-26 21:37:45,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-26 21:37:45,965 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-26 21:37:45,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-26 21:37:45,966 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:37:45,966 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1] [2018-09-26 21:37:45,966 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:37:45,966 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:37:45,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1778791393, now seen corresponding path program 41 times [2018-09-26 21:37:45,966 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:37:45,966 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:37:45,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:37:45,967 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:37:45,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:37:46,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:37:49,839 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:37:49,840 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:37:49,840 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:37:49,847 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:37:49,965 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-26 21:37:49,965 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:37:50,009 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:37:58,351 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:37:58,371 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:37:58,371 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 83 [2018-09-26 21:37:58,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-26 21:37:58,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-26 21:37:58,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1069, Invalid=6071, Unknown=0, NotChecked=0, Total=7140 [2018-09-26 21:37:58,372 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 85 states. [2018-09-26 21:38:03,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:38:03,368 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-09-26 21:38:03,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-26 21:38:03,369 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 43 [2018-09-26 21:38:03,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:38:03,370 INFO L225 Difference]: With dead ends: 46 [2018-09-26 21:38:03,370 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:38:03,370 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=1069, Invalid=6071, Unknown=0, NotChecked=0, Total=7140 [2018-09-26 21:38:03,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:38:03,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-26 21:38:03,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-26 21:38:03,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-26 21:38:03,376 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-09-26 21:38:03,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:38:03,377 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-26 21:38:03,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-26 21:38:03,377 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-26 21:38:03,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-26 21:38:03,377 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:38:03,377 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1] [2018-09-26 21:38:03,378 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:38:03,378 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:38:03,378 INFO L82 PathProgramCache]: Analyzing trace with hash -692041721, now seen corresponding path program 42 times [2018-09-26 21:38:03,378 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:38:03,378 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:38:03,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:38:03,379 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:38:03,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:38:03,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:38:07,655 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:38:07,655 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:38:07,655 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:38:07,663 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:38:07,796 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-26 21:38:07,796 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:38:07,845 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:38:16,828 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:38:16,849 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:38:16,849 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 85 [2018-09-26 21:38:16,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-26 21:38:16,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-26 21:38:16,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1116, Invalid=6366, Unknown=0, NotChecked=0, Total=7482 [2018-09-26 21:38:16,850 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 87 states. [2018-09-26 21:38:22,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:38:22,104 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-26 21:38:22,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-26 21:38:22,105 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 44 [2018-09-26 21:38:22,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:38:22,106 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:38:22,106 INFO L226 Difference]: Without dead ends: 46 [2018-09-26 21:38:22,106 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=1116, Invalid=6366, Unknown=0, NotChecked=0, Total=7482 [2018-09-26 21:38:22,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-26 21:38:22,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-26 21:38:22,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-26 21:38:22,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-26 21:38:22,111 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-09-26 21:38:22,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:38:22,111 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-26 21:38:22,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-26 21:38:22,112 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-26 21:38:22,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-26 21:38:22,112 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:38:22,112 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1] [2018-09-26 21:38:22,112 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:38:22,112 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:38:22,112 INFO L82 PathProgramCache]: Analyzing trace with hash 21543073, now seen corresponding path program 43 times [2018-09-26 21:38:22,112 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:38:22,113 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:38:22,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:38:22,113 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:38:22,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:38:22,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:38:26,536 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:38:26,536 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:38:26,537 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:38:26,544 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:38:26,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:38:26,627 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:38:36,239 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:38:36,260 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:38:36,260 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 87 [2018-09-26 21:38:36,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-26 21:38:36,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-26 21:38:36,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1164, Invalid=6668, Unknown=0, NotChecked=0, Total=7832 [2018-09-26 21:38:36,261 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 89 states. [2018-09-26 21:38:42,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:38:42,130 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-09-26 21:38:42,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-26 21:38:42,131 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 45 [2018-09-26 21:38:42,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:38:42,132 INFO L225 Difference]: With dead ends: 48 [2018-09-26 21:38:42,132 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:38:42,133 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=1164, Invalid=6668, Unknown=0, NotChecked=0, Total=7832 [2018-09-26 21:38:42,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:38:42,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-26 21:38:42,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-26 21:38:42,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-26 21:38:42,136 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-09-26 21:38:42,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:38:42,136 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-26 21:38:42,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-26 21:38:42,137 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-26 21:38:42,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-26 21:38:42,137 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:38:42,137 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1] [2018-09-26 21:38:42,137 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:38:42,137 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:38:42,138 INFO L82 PathProgramCache]: Analyzing trace with hash 667835207, now seen corresponding path program 44 times [2018-09-26 21:38:42,138 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:38:42,138 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:38:42,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:38:42,138 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:38:42,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:38:42,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-26 21:38:42,662 WARN L186 SmtUtils]: Removed 1 from assertion stack [2018-09-26 21:38:42,662 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-26 21:38:42,666 WARN L206 ceAbstractionStarter]: Timeout [2018-09-26 21:38:42,666 INFO L202 PluginConnector]: Adding new model GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.09 09:38:42 BoogieIcfgContainer [2018-09-26 21:38:42,666 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-26 21:38:42,667 INFO L168 Benchmark]: Toolchain (without parser) took 268422.02 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 40.9 MB). Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 13.5 MB). Peak memory consumption was 54.4 MB. Max. memory is 7.1 GB. [2018-09-26 21:38:42,669 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:38:42,669 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.49 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:38:42,669 INFO L168 Benchmark]: Boogie Preprocessor took 23.59 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:38:42,670 INFO L168 Benchmark]: RCFGBuilder took 215.67 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-26 21:38:42,670 INFO L168 Benchmark]: TraceAbstraction took 268133.19 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 40.9 MB). Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: -7.6 MB). Peak memory consumption was 33.2 MB. Max. memory is 7.1 GB. [2018-09-26 21:38:42,673 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 43.49 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 23.59 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 215.67 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 268133.19 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 40.9 MB). Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: -7.6 MB). Peak memory consumption was 33.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 21]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 21). Cancelled while BasicCegarLoop was analyzing trace of length 47 with TraceHistMax 44, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 9. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 5 locations, 1 error locations. TIMEOUT Result, 268.0s OverallTime, 45 OverallIterations, 44 TraceHistogramMax, 80.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 89 SDtfs, 2 SDslu, 1 SDs, 0 SdLazy, 35138 SolverSat, 946 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 75.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1979 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 1936 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13244 ImplicationChecksByTransitivity, 176.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=44, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 44 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 2.8s SatisfiabilityAnalysisTime, 181.6s InterpolantComputationTime, 2066 NumberOfCodeBlocks, 2066 NumberOfCodeBlocksAsserted, 339 NumberOfCheckSat, 1979 ConstructedInterpolants, 0 QuantifiedInterpolants, 569581 SizeOfPredicates, 43 NumberOfNonLiveVariables, 4085 ConjunctsInSsa, 2021 ConjunctsInUnsatCore, 87 InterpolantComputations, 1 PerfectInterpolantSequences, 0/28380 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/GeometricalCake.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-26_21-38-42-683.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/GeometricalCake.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-26_21-38-42-683.csv Completed graceful shutdown