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/20170304-DifficultPathPrograms/fragtest_simple.i_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-09-30 20:14:52,959 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 20:14:52,961 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 20:14:52,973 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 20:14:52,973 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 20:14:52,977 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 20:14:52,980 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 20:14:52,982 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 20:14:52,984 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 20:14:52,985 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 20:14:52,986 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-30 20:14:52,986 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-30 20:14:52,987 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-30 20:14:52,989 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-30 20:14:52,992 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-30 20:14:52,993 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-30 20:14:52,997 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-30 20:14:53,001 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-30 20:14:53,007 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-30 20:14:53,008 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-30 20:14:53,011 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-30 20:14:53,013 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-30 20:14:53,019 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-30 20:14:53,019 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-30 20:14:53,019 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-30 20:14:53,020 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-30 20:14:53,021 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-30 20:14:53,023 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-30 20:14:53,025 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-30 20:14:53,026 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-30 20:14:53,026 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-30 20:14:53,027 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-30 20:14:53,027 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-30 20:14:53,027 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-30 20:14:53,028 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-30 20:14:53,029 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-30 20:14:53,029 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 [2018-09-30 20:14:53,048 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 20:14:53,048 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 20:14:53,049 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 20:14:53,049 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 20:14:53,052 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 20:14:53,052 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 20:14:53,052 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 20:14:53,053 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 20:14:53,053 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 20:14:53,053 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 20:14:53,053 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 20:14:53,053 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 20:14:53,054 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 20:14:53,054 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 20:14:53,054 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 20:14:53,054 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 20:14:53,054 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 20:14:53,056 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 20:14:53,056 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 20:14:53,056 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 20:14:53,056 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 20:14:53,056 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 20:14:53,057 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:14:53,057 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 20:14:53,057 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 20:14:53,057 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 20:14:53,057 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 20:14:53,058 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 20:14:53,058 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 20:14:53,058 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 20:14:53,116 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 20:14:53,134 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 20:14:53,138 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 20:14:53,140 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 20:14:53,141 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 20:14:53,142 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/fragtest_simple.i_4.bpl [2018-09-30 20:14:53,143 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/fragtest_simple.i_4.bpl' [2018-09-30 20:14:53,216 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 20:14:53,219 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 20:14:53,220 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 20:14:53,220 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 20:14:53,221 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 20:14:53,241 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:14:53" (1/1) ... [2018-09-30 20:14:53,253 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:14:53" (1/1) ... [2018-09-30 20:14:53,260 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 20:14:53,260 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 20:14:53,261 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 20:14:53,261 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 20:14:53,271 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:14:53" (1/1) ... [2018-09-30 20:14:53,271 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:14:53" (1/1) ... [2018-09-30 20:14:53,272 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:14:53" (1/1) ... [2018-09-30 20:14:53,272 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:14:53" (1/1) ... [2018-09-30 20:14:53,276 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:14:53" (1/1) ... [2018-09-30 20:14:53,278 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:14:53" (1/1) ... [2018-09-30 20:14:53,280 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:14:53" (1/1) ... [2018-09-30 20:14:53,283 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 20:14:53,283 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 20:14:53,284 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 20:14:53,284 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 20:14:53,287 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:14:53" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:14:53,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-30 20:14:53,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-30 20:14:53,654 INFO L348 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-30 20:14:53,655 INFO L202 PluginConnector]: Adding new model fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:14:53 BoogieIcfgContainer [2018-09-30 20:14:53,655 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 20:14:53,656 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 20:14:53,656 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 20:14:53,660 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 20:14:53,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:14:53" (1/2) ... [2018-09-30 20:14:53,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c3c594d and model type fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 08:14:53, skipping insertion in model container [2018-09-30 20:14:53,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:14:53" (2/2) ... [2018-09-30 20:14:53,665 INFO L112 eAbstractionObserver]: Analyzing ICFG fragtest_simple.i_4.bpl [2018-09-30 20:14:53,675 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 20:14:53,685 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 20:14:53,740 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 20:14:53,740 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 20:14:53,741 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 20:14:53,741 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 20:14:53,741 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 20:14:53,741 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 20:14:53,742 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 20:14:53,742 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 20:14:53,742 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 20:14:53,759 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2018-09-30 20:14:53,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 20:14:53,766 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:14:53,767 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-09-30 20:14:53,768 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:14:53,774 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:14:53,775 INFO L82 PathProgramCache]: Analyzing trace with hash 889599113, now seen corresponding path program 1 times [2018-09-30 20:14:53,777 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:14:53,778 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:14:53,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:53,836 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:14:53,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:53,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:54,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:54,043 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 20:14:54,043 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-30 20:14:54,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 20:14:54,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 20:14:54,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-30 20:14:54,070 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 4 states. [2018-09-30 20:14:54,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:14:54,238 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2018-09-30 20:14:54,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 20:14:54,240 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-30 20:14:54,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:14:54,251 INFO L225 Difference]: With dead ends: 14 [2018-09-30 20:14:54,251 INFO L226 Difference]: Without dead ends: 10 [2018-09-30 20:14:54,255 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 [2018-09-30 20:14:54,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-30 20:14:54,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2018-09-30 20:14:54,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-30 20:14:54,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-09-30 20:14:54,291 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2018-09-30 20:14:54,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:14:54,291 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-09-30 20:14:54,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 20:14:54,292 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-09-30 20:14:54,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 20:14:54,292 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:14:54,293 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-09-30 20:14:54,293 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:14:54,293 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:14:54,293 INFO L82 PathProgramCache]: Analyzing trace with hash 206308035, now seen corresponding path program 1 times [2018-09-30 20:14:54,294 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:14:54,294 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:14:54,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:54,295 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:14:54,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:54,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:54,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:54,356 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 20:14:54,356 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-30 20:14:54,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 20:14:54,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 20:14:54,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-30 20:14:54,359 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 4 states. [2018-09-30 20:14:54,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:14:54,422 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2018-09-30 20:14:54,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 20:14:54,423 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-09-30 20:14:54,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:14:54,424 INFO L225 Difference]: With dead ends: 17 [2018-09-30 20:14:54,424 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 20:14:54,426 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-09-30 20:14:54,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 20:14:54,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-30 20:14:54,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 20:14:54,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-09-30 20:14:54,432 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2018-09-30 20:14:54,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:14:54,433 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-09-30 20:14:54,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 20:14:54,433 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-09-30 20:14:54,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 20:14:54,433 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:14:54,434 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-09-30 20:14:54,434 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:14:54,434 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:14:54,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1531170369, now seen corresponding path program 1 times [2018-09-30 20:14:54,435 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:14:54,436 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:14:54,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:54,437 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:14:54,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:54,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:54,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:54,610 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:14:54,610 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:14:54,622 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:14:54,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:54,669 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:14:54,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:55,023 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:14:55,023 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2018-09-30 20:14:55,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:14:55,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:14:55,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:14:55,027 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 9 states. [2018-09-30 20:14:55,407 WARN L178 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2018-09-30 20:14:55,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:14:55,528 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2018-09-30 20:14:55,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:14:55,529 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 10 [2018-09-30 20:14:55,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:14:55,530 INFO L225 Difference]: With dead ends: 21 [2018-09-30 20:14:55,530 INFO L226 Difference]: Without dead ends: 15 [2018-09-30 20:14:55,531 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2018-09-30 20:14:55,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-30 20:14:55,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-30 20:14:55,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-30 20:14:55,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-09-30 20:14:55,537 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2018-09-30 20:14:55,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:14:55,538 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-09-30 20:14:55,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:14:55,538 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-09-30 20:14:55,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 20:14:55,539 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:14:55,539 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2018-09-30 20:14:55,540 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:14:55,540 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:14:55,540 INFO L82 PathProgramCache]: Analyzing trace with hash -587211915, now seen corresponding path program 2 times [2018-09-30 20:14:55,540 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:14:55,541 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:14:55,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:55,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:14:55,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:55,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:55,742 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:55,743 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:14:55,743 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:14:55,755 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:14:55,783 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:14:55,783 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:14:55,785 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:14:56,194 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:56,215 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:14:56,215 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2018-09-30 20:14:56,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 20:14:56,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 20:14:56,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2018-09-30 20:14:56,217 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 12 states. [2018-09-30 20:14:56,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:14:56,653 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2018-09-30 20:14:56,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 20:14:56,655 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 14 [2018-09-30 20:14:56,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:14:56,656 INFO L225 Difference]: With dead ends: 27 [2018-09-30 20:14:56,656 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 20:14:56,657 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2018-09-30 20:14:56,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 20:14:56,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-30 20:14:56,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 20:14:56,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-09-30 20:14:56,662 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2018-09-30 20:14:56,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:14:56,663 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-09-30 20:14:56,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 20:14:56,663 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-09-30 20:14:56,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 20:14:56,664 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:14:56,664 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2018-09-30 20:14:56,664 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:14:56,665 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:14:56,665 INFO L82 PathProgramCache]: Analyzing trace with hash 70717867, now seen corresponding path program 3 times [2018-09-30 20:14:56,665 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:14:56,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:14:56,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:56,666 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:14:56,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:56,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:56,768 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:56,768 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:14:56,768 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:14:56,780 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:14:56,805 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-30 20:14:56,805 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:14:56,807 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:14:56,901 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:56,923 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:14:56,923 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2018-09-30 20:14:56,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 20:14:56,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 20:14:56,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2018-09-30 20:14:56,924 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 12 states. [2018-09-30 20:14:57,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:14:57,099 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2018-09-30 20:14:57,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:14:57,100 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2018-09-30 20:14:57,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:14:57,101 INFO L225 Difference]: With dead ends: 31 [2018-09-30 20:14:57,101 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 20:14:57,102 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2018-09-30 20:14:57,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 20:14:57,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-30 20:14:57,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-30 20:14:57,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-09-30 20:14:57,107 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2018-09-30 20:14:57,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:14:57,108 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-09-30 20:14:57,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 20:14:57,108 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-09-30 20:14:57,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 20:14:57,109 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:14:57,109 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1] [2018-09-30 20:14:57,109 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:14:57,110 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:14:57,110 INFO L82 PathProgramCache]: Analyzing trace with hash 2045097383, now seen corresponding path program 4 times [2018-09-30 20:14:57,110 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:14:57,110 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:14:57,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:57,111 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:14:57,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:57,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:57,286 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:57,287 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:14:57,287 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:14:57,295 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:14:57,318 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:14:57,319 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:14:57,321 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:14:57,375 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:57,398 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:14:57,399 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2018-09-30 20:14:57,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:14:57,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:14:57,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:14:57,400 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 10 states. [2018-09-30 20:14:57,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:14:57,606 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2018-09-30 20:14:57,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 20:14:57,606 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2018-09-30 20:14:57,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:14:57,607 INFO L225 Difference]: With dead ends: 28 [2018-09-30 20:14:57,607 INFO L226 Difference]: Without dead ends: 26 [2018-09-30 20:14:57,608 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2018-09-30 20:14:57,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-30 20:14:57,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2018-09-30 20:14:57,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 20:14:57,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-09-30 20:14:57,615 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 20 [2018-09-30 20:14:57,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:14:57,615 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-09-30 20:14:57,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:14:57,615 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-09-30 20:14:57,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 20:14:57,616 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:14:57,616 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1] [2018-09-30 20:14:57,617 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:14:57,617 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:14:57,617 INFO L82 PathProgramCache]: Analyzing trace with hash 37022875, now seen corresponding path program 5 times [2018-09-30 20:14:57,617 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:14:57,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:14:57,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:57,619 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:14:57,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:57,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:57,809 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:57,810 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:14:57,810 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:14:57,823 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:14:57,869 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 20:14:57,870 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:14:57,872 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:14:58,005 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:58,026 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:14:58,026 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2018-09-30 20:14:58,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 20:14:58,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 20:14:58,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2018-09-30 20:14:58,028 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 17 states. [2018-09-30 20:14:58,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:14:58,173 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2018-09-30 20:14:58,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:14:58,174 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 24 [2018-09-30 20:14:58,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:14:58,175 INFO L225 Difference]: With dead ends: 41 [2018-09-30 20:14:58,175 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 20:14:58,175 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2018-09-30 20:14:58,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 20:14:58,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-30 20:14:58,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-30 20:14:58,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-09-30 20:14:58,182 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2018-09-30 20:14:58,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:14:58,182 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-09-30 20:14:58,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 20:14:58,182 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-09-30 20:14:58,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 20:14:58,183 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:14:58,183 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1] [2018-09-30 20:14:58,183 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:14:58,184 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:14:58,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1480612969, now seen corresponding path program 6 times [2018-09-30 20:14:58,184 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:14:58,184 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:14:58,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:58,185 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:14:58,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:58,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:58,339 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:58,340 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:14:58,340 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:14:58,347 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:14:58,375 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-09-30 20:14:58,376 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:14:58,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:14:58,507 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:58,529 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:14:58,529 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2018-09-30 20:14:58,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 20:14:58,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 20:14:58,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2018-09-30 20:14:58,531 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 18 states. [2018-09-30 20:14:58,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:14:58,706 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2018-09-30 20:14:58,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 20:14:58,706 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2018-09-30 20:14:58,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:14:58,707 INFO L225 Difference]: With dead ends: 43 [2018-09-30 20:14:58,707 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 20:14:58,708 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2018-09-30 20:14:58,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 20:14:58,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-30 20:14:58,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-30 20:14:58,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-09-30 20:14:58,714 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2018-09-30 20:14:58,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:14:58,715 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-09-30 20:14:58,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 20:14:58,715 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-09-30 20:14:58,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-30 20:14:58,716 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:14:58,716 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1] [2018-09-30 20:14:58,716 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:14:58,716 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:14:58,717 INFO L82 PathProgramCache]: Analyzing trace with hash 360221587, now seen corresponding path program 7 times [2018-09-30 20:14:58,717 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:14:58,717 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:14:58,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:58,718 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:14:58,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:58,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:58,900 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:58,900 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:14:58,900 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:14:58,909 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:14:58,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:58,950 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:14:59,096 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:59,132 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:14:59,132 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2018-09-30 20:14:59,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 20:14:59,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 20:14:59,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2018-09-30 20:14:59,133 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 12 states. [2018-09-30 20:14:59,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:14:59,375 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2018-09-30 20:14:59,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 20:14:59,377 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2018-09-30 20:14:59,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:14:59,378 INFO L225 Difference]: With dead ends: 36 [2018-09-30 20:14:59,378 INFO L226 Difference]: Without dead ends: 34 [2018-09-30 20:14:59,379 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2018-09-30 20:14:59,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-30 20:14:59,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2018-09-30 20:14:59,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-30 20:14:59,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-09-30 20:14:59,386 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 28 [2018-09-30 20:14:59,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:14:59,386 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-09-30 20:14:59,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 20:14:59,388 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-09-30 20:14:59,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 20:14:59,389 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:14:59,389 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1] [2018-09-30 20:14:59,390 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:14:59,390 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:14:59,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1263725703, now seen corresponding path program 8 times [2018-09-30 20:14:59,390 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:14:59,390 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:14:59,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:59,391 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:14:59,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:59,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:59,727 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 56 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:59,727 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:14:59,727 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:14:59,742 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:14:59,781 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:14:59,781 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:14:59,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:15:00,185 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 54 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-30 20:15:00,207 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:15:00,207 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 21 [2018-09-30 20:15:00,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 20:15:00,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 20:15:00,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2018-09-30 20:15:00,209 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 22 states. [2018-09-30 20:15:00,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:15:00,736 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2018-09-30 20:15:00,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 20:15:00,736 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 32 [2018-09-30 20:15:00,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:15:00,737 INFO L225 Difference]: With dead ends: 53 [2018-09-30 20:15:00,737 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 20:15:00,738 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2018-09-30 20:15:00,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 20:15:00,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-30 20:15:00,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 20:15:00,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-09-30 20:15:00,744 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2018-09-30 20:15:00,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:15:00,744 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-09-30 20:15:00,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 20:15:00,744 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-09-30 20:15:00,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 20:15:00,745 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:15:00,745 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1] [2018-09-30 20:15:00,746 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:15:00,746 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:15:00,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1629808515, now seen corresponding path program 9 times [2018-09-30 20:15:00,746 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:15:00,746 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:15:00,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:00,747 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:15:00,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:00,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:15:00,973 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:00,973 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:15:00,974 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:15:00,982 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:15:01,020 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 20:15:01,021 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:15:01,025 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:15:01,444 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:01,467 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:15:01,468 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2018-09-30 20:15:01,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 20:15:01,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 20:15:01,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2018-09-30 20:15:01,469 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 24 states. [2018-09-30 20:15:01,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:15:01,713 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2018-09-30 20:15:01,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 20:15:01,714 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 34 [2018-09-30 20:15:01,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:15:01,715 INFO L225 Difference]: With dead ends: 55 [2018-09-30 20:15:01,715 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 20:15:01,716 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=262, Invalid=668, Unknown=0, NotChecked=0, Total=930 [2018-09-30 20:15:01,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 20:15:01,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-30 20:15:01,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-30 20:15:01,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-09-30 20:15:01,723 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2018-09-30 20:15:01,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:15:01,724 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-09-30 20:15:01,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 20:15:01,724 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-09-30 20:15:01,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-30 20:15:01,725 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:15:01,725 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1] [2018-09-30 20:15:01,725 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:15:01,726 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:15:01,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1248072575, now seen corresponding path program 10 times [2018-09-30 20:15:01,726 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:15:01,726 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:15:01,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:01,727 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:15:01,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:01,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:15:01,939 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:01,940 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:15:01,940 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:15:01,947 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:15:01,979 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:15:01,979 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:15:01,981 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:15:02,025 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:02,047 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:15:02,048 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2018-09-30 20:15:02,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 20:15:02,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 20:15:02,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2018-09-30 20:15:02,048 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 14 states. [2018-09-30 20:15:02,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:15:02,217 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2018-09-30 20:15:02,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 20:15:02,218 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2018-09-30 20:15:02,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:15:02,219 INFO L225 Difference]: With dead ends: 44 [2018-09-30 20:15:02,219 INFO L226 Difference]: Without dead ends: 42 [2018-09-30 20:15:02,220 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=317, Unknown=0, NotChecked=0, Total=506 [2018-09-30 20:15:02,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-30 20:15:02,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2018-09-30 20:15:02,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-30 20:15:02,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-09-30 20:15:02,228 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 36 [2018-09-30 20:15:02,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:15:02,228 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-09-30 20:15:02,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 20:15:02,228 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-09-30 20:15:02,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-30 20:15:02,229 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:15:02,229 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 1, 1, 1, 1] [2018-09-30 20:15:02,229 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:15:02,230 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:15:02,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1910464909, now seen corresponding path program 11 times [2018-09-30 20:15:02,230 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:15:02,230 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:15:02,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:02,232 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:15:02,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:02,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:15:02,483 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:02,483 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:15:02,483 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:15:02,491 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:15:02,530 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-30 20:15:02,530 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:15:02,534 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:15:02,924 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:02,946 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:15:02,946 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2018-09-30 20:15:02,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 20:15:02,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 20:15:02,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=604, Unknown=0, NotChecked=0, Total=812 [2018-09-30 20:15:02,947 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 29 states. [2018-09-30 20:15:03,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:15:03,270 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2018-09-30 20:15:03,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 20:15:03,271 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 40 [2018-09-30 20:15:03,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:15:03,271 INFO L225 Difference]: With dead ends: 65 [2018-09-30 20:15:03,272 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 20:15:03,273 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=360, Invalid=972, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 20:15:03,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 20:15:03,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-30 20:15:03,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-30 20:15:03,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-09-30 20:15:03,279 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2018-09-30 20:15:03,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:15:03,279 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-09-30 20:15:03,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 20:15:03,279 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-09-30 20:15:03,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 20:15:03,280 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:15:03,280 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1] [2018-09-30 20:15:03,281 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:15:03,281 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:15:03,281 INFO L82 PathProgramCache]: Analyzing trace with hash 179690863, now seen corresponding path program 12 times [2018-09-30 20:15:03,281 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:15:03,281 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:15:03,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:03,282 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:15:03,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:03,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:15:04,059 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:04,060 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:15:04,060 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:15:04,069 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:15:04,182 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-30 20:15:04,182 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:15:04,184 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:15:04,412 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:04,433 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:15:04,433 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 29 [2018-09-30 20:15:04,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 20:15:04,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 20:15:04,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2018-09-30 20:15:04,435 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 30 states. [2018-09-30 20:15:04,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:15:04,905 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2018-09-30 20:15:04,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 20:15:04,905 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 42 [2018-09-30 20:15:04,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:15:04,906 INFO L225 Difference]: With dead ends: 67 [2018-09-30 20:15:04,906 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 20:15:04,907 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=408, Invalid=1074, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 20:15:04,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 20:15:04,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-30 20:15:04,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-30 20:15:04,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-09-30 20:15:04,913 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2018-09-30 20:15:04,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:15:04,914 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-09-30 20:15:04,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 20:15:04,914 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-09-30 20:15:04,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 20:15:04,915 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:15:04,915 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1] [2018-09-30 20:15:04,915 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:15:04,915 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:15:04,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1225306773, now seen corresponding path program 13 times [2018-09-30 20:15:04,916 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:15:04,916 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:15:04,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:04,916 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:15:04,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:04,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:15:05,177 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:05,177 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:15:05,178 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:15:05,185 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:15:05,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:15:05,223 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:15:05,253 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:05,275 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:15:05,275 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2018-09-30 20:15:05,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 20:15:05,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 20:15:05,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2018-09-30 20:15:05,276 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 16 states. [2018-09-30 20:15:05,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:15:05,464 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2018-09-30 20:15:05,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 20:15:05,465 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2018-09-30 20:15:05,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:15:05,466 INFO L225 Difference]: With dead ends: 52 [2018-09-30 20:15:05,466 INFO L226 Difference]: Without dead ends: 50 [2018-09-30 20:15:05,467 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=262, Invalid=440, Unknown=0, NotChecked=0, Total=702 [2018-09-30 20:15:05,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-30 20:15:05,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2018-09-30 20:15:05,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-30 20:15:05,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2018-09-30 20:15:05,477 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 44 [2018-09-30 20:15:05,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:15:05,477 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2018-09-30 20:15:05,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 20:15:05,477 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2018-09-30 20:15:05,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-30 20:15:05,478 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:15:05,478 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 1, 1, 1, 1] [2018-09-30 20:15:05,479 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:15:05,479 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:15:05,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1452473761, now seen corresponding path program 14 times [2018-09-30 20:15:05,479 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:15:05,479 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:15:05,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:05,480 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:15:05,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:05,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:15:06,044 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 132 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:06,045 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:15:06,045 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:15:06,055 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:15:06,109 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:15:06,110 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:15:06,113 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:15:07,632 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 130 proven. 110 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-30 20:15:07,656 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:15:07,656 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 33 [2018-09-30 20:15:07,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 20:15:07,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 20:15:07,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=847, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 20:15:07,657 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 34 states. [2018-09-30 20:15:08,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:15:08,645 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2018-09-30 20:15:08,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 20:15:08,645 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 48 [2018-09-30 20:15:08,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:15:08,646 INFO L225 Difference]: With dead ends: 77 [2018-09-30 20:15:08,646 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 20:15:08,647 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=505, Invalid=1387, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 20:15:08,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 20:15:08,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-30 20:15:08,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-30 20:15:08,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-09-30 20:15:08,654 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2018-09-30 20:15:08,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:15:08,654 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-09-30 20:15:08,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 20:15:08,655 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-09-30 20:15:08,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-30 20:15:08,655 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:15:08,655 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1] [2018-09-30 20:15:08,657 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:15:08,658 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:15:08,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1195476315, now seen corresponding path program 15 times [2018-09-30 20:15:08,658 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:15:08,658 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:15:08,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:08,659 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:15:08,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:08,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:15:09,003 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 132 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:09,003 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:15:09,003 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:15:09,010 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:15:09,063 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-30 20:15:09,063 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:15:09,068 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:15:09,538 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 132 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:09,560 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:15:09,560 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 35 [2018-09-30 20:15:09,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 20:15:09,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 20:15:09,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 20:15:09,562 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 36 states. [2018-09-30 20:15:10,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:15:10,001 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2018-09-30 20:15:10,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 20:15:10,001 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 50 [2018-09-30 20:15:10,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:15:10,002 INFO L225 Difference]: With dead ends: 79 [2018-09-30 20:15:10,002 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 20:15:10,003 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=586, Invalid=1576, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 20:15:10,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 20:15:10,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-30 20:15:10,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-30 20:15:10,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2018-09-30 20:15:10,011 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2018-09-30 20:15:10,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:15:10,011 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2018-09-30 20:15:10,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 20:15:10,011 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2018-09-30 20:15:10,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-30 20:15:10,012 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:15:10,012 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 1, 1, 1, 1] [2018-09-30 20:15:10,013 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:15:10,013 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:15:10,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1040107177, now seen corresponding path program 16 times [2018-09-30 20:15:10,013 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:15:10,013 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:15:10,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:10,014 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:15:10,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:10,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:15:10,260 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:10,261 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:15:10,261 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:15:10,268 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:15:10,306 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:15:10,306 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:15:10,310 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:15:10,357 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:10,378 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:15:10,378 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2018-09-30 20:15:10,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 20:15:10,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 20:15:10,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-09-30 20:15:10,379 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 18 states. [2018-09-30 20:15:10,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:15:10,662 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2018-09-30 20:15:10,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 20:15:10,662 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2018-09-30 20:15:10,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:15:10,663 INFO L225 Difference]: With dead ends: 60 [2018-09-30 20:15:10,663 INFO L226 Difference]: Without dead ends: 58 [2018-09-30 20:15:10,664 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=347, Invalid=583, Unknown=0, NotChecked=0, Total=930 [2018-09-30 20:15:10,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-30 20:15:10,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2018-09-30 20:15:10,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-30 20:15:10,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-09-30 20:15:10,672 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 52 [2018-09-30 20:15:10,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:15:10,672 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-09-30 20:15:10,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 20:15:10,672 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-09-30 20:15:10,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-30 20:15:10,673 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:15:10,673 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 1, 1, 1, 1] [2018-09-30 20:15:10,673 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:15:10,673 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:15:10,673 INFO L82 PathProgramCache]: Analyzing trace with hash 75962443, now seen corresponding path program 17 times [2018-09-30 20:15:10,673 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:15:10,674 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:15:10,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:10,674 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:15:10,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:10,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:15:11,105 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 182 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:11,106 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:15:11,106 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:15:11,113 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:15:11,219 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2018-09-30 20:15:11,219 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:15:11,223 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:15:11,729 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 182 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:11,749 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:15:11,750 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 40 [2018-09-30 20:15:11,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 20:15:11,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 20:15:11,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=1236, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 20:15:11,751 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 41 states. [2018-09-30 20:15:12,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:15:12,017 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2018-09-30 20:15:12,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 20:15:12,017 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 56 [2018-09-30 20:15:12,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:15:12,018 INFO L225 Difference]: With dead ends: 89 [2018-09-30 20:15:12,018 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 20:15:12,019 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=728, Invalid=2028, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 20:15:12,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 20:15:12,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-30 20:15:12,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-30 20:15:12,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2018-09-30 20:15:12,026 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2018-09-30 20:15:12,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:15:12,027 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2018-09-30 20:15:12,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 20:15:12,027 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2018-09-30 20:15:12,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-30 20:15:12,028 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:15:12,028 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1] [2018-09-30 20:15:12,028 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:15:12,028 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:15:12,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1108795207, now seen corresponding path program 18 times [2018-09-30 20:15:12,028 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:15:12,029 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:15:12,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:12,029 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:15:12,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:12,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:15:12,689 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 182 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:12,690 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:15:12,690 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:15:12,698 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:15:12,777 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-09-30 20:15:12,777 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:15:12,780 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:15:13,352 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 182 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:13,372 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:15:13,372 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 41 [2018-09-30 20:15:13,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 20:15:13,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 20:15:13,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1303, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 20:15:13,374 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 42 states. [2018-09-30 20:15:13,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:15:13,678 INFO L93 Difference]: Finished difference Result 91 states and 93 transitions. [2018-09-30 20:15:13,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 20:15:13,679 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 58 [2018-09-30 20:15:13,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:15:13,680 INFO L225 Difference]: With dead ends: 91 [2018-09-30 20:15:13,680 INFO L226 Difference]: Without dead ends: 61 [2018-09-30 20:15:13,681 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=796, Invalid=2174, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 20:15:13,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-30 20:15:13,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-30 20:15:13,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-30 20:15:13,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2018-09-30 20:15:13,688 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 58 [2018-09-30 20:15:13,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:15:13,688 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2018-09-30 20:15:13,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 20:15:13,688 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2018-09-30 20:15:13,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-30 20:15:13,689 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:15:13,689 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 1, 1, 1, 1] [2018-09-30 20:15:13,689 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:15:13,690 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:15:13,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1523636035, now seen corresponding path program 19 times [2018-09-30 20:15:13,690 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:15:13,690 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:15:13,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:13,691 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:15:13,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:13,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:15:15,076 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:15,076 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:15:15,076 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:15:15,085 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:15:15,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:15:15,135 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:15:15,156 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:15,177 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:15:15,177 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2018-09-30 20:15:15,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 20:15:15,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 20:15:15,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2018-09-30 20:15:15,178 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 20 states. [2018-09-30 20:15:15,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:15:15,464 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2018-09-30 20:15:15,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 20:15:15,465 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 60 [2018-09-30 20:15:15,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:15:15,465 INFO L225 Difference]: With dead ends: 68 [2018-09-30 20:15:15,466 INFO L226 Difference]: Without dead ends: 66 [2018-09-30 20:15:15,467 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=444, Invalid=746, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 20:15:15,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-30 20:15:15,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2018-09-30 20:15:15,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-30 20:15:15,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2018-09-30 20:15:15,475 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 60 [2018-09-30 20:15:15,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:15:15,476 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2018-09-30 20:15:15,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 20:15:15,476 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2018-09-30 20:15:15,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-30 20:15:15,476 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:15:15,477 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 14, 1, 1, 1, 1] [2018-09-30 20:15:15,477 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:15:15,477 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:15:15,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1329455159, now seen corresponding path program 20 times [2018-09-30 20:15:15,477 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:15:15,477 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:15:15,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:15,478 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:15:15,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:15,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:15:15,938 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 240 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:15,938 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:15:15,938 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:15:15,946 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:15:15,994 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:15:15,994 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:15:15,996 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:15:16,397 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 238 proven. 210 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-30 20:15:16,419 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:15:16,419 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 45 [2018-09-30 20:15:16,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 20:15:16,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 20:15:16,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=495, Invalid=1575, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 20:15:16,421 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 46 states. [2018-09-30 20:15:16,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:15:16,894 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2018-09-30 20:15:16,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 20:15:16,895 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 64 [2018-09-30 20:15:16,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:15:16,896 INFO L225 Difference]: With dead ends: 101 [2018-09-30 20:15:16,896 INFO L226 Difference]: Without dead ends: 67 [2018-09-30 20:15:16,898 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=929, Invalid=2611, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 20:15:16,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-30 20:15:16,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-30 20:15:16,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-30 20:15:16,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2018-09-30 20:15:16,903 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2018-09-30 20:15:16,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:15:16,903 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2018-09-30 20:15:16,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 20:15:16,903 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2018-09-30 20:15:16,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-30 20:15:16,904 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:15:16,904 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1] [2018-09-30 20:15:16,904 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:15:16,904 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:15:16,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1862593331, now seen corresponding path program 21 times [2018-09-30 20:15:16,905 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:15:16,905 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:15:16,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:16,905 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:15:16,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:16,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:15:17,757 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 240 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:17,757 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:15:17,757 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:15:17,766 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:15:17,827 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-30 20:15:17,827 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:15:17,829 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:15:18,302 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 240 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:18,323 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:15:18,323 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 47 [2018-09-30 20:15:18,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 20:15:18,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 20:15:18,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=543, Invalid=1713, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 20:15:18,325 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 48 states. [2018-09-30 20:15:18,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:15:18,697 INFO L93 Difference]: Finished difference Result 103 states and 105 transitions. [2018-09-30 20:15:18,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 20:15:18,697 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 66 [2018-09-30 20:15:18,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:15:18,698 INFO L225 Difference]: With dead ends: 103 [2018-09-30 20:15:18,699 INFO L226 Difference]: Without dead ends: 69 [2018-09-30 20:15:18,700 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1038, Invalid=2868, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 20:15:18,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-30 20:15:18,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-30 20:15:18,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-30 20:15:18,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-09-30 20:15:18,708 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2018-09-30 20:15:18,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:15:18,708 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-09-30 20:15:18,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 20:15:18,708 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-09-30 20:15:18,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-30 20:15:18,709 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:15:18,709 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 15, 1, 1, 1, 1] [2018-09-30 20:15:18,709 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:15:18,709 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:15:18,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1187698897, now seen corresponding path program 22 times [2018-09-30 20:15:18,710 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:15:18,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:15:18,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:18,711 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:15:18,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:18,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:15:19,693 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:19,693 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:15:19,693 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:15:19,705 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:15:19,753 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:15:19,753 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:15:19,755 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:15:19,791 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:19,815 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:15:19,815 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2018-09-30 20:15:19,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 20:15:19,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 20:15:19,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2018-09-30 20:15:19,816 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 22 states. [2018-09-30 20:15:20,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:15:20,308 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2018-09-30 20:15:20,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 20:15:20,309 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 68 [2018-09-30 20:15:20,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:15:20,310 INFO L225 Difference]: With dead ends: 76 [2018-09-30 20:15:20,310 INFO L226 Difference]: Without dead ends: 74 [2018-09-30 20:15:20,311 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=553, Invalid=929, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 20:15:20,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-30 20:15:20,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2018-09-30 20:15:20,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-30 20:15:20,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2018-09-30 20:15:20,319 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 68 [2018-09-30 20:15:20,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:15:20,319 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2018-09-30 20:15:20,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 20:15:20,319 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2018-09-30 20:15:20,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-30 20:15:20,320 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:15:20,320 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 16, 1, 1, 1, 1] [2018-09-30 20:15:20,320 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:15:20,320 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:15:20,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1105222179, now seen corresponding path program 23 times [2018-09-30 20:15:20,320 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:15:20,320 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:15:20,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:20,321 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:15:20,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:20,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:15:20,840 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 306 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:20,841 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:15:20,841 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:15:20,848 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:15:20,915 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-30 20:15:20,915 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:15:20,918 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:15:21,435 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 306 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:21,456 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:15:21,456 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 52 [2018-09-30 20:15:21,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 20:15:21,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 20:15:21,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=664, Invalid=2092, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 20:15:21,458 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 53 states. [2018-09-30 20:15:22,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:15:22,185 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2018-09-30 20:15:22,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 20:15:22,190 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 72 [2018-09-30 20:15:22,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:15:22,191 INFO L225 Difference]: With dead ends: 113 [2018-09-30 20:15:22,191 INFO L226 Difference]: Without dead ends: 75 [2018-09-30 20:15:22,193 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1224, Invalid=3468, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 20:15:22,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-30 20:15:22,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-30 20:15:22,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-30 20:15:22,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-09-30 20:15:22,201 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 72 [2018-09-30 20:15:22,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:15:22,201 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-09-30 20:15:22,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 20:15:22,202 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-09-30 20:15:22,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-30 20:15:22,202 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:15:22,202 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1] [2018-09-30 20:15:22,203 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:15:22,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:15:22,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1247455519, now seen corresponding path program 24 times [2018-09-30 20:15:22,203 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:15:22,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:15:22,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:22,204 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:15:22,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:22,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:15:22,787 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 306 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:22,788 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:15:22,788 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:15:22,795 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:15:22,891 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2018-09-30 20:15:22,891 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:15:22,894 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:15:23,443 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 306 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:23,465 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:15:23,465 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 53 [2018-09-30 20:15:23,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 20:15:23,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 20:15:23,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=683, Invalid=2179, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 20:15:23,467 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 54 states. [2018-09-30 20:15:23,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:15:23,954 INFO L93 Difference]: Finished difference Result 115 states and 117 transitions. [2018-09-30 20:15:23,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 20:15:23,954 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 74 [2018-09-30 20:15:23,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:15:23,955 INFO L225 Difference]: With dead ends: 115 [2018-09-30 20:15:23,955 INFO L226 Difference]: Without dead ends: 77 [2018-09-30 20:15:23,957 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 954 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1312, Invalid=3658, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 20:15:23,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-30 20:15:23,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-30 20:15:23,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-30 20:15:23,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2018-09-30 20:15:23,965 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2018-09-30 20:15:23,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:15:23,965 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2018-09-30 20:15:23,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 20:15:23,966 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2018-09-30 20:15:23,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-30 20:15:23,966 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:15:23,966 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 17, 1, 1, 1, 1] [2018-09-30 20:15:23,967 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:15:23,967 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:15:23,967 INFO L82 PathProgramCache]: Analyzing trace with hash 494741787, now seen corresponding path program 25 times [2018-09-30 20:15:23,967 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:15:23,967 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:15:23,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:23,968 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:15:23,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:23,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:15:24,418 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:24,419 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:15:24,419 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 [2018-09-30 20:15:24,426 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:15:24,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:15:24,497 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:15:24,556 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:24,576 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:15:24,577 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2018-09-30 20:15:24,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 20:15:24,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 20:15:24,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2018-09-30 20:15:24,578 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 24 states. [2018-09-30 20:15:25,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:15:25,044 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2018-09-30 20:15:25,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 20:15:25,044 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 76 [2018-09-30 20:15:25,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:15:25,046 INFO L225 Difference]: With dead ends: 84 [2018-09-30 20:15:25,046 INFO L226 Difference]: Without dead ends: 82 [2018-09-30 20:15:25,047 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=674, Invalid=1132, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 20:15:25,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-30 20:15:25,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2018-09-30 20:15:25,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-30 20:15:25,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-09-30 20:15:25,055 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 76 [2018-09-30 20:15:25,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:15:25,055 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-09-30 20:15:25,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 20:15:25,056 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-09-30 20:15:25,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-30 20:15:25,056 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:15:25,056 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 18, 1, 1, 1, 1] [2018-09-30 20:15:25,057 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:15:25,057 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:15:25,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1564313103, now seen corresponding path program 26 times [2018-09-30 20:15:25,057 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:15:25,057 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:15:25,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:25,058 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:15:25,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:25,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:15:25,841 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 380 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:25,842 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:15:25,842 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:15:25,850 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:15:25,925 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:15:25,926 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:15:25,929 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:15:26,640 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 378 proven. 342 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-30 20:15:26,662 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:15:26,662 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 57 [2018-09-30 20:15:26,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 20:15:26,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 20:15:26,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=779, Invalid=2527, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 20:15:26,663 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 58 states. [2018-09-30 20:15:27,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:15:27,326 INFO L93 Difference]: Finished difference Result 125 states and 127 transitions. [2018-09-30 20:15:27,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 20:15:27,326 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 80 [2018-09-30 20:15:27,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:15:27,327 INFO L225 Difference]: With dead ends: 125 [2018-09-30 20:15:27,327 INFO L226 Difference]: Without dead ends: 83 [2018-09-30 20:15:27,328 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1481, Invalid=4219, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 20:15:27,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-30 20:15:27,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-30 20:15:27,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-30 20:15:27,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2018-09-30 20:15:27,337 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2018-09-30 20:15:27,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:15:27,338 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2018-09-30 20:15:27,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 20:15:27,338 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2018-09-30 20:15:27,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-30 20:15:27,338 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:15:27,338 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1] [2018-09-30 20:15:27,338 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:15:27,339 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:15:27,339 INFO L82 PathProgramCache]: Analyzing trace with hash 417798411, now seen corresponding path program 27 times [2018-09-30 20:15:27,339 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:15:27,339 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:15:27,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:27,339 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:15:27,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:27,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:15:27,968 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 380 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:27,969 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:15:27,969 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:15:27,977 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:15:28,054 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2018-09-30 20:15:28,054 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:15:28,059 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:15:28,750 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 380 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:28,772 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:15:28,773 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 59 [2018-09-30 20:15:28,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 20:15:28,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 20:15:28,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=839, Invalid=2701, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 20:15:28,774 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 60 states. [2018-09-30 20:15:29,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:15:29,289 INFO L93 Difference]: Finished difference Result 127 states and 129 transitions. [2018-09-30 20:15:29,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 20:15:29,289 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 82 [2018-09-30 20:15:29,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:15:29,290 INFO L225 Difference]: With dead ends: 127 [2018-09-30 20:15:29,290 INFO L226 Difference]: Without dead ends: 85 [2018-09-30 20:15:29,291 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1618, Invalid=4544, Unknown=0, NotChecked=0, Total=6162 [2018-09-30 20:15:29,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-30 20:15:29,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-30 20:15:29,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-30 20:15:29,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2018-09-30 20:15:29,303 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 82 [2018-09-30 20:15:29,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:15:29,303 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2018-09-30 20:15:29,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-30 20:15:29,304 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2018-09-30 20:15:29,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-30 20:15:29,304 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:15:29,305 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 19, 1, 1, 1, 1] [2018-09-30 20:15:29,305 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:15:29,305 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:15:29,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1871192825, now seen corresponding path program 28 times [2018-09-30 20:15:29,305 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:15:29,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:15:29,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:29,306 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:15:29,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:29,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:15:29,988 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 420 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:29,988 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:15:29,988 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:15:30,000 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:15:30,078 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:15:30,078 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:15:30,098 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:15:30,169 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 420 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:30,189 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:15:30,190 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2018-09-30 20:15:30,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 20:15:30,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 20:15:30,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2018-09-30 20:15:30,190 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 26 states. [2018-09-30 20:15:30,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:15:30,690 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2018-09-30 20:15:30,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 20:15:30,690 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 84 [2018-09-30 20:15:30,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:15:30,691 INFO L225 Difference]: With dead ends: 92 [2018-09-30 20:15:30,692 INFO L226 Difference]: Without dead ends: 90 [2018-09-30 20:15:30,692 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=807, Invalid=1355, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 20:15:30,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-09-30 20:15:30,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2018-09-30 20:15:30,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-30 20:15:30,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2018-09-30 20:15:30,703 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 84 [2018-09-30 20:15:30,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:15:30,704 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2018-09-30 20:15:30,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 20:15:30,704 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2018-09-30 20:15:30,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-30 20:15:30,704 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:15:30,705 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 20, 1, 1, 1, 1] [2018-09-30 20:15:30,705 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:15:30,705 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:15:30,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1432067077, now seen corresponding path program 29 times [2018-09-30 20:15:30,705 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:15:30,705 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:15:30,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:30,706 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:15:30,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:30,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:15:31,448 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 462 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:31,448 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:15:31,448 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:15:31,455 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:15:31,640 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-30 20:15:31,640 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:15:31,644 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:15:32,507 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 462 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:32,527 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:15:32,528 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 64 [2018-09-30 20:15:32,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-30 20:15:32,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-30 20:15:32,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=988, Invalid=3172, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 20:15:32,529 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 65 states. [2018-09-30 20:15:33,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:15:33,086 INFO L93 Difference]: Finished difference Result 137 states and 139 transitions. [2018-09-30 20:15:33,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 20:15:33,086 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 88 [2018-09-30 20:15:33,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:15:33,087 INFO L225 Difference]: With dead ends: 137 [2018-09-30 20:15:33,087 INFO L226 Difference]: Without dead ends: 91 [2018-09-30 20:15:33,088 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1848, Invalid=5292, Unknown=0, NotChecked=0, Total=7140 [2018-09-30 20:15:33,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-30 20:15:33,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-30 20:15:33,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-30 20:15:33,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2018-09-30 20:15:33,096 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 88 [2018-09-30 20:15:33,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:15:33,097 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2018-09-30 20:15:33,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-30 20:15:33,097 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2018-09-30 20:15:33,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-30 20:15:33,097 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:15:33,097 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1] [2018-09-30 20:15:33,098 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:15:33,098 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:15:33,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1476838665, now seen corresponding path program 30 times [2018-09-30 20:15:33,098 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:15:33,098 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:15:33,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:33,099 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:15:33,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:33,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:15:34,146 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 462 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:34,146 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:15:34,146 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:15:34,153 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:15:34,241 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-30 20:15:34,241 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:15:34,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:15:36,215 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 462 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:36,236 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:15:36,236 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 65 [2018-09-30 20:15:36,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-30 20:15:36,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-30 20:15:36,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1011, Invalid=3279, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 20:15:36,238 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 66 states. [2018-09-30 20:15:37,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:15:37,016 INFO L93 Difference]: Finished difference Result 139 states and 141 transitions. [2018-09-30 20:15:37,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 20:15:37,017 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 90 [2018-09-30 20:15:37,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:15:37,018 INFO L225 Difference]: With dead ends: 139 [2018-09-30 20:15:37,018 INFO L226 Difference]: Without dead ends: 93 [2018-09-30 20:15:37,020 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1472 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1956, Invalid=5526, Unknown=0, NotChecked=0, Total=7482 [2018-09-30 20:15:37,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-30 20:15:37,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-30 20:15:37,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-30 20:15:37,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2018-09-30 20:15:37,032 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 90 [2018-09-30 20:15:37,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:15:37,032 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2018-09-30 20:15:37,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-30 20:15:37,032 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2018-09-30 20:15:37,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-30 20:15:37,033 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:15:37,033 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 21, 1, 1, 1, 1] [2018-09-30 20:15:37,033 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:15:37,033 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:15:37,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1552661773, now seen corresponding path program 31 times [2018-09-30 20:15:37,034 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:15:37,034 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:15:37,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:37,034 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:15:37,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:37,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:15:37,532 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 506 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:37,532 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:15:37,532 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:15:37,540 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:15:37,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:15:37,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:15:37,654 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 506 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:37,676 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:15:37,676 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2018-09-30 20:15:37,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 20:15:37,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 20:15:37,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2018-09-30 20:15:37,677 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 28 states. [2018-09-30 20:15:38,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:15:38,099 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2018-09-30 20:15:38,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 20:15:38,099 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 92 [2018-09-30 20:15:38,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:15:38,101 INFO L225 Difference]: With dead ends: 100 [2018-09-30 20:15:38,101 INFO L226 Difference]: Without dead ends: 98 [2018-09-30 20:15:38,102 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=952, Invalid=1598, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 20:15:38,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-30 20:15:38,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2018-09-30 20:15:38,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-30 20:15:38,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2018-09-30 20:15:38,114 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 92 [2018-09-30 20:15:38,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:15:38,114 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2018-09-30 20:15:38,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 20:15:38,114 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2018-09-30 20:15:38,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-30 20:15:38,115 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:15:38,115 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 22, 1, 1, 1, 1] [2018-09-30 20:15:38,115 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:15:38,115 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:15:38,116 INFO L82 PathProgramCache]: Analyzing trace with hash 2078536679, now seen corresponding path program 32 times [2018-09-30 20:15:38,116 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:15:38,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:15:38,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:38,117 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:15:38,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:38,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:15:39,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 552 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:39,268 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:15:39,268 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:15:39,275 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:15:39,347 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:15:39,347 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:15:39,350 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:15:40,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 550 proven. 506 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-30 20:15:40,225 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:15:40,226 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 69 [2018-09-30 20:15:40,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-30 20:15:40,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-30 20:15:40,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1127, Invalid=3703, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 20:15:40,227 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 70 states. [2018-09-30 20:15:41,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:15:41,039 INFO L93 Difference]: Finished difference Result 149 states and 151 transitions. [2018-09-30 20:15:41,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 20:15:41,039 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 96 [2018-09-30 20:15:41,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:15:41,040 INFO L225 Difference]: With dead ends: 149 [2018-09-30 20:15:41,040 INFO L226 Difference]: Without dead ends: 99 [2018-09-30 20:15:41,041 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1683 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2161, Invalid=6211, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 20:15:41,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-30 20:15:41,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-30 20:15:41,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-30 20:15:41,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2018-09-30 20:15:41,052 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 96 [2018-09-30 20:15:41,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:15:41,052 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2018-09-30 20:15:41,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-30 20:15:41,052 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2018-09-30 20:15:41,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-30 20:15:41,053 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:15:41,053 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1] [2018-09-30 20:15:41,053 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:15:41,053 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:15:41,053 INFO L82 PathProgramCache]: Analyzing trace with hash 224399075, now seen corresponding path program 33 times [2018-09-30 20:15:41,053 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:15:41,053 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:15:41,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:41,054 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:15:41,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:41,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:15:41,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 552 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:41,914 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:15:41,914 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:15:41,923 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:15:42,034 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-30 20:15:42,035 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:15:42,039 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:15:44,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 552 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:44,142 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:15:44,143 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 71 [2018-09-30 20:15:44,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-30 20:15:44,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-30 20:15:44,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1199, Invalid=3913, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 20:15:44,144 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 72 states. [2018-09-30 20:15:45,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:15:45,391 INFO L93 Difference]: Finished difference Result 151 states and 153 transitions. [2018-09-30 20:15:45,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 20:15:45,391 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 98 [2018-09-30 20:15:45,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:15:45,392 INFO L225 Difference]: With dead ends: 151 [2018-09-30 20:15:45,392 INFO L226 Difference]: Without dead ends: 101 [2018-09-30 20:15:45,393 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1773 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2326, Invalid=6604, Unknown=0, NotChecked=0, Total=8930 [2018-09-30 20:15:45,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-30 20:15:45,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-30 20:15:45,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-30 20:15:45,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2018-09-30 20:15:45,405 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 98 [2018-09-30 20:15:45,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:15:45,405 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2018-09-30 20:15:45,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-30 20:15:45,405 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2018-09-30 20:15:45,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-30 20:15:45,406 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:15:45,406 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 23, 1, 1, 1, 1] [2018-09-30 20:15:45,406 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:15:45,406 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:15:45,406 INFO L82 PathProgramCache]: Analyzing trace with hash 809589471, now seen corresponding path program 34 times [2018-09-30 20:15:45,407 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:15:45,407 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:15:45,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:45,408 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:15:45,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:45,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:15:45,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 600 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:45,909 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:15:45,909 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:15:45,921 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:15:46,001 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:15:46,001 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:15:46,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:15:46,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 600 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:46,084 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:15:46,084 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2018-09-30 20:15:46,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 20:15:46,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 20:15:46,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2018-09-30 20:15:46,085 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 30 states. [2018-09-30 20:15:46,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:15:46,582 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2018-09-30 20:15:46,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 20:15:46,584 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 100 [2018-09-30 20:15:46,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:15:46,585 INFO L225 Difference]: With dead ends: 108 [2018-09-30 20:15:46,585 INFO L226 Difference]: Without dead ends: 106 [2018-09-30 20:15:46,585 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1109, Invalid=1861, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 20:15:46,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-30 20:15:46,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2018-09-30 20:15:46,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-30 20:15:46,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2018-09-30 20:15:46,595 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 100 [2018-09-30 20:15:46,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:15:46,595 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2018-09-30 20:15:46,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 20:15:46,595 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2018-09-30 20:15:46,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-30 20:15:46,596 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:15:46,596 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 24, 1, 1, 1, 1] [2018-09-30 20:15:46,596 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:15:46,596 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:15:46,596 INFO L82 PathProgramCache]: Analyzing trace with hash 726349267, now seen corresponding path program 35 times [2018-09-30 20:15:46,596 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:15:46,596 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:15:46,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:46,597 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:15:46,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:46,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:15:48,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 650 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:48,480 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:15:48,480 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:15:48,487 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:15:48,594 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2018-09-30 20:15:48,595 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:15:48,598 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:15:49,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 650 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:49,772 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:15:49,772 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 76 [2018-09-30 20:15:49,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-30 20:15:49,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-30 20:15:49,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1376, Invalid=4476, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 20:15:49,773 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 77 states. [2018-09-30 20:15:50,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:15:50,478 INFO L93 Difference]: Finished difference Result 161 states and 163 transitions. [2018-09-30 20:15:50,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 20:15:50,478 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 104 [2018-09-30 20:15:50,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:15:50,479 INFO L225 Difference]: With dead ends: 161 [2018-09-30 20:15:50,479 INFO L226 Difference]: Without dead ends: 107 [2018-09-30 20:15:50,480 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2052 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2600, Invalid=7500, Unknown=0, NotChecked=0, Total=10100 [2018-09-30 20:15:50,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-30 20:15:50,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-30 20:15:50,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-30 20:15:50,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2018-09-30 20:15:50,490 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 104 [2018-09-30 20:15:50,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:15:50,490 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2018-09-30 20:15:50,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-30 20:15:50,491 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2018-09-30 20:15:50,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-30 20:15:50,491 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:15:50,491 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1] [2018-09-30 20:15:50,492 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:15:50,492 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:15:50,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1735038159, now seen corresponding path program 36 times [2018-09-30 20:15:50,492 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:15:50,492 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:15:50,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:50,493 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:15:50,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:50,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:15:51,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 650 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:51,812 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:15:51,812 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:15:51,820 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:15:51,923 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-09-30 20:15:51,924 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:15:51,927 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:15:52,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 650 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:52,966 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:15:52,966 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 77 [2018-09-30 20:15:52,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-30 20:15:52,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-30 20:15:52,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1403, Invalid=4603, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 20:15:52,967 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 78 states. [2018-09-30 20:15:54,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:15:54,171 INFO L93 Difference]: Finished difference Result 163 states and 165 transitions. [2018-09-30 20:15:54,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 20:15:54,171 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 106 [2018-09-30 20:15:54,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:15:54,172 INFO L225 Difference]: With dead ends: 163 [2018-09-30 20:15:54,172 INFO L226 Difference]: Without dead ends: 109 [2018-09-30 20:15:54,173 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2102 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2728, Invalid=7778, Unknown=0, NotChecked=0, Total=10506 [2018-09-30 20:15:54,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-30 20:15:54,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-30 20:15:54,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-30 20:15:54,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2018-09-30 20:15:54,186 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 106 [2018-09-30 20:15:54,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:15:54,187 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2018-09-30 20:15:54,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-30 20:15:54,187 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2018-09-30 20:15:54,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-30 20:15:54,187 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:15:54,188 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 25, 1, 1, 1, 1] [2018-09-30 20:15:54,188 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:15:54,188 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:15:54,188 INFO L82 PathProgramCache]: Analyzing trace with hash 422454475, now seen corresponding path program 37 times [2018-09-30 20:15:54,188 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:15:54,188 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:15:54,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:54,189 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:15:54,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:54,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:15:54,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 702 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:54,771 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:15:54,771 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:15:54,784 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:15:54,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:15:54,870 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:15:54,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 702 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:54,979 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:15:54,980 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2018-09-30 20:15:54,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 20:15:54,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 20:15:54,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2018-09-30 20:15:54,980 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 32 states. [2018-09-30 20:15:55,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:15:55,582 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2018-09-30 20:15:55,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-30 20:15:55,588 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 108 [2018-09-30 20:15:55,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:15:55,589 INFO L225 Difference]: With dead ends: 116 [2018-09-30 20:15:55,589 INFO L226 Difference]: Without dead ends: 114 [2018-09-30 20:15:55,590 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1278, Invalid=2144, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 20:15:55,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-09-30 20:15:55,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2018-09-30 20:15:55,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-30 20:15:55,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2018-09-30 20:15:55,608 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 108 [2018-09-30 20:15:55,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:15:55,609 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2018-09-30 20:15:55,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 20:15:55,609 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2018-09-30 20:15:55,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-30 20:15:55,610 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:15:55,610 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 27, 26, 1, 1, 1, 1] [2018-09-30 20:15:55,610 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:15:55,611 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:15:55,611 INFO L82 PathProgramCache]: Analyzing trace with hash -609670721, now seen corresponding path program 38 times [2018-09-30 20:15:55,611 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:15:55,611 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:15:55,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:55,612 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:15:55,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:55,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:15:56,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 756 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:15:56,874 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:15:56,874 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:15:56,881 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:15:56,964 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:15:56,964 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:15:56,969 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:15:58,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 754 proven. 702 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-30 20:15:58,330 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:15:58,330 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54] total 81 [2018-09-30 20:15:58,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-30 20:15:58,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-30 20:15:58,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1539, Invalid=5103, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 20:15:58,332 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 82 states. [2018-09-30 20:15:59,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:15:59,388 INFO L93 Difference]: Finished difference Result 173 states and 175 transitions. [2018-09-30 20:15:59,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 20:15:59,389 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 112 [2018-09-30 20:15:59,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:15:59,390 INFO L225 Difference]: With dead ends: 173 [2018-09-30 20:15:59,390 INFO L226 Difference]: Without dead ends: 115 [2018-09-30 20:15:59,391 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2353 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2969, Invalid=8587, Unknown=0, NotChecked=0, Total=11556 [2018-09-30 20:15:59,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-30 20:15:59,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-30 20:15:59,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-30 20:15:59,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2018-09-30 20:15:59,403 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 112 [2018-09-30 20:15:59,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:15:59,403 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2018-09-30 20:15:59,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-30 20:15:59,403 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2018-09-30 20:15:59,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-30 20:15:59,404 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:15:59,404 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1] [2018-09-30 20:15:59,404 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:15:59,404 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:15:59,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1662530373, now seen corresponding path program 39 times [2018-09-30 20:15:59,405 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:15:59,405 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:15:59,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:59,405 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:15:59,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:59,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:16:01,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 756 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:16:01,062 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:16:01,062 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:16:01,071 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:16:01,194 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-30 20:16:01,194 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:16:01,199 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:16:02,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 756 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:16:02,495 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:16:02,495 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 83 [2018-09-30 20:16:02,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-30 20:16:02,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-30 20:16:02,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1623, Invalid=5349, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 20:16:02,496 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 84 states. [2018-09-30 20:16:03,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:16:03,383 INFO L93 Difference]: Finished difference Result 175 states and 177 transitions. [2018-09-30 20:16:03,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 20:16:03,383 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 114 [2018-09-30 20:16:03,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:16:03,384 INFO L225 Difference]: With dead ends: 175 [2018-09-30 20:16:03,384 INFO L226 Difference]: Without dead ends: 117 [2018-09-30 20:16:03,385 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2459 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3162, Invalid=9048, Unknown=0, NotChecked=0, Total=12210 [2018-09-30 20:16:03,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-30 20:16:03,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-09-30 20:16:03,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-30 20:16:03,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2018-09-30 20:16:03,400 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 114 [2018-09-30 20:16:03,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:16:03,400 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2018-09-30 20:16:03,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-30 20:16:03,400 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2018-09-30 20:16:03,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-30 20:16:03,401 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:16:03,401 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 27, 1, 1, 1, 1] [2018-09-30 20:16:03,401 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:16:03,401 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:16:03,401 INFO L82 PathProgramCache]: Analyzing trace with hash 151625911, now seen corresponding path program 40 times [2018-09-30 20:16:03,401 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:16:03,401 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:16:03,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:16:03,402 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:16:03,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:16:03,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:16:04,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 812 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:16:04,535 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:16:04,535 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:16:04,543 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:16:04,638 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:16:04,639 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:16:04,644 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:16:05,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 812 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:16:05,132 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:16:05,132 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2018-09-30 20:16:05,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 20:16:05,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 20:16:05,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 20:16:05,133 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 34 states. [2018-09-30 20:16:06,359 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 7 [2018-09-30 20:16:06,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:16:06,892 INFO L93 Difference]: Finished difference Result 124 states and 126 transitions. [2018-09-30 20:16:06,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-30 20:16:06,892 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 116 [2018-09-30 20:16:06,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:16:06,894 INFO L225 Difference]: With dead ends: 124 [2018-09-30 20:16:06,894 INFO L226 Difference]: Without dead ends: 122 [2018-09-30 20:16:06,895 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1459, Invalid=2447, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 20:16:06,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-09-30 20:16:06,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2018-09-30 20:16:06,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-30 20:16:06,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2018-09-30 20:16:06,910 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 116 [2018-09-30 20:16:06,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:16:06,910 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2018-09-30 20:16:06,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 20:16:06,910 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2018-09-30 20:16:06,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-09-30 20:16:06,911 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:16:06,911 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 29, 28, 1, 1, 1, 1] [2018-09-30 20:16:06,911 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:16:06,911 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:16:06,912 INFO L82 PathProgramCache]: Analyzing trace with hash 944557995, now seen corresponding path program 41 times [2018-09-30 20:16:06,912 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:16:06,912 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:16:06,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:16:06,913 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:16:06,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:16:06,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:16:08,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 870 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:16:08,100 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:16:08,100 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:16:08,108 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:16:08,246 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-30 20:16:08,246 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:16:08,251 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:16:09,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 870 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:16:09,702 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:16:09,703 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 88 [2018-09-30 20:16:09,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-30 20:16:09,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-30 20:16:09,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1828, Invalid=6004, Unknown=0, NotChecked=0, Total=7832 [2018-09-30 20:16:09,704 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand 89 states. [2018-09-30 20:16:10,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:16:10,700 INFO L93 Difference]: Finished difference Result 185 states and 187 transitions. [2018-09-30 20:16:10,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 20:16:10,700 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 120 [2018-09-30 20:16:10,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:16:10,701 INFO L225 Difference]: With dead ends: 185 [2018-09-30 20:16:10,701 INFO L226 Difference]: Without dead ends: 123 [2018-09-30 20:16:10,702 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2786 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3480, Invalid=10092, Unknown=0, NotChecked=0, Total=13572 [2018-09-30 20:16:10,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-30 20:16:10,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-09-30 20:16:10,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-30 20:16:10,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2018-09-30 20:16:10,720 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 120 [2018-09-30 20:16:10,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:16:10,720 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2018-09-30 20:16:10,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-30 20:16:10,721 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2018-09-30 20:16:10,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-30 20:16:10,721 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:16:10,721 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1] [2018-09-30 20:16:10,722 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:16:10,722 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:16:10,722 INFO L82 PathProgramCache]: Analyzing trace with hash 489076391, now seen corresponding path program 42 times [2018-09-30 20:16:10,722 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:16:10,722 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:16:10,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:16:10,723 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:16:10,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:16:10,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:16:12,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 870 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:16:12,386 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:16:12,386 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:16:12,393 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:16:12,523 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2018-09-30 20:16:12,524 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:16:12,528 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:16:13,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 870 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:16:13,912 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:16:13,913 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 89 [2018-09-30 20:16:13,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-30 20:16:13,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-30 20:16:13,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1859, Invalid=6151, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 20:16:13,914 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 90 states. [2018-09-30 20:16:14,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:16:14,772 INFO L93 Difference]: Finished difference Result 187 states and 189 transitions. [2018-09-30 20:16:14,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-30 20:16:14,772 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 122 [2018-09-30 20:16:14,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:16:14,772 INFO L225 Difference]: With dead ends: 187 [2018-09-30 20:16:14,773 INFO L226 Difference]: Without dead ends: 125 [2018-09-30 20:16:14,774 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2844 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3628, Invalid=10414, Unknown=0, NotChecked=0, Total=14042 [2018-09-30 20:16:14,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-09-30 20:16:14,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-09-30 20:16:14,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-30 20:16:14,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2018-09-30 20:16:14,788 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 122 [2018-09-30 20:16:14,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:16:14,789 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2018-09-30 20:16:14,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-30 20:16:14,789 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2018-09-30 20:16:14,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-09-30 20:16:14,789 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:16:14,790 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 30, 29, 1, 1, 1, 1] [2018-09-30 20:16:14,790 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:16:14,790 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:16:14,790 INFO L82 PathProgramCache]: Analyzing trace with hash 857919139, now seen corresponding path program 43 times [2018-09-30 20:16:14,790 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:16:14,790 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:16:14,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:16:14,791 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:16:14,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:16:14,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:16:15,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 930 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:16:15,416 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:16:15,416 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:16:15,425 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:16:15,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:16:15,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:16:15,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 930 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:16:15,800 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:16:15,801 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2018-09-30 20:16:15,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 20:16:15,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 20:16:15,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 20:16:15,801 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand 36 states. [2018-09-30 20:16:16,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:16:16,632 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2018-09-30 20:16:16,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-30 20:16:16,632 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 124 [2018-09-30 20:16:16,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:16:16,633 INFO L225 Difference]: With dead ends: 132 [2018-09-30 20:16:16,634 INFO L226 Difference]: Without dead ends: 130 [2018-09-30 20:16:16,634 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1652, Invalid=2770, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 20:16:16,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-09-30 20:16:16,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2018-09-30 20:16:16,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-30 20:16:16,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2018-09-30 20:16:16,653 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 124 [2018-09-30 20:16:16,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:16:16,653 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2018-09-30 20:16:16,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 20:16:16,654 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2018-09-30 20:16:16,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-30 20:16:16,654 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:16:16,654 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 31, 30, 1, 1, 1, 1] [2018-09-30 20:16:16,655 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:16:16,655 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:16:16,655 INFO L82 PathProgramCache]: Analyzing trace with hash 889530263, now seen corresponding path program 44 times [2018-09-30 20:16:16,655 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:16:16,655 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:16:16,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:16:16,656 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:16:16,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:16:16,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:16:18,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 992 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:16:18,182 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:16:18,182 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:16:18,189 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:16:18,283 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:16:18,284 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:16:18,287 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:16:19,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 990 proven. 930 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-30 20:16:19,946 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:16:19,947 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62] total 93 [2018-09-30 20:16:19,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-30 20:16:19,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-30 20:16:19,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2015, Invalid=6727, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 20:16:19,948 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand 94 states. [2018-09-30 20:16:21,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:16:21,058 INFO L93 Difference]: Finished difference Result 197 states and 199 transitions. [2018-09-30 20:16:21,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 20:16:21,058 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 128 [2018-09-30 20:16:21,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:16:21,058 INFO L225 Difference]: With dead ends: 197 [2018-09-30 20:16:21,059 INFO L226 Difference]: Without dead ends: 131 [2018-09-30 20:16:21,059 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3135 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3905, Invalid=11347, Unknown=0, NotChecked=0, Total=15252 [2018-09-30 20:16:21,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-30 20:16:21,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-30 20:16:21,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-30 20:16:21,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2018-09-30 20:16:21,077 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 128 [2018-09-30 20:16:21,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:16:21,077 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2018-09-30 20:16:21,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-30 20:16:21,078 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2018-09-30 20:16:21,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-30 20:16:21,078 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:16:21,078 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1] [2018-09-30 20:16:21,079 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:16:21,079 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:16:21,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1611246957, now seen corresponding path program 45 times [2018-09-30 20:16:21,079 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:16:21,079 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:16:21,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:16:21,080 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:16:21,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:16:21,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:16:22,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 992 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:16:22,871 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:16:22,871 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:16:22,880 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:16:23,020 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2018-09-30 20:16:23,020 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:16:23,024 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:16:24,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 992 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:16:24,563 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:16:24,563 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 95 [2018-09-30 20:16:24,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-30 20:16:24,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-30 20:16:24,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2111, Invalid=7009, Unknown=0, NotChecked=0, Total=9120 [2018-09-30 20:16:24,564 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand 96 states. [2018-09-30 20:16:25,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:16:25,666 INFO L93 Difference]: Finished difference Result 199 states and 201 transitions. [2018-09-30 20:16:25,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 20:16:25,666 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 130 [2018-09-30 20:16:25,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:16:25,667 INFO L225 Difference]: With dead ends: 199 [2018-09-30 20:16:25,667 INFO L226 Difference]: Without dead ends: 133 [2018-09-30 20:16:25,668 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3257 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4126, Invalid=11876, Unknown=0, NotChecked=0, Total=16002 [2018-09-30 20:16:25,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-30 20:16:25,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-09-30 20:16:25,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-30 20:16:25,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2018-09-30 20:16:25,682 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 130 [2018-09-30 20:16:25,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:16:25,682 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2018-09-30 20:16:25,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-30 20:16:25,682 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2018-09-30 20:16:25,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-30 20:16:25,683 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:16:25,683 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 32, 31, 1, 1, 1, 1] [2018-09-30 20:16:25,683 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:16:25,683 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:16:25,683 INFO L82 PathProgramCache]: Analyzing trace with hash 323530383, now seen corresponding path program 46 times [2018-09-30 20:16:25,684 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:16:25,684 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:16:25,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:16:25,684 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:16:25,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:16:25,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:16:26,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1056 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:16:26,664 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:16:26,664 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:16:26,673 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:16:26,776 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:16:26,776 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:16:26,782 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:16:26,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1056 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:16:27,007 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:16:27,007 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2018-09-30 20:16:27,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 20:16:27,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 20:16:27,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 20:16:27,008 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand 38 states. [2018-09-30 20:16:27,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:16:27,700 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2018-09-30 20:16:27,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-30 20:16:27,701 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 132 [2018-09-30 20:16:27,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:16:27,702 INFO L225 Difference]: With dead ends: 140 [2018-09-30 20:16:27,702 INFO L226 Difference]: Without dead ends: 138 [2018-09-30 20:16:27,703 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1857, Invalid=3113, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 20:16:27,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-09-30 20:16:27,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2018-09-30 20:16:27,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-09-30 20:16:27,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2018-09-30 20:16:27,725 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 132 [2018-09-30 20:16:27,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:16:27,725 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2018-09-30 20:16:27,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 20:16:27,725 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2018-09-30 20:16:27,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-09-30 20:16:27,726 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:16:27,726 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 33, 32, 1, 1, 1, 1] [2018-09-30 20:16:27,727 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:16:27,727 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:16:27,727 INFO L82 PathProgramCache]: Analyzing trace with hash -836685437, now seen corresponding path program 47 times [2018-09-30 20:16:27,727 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:16:27,727 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:16:27,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:16:27,728 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:16:27,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:16:27,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:16:29,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1122 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:16:29,279 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:16:29,279 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:16:29,286 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:16:29,436 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-30 20:16:29,436 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:16:29,441 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:16:32,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1122 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:16:32,347 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:16:32,348 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 100 [2018-09-30 20:16:32,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-30 20:16:32,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-30 20:16:32,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2344, Invalid=7756, Unknown=0, NotChecked=0, Total=10100 [2018-09-30 20:16:32,349 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand 101 states. [2018-09-30 20:16:33,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:16:33,481 INFO L93 Difference]: Finished difference Result 209 states and 211 transitions. [2018-09-30 20:16:33,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-30 20:16:33,488 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 136 [2018-09-30 20:16:33,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:16:33,489 INFO L225 Difference]: With dead ends: 209 [2018-09-30 20:16:33,489 INFO L226 Difference]: Without dead ends: 139 [2018-09-30 20:16:33,490 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3632 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=4488, Invalid=13068, Unknown=0, NotChecked=0, Total=17556 [2018-09-30 20:16:33,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-30 20:16:33,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-09-30 20:16:33,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-30 20:16:33,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2018-09-30 20:16:33,506 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 136 [2018-09-30 20:16:33,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:16:33,506 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2018-09-30 20:16:33,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-30 20:16:33,506 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2018-09-30 20:16:33,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-30 20:16:33,507 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:16:33,507 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1] [2018-09-30 20:16:33,507 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:16:33,507 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:16:33,507 INFO L82 PathProgramCache]: Analyzing trace with hash -442130305, now seen corresponding path program 48 times [2018-09-30 20:16:33,507 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:16:33,507 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:16:33,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:16:33,508 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:16:33,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:16:33,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:16:35,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 1122 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:16:35,094 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:16:35,094 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:16:35,101 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:16:35,243 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-09-30 20:16:35,243 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:16:35,248 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:16:37,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 1122 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:16:37,321 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:16:37,321 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 101 [2018-09-30 20:16:37,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-30 20:16:37,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-30 20:16:37,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2379, Invalid=7923, Unknown=0, NotChecked=0, Total=10302 [2018-09-30 20:16:37,323 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand 102 states. [2018-09-30 20:16:38,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:16:38,495 INFO L93 Difference]: Finished difference Result 211 states and 213 transitions. [2018-09-30 20:16:38,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-30 20:16:38,496 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 138 [2018-09-30 20:16:38,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:16:38,496 INFO L225 Difference]: With dead ends: 211 [2018-09-30 20:16:38,497 INFO L226 Difference]: Without dead ends: 141 [2018-09-30 20:16:38,498 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3698 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=4656, Invalid=13434, Unknown=0, NotChecked=0, Total=18090 [2018-09-30 20:16:38,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-09-30 20:16:38,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-09-30 20:16:38,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-09-30 20:16:38,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2018-09-30 20:16:38,514 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 138 [2018-09-30 20:16:38,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:16:38,514 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2018-09-30 20:16:38,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-30 20:16:38,514 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2018-09-30 20:16:38,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-30 20:16:38,515 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:16:38,515 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 34, 33, 1, 1, 1, 1] [2018-09-30 20:16:38,515 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:16:38,515 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:16:38,515 INFO L82 PathProgramCache]: Analyzing trace with hash 768229499, now seen corresponding path program 49 times [2018-09-30 20:16:38,516 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:16:38,516 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:16:38,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:16:38,516 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:16:38,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:16:38,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:16:39,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1190 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:16:39,291 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:16:39,291 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:16:39,297 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:16:39,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:16:39,402 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:16:39,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1190 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:16:39,571 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:16:39,571 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 39 [2018-09-30 20:16:39,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 20:16:39,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 20:16:39,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=852, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 20:16:39,572 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand 40 states. [2018-09-30 20:16:40,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:16:40,324 INFO L93 Difference]: Finished difference Result 148 states and 150 transitions. [2018-09-30 20:16:40,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-30 20:16:40,324 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 140 [2018-09-30 20:16:40,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:16:40,326 INFO L225 Difference]: With dead ends: 148 [2018-09-30 20:16:40,326 INFO L226 Difference]: Without dead ends: 146 [2018-09-30 20:16:40,327 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2074, Invalid=3476, Unknown=0, NotChecked=0, Total=5550 [2018-09-30 20:16:40,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-09-30 20:16:40,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2018-09-30 20:16:40,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-09-30 20:16:40,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2018-09-30 20:16:40,347 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 140 [2018-09-30 20:16:40,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:16:40,348 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2018-09-30 20:16:40,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 20:16:40,348 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2018-09-30 20:16:40,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-09-30 20:16:40,349 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:16:40,349 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 35, 34, 1, 1, 1, 1] [2018-09-30 20:16:40,349 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:16:40,349 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:16:40,349 INFO L82 PathProgramCache]: Analyzing trace with hash -932188817, now seen corresponding path program 50 times [2018-09-30 20:16:40,349 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:16:40,350 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:16:40,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:16:40,350 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:16:40,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:16:40,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:16:42,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1260 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:16:42,484 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:16:42,484 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:16:42,492 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:16:42,603 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:16:42,604 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:16:42,607 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:16:44,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1258 proven. 1190 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-30 20:16:44,555 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:16:44,556 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70] total 105 [2018-09-30 20:16:44,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-30 20:16:44,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-30 20:16:44,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2555, Invalid=8575, Unknown=0, NotChecked=0, Total=11130 [2018-09-30 20:16:44,558 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand 106 states. [2018-09-30 20:16:45,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:16:45,837 INFO L93 Difference]: Finished difference Result 221 states and 223 transitions. [2018-09-30 20:16:45,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 20:16:45,837 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 144 [2018-09-30 20:16:45,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:16:45,838 INFO L225 Difference]: With dead ends: 221 [2018-09-30 20:16:45,838 INFO L226 Difference]: Without dead ends: 147 [2018-09-30 20:16:45,839 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4029 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=4969, Invalid=14491, Unknown=0, NotChecked=0, Total=19460 [2018-09-30 20:16:45,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-30 20:16:45,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-09-30 20:16:45,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-09-30 20:16:45,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2018-09-30 20:16:45,855 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 144 [2018-09-30 20:16:45,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:16:45,855 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2018-09-30 20:16:45,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-30 20:16:45,855 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2018-09-30 20:16:45,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-30 20:16:45,856 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:16:45,856 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1, 1, 1] [2018-09-30 20:16:45,856 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:16:45,856 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:16:45,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1996726379, now seen corresponding path program 51 times [2018-09-30 20:16:45,856 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:16:45,857 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:16:45,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:16:45,857 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:16:45,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:16:45,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:16:47,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 1260 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:16:47,814 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:16:47,815 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:16:47,824 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:16:47,988 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-09-30 20:16:47,988 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:16:47,992 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:16:49,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 1260 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:16:49,927 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:16:49,927 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 107 [2018-09-30 20:16:49,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-30 20:16:49,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-30 20:16:49,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2663, Invalid=8893, Unknown=0, NotChecked=0, Total=11556 [2018-09-30 20:16:49,929 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand 108 states. [2018-09-30 20:16:51,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:16:51,319 INFO L93 Difference]: Finished difference Result 223 states and 225 transitions. [2018-09-30 20:16:51,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-30 20:16:51,319 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 146 [2018-09-30 20:16:51,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:16:51,320 INFO L225 Difference]: With dead ends: 223 [2018-09-30 20:16:51,320 INFO L226 Difference]: Without dead ends: 149 [2018-09-30 20:16:51,321 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4167 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=5218, Invalid=15088, Unknown=0, NotChecked=0, Total=20306 [2018-09-30 20:16:51,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-30 20:16:51,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-09-30 20:16:51,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-30 20:16:51,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2018-09-30 20:16:51,337 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 146 [2018-09-30 20:16:51,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:16:51,338 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2018-09-30 20:16:51,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-30 20:16:51,338 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2018-09-30 20:16:51,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-30 20:16:51,338 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:16:51,338 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 36, 35, 1, 1, 1, 1] [2018-09-30 20:16:51,339 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:16:51,339 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:16:51,339 INFO L82 PathProgramCache]: Analyzing trace with hash -814316441, now seen corresponding path program 52 times [2018-09-30 20:16:51,339 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:16:51,339 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:16:51,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:16:51,340 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:16:51,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:16:51,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:16:52,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1332 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:16:52,327 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:16:52,327 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:16:52,334 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:16:52,450 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:16:52,450 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:16:52,454 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:16:52,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1332 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:16:52,568 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:16:52,568 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 41 [2018-09-30 20:16:52,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 20:16:52,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 20:16:52,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=937, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 20:16:52,569 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand 42 states. [2018-09-30 20:16:53,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:16:53,410 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2018-09-30 20:16:53,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-30 20:16:53,410 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 148 [2018-09-30 20:16:53,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:16:53,411 INFO L225 Difference]: With dead ends: 156 [2018-09-30 20:16:53,411 INFO L226 Difference]: Without dead ends: 154 [2018-09-30 20:16:53,412 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2303, Invalid=3859, Unknown=0, NotChecked=0, Total=6162 [2018-09-30 20:16:53,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-09-30 20:16:53,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2018-09-30 20:16:53,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-09-30 20:16:53,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2018-09-30 20:16:53,431 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 148 [2018-09-30 20:16:53,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:16:53,432 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2018-09-30 20:16:53,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 20:16:53,432 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2018-09-30 20:16:53,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-30 20:16:53,433 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:16:53,433 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 37, 36, 1, 1, 1, 1] [2018-09-30 20:16:53,433 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:16:53,433 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:16:53,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1900043099, now seen corresponding path program 53 times [2018-09-30 20:16:53,433 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:16:53,433 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:16:53,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:16:53,434 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:16:53,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:16:53,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:16:55,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2738 backedges. 1406 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:16:55,190 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:16:55,190 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:16:55,207 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:16:55,431 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 38 check-sat command(s) [2018-09-30 20:16:55,431 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:16:55,438 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:16:57,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2738 backedges. 1406 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:16:57,896 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:16:57,896 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 112 [2018-09-30 20:16:57,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-09-30 20:16:57,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-09-30 20:16:57,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2924, Invalid=9732, Unknown=0, NotChecked=0, Total=12656 [2018-09-30 20:16:57,898 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand 113 states. [2018-09-30 20:16:59,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:16:59,306 INFO L93 Difference]: Finished difference Result 233 states and 235 transitions. [2018-09-30 20:16:59,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-30 20:16:59,306 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 152 [2018-09-30 20:16:59,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:16:59,307 INFO L225 Difference]: With dead ends: 233 [2018-09-30 20:16:59,307 INFO L226 Difference]: Without dead ends: 155 [2018-09-30 20:16:59,308 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4590 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=5624, Invalid=16428, Unknown=0, NotChecked=0, Total=22052 [2018-09-30 20:16:59,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-30 20:16:59,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-09-30 20:16:59,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-30 20:16:59,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2018-09-30 20:16:59,325 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 152 [2018-09-30 20:16:59,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:16:59,326 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2018-09-30 20:16:59,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-09-30 20:16:59,326 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2018-09-30 20:16:59,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-09-30 20:16:59,326 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:16:59,326 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 1, 1, 1, 1] [2018-09-30 20:16:59,327 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:16:59,327 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:16:59,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1700745815, now seen corresponding path program 54 times [2018-09-30 20:16:59,327 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:16:59,327 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:16:59,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:16:59,328 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:16:59,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:16:59,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:17:01,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 1406 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:17:01,077 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:17:01,077 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:17:01,085 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:17:01,255 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2018-09-30 20:17:01,256 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:17:01,260 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:17:03,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 1406 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:17:03,577 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:17:03,578 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 113 [2018-09-30 20:17:03,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-09-30 20:17:03,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-09-30 20:17:03,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2963, Invalid=9919, Unknown=0, NotChecked=0, Total=12882 [2018-09-30 20:17:03,579 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand 114 states. [2018-09-30 20:17:04,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:17:04,910 INFO L93 Difference]: Finished difference Result 235 states and 237 transitions. [2018-09-30 20:17:04,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 20:17:04,911 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 154 [2018-09-30 20:17:04,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:17:04,911 INFO L225 Difference]: With dead ends: 235 [2018-09-30 20:17:04,911 INFO L226 Difference]: Without dead ends: 157 [2018-09-30 20:17:04,913 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4664 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=5812, Invalid=16838, Unknown=0, NotChecked=0, Total=22650 [2018-09-30 20:17:04,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-09-30 20:17:04,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-09-30 20:17:04,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-09-30 20:17:04,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2018-09-30 20:17:04,931 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 154 [2018-09-30 20:17:04,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:17:04,931 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2018-09-30 20:17:04,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-09-30 20:17:04,931 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2018-09-30 20:17:04,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-09-30 20:17:04,932 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:17:04,932 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 38, 37, 1, 1, 1, 1] [2018-09-30 20:17:04,932 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:17:04,932 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:17:04,933 INFO L82 PathProgramCache]: Analyzing trace with hash -845383085, now seen corresponding path program 55 times [2018-09-30 20:17:04,933 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:17:04,933 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:17:04,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:17:04,933 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:17:04,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:17:04,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:17:05,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 1482 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:17:05,726 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:17:05,727 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:17:05,735 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:17:05,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:17:05,861 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:17:05,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 1482 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:17:05,980 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:17:05,980 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 43 [2018-09-30 20:17:05,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 20:17:05,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 20:17:05,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=1026, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 20:17:05,981 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand 44 states. [2018-09-30 20:17:06,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:17:06,875 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2018-09-30 20:17:06,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-30 20:17:06,875 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 156 [2018-09-30 20:17:06,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:17:06,877 INFO L225 Difference]: With dead ends: 164 [2018-09-30 20:17:06,877 INFO L226 Difference]: Without dead ends: 162 [2018-09-30 20:17:06,878 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1560 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2544, Invalid=4262, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 20:17:06,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-09-30 20:17:06,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2018-09-30 20:17:06,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-09-30 20:17:06,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2018-09-30 20:17:06,898 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 156 [2018-09-30 20:17:06,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:17:06,898 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2018-09-30 20:17:06,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 20:17:06,898 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2018-09-30 20:17:06,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-09-30 20:17:06,899 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:17:06,899 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 39, 38, 1, 1, 1, 1] [2018-09-30 20:17:06,899 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:17:06,899 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:17:06,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1583446855, now seen corresponding path program 56 times [2018-09-30 20:17:06,899 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:17:06,899 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:17:06,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:17:06,900 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:17:06,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:17:06,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:17:09,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 1560 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:17:09,145 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:17:09,145 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:17:09,154 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:17:09,271 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:17:09,272 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:17:09,276 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:17:11,796 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 1558 proven. 1482 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-30 20:17:11,817 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:17:11,817 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 78] total 117 [2018-09-30 20:17:11,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-09-30 20:17:11,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-09-30 20:17:11,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3159, Invalid=10647, Unknown=0, NotChecked=0, Total=13806 [2018-09-30 20:17:11,819 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand 118 states. [2018-09-30 20:17:13,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:17:13,562 INFO L93 Difference]: Finished difference Result 245 states and 247 transitions. [2018-09-30 20:17:13,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-30 20:17:13,562 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 160 [2018-09-30 20:17:13,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:17:13,563 INFO L225 Difference]: With dead ends: 245 [2018-09-30 20:17:13,563 INFO L226 Difference]: Without dead ends: 163 [2018-09-30 20:17:13,564 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5035 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=6161, Invalid=18019, Unknown=0, NotChecked=0, Total=24180 [2018-09-30 20:17:13,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-09-30 20:17:13,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-09-30 20:17:13,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-09-30 20:17:13,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2018-09-30 20:17:13,583 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 160 [2018-09-30 20:17:13,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:17:13,584 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2018-09-30 20:17:13,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-09-30 20:17:13,584 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2018-09-30 20:17:13,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-09-30 20:17:13,584 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:17:13,584 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 1, 1, 1, 1] [2018-09-30 20:17:13,585 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:17:13,585 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:17:13,585 INFO L82 PathProgramCache]: Analyzing trace with hash 176666179, now seen corresponding path program 57 times [2018-09-30 20:17:13,585 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:17:13,585 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:17:13,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:17:13,585 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:17:13,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:17:13,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:17:15,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1560 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:17:15,563 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:17:15,563 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:17:15,570 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:17:15,764 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-09-30 20:17:15,764 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:17:15,769 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:17:18,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1560 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:17:18,396 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:17:18,396 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 119 [2018-09-30 20:17:18,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-09-30 20:17:18,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-09-30 20:17:18,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3279, Invalid=11001, Unknown=0, NotChecked=0, Total=14280 [2018-09-30 20:17:18,398 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand 120 states. [2018-09-30 20:17:20,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:17:20,028 INFO L93 Difference]: Finished difference Result 247 states and 249 transitions. [2018-09-30 20:17:20,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-30 20:17:20,028 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 162 [2018-09-30 20:17:20,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:17:20,029 INFO L225 Difference]: With dead ends: 247 [2018-09-30 20:17:20,029 INFO L226 Difference]: Without dead ends: 165 [2018-09-30 20:17:20,031 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5189 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=6438, Invalid=18684, Unknown=0, NotChecked=0, Total=25122 [2018-09-30 20:17:20,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-09-30 20:17:20,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-09-30 20:17:20,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-09-30 20:17:20,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2018-09-30 20:17:20,050 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 162 [2018-09-30 20:17:20,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:17:20,050 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2018-09-30 20:17:20,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-09-30 20:17:20,050 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2018-09-30 20:17:20,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-09-30 20:17:20,051 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:17:20,051 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 40, 39, 1, 1, 1, 1] [2018-09-30 20:17:20,051 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:17:20,051 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:17:20,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1175134783, now seen corresponding path program 58 times [2018-09-30 20:17:20,052 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:17:20,052 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:17:20,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:17:20,052 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:17:20,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:17:20,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:17:21,010 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 1640 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:17:21,010 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:17:21,010 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:17:21,020 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:17:21,150 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:17:21,150 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:17:21,155 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:17:21,247 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 1640 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:17:21,267 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:17:21,268 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 45 [2018-09-30 20:17:21,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 20:17:21,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 20:17:21,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 20:17:21,268 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand 46 states. [2018-09-30 20:17:22,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:17:22,246 INFO L93 Difference]: Finished difference Result 172 states and 174 transitions. [2018-09-30 20:17:22,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-30 20:17:22,246 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 164 [2018-09-30 20:17:22,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:17:22,247 INFO L225 Difference]: With dead ends: 172 [2018-09-30 20:17:22,247 INFO L226 Difference]: Without dead ends: 170 [2018-09-30 20:17:22,248 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1722 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2797, Invalid=4685, Unknown=0, NotChecked=0, Total=7482 [2018-09-30 20:17:22,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-09-30 20:17:22,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2018-09-30 20:17:22,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-09-30 20:17:22,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2018-09-30 20:17:22,269 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 164 [2018-09-30 20:17:22,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:17:22,270 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2018-09-30 20:17:22,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 20:17:22,270 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2018-09-30 20:17:22,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-09-30 20:17:22,271 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:17:22,271 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 41, 40, 1, 1, 1, 1] [2018-09-30 20:17:22,271 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:17:22,271 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:17:22,272 INFO L82 PathProgramCache]: Analyzing trace with hash 773999923, now seen corresponding path program 59 times [2018-09-30 20:17:22,272 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:17:22,272 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:17:22,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:17:22,272 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:17:22,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:17:22,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:17:24,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3362 backedges. 1722 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:17:24,720 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:17:24,720 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:17:24,728 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:17:24,927 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-09-30 20:17:24,927 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:17:24,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:17:27,513 INFO L134 CoverageAnalysis]: Checked inductivity of 3362 backedges. 1722 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:17:27,533 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:17:27,534 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 124 [2018-09-30 20:17:27,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 125 states [2018-09-30 20:17:27,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2018-09-30 20:17:27,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3568, Invalid=11932, Unknown=0, NotChecked=0, Total=15500 [2018-09-30 20:17:27,535 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand 125 states. [2018-09-30 20:17:29,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:17:29,455 INFO L93 Difference]: Finished difference Result 257 states and 259 transitions. [2018-09-30 20:17:29,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-30 20:17:29,455 INFO L78 Accepts]: Start accepts. Automaton has 125 states. Word has length 168 [2018-09-30 20:17:29,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:17:29,456 INFO L225 Difference]: With dead ends: 257 [2018-09-30 20:17:29,456 INFO L226 Difference]: Without dead ends: 171 [2018-09-30 20:17:29,457 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5660 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=6888, Invalid=20172, Unknown=0, NotChecked=0, Total=27060 [2018-09-30 20:17:29,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-30 20:17:29,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-09-30 20:17:29,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-09-30 20:17:29,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions. [2018-09-30 20:17:29,485 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 168 [2018-09-30 20:17:29,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:17:29,485 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 172 transitions. [2018-09-30 20:17:29,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has 125 states. [2018-09-30 20:17:29,486 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions. [2018-09-30 20:17:29,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-30 20:17:29,486 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:17:29,487 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 1, 1, 1, 1] [2018-09-30 20:17:29,487 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:17:29,487 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:17:29,487 INFO L82 PathProgramCache]: Analyzing trace with hash -926168017, now seen corresponding path program 60 times [2018-09-30 20:17:29,487 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:17:29,488 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:17:29,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:17:29,488 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:17:29,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:17:29,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:17:32,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 1722 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:17:32,117 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:17:32,117 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:17:32,125 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:17:32,336 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 42 check-sat command(s) [2018-09-30 20:17:32,337 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:17:32,341 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:17:35,169 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 1722 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:17:35,190 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:17:35,190 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 125 [2018-09-30 20:17:35,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-09-30 20:17:35,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-09-30 20:17:35,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3611, Invalid=12139, Unknown=0, NotChecked=0, Total=15750 [2018-09-30 20:17:35,192 INFO L87 Difference]: Start difference. First operand 171 states and 172 transitions. Second operand 126 states. [2018-09-30 20:17:36,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:17:36,935 INFO L93 Difference]: Finished difference Result 259 states and 261 transitions. [2018-09-30 20:17:36,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-30 20:17:36,936 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 170 [2018-09-30 20:17:36,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:17:36,937 INFO L225 Difference]: With dead ends: 259 [2018-09-30 20:17:36,937 INFO L226 Difference]: Without dead ends: 173 [2018-09-30 20:17:36,938 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5742 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=7096, Invalid=20626, Unknown=0, NotChecked=0, Total=27722 [2018-09-30 20:17:36,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-09-30 20:17:36,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-09-30 20:17:36,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-09-30 20:17:36,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 174 transitions. [2018-09-30 20:17:36,961 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 174 transitions. Word has length 170 [2018-09-30 20:17:36,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:17:36,962 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 174 transitions. [2018-09-30 20:17:36,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-09-30 20:17:36,962 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 174 transitions. [2018-09-30 20:17:36,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-09-30 20:17:36,963 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:17:36,963 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 42, 41, 1, 1, 1, 1] [2018-09-30 20:17:36,963 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:17:36,964 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:17:36,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1594981419, now seen corresponding path program 61 times [2018-09-30 20:17:36,964 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:17:36,964 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:17:36,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:17:36,965 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:17:36,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:17:37,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:17:37,852 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 1806 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:17:37,853 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:17:37,853 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:17:37,860 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:17:37,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:17:37,992 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:17:38,115 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 1806 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:17:38,135 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:17:38,135 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 47 [2018-09-30 20:17:38,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 20:17:38,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 20:17:38,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=1216, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 20:17:38,136 INFO L87 Difference]: Start difference. First operand 173 states and 174 transitions. Second operand 48 states. [2018-09-30 20:17:39,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:17:39,308 INFO L93 Difference]: Finished difference Result 180 states and 182 transitions. [2018-09-30 20:17:39,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-30 20:17:39,309 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 172 [2018-09-30 20:17:39,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:17:39,311 INFO L225 Difference]: With dead ends: 180 [2018-09-30 20:17:39,311 INFO L226 Difference]: Without dead ends: 178 [2018-09-30 20:17:39,312 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1892 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3062, Invalid=5128, Unknown=0, NotChecked=0, Total=8190 [2018-09-30 20:17:39,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-09-30 20:17:39,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2018-09-30 20:17:39,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-09-30 20:17:39,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2018-09-30 20:17:39,360 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 172 [2018-09-30 20:17:39,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:17:39,360 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2018-09-30 20:17:39,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 20:17:39,360 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2018-09-30 20:17:39,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-09-30 20:17:39,361 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:17:39,361 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 43, 42, 1, 1, 1, 1] [2018-09-30 20:17:39,361 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:17:39,361 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:17:39,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1196544287, now seen corresponding path program 62 times [2018-09-30 20:17:39,362 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:17:39,362 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:17:39,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:17:39,362 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:17:39,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:17:39,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:17:41,700 INFO L134 CoverageAnalysis]: Checked inductivity of 3698 backedges. 1892 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:17:41,700 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:17:41,700 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:17:41,710 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:17:41,831 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:17:41,831 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:17:41,836 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:17:45,046 INFO L134 CoverageAnalysis]: Checked inductivity of 3698 backedges. 1890 proven. 1806 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-30 20:17:45,066 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:17:45,066 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 86] total 129 [2018-09-30 20:17:45,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-09-30 20:17:45,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-09-30 20:17:45,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3827, Invalid=12943, Unknown=0, NotChecked=0, Total=16770 [2018-09-30 20:17:45,068 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand 130 states. [2018-09-30 20:17:46,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:17:46,899 INFO L93 Difference]: Finished difference Result 269 states and 271 transitions. [2018-09-30 20:17:46,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-30 20:17:46,899 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 176 [2018-09-30 20:17:46,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:17:46,900 INFO L225 Difference]: With dead ends: 269 [2018-09-30 20:17:46,900 INFO L226 Difference]: Without dead ends: 179 [2018-09-30 20:17:46,902 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6153 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=7481, Invalid=21931, Unknown=0, NotChecked=0, Total=29412 [2018-09-30 20:17:46,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-09-30 20:17:46,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-09-30 20:17:46,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-09-30 20:17:46,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 180 transitions. [2018-09-30 20:17:46,926 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 180 transitions. Word has length 176 [2018-09-30 20:17:46,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:17:46,926 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 180 transitions. [2018-09-30 20:17:46,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-09-30 20:17:46,926 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 180 transitions. [2018-09-30 20:17:46,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-09-30 20:17:46,927 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:17:46,927 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 43, 43, 1, 1, 1, 1] [2018-09-30 20:17:46,928 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:17:46,928 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:17:46,928 INFO L82 PathProgramCache]: Analyzing trace with hash -889547749, now seen corresponding path program 63 times [2018-09-30 20:17:46,928 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:17:46,928 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:17:46,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:17:46,929 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:17:46,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:17:46,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:17:49,610 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 1892 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:17:49,610 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:17:49,610 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:17:49,619 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:17:49,835 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 44 check-sat command(s) [2018-09-30 20:17:49,836 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:17:49,842 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:17:52,652 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 1892 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:17:52,674 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:17:52,674 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 131 [2018-09-30 20:17:52,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-09-30 20:17:52,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-09-30 20:17:52,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3959, Invalid=13333, Unknown=0, NotChecked=0, Total=17292 [2018-09-30 20:17:52,677 INFO L87 Difference]: Start difference. First operand 179 states and 180 transitions. Second operand 132 states. [2018-09-30 20:17:54,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:17:54,601 INFO L93 Difference]: Finished difference Result 271 states and 273 transitions. [2018-09-30 20:17:54,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-30 20:17:54,601 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 178 [2018-09-30 20:17:54,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:17:54,602 INFO L225 Difference]: With dead ends: 271 [2018-09-30 20:17:54,602 INFO L226 Difference]: Without dead ends: 181 [2018-09-30 20:17:54,603 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6323 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=7786, Invalid=22664, Unknown=0, NotChecked=0, Total=30450 [2018-09-30 20:17:54,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-09-30 20:17:54,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-09-30 20:17:54,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-09-30 20:17:54,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2018-09-30 20:17:54,626 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 178 [2018-09-30 20:17:54,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:17:54,626 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2018-09-30 20:17:54,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-09-30 20:17:54,627 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2018-09-30 20:17:54,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-09-30 20:17:54,627 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:17:54,627 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 44, 43, 1, 1, 1, 1] [2018-09-30 20:17:54,628 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:17:54,628 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:17:54,628 INFO L82 PathProgramCache]: Analyzing trace with hash 125732887, now seen corresponding path program 64 times [2018-09-30 20:17:54,628 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:17:54,628 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:17:54,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:17:54,629 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:17:54,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:17:54,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:17:55,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3872 backedges. 1980 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:17:55,655 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:17:55,655 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:17:55,662 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:17:55,807 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:17:55,808 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:17:55,813 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:17:55,885 INFO L134 CoverageAnalysis]: Checked inductivity of 3872 backedges. 1980 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:17:55,907 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:17:55,907 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47] total 49 [2018-09-30 20:17:55,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 20:17:55,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 20:17:55,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 20:17:55,908 INFO L87 Difference]: Start difference. First operand 181 states and 182 transitions. Second operand 50 states. [2018-09-30 20:17:57,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:17:57,042 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2018-09-30 20:17:57,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-30 20:17:57,042 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 180 [2018-09-30 20:17:57,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:17:57,044 INFO L225 Difference]: With dead ends: 188 [2018-09-30 20:17:57,044 INFO L226 Difference]: Without dead ends: 186 [2018-09-30 20:17:57,045 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2070 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3339, Invalid=5591, Unknown=0, NotChecked=0, Total=8930 [2018-09-30 20:17:57,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-09-30 20:17:57,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2018-09-30 20:17:57,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-09-30 20:17:57,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 186 transitions. [2018-09-30 20:17:57,077 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 186 transitions. Word has length 180 [2018-09-30 20:17:57,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:17:57,078 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 186 transitions. [2018-09-30 20:17:57,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 20:17:57,078 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 186 transitions. [2018-09-30 20:17:57,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-09-30 20:17:57,078 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:17:57,079 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 45, 44, 1, 1, 1, 1] [2018-09-30 20:17:57,079 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:17:57,079 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:17:57,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1723922677, now seen corresponding path program 65 times [2018-09-30 20:17:57,079 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:17:57,079 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:17:57,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:17:57,080 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:17:57,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:17:57,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:18:00,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4050 backedges. 2070 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:18:00,135 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:18:00,136 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:18:00,143 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:18:00,367 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-09-30 20:18:00,368 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:18:00,374 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:18:03,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4050 backedges. 2070 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:18:03,510 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:18:03,510 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 136 [2018-09-30 20:18:03,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 137 states [2018-09-30 20:18:03,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2018-09-30 20:18:03,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4276, Invalid=14356, Unknown=0, NotChecked=0, Total=18632 [2018-09-30 20:18:03,511 INFO L87 Difference]: Start difference. First operand 185 states and 186 transitions. Second operand 137 states. [2018-09-30 20:18:05,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:18:05,439 INFO L93 Difference]: Finished difference Result 281 states and 283 transitions. [2018-09-30 20:18:05,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-30 20:18:05,439 INFO L78 Accepts]: Start accepts. Automaton has 137 states. Word has length 184 [2018-09-30 20:18:05,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:18:05,440 INFO L225 Difference]: With dead ends: 281 [2018-09-30 20:18:05,440 INFO L226 Difference]: Without dead ends: 187 [2018-09-30 20:18:05,441 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6842 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=8280, Invalid=24300, Unknown=0, NotChecked=0, Total=32580 [2018-09-30 20:18:05,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-09-30 20:18:05,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-09-30 20:18:05,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-09-30 20:18:05,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 188 transitions. [2018-09-30 20:18:05,470 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 188 transitions. Word has length 184 [2018-09-30 20:18:05,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:18:05,471 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 188 transitions. [2018-09-30 20:18:05,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has 137 states. [2018-09-30 20:18:05,471 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 188 transitions. [2018-09-30 20:18:05,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-09-30 20:18:05,471 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:18:05,472 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 45, 45, 1, 1, 1, 1] [2018-09-30 20:18:05,472 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:18:05,472 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:18:05,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1000141305, now seen corresponding path program 66 times [2018-09-30 20:18:05,472 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:18:05,472 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:18:05,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:05,473 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:18:05,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:05,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:18:08,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 2070 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:18:08,117 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:18:08,118 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:18:08,125 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:18:08,361 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-09-30 20:18:08,361 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:18:08,367 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:18:11,661 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 2070 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:18:11,682 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:18:11,682 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 137 [2018-09-30 20:18:11,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-09-30 20:18:11,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-09-30 20:18:11,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4323, Invalid=14583, Unknown=0, NotChecked=0, Total=18906 [2018-09-30 20:18:11,684 INFO L87 Difference]: Start difference. First operand 187 states and 188 transitions. Second operand 138 states. [2018-09-30 20:18:13,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:18:13,829 INFO L93 Difference]: Finished difference Result 283 states and 285 transitions. [2018-09-30 20:18:13,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-30 20:18:13,829 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 186 [2018-09-30 20:18:13,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:18:13,829 INFO L225 Difference]: With dead ends: 283 [2018-09-30 20:18:13,830 INFO L226 Difference]: Without dead ends: 189 [2018-09-30 20:18:13,831 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6932 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=8508, Invalid=24798, Unknown=0, NotChecked=0, Total=33306 [2018-09-30 20:18:13,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-09-30 20:18:13,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-09-30 20:18:13,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-09-30 20:18:13,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2018-09-30 20:18:13,864 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 186 [2018-09-30 20:18:13,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:18:13,865 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2018-09-30 20:18:13,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-09-30 20:18:13,865 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2018-09-30 20:18:13,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-09-30 20:18:13,866 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:18:13,866 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 46, 45, 1, 1, 1, 1] [2018-09-30 20:18:13,866 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:18:13,866 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:18:13,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1230944765, now seen corresponding path program 67 times [2018-09-30 20:18:13,867 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:18:13,867 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:18:13,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:13,867 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:18:13,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:13,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:18:15,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 2162 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:18:15,143 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:18:15,143 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:18:15,150 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:18:15,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:18:15,303 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:18:15,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 2162 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:18:15,466 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:18:15,466 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49] total 51 [2018-09-30 20:18:15,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 20:18:15,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 20:18:15,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1230, Invalid=1422, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 20:18:15,467 INFO L87 Difference]: Start difference. First operand 189 states and 190 transitions. Second operand 52 states. [2018-09-30 20:18:16,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:18:16,654 INFO L93 Difference]: Finished difference Result 196 states and 198 transitions. [2018-09-30 20:18:16,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-30 20:18:16,654 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 188 [2018-09-30 20:18:16,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:18:16,655 INFO L225 Difference]: With dead ends: 196 [2018-09-30 20:18:16,656 INFO L226 Difference]: Without dead ends: 194 [2018-09-30 20:18:16,657 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2256 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3628, Invalid=6074, Unknown=0, NotChecked=0, Total=9702 [2018-09-30 20:18:16,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-09-30 20:18:16,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2018-09-30 20:18:16,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-09-30 20:18:16,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 194 transitions. [2018-09-30 20:18:16,683 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 194 transitions. Word has length 188 [2018-09-30 20:18:16,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:18:16,683 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 194 transitions. [2018-09-30 20:18:16,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 20:18:16,684 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 194 transitions. [2018-09-30 20:18:16,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-09-30 20:18:16,684 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:18:16,684 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 47, 46, 1, 1, 1, 1] [2018-09-30 20:18:16,685 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:18:16,685 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:18:16,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1538846455, now seen corresponding path program 68 times [2018-09-30 20:18:16,685 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:18:16,685 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:18:16,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:16,686 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:18:16,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:16,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:18:19,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4418 backedges. 2256 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:18:19,738 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:18:19,738 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:18:19,745 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:18:19,890 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:18:19,890 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:18:19,895 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:18:23,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4418 backedges. 2254 proven. 2162 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-30 20:18:23,160 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:18:23,161 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 94] total 141 [2018-09-30 20:18:23,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-09-30 20:18:23,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-09-30 20:18:23,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4559, Invalid=15463, Unknown=0, NotChecked=0, Total=20022 [2018-09-30 20:18:23,163 INFO L87 Difference]: Start difference. First operand 193 states and 194 transitions. Second operand 142 states. [2018-09-30 20:18:25,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:18:25,569 INFO L93 Difference]: Finished difference Result 293 states and 295 transitions. [2018-09-30 20:18:25,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-30 20:18:25,569 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 192 [2018-09-30 20:18:25,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:18:25,570 INFO L225 Difference]: With dead ends: 293 [2018-09-30 20:18:25,570 INFO L226 Difference]: Without dead ends: 195 [2018-09-30 20:18:25,571 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7383 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=8929, Invalid=26227, Unknown=0, NotChecked=0, Total=35156 [2018-09-30 20:18:25,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-09-30 20:18:25,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-09-30 20:18:25,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-09-30 20:18:25,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 196 transitions. [2018-09-30 20:18:25,598 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 196 transitions. Word has length 192 [2018-09-30 20:18:25,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:18:25,598 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 196 transitions. [2018-09-30 20:18:25,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-09-30 20:18:25,598 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 196 transitions. [2018-09-30 20:18:25,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-09-30 20:18:25,599 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:18:25,599 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 47, 47, 1, 1, 1, 1] [2018-09-30 20:18:25,599 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:18:25,599 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:18:25,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1328268813, now seen corresponding path program 69 times [2018-09-30 20:18:25,599 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:18:25,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:18:25,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:25,600 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:18:25,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:25,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:18:28,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 2256 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:18:28,387 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:18:28,387 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:18:28,394 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:18:28,645 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-09-30 20:18:28,645 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:18:28,651 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:18:32,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 2256 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:18:32,339 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:18:32,340 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 143 [2018-09-30 20:18:32,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-09-30 20:18:32,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-09-30 20:18:32,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4703, Invalid=15889, Unknown=0, NotChecked=0, Total=20592 [2018-09-30 20:18:32,341 INFO L87 Difference]: Start difference. First operand 195 states and 196 transitions. Second operand 144 states. [2018-09-30 20:18:35,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:18:35,018 INFO L93 Difference]: Finished difference Result 295 states and 297 transitions. [2018-09-30 20:18:35,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-30 20:18:35,018 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 194 [2018-09-30 20:18:35,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:18:35,019 INFO L225 Difference]: With dead ends: 295 [2018-09-30 20:18:35,019 INFO L226 Difference]: Without dead ends: 197 [2018-09-30 20:18:35,020 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7569 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=9262, Invalid=27028, Unknown=0, NotChecked=0, Total=36290 [2018-09-30 20:18:35,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-09-30 20:18:35,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2018-09-30 20:18:35,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-09-30 20:18:35,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2018-09-30 20:18:35,047 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 194 [2018-09-30 20:18:35,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:18:35,047 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2018-09-30 20:18:35,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-09-30 20:18:35,047 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2018-09-30 20:18:35,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-09-30 20:18:35,048 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:18:35,048 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 48, 47, 1, 1, 1, 1] [2018-09-30 20:18:35,048 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:18:35,048 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:18:35,049 INFO L82 PathProgramCache]: Analyzing trace with hash 742962671, now seen corresponding path program 70 times [2018-09-30 20:18:35,049 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:18:35,049 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:18:35,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:35,049 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:18:35,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:35,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:18:36,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4608 backedges. 2352 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:18:36,156 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:18:36,157 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:18:36,163 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:18:36,314 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:18:36,315 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:18:36,320 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:18:36,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4608 backedges. 2352 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:18:36,424 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:18:36,425 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51] total 53 [2018-09-30 20:18:36,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 20:18:36,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 20:18:36,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 20:18:36,426 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand 54 states. [2018-09-30 20:18:37,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:18:37,765 INFO L93 Difference]: Finished difference Result 204 states and 206 transitions. [2018-09-30 20:18:37,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-30 20:18:37,766 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 196 [2018-09-30 20:18:37,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:18:37,767 INFO L225 Difference]: With dead ends: 204 [2018-09-30 20:18:37,767 INFO L226 Difference]: Without dead ends: 202 [2018-09-30 20:18:37,768 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2450 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3929, Invalid=6577, Unknown=0, NotChecked=0, Total=10506 [2018-09-30 20:18:37,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2018-09-30 20:18:37,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 201. [2018-09-30 20:18:37,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-09-30 20:18:37,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 202 transitions. [2018-09-30 20:18:37,798 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 202 transitions. Word has length 196 [2018-09-30 20:18:37,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:18:37,798 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 202 transitions. [2018-09-30 20:18:37,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 20:18:37,799 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 202 transitions. [2018-09-30 20:18:37,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-09-30 20:18:37,799 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:18:37,799 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 49, 48, 1, 1, 1, 1] [2018-09-30 20:18:37,800 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:18:37,800 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:18:37,800 INFO L82 PathProgramCache]: Analyzing trace with hash -821131037, now seen corresponding path program 71 times [2018-09-30 20:18:37,800 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:18:37,800 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:18:37,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:37,801 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:18:37,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:37,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:18:41,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4802 backedges. 2450 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:18:41,232 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:18:41,233 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:18:41,240 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:18:41,517 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 50 check-sat command(s) [2018-09-30 20:18:41,517 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:18:41,525 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:18:45,293 INFO L134 CoverageAnalysis]: Checked inductivity of 4802 backedges. 2450 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:18:45,316 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:18:45,316 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 148 [2018-09-30 20:18:45,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 149 states [2018-09-30 20:18:45,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2018-09-30 20:18:45,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5048, Invalid=17004, Unknown=0, NotChecked=0, Total=22052 [2018-09-30 20:18:45,318 INFO L87 Difference]: Start difference. First operand 201 states and 202 transitions. Second operand 149 states. [2018-09-30 20:18:47,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:18:47,763 INFO L93 Difference]: Finished difference Result 305 states and 307 transitions. [2018-09-30 20:18:47,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-30 20:18:47,763 INFO L78 Accepts]: Start accepts. Automaton has 149 states. Word has length 200 [2018-09-30 20:18:47,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:18:47,764 INFO L225 Difference]: With dead ends: 305 [2018-09-30 20:18:47,764 INFO L226 Difference]: Without dead ends: 203 [2018-09-30 20:18:47,765 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8136 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=9800, Invalid=28812, Unknown=0, NotChecked=0, Total=38612 [2018-09-30 20:18:47,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-09-30 20:18:47,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-09-30 20:18:47,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-09-30 20:18:47,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 204 transitions. [2018-09-30 20:18:47,804 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 204 transitions. Word has length 200 [2018-09-30 20:18:47,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:18:47,805 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 204 transitions. [2018-09-30 20:18:47,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has 149 states. [2018-09-30 20:18:47,805 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 204 transitions. [2018-09-30 20:18:47,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-09-30 20:18:47,806 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:18:47,806 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 49, 49, 1, 1, 1, 1] [2018-09-30 20:18:47,806 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:18:47,806 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:18:47,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1801644065, now seen corresponding path program 72 times [2018-09-30 20:18:47,807 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:18:47,807 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:18:47,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:47,807 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:18:47,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:47,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-30 20:18:47,882 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,883 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,883 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,883 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,884 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,884 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,884 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,884 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,884 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,885 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,885 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,885 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,885 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,886 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,886 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,886 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,886 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,887 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,887 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,887 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,887 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,887 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,888 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,888 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,888 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,888 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,889 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,889 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,889 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,889 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,889 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,890 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,890 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,890 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,890 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,891 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,891 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,891 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,891 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,892 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,892 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,892 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,893 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,893 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,893 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,893 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,893 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,894 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,894 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,894 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,894 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,895 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,895 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,895 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,895 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,895 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,896 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,896 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,896 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,896 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,897 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,897 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,897 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,897 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,898 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,898 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,898 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,898 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,898 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,899 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,899 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,899 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,899 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,900 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,900 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,900 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,900 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,900 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,901 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,901 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,901 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,901 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,901 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,902 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,902 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,902 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,902 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,903 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,903 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,903 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,903 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,903 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,904 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,904 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,904 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,904 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,904 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,905 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,905 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,905 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,905 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,906 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,906 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,906 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,906 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,906 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,907 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,907 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,907 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,907 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,908 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,908 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,908 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,908 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,909 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,909 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,909 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,909 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,909 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,910 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,910 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,910 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,911 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,911 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,911 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,911 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,911 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,912 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,912 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,912 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,912 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,912 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,912 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,913 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,913 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,913 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,913 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,913 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,913 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,914 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,914 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,914 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,914 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,914 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,914 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,914 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,915 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,915 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,915 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,915 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,915 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,915 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,916 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,916 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,916 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,916 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,917 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,917 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,917 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,917 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,918 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,918 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,918 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,918 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,918 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,919 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,919 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,919 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,919 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,920 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,920 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,920 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,920 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,920 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,921 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,921 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,921 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,921 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,921 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,922 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,922 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,922 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,922 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,923 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,923 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,923 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,923 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,923 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,924 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,924 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,924 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,924 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-30 20:18:47,938 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 20:18:47,942 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 20:18:47,942 INFO L202 PluginConnector]: Adding new model fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 08:18:47 BoogieIcfgContainer [2018-09-30 20:18:47,942 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 20:18:47,943 INFO L168 Benchmark]: Toolchain (without parser) took 234726.77 ms. Allocated memory was 1.5 GB in the beginning and 1.8 GB in the end (delta: 254.3 MB). Free memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: -98.2 MB). Peak memory consumption was 156.0 MB. Max. memory is 7.1 GB. [2018-09-30 20:18:47,944 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.26 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:18:47,944 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.02 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:18:47,944 INFO L168 Benchmark]: Boogie Preprocessor took 22.43 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:18:47,945 INFO L168 Benchmark]: RCFGBuilder took 371.89 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-30 20:18:47,945 INFO L168 Benchmark]: TraceAbstraction took 234286.25 ms. Allocated memory was 1.5 GB in the beginning and 1.8 GB in the end (delta: 254.3 MB). Free memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: -119.4 MB). Peak memory consumption was 134.9 MB. Max. memory is 7.1 GB. [2018-09-30 20:18:47,948 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 0.26 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 40.02 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 22.43 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 371.89 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 234286.25 ms. Allocated memory was 1.5 GB in the beginning and 1.8 GB in the end (delta: 254.3 MB). Free memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: -119.4 MB). Peak memory consumption was 134.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 75]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 75). Cancelled while BasicCegarLoop was analyzing trace of length 203 with TraceHistMax 50, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while NestedInterpolantsBuilder was constructing predicates for 201 interpolants. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. TIMEOUT Result, 234.2s OverallTime, 74 OverallIterations, 50 TraceHistogramMax, 66.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2093 SDtfs, 1795 SDslu, 26489 SDs, 0 SdLazy, 27395 SolverSat, 3987 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 19.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13008 GetRequests, 6886 SyntacticMatches, 0 SemanticMatches, 6122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152951 ImplicationChecksByTransitivity, 186.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=203occurred in iteration=73, 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: 1.0s AutomataMinimizationTime, 73 MinimizatonAttempts, 24 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.0s SsaConstructionTime, 8.4s SatisfiabilityAnalysisTime, 153.7s InterpolantComputationTime, 15058 NumberOfCodeBlocks, 15058 NumberOfCodeBlocksAsserted, 1067 NumberOfCheckSat, 14914 ConstructedInterpolants, 0 QuantifiedInterpolants, 7837611 SizeOfPredicates, 213 NumberOfNonLiveVariables, 40803 ConjunctsInSsa, 3890 ConjunctsInUnsatCore, 144 InterpolantComputations, 2 PerfectInterpolantSequences, 121274/237670 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/fragtest_simple.i_4.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-30_20-18-47-957.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/fragtest_simple.i_4.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-30_20-18-47-957.csv Completed graceful shutdown