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 -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/float-benchs/Muller_Kahan_true-unreach-call_true-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2c62905 [2018-09-19 15:40:08,684 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-19 15:40:08,686 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-19 15:40:08,706 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-19 15:40:08,706 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-19 15:40:08,707 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-19 15:40:08,709 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-19 15:40:08,712 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-19 15:40:08,714 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-19 15:40:08,715 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-19 15:40:08,725 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-19 15:40:08,725 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-19 15:40:08,726 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-19 15:40:08,731 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-19 15:40:08,732 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-19 15:40:08,734 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-19 15:40:08,736 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-19 15:40:08,740 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-19 15:40:08,742 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-19 15:40:08,750 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-19 15:40:08,752 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-19 15:40:08,753 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-19 15:40:08,758 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-19 15:40:08,758 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-19 15:40:08,759 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-19 15:40:08,760 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-19 15:40:08,762 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-19 15:40:08,763 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-19 15:40:08,764 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-19 15:40:08,766 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-19 15:40:08,766 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-19 15:40:08,767 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-19 15:40:08,767 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-19 15:40:08,769 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-19 15:40:08,770 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-19 15:40:08,771 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-19 15:40:08,772 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf [2018-09-19 15:40:08,801 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-19 15:40:08,801 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-19 15:40:08,802 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-19 15:40:08,802 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-19 15:40:08,803 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-19 15:40:08,803 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-19 15:40:08,803 INFO L133 SettingsManager]: * Use SBE=true [2018-09-19 15:40:08,804 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-19 15:40:08,804 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-19 15:40:08,804 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-19 15:40:08,804 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-19 15:40:08,805 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-19 15:40:08,806 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-19 15:40:08,806 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-19 15:40:08,806 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-09-19 15:40:08,806 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-09-19 15:40:08,807 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-19 15:40:08,807 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-19 15:40:08,807 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-19 15:40:08,807 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-19 15:40:08,807 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-19 15:40:08,808 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-19 15:40:08,808 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-19 15:40:08,808 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-19 15:40:08,808 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-19 15:40:08,809 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-19 15:40:08,809 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-19 15:40:08,809 INFO L133 SettingsManager]: * Trace refinement strategy=WOLF [2018-09-19 15:40:08,809 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-19 15:40:08,811 INFO L133 SettingsManager]: * Command for external solver=cvc4nyu --tear-down-incremental --rewrite-divk --print-success --lang smt [2018-09-19 15:40:08,811 INFO L133 SettingsManager]: * Logic for external solver=AUFBV [2018-09-19 15:40:08,812 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-19 15:40:08,880 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-19 15:40:08,895 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-19 15:40:08,900 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-19 15:40:08,902 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-19 15:40:08,903 INFO L276 PluginConnector]: CDTParser initialized [2018-09-19 15:40:08,903 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/Muller_Kahan_true-unreach-call_true-termination.c [2018-09-19 15:40:09,315 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d1a300fc/3e76a5f2f9e5487e99d11baced3fd5eb/FLAG88e1b4a8d [2018-09-19 15:40:09,479 INFO L277 CDTParser]: Found 1 translation units. [2018-09-19 15:40:09,479 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/Muller_Kahan_true-unreach-call_true-termination.c [2018-09-19 15:40:09,487 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d1a300fc/3e76a5f2f9e5487e99d11baced3fd5eb/FLAG88e1b4a8d [2018-09-19 15:40:09,502 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d1a300fc/3e76a5f2f9e5487e99d11baced3fd5eb [2018-09-19 15:40:09,513 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-19 15:40:09,516 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-19 15:40:09,517 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-19 15:40:09,518 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-19 15:40:09,525 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-19 15:40:09,526 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.09 03:40:09" (1/1) ... [2018-09-19 15:40:09,529 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68a2763a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.09 03:40:09, skipping insertion in model container [2018-09-19 15:40:09,529 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.09 03:40:09" (1/1) ... [2018-09-19 15:40:09,542 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-19 15:40:09,803 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-19 15:40:09,825 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-19 15:40:09,832 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-19 15:40:09,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.09 03:40:09 WrapperNode [2018-09-19 15:40:09,849 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-19 15:40:09,849 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-19 15:40:09,849 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-19 15:40:09,850 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-19 15:40:09,866 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.09 03:40:09" (1/1) ... [2018-09-19 15:40:09,866 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.09 03:40:09" (1/1) ... [2018-09-19 15:40:09,875 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.09 03:40:09" (1/1) ... [2018-09-19 15:40:09,876 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.09 03:40:09" (1/1) ... [2018-09-19 15:40:09,879 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.09 03:40:09" (1/1) ... [2018-09-19 15:40:09,884 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.09 03:40:09" (1/1) ... [2018-09-19 15:40:09,886 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.09 03:40:09" (1/1) ... [2018-09-19 15:40:09,889 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-19 15:40:09,890 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-19 15:40:09,890 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-19 15:40:09,890 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-19 15:40:09,891 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.09 03:40:09" (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 [2018-09-19 15:40:09,971 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-19 15:40:09,971 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-19 15:40:09,972 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-09-19 15:40:09,972 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-19 15:40:09,972 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-09-19 15:40:09,972 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-09-19 15:40:09,972 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-19 15:40:09,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-19 15:40:09,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-19 15:40:12,991 INFO L356 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-19 15:40:12,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.09 03:40:12 BoogieIcfgContainer [2018-09-19 15:40:12,992 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-19 15:40:12,993 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-19 15:40:12,994 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-19 15:40:12,997 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-19 15:40:12,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.09 03:40:09" (1/3) ... [2018-09-19 15:40:12,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e11bdb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.09 03:40:12, skipping insertion in model container [2018-09-19 15:40:12,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.09 03:40:09" (2/3) ... [2018-09-19 15:40:12,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e11bdb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.09 03:40:12, skipping insertion in model container [2018-09-19 15:40:12,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.09 03:40:12" (3/3) ... [2018-09-19 15:40:13,002 INFO L112 eAbstractionObserver]: Analyzing ICFG Muller_Kahan_true-unreach-call_true-termination.c [2018-09-19 15:40:13,012 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-19 15:40:13,022 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-19 15:40:13,098 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-19 15:40:13,099 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-19 15:40:13,099 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-19 15:40:13,099 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-19 15:40:13,099 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-19 15:40:13,100 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-19 15:40:13,103 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-19 15:40:13,103 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-19 15:40:13,103 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-19 15:40:13,128 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-09-19 15:40:13,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-19 15:40:13,135 INFO L368 BasicCegarLoop]: Found error trace [2018-09-19 15:40:13,139 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-19 15:40:13,145 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-19 15:40:13,155 INFO L82 PathProgramCache]: Analyzing trace with hash 563245249, now seen corresponding path program 1 times [2018-09-19 15:40:13,161 INFO L227 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-09-19 15:40:13,162 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2018-09-19 15:40:13,194 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-19 15:40:13,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-19 15:40:13,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-19 15:40:13,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-19 15:40:13,259 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-09-19 15:40:13,275 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-19 15:40:13,275 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-19 15:40:13,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-09-19 15:40:13,291 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-09-19 15:40:13,292 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-09-19 15:40:13,294 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2018-09-19 15:40:13,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-19 15:40:13,321 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2018-09-19 15:40:13,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-09-19 15:40:13,322 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-09-19 15:40:13,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-19 15:40:13,332 INFO L225 Difference]: With dead ends: 32 [2018-09-19 15:40:13,332 INFO L226 Difference]: Without dead ends: 13 [2018-09-19 15:40:13,336 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-09-19 15:40:13,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-19 15:40:13,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-19 15:40:13,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-19 15:40:13,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-19 15:40:13,376 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-09-19 15:40:13,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-19 15:40:13,377 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-19 15:40:13,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-09-19 15:40:13,377 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-19 15:40:13,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-19 15:40:13,378 INFO L368 BasicCegarLoop]: Found error trace [2018-09-19 15:40:13,378 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-19 15:40:13,378 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-19 15:40:13,379 INFO L82 PathProgramCache]: Analyzing trace with hash -496423, now seen corresponding path program 1 times [2018-09-19 15:40:13,379 INFO L227 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-09-19 15:40:13,379 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2018-09-19 15:40:13,393 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-19 15:40:13,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-19 15:40:13,418 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-19 15:40:13,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-19 15:40:13,452 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-09-19 15:40:13,464 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-19 15:40:13,464 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-19 15:40:13,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-19 15:40:13,466 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-19 15:40:13,467 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-19 15:40:13,467 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 3 states. [2018-09-19 15:40:17,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-19 15:40:17,527 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-09-19 15:40:17,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-19 15:40:17,528 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-09-19 15:40:17,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-19 15:40:17,529 INFO L225 Difference]: With dead ends: 20 [2018-09-19 15:40:17,529 INFO L226 Difference]: Without dead ends: 15 [2018-09-19 15:40:17,531 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-19 15:40:17,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-19 15:40:17,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-19 15:40:17,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-19 15:40:17,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-19 15:40:17,536 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2018-09-19 15:40:17,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-19 15:40:17,536 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-19 15:40:17,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-19 15:40:17,536 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-19 15:40:17,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-19 15:40:17,537 INFO L368 BasicCegarLoop]: Found error trace [2018-09-19 15:40:17,537 INFO L376 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-19 15:40:17,537 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-19 15:40:17,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1177044387, now seen corresponding path program 1 times [2018-09-19 15:40:17,538 INFO L227 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-09-19 15:40:17,538 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2018-09-19 15:40:17,548 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2018-09-19 15:40:19,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-19 15:40:19,756 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-19 15:40:19,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-19 15:40:19,803 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-19 15:40:19,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-19 15:40:19,913 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-19 15:40:19,914 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-09-19 15:40:19,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-19 15:40:19,914 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-19 15:40:19,914 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-09-19 15:40:19,915 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 6 states. [2018-09-19 15:40:27,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-19 15:40:27,865 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2018-09-19 15:40:27,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-19 15:40:27,867 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2018-09-19 15:40:27,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-19 15:40:27,868 INFO L225 Difference]: With dead ends: 26 [2018-09-19 15:40:27,868 INFO L226 Difference]: Without dead ends: 21 [2018-09-19 15:40:27,869 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-09-19 15:40:27,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-19 15:40:27,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-19 15:40:27,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-19 15:40:27,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-19 15:40:27,874 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 14 [2018-09-19 15:40:27,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-19 15:40:27,875 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-19 15:40:27,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-19 15:40:27,875 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-19 15:40:27,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-19 15:40:27,876 INFO L368 BasicCegarLoop]: Found error trace [2018-09-19 15:40:27,876 INFO L376 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-19 15:40:27,876 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-19 15:40:27,877 INFO L82 PathProgramCache]: Analyzing trace with hash -169763, now seen corresponding path program 2 times [2018-09-19 15:40:27,877 INFO L227 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-09-19 15:40:27,877 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2018-09-19 15:40:27,882 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-09-19 15:40:34,165 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-19 15:40:34,166 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-19 15:40:34,600 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-19 15:40:34,815 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-19 15:40:34,815 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-19 15:40:35,164 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-19 15:40:35,228 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-19 15:40:35,228 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-09-19 15:40:35,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-19 15:40:35,229 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-19 15:40:35,229 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2018-09-19 15:40:35,230 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 10 states. [2018-09-19 15:40:51,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-19 15:40:51,684 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2018-09-19 15:40:51,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-19 15:40:51,685 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2018-09-19 15:40:51,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-19 15:40:51,687 INFO L225 Difference]: With dead ends: 38 [2018-09-19 15:40:51,687 INFO L226 Difference]: Without dead ends: 33 [2018-09-19 15:40:51,688 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2018-09-19 15:40:51,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-19 15:40:51,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-19 15:40:51,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-19 15:40:51,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-19 15:40:51,696 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 20 [2018-09-19 15:40:51,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-19 15:40:51,696 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-19 15:40:51,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-19 15:40:51,697 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-19 15:40:51,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-19 15:40:51,698 INFO L368 BasicCegarLoop]: Found error trace [2018-09-19 15:40:51,698 INFO L376 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-19 15:40:51,698 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-19 15:40:51,699 INFO L82 PathProgramCache]: Analyzing trace with hash -866507299, now seen corresponding path program 3 times [2018-09-19 15:40:51,700 INFO L227 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-09-19 15:40:51,700 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2018-09-19 15:40:51,707 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2018-09-19 15:42:55,504 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-19 15:42:55,505 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-19 15:42:56,612 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-19 15:42:56,828 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-19 15:42:56,829 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-19 15:42:57,818 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-19 15:42:58,004 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-19 15:42:58,005 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2018-09-19 15:42:58,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-19 15:42:58,006 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-19 15:42:58,006 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2018-09-19 15:42:58,007 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 19 states. [2018-09-19 15:43:30,431 WARN L178 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 9 [2018-09-19 15:43:30,767 WARN L178 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 7 [2018-09-19 15:43:31,045 WARN L178 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 9 [2018-09-19 15:43:31,682 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 7 [2018-09-19 15:43:32,949 WARN L178 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2018-09-19 15:43:32,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-19 15:43:32,952 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2018-09-19 15:43:32,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-19 15:43:32,953 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 32 [2018-09-19 15:43:32,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-19 15:43:32,954 INFO L225 Difference]: With dead ends: 62 [2018-09-19 15:43:32,955 INFO L226 Difference]: Without dead ends: 57 [2018-09-19 15:43:32,956 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=357, Invalid=635, Unknown=0, NotChecked=0, Total=992 [2018-09-19 15:43:32,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-19 15:43:32,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-19 15:43:32,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-19 15:43:32,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-19 15:43:32,968 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 32 [2018-09-19 15:43:32,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-19 15:43:32,969 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-19 15:43:32,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-19 15:43:32,969 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-19 15:43:32,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-19 15:43:32,971 INFO L368 BasicCegarLoop]: Found error trace [2018-09-19 15:43:32,971 INFO L376 BasicCegarLoop]: trace histogram [16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-19 15:43:32,972 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-19 15:43:32,972 INFO L82 PathProgramCache]: Analyzing trace with hash -877060131, now seen corresponding path program 4 times [2018-09-19 15:43:32,973 INFO L227 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-09-19 15:43:32,973 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2018-09-19 15:43:32,985 INFO L101 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-19 15:44:06,277 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-19 15:44:06,277 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-19 15:44:08,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-19 15:44:08,903 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-19 15:44:08,903 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-19 15:44:10,096 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP mathsat -unsat_core_generation=3 (7)] Forcibly destroying the process [2018-09-19 15:44:10,298 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-19 15:44:10,298 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2018-09-19 15:44:10,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-19 15:44:10,299 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-19 15:44:10,300 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2018-09-19 15:44:10,303 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 34 states. Received shutdown request... [2018-09-19 15:45:03,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-19 15:45:03,858 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-19 15:45:03,863 WARN L206 ceAbstractionStarter]: Timeout [2018-09-19 15:45:03,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.09 03:45:03 BoogieIcfgContainer [2018-09-19 15:45:03,864 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-19 15:45:03,865 INFO L168 Benchmark]: Toolchain (without parser) took 294351.07 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 748.2 MB). Free memory was 1.4 GB in the beginning and 1.8 GB in the end (delta: -357.1 MB). Peak memory consumption was 391.1 MB. Max. memory is 7.1 GB. [2018-09-19 15:45:03,866 INFO L168 Benchmark]: CDTParser took 0.28 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. [2018-09-19 15:45:03,867 INFO L168 Benchmark]: CACSL2BoogieTranslator took 331.51 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-09-19 15:45:03,867 INFO L168 Benchmark]: Boogie Preprocessor took 39.81 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-19 15:45:03,868 INFO L168 Benchmark]: RCFGBuilder took 3102.87 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 748.2 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -787.9 MB). Peak memory consumption was 27.0 MB. Max. memory is 7.1 GB. [2018-09-19 15:45:03,869 INFO L168 Benchmark]: TraceAbstraction took 290870.69 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.8 GB in the end (delta: 420.3 MB). Peak memory consumption was 420.3 MB. Max. memory is 7.1 GB. [2018-09-19 15:45:03,872 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 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. * CACSL2BoogieTranslator took 331.51 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 39.81 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 3102.87 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 748.2 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -787.9 MB). Peak memory consumption was 27.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 290870.69 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.8 GB in the end (delta: 420.3 MB). Peak memory consumption was 420.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 10]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 10). Cancelled while BasicCegarLoop was constructing difference of abstraction (57states) and FLOYD_HOARE automaton (currently 15 states, 34 states before enhancement), while ReachableStatesComputation was computing reachable states (43 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. TIMEOUT Result, 290.7s OverallTime, 6 OverallIterations, 16 TraceHistogramMax, 117.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 94 SDtfs, 14 SDslu, 489 SDs, 0 SdLazy, 315 SolverSat, 69 SolverUnsat, 28 SolverUnknown, 0 SolverNotchecked, 90.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 276 GetRequests, 196 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 8.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 165.4s SatisfiabilityAnalysisTime, 7.4s InterpolantComputationTime, 143 NumberOfCodeBlocks, 143 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 255 ConstructedInterpolants, 0 QuantifiedInterpolants, 37883 SizeOfPredicates, 5 NumberOfNonLiveVariables, 281 ConjunctsInSsa, 38 ConjunctsInUnsatCore, 10 InterpolantComputations, 2 PerfectInterpolantSequences, 0/878 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown