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/feedback_diverge_true-unreach-call_true-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2c62905 [2018-09-19 15:41:00,602 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-19 15:41:00,604 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-19 15:41:00,616 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-19 15:41:00,617 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-19 15:41:00,618 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-19 15:41:00,619 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-19 15:41:00,621 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-19 15:41:00,622 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-19 15:41:00,623 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-19 15:41:00,624 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-19 15:41:00,624 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-19 15:41:00,625 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-19 15:41:00,626 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-19 15:41:00,627 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-19 15:41:00,628 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-19 15:41:00,629 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-19 15:41:00,631 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-19 15:41:00,633 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-19 15:41:00,634 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-19 15:41:00,636 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-19 15:41:00,637 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-19 15:41:00,639 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-19 15:41:00,639 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-19 15:41:00,639 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-19 15:41:00,640 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-19 15:41:00,641 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-19 15:41:00,642 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-19 15:41:00,643 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-19 15:41:00,644 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-19 15:41:00,644 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-19 15:41:00,645 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-19 15:41:00,645 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-19 15:41:00,645 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-19 15:41:00,646 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-19 15:41:00,647 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-19 15:41:00,647 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 15:41:00,662 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-19 15:41:00,662 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-19 15:41:00,663 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-19 15:41:00,663 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-19 15:41:00,664 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-19 15:41:00,664 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-19 15:41:00,664 INFO L133 SettingsManager]: * Use SBE=true [2018-09-19 15:41:00,664 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-19 15:41:00,664 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-19 15:41:00,665 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-19 15:41:00,665 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-19 15:41:00,665 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-19 15:41:00,665 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-19 15:41:00,665 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-19 15:41:00,666 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-09-19 15:41:00,666 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-09-19 15:41:00,666 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-19 15:41:00,666 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-19 15:41:00,666 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-19 15:41:00,667 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-19 15:41:00,667 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-19 15:41:00,667 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-19 15:41:00,667 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-19 15:41:00,667 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-19 15:41:00,668 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-19 15:41:00,668 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-19 15:41:00,668 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-19 15:41:00,668 INFO L133 SettingsManager]: * Trace refinement strategy=WOLF [2018-09-19 15:41:00,668 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-19 15:41:00,669 INFO L133 SettingsManager]: * Command for external solver=cvc4nyu --tear-down-incremental --rewrite-divk --print-success --lang smt [2018-09-19 15:41:00,669 INFO L133 SettingsManager]: * Logic for external solver=AUFBV [2018-09-19 15:41:00,669 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-19 15:41:00,729 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-19 15:41:00,747 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-19 15:41:00,751 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-19 15:41:00,753 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-19 15:41:00,753 INFO L276 PluginConnector]: CDTParser initialized [2018-09-19 15:41:00,755 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/feedback_diverge_true-unreach-call_true-termination.c [2018-09-19 15:41:01,111 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ccfb537c/69b3930d0c8b4fcd83939a6c7c6c6edd/FLAGe31c5d210 [2018-09-19 15:41:01,295 INFO L277 CDTParser]: Found 1 translation units. [2018-09-19 15:41:01,296 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/feedback_diverge_true-unreach-call_true-termination.c [2018-09-19 15:41:01,305 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ccfb537c/69b3930d0c8b4fcd83939a6c7c6c6edd/FLAGe31c5d210 [2018-09-19 15:41:01,330 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ccfb537c/69b3930d0c8b4fcd83939a6c7c6c6edd [2018-09-19 15:41:01,344 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-19 15:41:01,348 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-19 15:41:01,349 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-19 15:41:01,349 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-19 15:41:01,360 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-19 15:41:01,361 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.09 03:41:01" (1/1) ... [2018-09-19 15:41:01,365 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41e23d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.09 03:41:01, skipping insertion in model container [2018-09-19 15:41:01,366 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.09 03:41:01" (1/1) ... [2018-09-19 15:41:01,379 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-19 15:41:01,608 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-19 15:41:01,629 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-19 15:41:01,637 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-19 15:41:01,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.09 03:41:01 WrapperNode [2018-09-19 15:41:01,655 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-19 15:41:01,656 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-19 15:41:01,656 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-19 15:41:01,656 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-19 15:41:01,672 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.09 03:41:01" (1/1) ... [2018-09-19 15:41:01,672 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.09 03:41:01" (1/1) ... [2018-09-19 15:41:01,687 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.09 03:41:01" (1/1) ... [2018-09-19 15:41:01,687 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.09 03:41:01" (1/1) ... [2018-09-19 15:41:01,694 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.09 03:41:01" (1/1) ... [2018-09-19 15:41:01,700 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.09 03:41:01" (1/1) ... [2018-09-19 15:41:01,701 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.09 03:41:01" (1/1) ... [2018-09-19 15:41:01,704 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-19 15:41:01,705 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-19 15:41:01,705 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-19 15:41:01,706 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-19 15:41:01,707 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.09 03:41:01" (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 15:41:01,777 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-19 15:41:01,777 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-19 15:41:01,777 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-09-19 15:41:01,778 INFO L138 BoogieDeclarations]: Found implementation of procedure wait_for_clock [2018-09-19 15:41:01,778 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-19 15:41:01,778 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-09-19 15:41:01,778 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-09-19 15:41:01,778 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2018-09-19 15:41:01,779 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2018-09-19 15:41:01,779 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-09-19 15:41:01,779 INFO L130 BoogieDeclarations]: Found specification of procedure wait_for_clock [2018-09-19 15:41:01,779 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-19 15:41:01,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-19 15:41:01,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-19 15:41:02,854 INFO L356 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-19 15:41:02,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.09 03:41:02 BoogieIcfgContainer [2018-09-19 15:41:02,855 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-19 15:41:02,858 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-19 15:41:02,858 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-19 15:41:02,863 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-19 15:41:02,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.09 03:41:01" (1/3) ... [2018-09-19 15:41:02,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@214511c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.09 03:41:02, skipping insertion in model container [2018-09-19 15:41:02,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.09 03:41:01" (2/3) ... [2018-09-19 15:41:02,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@214511c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.09 03:41:02, skipping insertion in model container [2018-09-19 15:41:02,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.09 03:41:02" (3/3) ... [2018-09-19 15:41:02,869 INFO L112 eAbstractionObserver]: Analyzing ICFG feedback_diverge_true-unreach-call_true-termination.c [2018-09-19 15:41:02,883 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-19 15:41:02,894 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-19 15:41:02,960 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-19 15:41:02,961 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-19 15:41:02,962 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-19 15:41:02,962 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-19 15:41:02,962 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-19 15:41:02,962 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-19 15:41:02,962 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-19 15:41:02,963 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-19 15:41:02,963 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-19 15:41:02,992 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2018-09-19 15:41:03,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-19 15:41:03,010 INFO L368 BasicCegarLoop]: Found error trace [2018-09-19 15:41:03,011 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-19 15:41:03,013 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-19 15:41:03,020 INFO L82 PathProgramCache]: Analyzing trace with hash -777563617, now seen corresponding path program 1 times [2018-09-19 15:41:03,026 INFO L227 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-09-19 15:41:03,027 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 15:41:03,044 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-19 15:41:03,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-19 15:41:03,120 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-19 15:41:03,166 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 15:41:03,166 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-09-19 15:41:03,186 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-19 15:41:03,186 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-19 15:41:03,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-09-19 15:41:03,206 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-09-19 15:41:03,207 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-09-19 15:41:03,209 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2018-09-19 15:41:03,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-19 15:41:03,235 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2018-09-19 15:41:03,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-09-19 15:41:03,237 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-09-19 15:41:03,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-19 15:41:03,246 INFO L225 Difference]: With dead ends: 37 [2018-09-19 15:41:03,247 INFO L226 Difference]: Without dead ends: 18 [2018-09-19 15:41:03,251 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 15:41:03,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-19 15:41:03,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-19 15:41:03,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-19 15:41:03,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-09-19 15:41:03,289 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 10 [2018-09-19 15:41:03,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-19 15:41:03,290 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-09-19 15:41:03,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-09-19 15:41:03,290 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-09-19 15:41:03,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-19 15:41:03,291 INFO L368 BasicCegarLoop]: Found error trace [2018-09-19 15:41:03,291 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-19 15:41:03,292 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-19 15:41:03,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1145892864, now seen corresponding path program 1 times [2018-09-19 15:41:03,292 INFO L227 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-09-19 15:41:03,292 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) [2018-09-19 15:41:03,303 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2018-09-19 15:41:03,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-19 15:41:03,327 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-19 15:41:03,354 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 15:41:03,354 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-09-19 15:41:03,363 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-19 15:41:03,364 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-19 15:41:03,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-19 15:41:03,366 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-19 15:41:03,366 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-19 15:41:03,366 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 3 states. [2018-09-19 15:41:03,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-19 15:41:03,430 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2018-09-19 15:41:03,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-19 15:41:03,431 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-09-19 15:41:03,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-19 15:41:03,433 INFO L225 Difference]: With dead ends: 29 [2018-09-19 15:41:03,433 INFO L226 Difference]: Without dead ends: 24 [2018-09-19 15:41:03,434 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 15:41:03,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-19 15:41:03,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2018-09-19 15:41:03,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-19 15:41:03,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-09-19 15:41:03,445 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 11 [2018-09-19 15:41:03,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-19 15:41:03,446 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-09-19 15:41:03,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-19 15:41:03,446 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-09-19 15:41:03,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-19 15:41:03,447 INFO L368 BasicCegarLoop]: Found error trace [2018-09-19 15:41:03,447 INFO L376 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-19 15:41:03,447 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-19 15:41:03,448 INFO L82 PathProgramCache]: Analyzing trace with hash 801798500, now seen corresponding path program 1 times [2018-09-19 15:41:03,448 INFO L227 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-09-19 15:41:03,448 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) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2018-09-19 15:41:03,454 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-19 15:41:03,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-19 15:41:03,617 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-19 15:41:03,677 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 15:41:03,677 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-19 15:41:03,749 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 15:41:03,767 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-19 15:41:03,767 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-09-19 15:41:03,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-19 15:41:03,768 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-19 15:41:03,768 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-09-19 15:41:03,772 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 6 states. [2018-09-19 15:41:04,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-19 15:41:04,042 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2018-09-19 15:41:04,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-19 15:41:04,045 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2018-09-19 15:41:04,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-19 15:41:04,046 INFO L225 Difference]: With dead ends: 43 [2018-09-19 15:41:04,046 INFO L226 Difference]: Without dead ends: 38 [2018-09-19 15:41:04,047 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-09-19 15:41:04,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-19 15:41:04,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-19 15:41:04,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-19 15:41:04,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2018-09-19 15:41:04,066 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 19 [2018-09-19 15:41:04,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-19 15:41:04,067 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2018-09-19 15:41:04,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-19 15:41:04,067 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2018-09-19 15:41:04,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-19 15:41:04,072 INFO L368 BasicCegarLoop]: Found error trace [2018-09-19 15:41:04,072 INFO L376 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-19 15:41:04,073 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-19 15:41:04,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1801372272, now seen corresponding path program 2 times [2018-09-19 15:41:04,075 INFO L227 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-09-19 15:41:04,075 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 15:41:04,085 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-09-19 15:41:04,629 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-19 15:41:04,630 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-19 15:41:04,690 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-19 15:41:04,819 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-09-19 15:41:04,819 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-19 15:41:05,425 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-09-19 15:41:05,448 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-19 15:41:05,448 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2018-09-19 15:41:05,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-19 15:41:05,449 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-19 15:41:05,450 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2018-09-19 15:41:05,450 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 12 states. [2018-09-19 15:41:06,090 WARN L178 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 7 [2018-09-19 15:41:06,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-19 15:41:06,361 INFO L93 Difference]: Finished difference Result 79 states and 103 transitions. [2018-09-19 15:41:06,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-19 15:41:06,363 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2018-09-19 15:41:06,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-19 15:41:06,365 INFO L225 Difference]: With dead ends: 79 [2018-09-19 15:41:06,366 INFO L226 Difference]: Without dead ends: 74 [2018-09-19 15:41:06,366 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2018-09-19 15:41:06,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-19 15:41:06,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-19 15:41:06,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-19 15:41:06,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 93 transitions. [2018-09-19 15:41:06,384 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 93 transitions. Word has length 43 [2018-09-19 15:41:06,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-19 15:41:06,384 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 93 transitions. [2018-09-19 15:41:06,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-19 15:41:06,385 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 93 transitions. [2018-09-19 15:41:06,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-09-19 15:41:06,388 INFO L368 BasicCegarLoop]: Found error trace [2018-09-19 15:41:06,389 INFO L376 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-19 15:41:06,389 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-19 15:41:06,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1897822696, now seen corresponding path program 3 times [2018-09-19 15:41:06,390 INFO L227 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-09-19 15:41:06,391 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 15:41:06,396 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2018-09-19 15:41:06,544 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-09-19 15:41:06,544 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-19 15:41:06,562 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-19 15:41:06,714 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2018-09-19 15:41:06,715 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-09-19 15:41:06,733 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-19 15:41:06,733 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-19 15:41:06,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-19 15:41:06,734 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-19 15:41:06,734 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-19 15:41:06,735 INFO L87 Difference]: Start difference. First operand 74 states and 93 transitions. Second operand 6 states. [2018-09-19 15:41:09,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-19 15:41:09,025 INFO L93 Difference]: Finished difference Result 156 states and 194 transitions. [2018-09-19 15:41:09,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-19 15:41:09,026 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 91 [2018-09-19 15:41:09,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-19 15:41:09,031 INFO L225 Difference]: With dead ends: 156 [2018-09-19 15:41:09,031 INFO L226 Difference]: Without dead ends: 151 [2018-09-19 15:41:09,032 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-09-19 15:41:09,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-19 15:41:09,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 74. [2018-09-19 15:41:09,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-19 15:41:09,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 93 transitions. [2018-09-19 15:41:09,053 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 93 transitions. Word has length 91 [2018-09-19 15:41:09,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-19 15:41:09,054 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 93 transitions. [2018-09-19 15:41:09,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-19 15:41:09,054 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 93 transitions. [2018-09-19 15:41:09,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-09-19 15:41:09,056 INFO L368 BasicCegarLoop]: Found error trace [2018-09-19 15:41:09,057 INFO L376 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-19 15:41:09,057 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-19 15:41:09,057 INFO L82 PathProgramCache]: Analyzing trace with hash -2138979162, now seen corresponding path program 1 times [2018-09-19 15:41:09,058 INFO L227 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-09-19 15:41:09,058 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 15:41:09,062 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-19 15:41:10,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-19 15:41:10,452 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-19 15:41:10,709 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2018-09-19 15:41:10,709 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-19 15:41:11,352 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2018-09-19 15:41:11,386 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-19 15:41:11,386 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2018-09-19 15:41:11,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-19 15:41:11,387 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-19 15:41:11,388 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2018-09-19 15:41:11,388 INFO L87 Difference]: Start difference. First operand 74 states and 93 transitions. Second operand 24 states. [2018-09-19 15:41:13,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-19 15:41:13,595 INFO L93 Difference]: Finished difference Result 216 states and 283 transitions. [2018-09-19 15:41:13,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-19 15:41:13,599 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 91 [2018-09-19 15:41:13,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-19 15:41:13,603 INFO L225 Difference]: With dead ends: 216 [2018-09-19 15:41:13,603 INFO L226 Difference]: Without dead ends: 211 [2018-09-19 15:41:13,605 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2018-09-19 15:41:13,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-09-19 15:41:13,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 146. [2018-09-19 15:41:13,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-09-19 15:41:13,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 189 transitions. [2018-09-19 15:41:13,641 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 189 transitions. Word has length 91 [2018-09-19 15:41:13,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-19 15:41:13,642 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 189 transitions. [2018-09-19 15:41:13,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-19 15:41:13,642 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 189 transitions. [2018-09-19 15:41:13,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2018-09-19 15:41:13,646 INFO L368 BasicCegarLoop]: Found error trace [2018-09-19 15:41:13,647 INFO L376 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-19 15:41:13,647 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-19 15:41:13,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1040911702, now seen corresponding path program 2 times [2018-09-19 15:41:13,648 INFO L227 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-09-19 15:41:13,648 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2018-09-19 15:41:13,655 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-09-19 15:41:16,320 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-19 15:41:16,320 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-19 15:41:16,632 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-19 15:41:17,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1430 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2018-09-19 15:41:17,649 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-19 15:41:19,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1430 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2018-09-19 15:41:19,834 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-19 15:41:19,835 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2018-09-19 15:41:19,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-19 15:41:19,836 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-19 15:41:19,837 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=1634, Unknown=0, NotChecked=0, Total=2256 [2018-09-19 15:41:19,838 INFO L87 Difference]: Start difference. First operand 146 states and 189 transitions. Second operand 48 states. [2018-09-19 15:41:22,465 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 7 [2018-09-19 15:41:22,993 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 7 [2018-09-19 15:41:23,562 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 7 [2018-09-19 15:41:33,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-19 15:41:33,608 INFO L93 Difference]: Finished difference Result 420 states and 559 transitions. [2018-09-19 15:41:33,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-19 15:41:33,609 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 187 [2018-09-19 15:41:33,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-19 15:41:33,614 INFO L225 Difference]: With dead ends: 420 [2018-09-19 15:41:33,614 INFO L226 Difference]: Without dead ends: 415 [2018-09-19 15:41:33,618 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=1678, Invalid=3152, Unknown=0, NotChecked=0, Total=4830 [2018-09-19 15:41:33,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2018-09-19 15:41:33,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 290. [2018-09-19 15:41:33,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2018-09-19 15:41:33,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 381 transitions. [2018-09-19 15:41:33,684 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 381 transitions. Word has length 187 [2018-09-19 15:41:33,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-19 15:41:33,685 INFO L480 AbstractCegarLoop]: Abstraction has 290 states and 381 transitions. [2018-09-19 15:41:33,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-19 15:41:33,686 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 381 transitions. [2018-09-19 15:41:33,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2018-09-19 15:41:33,695 INFO L368 BasicCegarLoop]: Found error trace [2018-09-19 15:41:33,696 INFO L376 BasicCegarLoop]: trace histogram [47, 46, 46, 46, 46, 46, 46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-19 15:41:33,696 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-19 15:41:33,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1977147062, now seen corresponding path program 3 times [2018-09-19 15:41:33,698 INFO L227 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-09-19 15:41:33,698 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2018-09-19 15:41:33,712 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown