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/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label39_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 21:04:28,984 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 21:04:28,986 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 21:04:29,002 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 21:04:29,003 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 21:04:29,004 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 21:04:29,005 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 21:04:29,007 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 21:04:29,009 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 21:04:29,010 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 21:04:29,011 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 21:04:29,011 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 21:04:29,012 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 21:04:29,013 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 21:04:29,014 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 21:04:29,015 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 21:04:29,016 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 21:04:29,018 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 21:04:29,020 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 21:04:29,022 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 21:04:29,023 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 21:04:29,024 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 21:04:29,027 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 21:04:29,027 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 21:04:29,027 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 21:04:29,028 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 21:04:29,029 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 21:04:29,030 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 21:04:29,031 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 21:04:29,032 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 21:04:29,032 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 21:04:29,033 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 21:04:29,033 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 21:04:29,034 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 21:04:29,035 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 21:04:29,035 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 21:04:29,036 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf [2018-11-07 21:04:29,051 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 21:04:29,052 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 21:04:29,053 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 21:04:29,053 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 21:04:29,053 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 21:04:29,053 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 21:04:29,053 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-07 21:04:29,054 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 21:04:29,054 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 21:04:29,054 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 21:04:29,054 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 21:04:29,054 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 21:04:29,055 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 21:04:29,055 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 21:04:29,056 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 21:04:29,056 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 21:04:29,056 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 21:04:29,056 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 21:04:29,056 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 21:04:29,057 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 21:04:29,057 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 21:04:29,057 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 21:04:29,057 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 21:04:29,058 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 21:04:29,058 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 21:04:29,058 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 21:04:29,058 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 21:04:29,058 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 21:04:29,059 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 21:04:29,059 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 21:04:29,059 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 21:04:29,059 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 21:04:29,059 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 21:04:29,060 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 21:04:29,060 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 21:04:29,120 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 21:04:29,137 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 21:04:29,141 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 21:04:29,143 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 21:04:29,144 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 21:04:29,144 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label39_true-unreach-call.c [2018-11-07 21:04:29,206 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19d0caef1/fa229f98e4f44e4887211bd3aed1709f/FLAG7990e9c8f [2018-11-07 21:04:29,905 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 21:04:29,906 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label39_true-unreach-call.c [2018-11-07 21:04:29,935 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19d0caef1/fa229f98e4f44e4887211bd3aed1709f/FLAG7990e9c8f [2018-11-07 21:04:29,958 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19d0caef1/fa229f98e4f44e4887211bd3aed1709f [2018-11-07 21:04:29,971 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 21:04:29,974 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 21:04:29,977 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 21:04:29,977 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 21:04:29,982 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 21:04:29,983 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 09:04:29" (1/1) ... [2018-11-07 21:04:29,987 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31523df3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:04:29, skipping insertion in model container [2018-11-07 21:04:29,987 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 09:04:29" (1/1) ... [2018-11-07 21:04:29,997 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 21:04:30,109 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 21:04:31,100 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 21:04:31,104 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 21:04:31,475 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 21:04:31,500 INFO L193 MainTranslator]: Completed translation [2018-11-07 21:04:31,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:04:31 WrapperNode [2018-11-07 21:04:31,501 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 21:04:31,502 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 21:04:31,502 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 21:04:31,503 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 21:04:31,514 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:04:31" (1/1) ... [2018-11-07 21:04:31,745 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:04:31" (1/1) ... [2018-11-07 21:04:31,754 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 21:04:31,754 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 21:04:31,754 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 21:04:31,755 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 21:04:31,765 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:04:31" (1/1) ... [2018-11-07 21:04:31,765 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:04:31" (1/1) ... [2018-11-07 21:04:31,779 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:04:31" (1/1) ... [2018-11-07 21:04:31,779 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:04:31" (1/1) ... [2018-11-07 21:04:31,862 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:04:31" (1/1) ... [2018-11-07 21:04:31,897 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:04:31" (1/1) ... [2018-11-07 21:04:31,928 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:04:31" (1/1) ... [2018-11-07 21:04:31,957 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 21:04:31,958 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 21:04:31,958 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 21:04:31,958 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 21:04:31,959 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:04:31" (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 [2018-11-07 21:04:32,031 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 21:04:32,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 21:04:32,031 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 21:04:32,031 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-11-07 21:04:32,032 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-11-07 21:04:32,032 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 21:04:32,032 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 21:04:32,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 21:04:32,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 21:04:32,032 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 21:04:32,033 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 21:04:41,833 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 21:04:41,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 09:04:41 BoogieIcfgContainer [2018-11-07 21:04:41,834 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 21:04:41,835 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 21:04:41,835 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 21:04:41,838 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 21:04:41,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 09:04:29" (1/3) ... [2018-11-07 21:04:41,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6365100a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 09:04:41, skipping insertion in model container [2018-11-07 21:04:41,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:04:31" (2/3) ... [2018-11-07 21:04:41,840 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6365100a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 09:04:41, skipping insertion in model container [2018-11-07 21:04:41,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 09:04:41" (3/3) ... [2018-11-07 21:04:41,842 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label39_true-unreach-call.c [2018-11-07 21:04:41,852 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 21:04:41,860 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 21:04:41,876 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 21:04:41,925 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 21:04:41,926 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 21:04:41,926 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 21:04:41,926 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 21:04:41,926 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 21:04:41,926 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 21:04:41,926 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 21:04:41,927 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 21:04:41,985 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states. [2018-11-07 21:04:41,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-11-07 21:04:41,995 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 21:04:41,996 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 21:04:41,999 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 21:04:42,004 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:04:42,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1351765020, now seen corresponding path program 1 times [2018-11-07 21:04:42,006 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 21:04:42,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:04:42,059 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:04:42,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:04:42,060 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 21:04:42,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:04:42,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 21:04:42,577 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 21:04:42,577 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 21:04:42,577 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 21:04:42,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 21:04:42,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 21:04:42,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 21:04:42,606 INFO L87 Difference]: Start difference. First operand 604 states. Second operand 4 states. [2018-11-07 21:04:51,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 21:04:51,443 INFO L93 Difference]: Finished difference Result 2125 states and 3954 transitions. [2018-11-07 21:04:51,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 21:04:51,445 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2018-11-07 21:04:51,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 21:04:51,473 INFO L225 Difference]: With dead ends: 2125 [2018-11-07 21:04:51,474 INFO L226 Difference]: Without dead ends: 1515 [2018-11-07 21:04:51,485 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 21:04:51,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2018-11-07 21:04:51,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 1043. [2018-11-07 21:04:51,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1043 states. [2018-11-07 21:04:51,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1043 states to 1043 states and 1647 transitions. [2018-11-07 21:04:51,617 INFO L78 Accepts]: Start accepts. Automaton has 1043 states and 1647 transitions. Word has length 70 [2018-11-07 21:04:51,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 21:04:51,618 INFO L480 AbstractCegarLoop]: Abstraction has 1043 states and 1647 transitions. [2018-11-07 21:04:51,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 21:04:51,619 INFO L276 IsEmpty]: Start isEmpty. Operand 1043 states and 1647 transitions. [2018-11-07 21:04:51,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-11-07 21:04:51,633 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 21:04:51,634 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 21:04:51,634 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 21:04:51,634 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:04:51,634 INFO L82 PathProgramCache]: Analyzing trace with hash -118036814, now seen corresponding path program 1 times [2018-11-07 21:04:51,635 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 21:04:51,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:04:51,636 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:04:51,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:04:51,636 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 21:04:51,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:04:51,921 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 21:04:51,922 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 21:04:51,922 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-07 21:04:51,922 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 21:04:51,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-07 21:04:51,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-07 21:04:51,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-07 21:04:51,925 INFO L87 Difference]: Start difference. First operand 1043 states and 1647 transitions. Second operand 5 states. [2018-11-07 21:04:59,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 21:04:59,263 INFO L93 Difference]: Finished difference Result 3017 states and 4847 transitions. [2018-11-07 21:04:59,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 21:04:59,263 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 142 [2018-11-07 21:04:59,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 21:04:59,277 INFO L225 Difference]: With dead ends: 3017 [2018-11-07 21:04:59,277 INFO L226 Difference]: Without dead ends: 1980 [2018-11-07 21:04:59,282 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-07 21:04:59,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1980 states. [2018-11-07 21:04:59,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1980 to 1954. [2018-11-07 21:04:59,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1954 states. [2018-11-07 21:04:59,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1954 states to 1954 states and 2892 transitions. [2018-11-07 21:04:59,378 INFO L78 Accepts]: Start accepts. Automaton has 1954 states and 2892 transitions. Word has length 142 [2018-11-07 21:04:59,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 21:04:59,379 INFO L480 AbstractCegarLoop]: Abstraction has 1954 states and 2892 transitions. [2018-11-07 21:04:59,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-07 21:04:59,379 INFO L276 IsEmpty]: Start isEmpty. Operand 1954 states and 2892 transitions. [2018-11-07 21:04:59,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-11-07 21:04:59,390 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 21:04:59,390 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 21:04:59,391 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 21:04:59,391 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:04:59,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1553613114, now seen corresponding path program 1 times [2018-11-07 21:04:59,391 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 21:04:59,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:04:59,395 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:04:59,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:04:59,396 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 21:04:59,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:05:00,011 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-11-07 21:05:00,313 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 21:05:00,314 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:05:00,314 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 21:05:00,315 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 146 with the following transitions: [2018-11-07 21:05:00,317 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1086], [1094], [1102], [1110], [1118], [1126], [1134], [1142], [1150], [1158], [1166], [1170], [1172], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1223], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-07 21:05:00,378 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 21:05:00,378 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 21:05:00,816 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 21:05:01,550 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 21:05:01,553 INFO L272 AbstractInterpreter]: Visited 83 different actions 235 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-11-07 21:05:01,606 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:05:01,610 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 21:05:01,610 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:05:01,610 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 21:05:01,628 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:05:01,628 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 21:05:01,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:05:01,740 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 21:05:05,477 WARN L179 SmtUtils]: Spent 3.25 s on a formula simplification that was a NOOP. DAG size: 42 [2018-11-07 21:05:05,894 WARN L179 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 21 [2018-11-07 21:05:06,112 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 4 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 21:05:06,113 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 21:05:07,005 WARN L179 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2018-11-07 21:05:07,348 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 21:05:07,383 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-07 21:05:07,383 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2018-11-07 21:05:07,384 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 21:05:07,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 21:05:07,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 21:05:07,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2018-11-07 21:05:07,385 INFO L87 Difference]: Start difference. First operand 1954 states and 2892 transitions. Second operand 6 states. [2018-11-07 21:07:42,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 21:07:42,917 INFO L93 Difference]: Finished difference Result 7503 states and 11519 transitions. [2018-11-07 21:07:42,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-07 21:07:42,919 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 145 [2018-11-07 21:07:42,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 21:07:42,958 INFO L225 Difference]: With dead ends: 7503 [2018-11-07 21:07:42,958 INFO L226 Difference]: Without dead ends: 5555 [2018-11-07 21:07:42,974 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 284 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2018-11-07 21:07:42,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5555 states. [2018-11-07 21:07:43,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5555 to 5549. [2018-11-07 21:07:43,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5549 states. [2018-11-07 21:07:43,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5549 states to 5549 states and 8234 transitions. [2018-11-07 21:07:43,152 INFO L78 Accepts]: Start accepts. Automaton has 5549 states and 8234 transitions. Word has length 145 [2018-11-07 21:07:43,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 21:07:43,153 INFO L480 AbstractCegarLoop]: Abstraction has 5549 states and 8234 transitions. [2018-11-07 21:07:43,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 21:07:43,153 INFO L276 IsEmpty]: Start isEmpty. Operand 5549 states and 8234 transitions. [2018-11-07 21:07:43,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-11-07 21:07:43,157 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 21:07:43,157 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 21:07:43,158 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 21:07:43,158 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:07:43,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1899074210, now seen corresponding path program 1 times [2018-11-07 21:07:43,158 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 21:07:43,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:07:43,159 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:07:43,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:07:43,160 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 21:07:43,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:07:43,365 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 21:07:43,366 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 21:07:43,366 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 21:07:43,366 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 21:07:43,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 21:07:43,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 21:07:43,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 21:07:43,368 INFO L87 Difference]: Start difference. First operand 5549 states and 8234 transitions. Second operand 6 states. [2018-11-07 21:07:47,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 21:07:47,515 INFO L93 Difference]: Finished difference Result 13412 states and 20264 transitions. [2018-11-07 21:07:47,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 21:07:47,516 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 150 [2018-11-07 21:07:47,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 21:07:47,560 INFO L225 Difference]: With dead ends: 13412 [2018-11-07 21:07:47,560 INFO L226 Difference]: Without dead ends: 7869 [2018-11-07 21:07:47,586 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 21:07:47,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7869 states. [2018-11-07 21:07:47,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7869 to 7799. [2018-11-07 21:07:47,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7799 states. [2018-11-07 21:07:47,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7799 states to 7799 states and 10182 transitions. [2018-11-07 21:07:47,811 INFO L78 Accepts]: Start accepts. Automaton has 7799 states and 10182 transitions. Word has length 150 [2018-11-07 21:07:47,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 21:07:47,812 INFO L480 AbstractCegarLoop]: Abstraction has 7799 states and 10182 transitions. [2018-11-07 21:07:47,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 21:07:47,812 INFO L276 IsEmpty]: Start isEmpty. Operand 7799 states and 10182 transitions. [2018-11-07 21:07:47,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-11-07 21:07:47,816 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 21:07:47,816 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 21:07:47,816 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 21:07:47,817 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:07:47,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1230054638, now seen corresponding path program 1 times [2018-11-07 21:07:47,817 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 21:07:47,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:07:47,818 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:07:47,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:07:47,818 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 21:07:47,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:07:48,095 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 21:07:48,789 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 57 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 21:07:48,789 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:07:48,790 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 21:07:48,790 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 159 with the following transitions: [2018-11-07 21:07:48,791 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1086], [1094], [1102], [1110], [1118], [1126], [1134], [1142], [1150], [1158], [1166], [1170], [1172], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-07 21:07:48,797 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 21:07:48,797 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 21:07:48,925 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 21:07:49,578 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 21:07:49,578 INFO L272 AbstractInterpreter]: Visited 96 different actions 274 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-11-07 21:07:49,617 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:07:49,617 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 21:07:49,618 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:07:49,618 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 21:07:49,629 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:07:49,630 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 21:07:49,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:07:49,707 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 21:07:49,891 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 21:07:49,891 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 21:07:50,105 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 21:07:50,125 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-07 21:07:50,126 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2018-11-07 21:07:50,126 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 21:07:50,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 21:07:50,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 21:07:50,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-07 21:07:50,127 INFO L87 Difference]: Start difference. First operand 7799 states and 10182 transitions. Second operand 3 states. [2018-11-07 21:07:52,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 21:07:52,820 INFO L93 Difference]: Finished difference Result 15592 states and 20390 transitions. [2018-11-07 21:07:52,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 21:07:52,823 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 158 [2018-11-07 21:07:52,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 21:07:52,855 INFO L225 Difference]: With dead ends: 15592 [2018-11-07 21:07:52,855 INFO L226 Difference]: Without dead ends: 7799 [2018-11-07 21:07:52,892 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 315 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-07 21:07:52,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7799 states. [2018-11-07 21:07:53,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7799 to 7799. [2018-11-07 21:07:53,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7799 states. [2018-11-07 21:07:53,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7799 states to 7799 states and 9658 transitions. [2018-11-07 21:07:53,095 INFO L78 Accepts]: Start accepts. Automaton has 7799 states and 9658 transitions. Word has length 158 [2018-11-07 21:07:53,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 21:07:53,095 INFO L480 AbstractCegarLoop]: Abstraction has 7799 states and 9658 transitions. [2018-11-07 21:07:53,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 21:07:53,097 INFO L276 IsEmpty]: Start isEmpty. Operand 7799 states and 9658 transitions. [2018-11-07 21:07:53,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2018-11-07 21:07:53,110 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 21:07:53,111 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 21:07:53,111 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 21:07:53,111 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:07:53,111 INFO L82 PathProgramCache]: Analyzing trace with hash -2112454952, now seen corresponding path program 1 times [2018-11-07 21:07:53,112 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 21:07:53,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:07:53,113 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:07:53,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:07:53,113 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 21:07:53,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:07:53,568 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 129 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-11-07 21:07:53,568 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 21:07:53,570 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 21:07:53,570 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 21:07:53,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 21:07:53,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 21:07:53,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 21:07:53,571 INFO L87 Difference]: Start difference. First operand 7799 states and 9658 transitions. Second operand 3 states. [2018-11-07 21:07:57,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 21:07:57,219 INFO L93 Difference]: Finished difference Result 19992 states and 25260 transitions. [2018-11-07 21:07:57,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 21:07:57,222 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 234 [2018-11-07 21:07:57,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 21:07:57,274 INFO L225 Difference]: With dead ends: 19992 [2018-11-07 21:07:57,275 INFO L226 Difference]: Without dead ends: 12199 [2018-11-07 21:07:57,296 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 21:07:57,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12199 states. [2018-11-07 21:07:57,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12199 to 12199. [2018-11-07 21:07:57,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12199 states. [2018-11-07 21:07:57,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12199 states to 12199 states and 14575 transitions. [2018-11-07 21:07:57,540 INFO L78 Accepts]: Start accepts. Automaton has 12199 states and 14575 transitions. Word has length 234 [2018-11-07 21:07:57,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 21:07:57,541 INFO L480 AbstractCegarLoop]: Abstraction has 12199 states and 14575 transitions. [2018-11-07 21:07:57,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 21:07:57,541 INFO L276 IsEmpty]: Start isEmpty. Operand 12199 states and 14575 transitions. [2018-11-07 21:07:57,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2018-11-07 21:07:57,549 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 21:07:57,549 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 21:07:57,549 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 21:07:57,550 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:07:57,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1918173257, now seen corresponding path program 1 times [2018-11-07 21:07:57,550 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 21:07:57,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:07:57,551 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:07:57,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:07:57,551 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 21:07:57,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:07:57,919 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 131 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-11-07 21:07:57,919 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:07:57,919 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 21:07:57,919 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 248 with the following transitions: [2018-11-07 21:07:57,920 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1086], [1094], [1102], [1110], [1118], [1126], [1134], [1142], [1150], [1158], [1166], [1170], [1172], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [1283], [1286], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-07 21:07:57,925 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 21:07:57,925 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 21:07:58,021 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 21:07:58,764 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 21:07:58,765 INFO L272 AbstractInterpreter]: Visited 98 different actions 382 times. Merged at 7 different actions 24 times. Never widened. Found 4 fixpoints after 2 different actions. Largest state had 26 variables. [2018-11-07 21:07:58,800 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:07:58,801 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 21:07:58,801 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:07:58,801 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 21:07:58,813 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:07:58,813 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 21:07:58,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:07:58,903 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 21:07:59,315 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 17 [2018-11-07 21:07:59,881 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 131 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-11-07 21:07:59,881 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 21:08:00,949 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 131 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 21:08:00,969 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 21:08:00,969 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 16 [2018-11-07 21:08:00,969 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 21:08:00,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 21:08:00,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 21:08:00,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2018-11-07 21:08:00,971 INFO L87 Difference]: Start difference. First operand 12199 states and 14575 transitions. Second operand 10 states. [2018-11-07 21:08:18,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 21:08:18,927 INFO L93 Difference]: Finished difference Result 48999 states and 61462 transitions. [2018-11-07 21:08:18,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-07 21:08:18,927 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 247 [2018-11-07 21:08:18,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 21:08:19,066 INFO L225 Difference]: With dead ends: 48999 [2018-11-07 21:08:19,067 INFO L226 Difference]: Without dead ends: 36806 [2018-11-07 21:08:19,113 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 487 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=172, Invalid=428, Unknown=0, NotChecked=0, Total=600 [2018-11-07 21:08:19,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36806 states. [2018-11-07 21:08:19,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36806 to 33129. [2018-11-07 21:08:19,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33129 states. [2018-11-07 21:08:19,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33129 states to 33129 states and 40052 transitions. [2018-11-07 21:08:19,850 INFO L78 Accepts]: Start accepts. Automaton has 33129 states and 40052 transitions. Word has length 247 [2018-11-07 21:08:19,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 21:08:19,850 INFO L480 AbstractCegarLoop]: Abstraction has 33129 states and 40052 transitions. [2018-11-07 21:08:19,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 21:08:19,851 INFO L276 IsEmpty]: Start isEmpty. Operand 33129 states and 40052 transitions. [2018-11-07 21:08:19,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2018-11-07 21:08:19,868 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 21:08:19,869 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 21:08:19,869 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 21:08:19,869 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:08:19,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1553390502, now seen corresponding path program 1 times [2018-11-07 21:08:19,870 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 21:08:19,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:08:19,870 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:08:19,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:08:19,871 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 21:08:19,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:08:20,750 WARN L179 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2018-11-07 21:08:21,000 WARN L179 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 7 [2018-11-07 21:08:21,301 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 191 proven. 19 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2018-11-07 21:08:21,302 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:08:21,302 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 21:08:21,302 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 345 with the following transitions: [2018-11-07 21:08:21,302 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1086], [1094], [1102], [1110], [1118], [1126], [1134], [1142], [1150], [1158], [1166], [1170], [1172], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1223], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1283], [1286], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1384], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-07 21:08:21,307 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 21:08:21,307 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 21:08:21,369 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 21:08:22,101 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 21:08:22,101 INFO L272 AbstractInterpreter]: Visited 120 different actions 346 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-11-07 21:08:22,134 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:08:22,135 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 21:08:22,135 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:08:22,135 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 21:08:22,148 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:08:22,148 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 21:08:22,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:08:22,249 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 21:08:22,571 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 362 proven. 2 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2018-11-07 21:08:22,572 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 21:08:22,805 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2018-11-07 21:08:23,208 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 267 proven. 88 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-11-07 21:08:23,241 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 21:08:23,242 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 13 [2018-11-07 21:08:23,242 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 21:08:23,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-07 21:08:23,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-07 21:08:23,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2018-11-07 21:08:23,245 INFO L87 Difference]: Start difference. First operand 33129 states and 40052 transitions. Second operand 12 states. Received shutdown request... [2018-11-07 21:08:40,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-11-07 21:08:40,328 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 21:08:40,334 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 21:08:40,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 09:08:40 BoogieIcfgContainer [2018-11-07 21:08:40,334 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 21:08:40,335 INFO L168 Benchmark]: Toolchain (without parser) took 250363.10 ms. Allocated memory was 1.5 GB in the beginning and 3.1 GB in the end (delta: 1.6 GB). Free memory was 1.4 GB in the beginning and 1.8 GB in the end (delta: -379.7 MB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. [2018-11-07 21:08:40,336 INFO L168 Benchmark]: CDTParser took 0.23 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. [2018-11-07 21:08:40,337 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1524.54 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 137.4 MB). Peak memory consumption was 137.4 MB. Max. memory is 7.1 GB. [2018-11-07 21:08:40,338 INFO L168 Benchmark]: Boogie Procedure Inliner took 251.86 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 764.4 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -946.6 MB). Peak memory consumption was 42.4 MB. Max. memory is 7.1 GB. [2018-11-07 21:08:40,339 INFO L168 Benchmark]: Boogie Preprocessor took 203.38 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2018-11-07 21:08:40,340 INFO L168 Benchmark]: RCFGBuilder took 9875.87 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 447.9 MB). Peak memory consumption was 447.9 MB. Max. memory is 7.1 GB. [2018-11-07 21:08:40,341 INFO L168 Benchmark]: TraceAbstraction took 238499.38 ms. Allocated memory was 2.3 GB in the beginning and 3.1 GB in the end (delta: 812.6 MB). Free memory was 1.7 GB in the beginning and 1.8 GB in the end (delta: -32.4 MB). Peak memory consumption was 780.2 MB. Max. memory is 7.1 GB. [2018-11-07 21:08:40,345 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 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. * CACSL2BoogieTranslator took 1524.54 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 137.4 MB). Peak memory consumption was 137.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 251.86 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 764.4 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -946.6 MB). Peak memory consumption was 42.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 203.38 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 9875.87 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 447.9 MB). Peak memory consumption was 447.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 238499.38 ms. Allocated memory was 2.3 GB in the beginning and 3.1 GB in the end (delta: 812.6 MB). Free memory was 1.7 GB in the beginning and 1.8 GB in the end (delta: -32.4 MB). Peak memory consumption was 780.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 197]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 197). Cancelled while BasicCegarLoop was constructing difference of abstraction (33129states) and FLOYD_HOARE automaton (currently 46 states, 12 states before enhancement),while ReachableStatesComputation was computing reachable states (41666 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 604 locations, 1 error locations. TIMEOUT Result, 238.4s OverallTime, 8 OverallIterations, 4 TraceHistogramMax, 217.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2922 SDtfs, 21360 SDslu, 3269 SDs, 0 SdLazy, 38386 SolverSat, 7229 SolverUnsat, 211 SolverUnknown, 0 SolverNotchecked, 204.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1916 GetRequests, 1796 SyntacticMatches, 11 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 914 ImplicationChecksByTransitivity, 10.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33129occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 3.8s AbstIntTime, 4 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 1.7s AutomataMinimizationTime, 7 MinimizatonAttempts, 4251 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 13.4s InterpolantComputationTime, 2384 NumberOfCodeBlocks, 2384 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 3262 ConstructedInterpolants, 237 QuantifiedInterpolants, 3496221 SizeOfPredicates, 10 NumberOfNonLiveVariables, 1624 ConjunctsInSsa, 27 ConjunctsInUnsatCore, 16 InterpolantComputations, 7 PerfectInterpolantSequences, 2308/2632 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown