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/Problem03_label14_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-63daa26 [2018-11-12 17:17:54,997 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-12 17:17:54,999 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-12 17:17:55,011 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-12 17:17:55,012 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-12 17:17:55,013 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-12 17:17:55,014 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-12 17:17:55,016 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-12 17:17:55,018 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-12 17:17:55,019 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-12 17:17:55,019 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-12 17:17:55,020 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-12 17:17:55,021 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-12 17:17:55,022 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-12 17:17:55,026 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-12 17:17:55,027 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-12 17:17:55,028 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-12 17:17:55,031 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-12 17:17:55,041 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-12 17:17:55,045 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-12 17:17:55,048 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-12 17:17:55,049 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-12 17:17:55,051 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-12 17:17:55,051 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-12 17:17:55,052 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-12 17:17:55,055 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-12 17:17:55,056 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-12 17:17:55,056 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-12 17:17:55,057 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-12 17:17:55,062 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-12 17:17:55,062 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-12 17:17:55,064 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-11-12 17:17:55,067 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 [2018-11-12 17:17:55,095 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-12 17:17:55,096 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-12 17:17:55,097 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-12 17:17:55,097 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-12 17:17:55,098 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-12 17:17:55,098 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-12 17:17:55,098 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-12 17:17:55,098 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-12 17:17:55,098 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-12 17:17:55,102 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-12 17:17:55,102 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-12 17:17:55,102 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-12 17:17:55,102 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-12 17:17:55,103 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-12 17:17:55,104 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-12 17:17:55,104 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-12 17:17:55,104 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-12 17:17:55,104 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-12 17:17:55,104 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-12 17:17:55,104 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-12 17:17:55,106 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-12 17:17:55,107 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-12 17:17:55,107 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-12 17:17:55,107 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-12 17:17:55,107 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-12 17:17:55,107 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-12 17:17:55,108 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-12 17:17:55,108 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-12 17:17:55,108 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-12 17:17:55,108 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-12 17:17:55,108 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-12 17:17:55,109 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-12 17:17:55,109 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-12 17:17:55,109 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-12 17:17:55,109 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-12 17:17:55,156 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-12 17:17:55,178 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-12 17:17:55,182 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-12 17:17:55,184 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-12 17:17:55,184 INFO L276 PluginConnector]: CDTParser initialized [2018-11-12 17:17:55,185 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label14_true-unreach-call.c [2018-11-12 17:17:55,241 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9467396e9/b468c1f67d364277bb8fedd69e24f8ad/FLAG4a725f539 [2018-11-12 17:17:55,840 INFO L298 CDTParser]: Found 1 translation units. [2018-11-12 17:17:55,841 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label14_true-unreach-call.c [2018-11-12 17:17:55,866 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9467396e9/b468c1f67d364277bb8fedd69e24f8ad/FLAG4a725f539 [2018-11-12 17:17:55,885 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9467396e9/b468c1f67d364277bb8fedd69e24f8ad [2018-11-12 17:17:55,899 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-12 17:17:55,901 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-12 17:17:55,902 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-12 17:17:55,902 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-12 17:17:55,906 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-12 17:17:55,907 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 05:17:55" (1/1) ... [2018-11-12 17:17:55,911 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e0cee61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:17:55, skipping insertion in model container [2018-11-12 17:17:55,911 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 05:17:55" (1/1) ... [2018-11-12 17:17:55,922 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-12 17:17:56,012 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-12 17:17:56,775 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 17:17:56,780 INFO L189 MainTranslator]: Completed pre-run [2018-11-12 17:17:57,059 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 17:17:57,085 INFO L193 MainTranslator]: Completed translation [2018-11-12 17:17:57,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:17:57 WrapperNode [2018-11-12 17:17:57,086 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-12 17:17:57,087 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-12 17:17:57,088 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-12 17:17:57,088 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-12 17:17:57,099 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:17:57" (1/1) ... [2018-11-12 17:17:57,281 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:17:57" (1/1) ... [2018-11-12 17:17:57,290 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-12 17:17:57,290 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-12 17:17:57,290 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-12 17:17:57,290 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-12 17:17:57,305 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:17:57" (1/1) ... [2018-11-12 17:17:57,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:17:57" (1/1) ... [2018-11-12 17:17:57,315 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:17:57" (1/1) ... [2018-11-12 17:17:57,315 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:17:57" (1/1) ... [2018-11-12 17:17:57,370 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:17:57" (1/1) ... [2018-11-12 17:17:57,400 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:17:57" (1/1) ... [2018-11-12 17:17:57,412 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:17:57" (1/1) ... [2018-11-12 17:17:57,428 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-12 17:17:57,429 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-12 17:17:57,429 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-12 17:17:57,429 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-12 17:17:57,430 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:17:57" (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 [2018-11-12 17:17:57,500 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-12 17:17:57,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-12 17:17:57,500 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-12 17:17:57,501 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-12 17:17:57,501 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-12 17:17:57,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-12 17:17:57,501 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-12 17:17:57,501 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-12 17:17:57,501 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-12 17:18:02,802 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-12 17:18:02,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 05:18:02 BoogieIcfgContainer [2018-11-12 17:18:02,803 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-12 17:18:02,805 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-12 17:18:02,805 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-12 17:18:02,808 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-12 17:18:02,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 05:17:55" (1/3) ... [2018-11-12 17:18:02,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c629765 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 05:18:02, skipping insertion in model container [2018-11-12 17:18:02,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:17:57" (2/3) ... [2018-11-12 17:18:02,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c629765 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 05:18:02, skipping insertion in model container [2018-11-12 17:18:02,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 05:18:02" (3/3) ... [2018-11-12 17:18:02,813 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label14_true-unreach-call.c [2018-11-12 17:18:02,824 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-12 17:18:02,835 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-12 17:18:02,853 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-12 17:18:02,896 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-12 17:18:02,896 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-12 17:18:02,896 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-12 17:18:02,896 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-12 17:18:02,897 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-12 17:18:02,897 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-12 17:18:02,897 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-12 17:18:02,897 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-12 17:18:02,927 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-11-12 17:18:02,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-11-12 17:18:02,946 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 17:18:02,948 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, 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, 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] [2018-11-12 17:18:02,951 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 17:18:02,957 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:18:02,958 INFO L82 PathProgramCache]: Analyzing trace with hash -594515452, now seen corresponding path program 1 times [2018-11-12 17:18:02,961 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 17:18:03,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:18:03,016 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:18:03,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:18:03,016 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 17:18:03,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:18:03,888 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-11-12 17:18:04,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 17:18:04,288 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 17:18:04,289 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-12 17:18:04,289 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 17:18:04,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-12 17:18:04,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-12 17:18:04,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 17:18:04,317 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 4 states. [2018-11-12 17:18:07,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 17:18:07,249 INFO L93 Difference]: Finished difference Result 1054 states and 1900 transitions. [2018-11-12 17:18:07,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-12 17:18:07,253 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 177 [2018-11-12 17:18:07,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 17:18:07,278 INFO L225 Difference]: With dead ends: 1054 [2018-11-12 17:18:07,278 INFO L226 Difference]: Without dead ends: 736 [2018-11-12 17:18:07,286 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 17:18:07,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2018-11-12 17:18:07,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 526. [2018-11-12 17:18:07,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 526 states. [2018-11-12 17:18:07,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 886 transitions. [2018-11-12 17:18:07,376 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 886 transitions. Word has length 177 [2018-11-12 17:18:07,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 17:18:07,378 INFO L480 AbstractCegarLoop]: Abstraction has 526 states and 886 transitions. [2018-11-12 17:18:07,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-12 17:18:07,378 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 886 transitions. [2018-11-12 17:18:07,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2018-11-12 17:18:07,385 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 17:18:07,386 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 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, 1] [2018-11-12 17:18:07,386 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 17:18:07,386 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:18:07,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1749816701, now seen corresponding path program 1 times [2018-11-12 17:18:07,387 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 17:18:07,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:18:07,388 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:18:07,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:18:07,389 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 17:18:07,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:18:07,668 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-11-12 17:18:08,062 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 17:18:08,062 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 17:18:08,062 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-12 17:18:08,063 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 17:18:08,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-12 17:18:08,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-12 17:18:08,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-12 17:18:08,066 INFO L87 Difference]: Start difference. First operand 526 states and 886 transitions. Second operand 6 states. [2018-11-12 17:18:11,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 17:18:11,296 INFO L93 Difference]: Finished difference Result 1588 states and 2744 transitions. [2018-11-12 17:18:11,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-12 17:18:11,299 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 187 [2018-11-12 17:18:11,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 17:18:11,310 INFO L225 Difference]: With dead ends: 1588 [2018-11-12 17:18:11,310 INFO L226 Difference]: Without dead ends: 1068 [2018-11-12 17:18:11,313 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-12 17:18:11,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2018-11-12 17:18:11,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 1025. [2018-11-12 17:18:11,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1025 states. [2018-11-12 17:18:11,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 1721 transitions. [2018-11-12 17:18:11,389 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 1721 transitions. Word has length 187 [2018-11-12 17:18:11,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 17:18:11,389 INFO L480 AbstractCegarLoop]: Abstraction has 1025 states and 1721 transitions. [2018-11-12 17:18:11,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-12 17:18:11,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 1721 transitions. [2018-11-12 17:18:11,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-11-12 17:18:11,395 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 17:18:11,395 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 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] [2018-11-12 17:18:11,396 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 17:18:11,396 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:18:11,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1491408640, now seen corresponding path program 1 times [2018-11-12 17:18:11,396 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 17:18:11,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:18:11,398 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:18:11,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:18:11,398 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 17:18:11,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:18:11,723 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 17:18:11,723 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 17:18:11,723 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-12 17:18:11,723 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 17:18:11,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-12 17:18:11,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-12 17:18:11,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-12 17:18:11,725 INFO L87 Difference]: Start difference. First operand 1025 states and 1721 transitions. Second operand 3 states. [2018-11-12 17:18:14,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 17:18:14,112 INFO L93 Difference]: Finished difference Result 2894 states and 5042 transitions. [2018-11-12 17:18:14,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-12 17:18:14,113 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 190 [2018-11-12 17:18:14,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 17:18:14,133 INFO L225 Difference]: With dead ends: 2894 [2018-11-12 17:18:14,133 INFO L226 Difference]: Without dead ends: 1875 [2018-11-12 17:18:14,139 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-12 17:18:14,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2018-11-12 17:18:14,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1873. [2018-11-12 17:18:14,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1873 states. [2018-11-12 17:18:14,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 3048 transitions. [2018-11-12 17:18:14,208 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 3048 transitions. Word has length 190 [2018-11-12 17:18:14,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 17:18:14,209 INFO L480 AbstractCegarLoop]: Abstraction has 1873 states and 3048 transitions. [2018-11-12 17:18:14,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-12 17:18:14,209 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 3048 transitions. [2018-11-12 17:18:14,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-11-12 17:18:14,217 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 17:18:14,217 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 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] [2018-11-12 17:18:14,217 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 17:18:14,218 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:18:14,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1722677517, now seen corresponding path program 1 times [2018-11-12 17:18:14,218 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 17:18:14,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:18:14,219 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:18:14,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:18:14,219 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 17:18:14,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:18:14,502 WARN L179 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-11-12 17:18:14,602 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 17:18:14,602 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 17:18:14,603 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-12 17:18:14,603 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 17:18:14,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-12 17:18:14,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-12 17:18:14,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-12 17:18:14,605 INFO L87 Difference]: Start difference. First operand 1873 states and 3048 transitions. Second operand 6 states. [2018-11-12 17:18:17,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 17:18:17,737 INFO L93 Difference]: Finished difference Result 5735 states and 10142 transitions. [2018-11-12 17:18:17,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-12 17:18:17,737 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 195 [2018-11-12 17:18:17,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 17:18:17,768 INFO L225 Difference]: With dead ends: 5735 [2018-11-12 17:18:17,768 INFO L226 Difference]: Without dead ends: 3868 [2018-11-12 17:18:17,777 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-12 17:18:17,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3868 states. [2018-11-12 17:18:17,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3868 to 3768. [2018-11-12 17:18:17,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3768 states. [2018-11-12 17:18:17,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3768 states to 3768 states and 6275 transitions. [2018-11-12 17:18:17,913 INFO L78 Accepts]: Start accepts. Automaton has 3768 states and 6275 transitions. Word has length 195 [2018-11-12 17:18:17,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 17:18:17,914 INFO L480 AbstractCegarLoop]: Abstraction has 3768 states and 6275 transitions. [2018-11-12 17:18:17,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-12 17:18:17,914 INFO L276 IsEmpty]: Start isEmpty. Operand 3768 states and 6275 transitions. [2018-11-12 17:18:17,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-11-12 17:18:17,928 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 17:18:17,928 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 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] [2018-11-12 17:18:17,928 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 17:18:17,929 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:18:17,929 INFO L82 PathProgramCache]: Analyzing trace with hash -340490772, now seen corresponding path program 1 times [2018-11-12 17:18:17,929 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 17:18:17,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:18:17,930 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:18:17,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:18:17,930 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 17:18:17,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:18:18,165 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 17:18:18,165 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 17:18:18,166 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-11-12 17:18:18,166 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 17:18:18,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-12 17:18:18,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-12 17:18:18,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-12 17:18:18,167 INFO L87 Difference]: Start difference. First operand 3768 states and 6275 transitions. Second operand 7 states. [2018-11-12 17:18:20,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 17:18:20,064 INFO L93 Difference]: Finished difference Result 11468 states and 21130 transitions. [2018-11-12 17:18:20,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-12 17:18:20,065 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 196 [2018-11-12 17:18:20,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 17:18:20,120 INFO L225 Difference]: With dead ends: 11468 [2018-11-12 17:18:20,120 INFO L226 Difference]: Without dead ends: 7706 [2018-11-12 17:18:20,139 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2018-11-12 17:18:20,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7706 states. [2018-11-12 17:18:20,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7706 to 7509. [2018-11-12 17:18:20,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7509 states. [2018-11-12 17:18:20,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7509 states to 7509 states and 12934 transitions. [2018-11-12 17:18:20,419 INFO L78 Accepts]: Start accepts. Automaton has 7509 states and 12934 transitions. Word has length 196 [2018-11-12 17:18:20,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 17:18:20,419 INFO L480 AbstractCegarLoop]: Abstraction has 7509 states and 12934 transitions. [2018-11-12 17:18:20,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-12 17:18:20,419 INFO L276 IsEmpty]: Start isEmpty. Operand 7509 states and 12934 transitions. [2018-11-12 17:18:20,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2018-11-12 17:18:20,447 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 17:18:20,447 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 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, 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] [2018-11-12 17:18:20,447 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 17:18:20,448 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:18:20,448 INFO L82 PathProgramCache]: Analyzing trace with hash 677632951, now seen corresponding path program 1 times [2018-11-12 17:18:20,448 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 17:18:20,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:18:20,449 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:18:20,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:18:20,449 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 17:18:20,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:18:20,707 WARN L179 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-12 17:18:20,901 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 17:18:20,902 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 17:18:20,902 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 17:18:20,903 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 202 with the following transitions: [2018-11-12 17:18:20,911 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [10], [12], [13], [17], [21], [25], [28], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [877], [879], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-12 17:18:20,988 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 17:18:20,988 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 17:18:22,818 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 17:18:22,820 INFO L272 AbstractInterpreter]: Visited 178 different actions 178 times. Never merged. Never widened. Performed 3193 root evaluator evaluations with a maximum evaluation depth of 6. Performed 3193 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Never found a fixpoint. Largest state had 88 variables. [2018-11-12 17:18:22,858 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:18:22,859 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 17:18:24,190 INFO L227 lantSequenceWeakener]: Weakened 190 states. On average, predicates are now at 72.54% of their original sizes. [2018-11-12 17:18:24,191 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 17:18:25,824 INFO L415 sIntCurrentIteration]: We unified 200 AI predicates to 200 [2018-11-12 17:18:25,824 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 17:18:25,825 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 17:18:25,826 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [21] imperfect sequences [5] total 24 [2018-11-12 17:18:25,826 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 17:18:25,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-12 17:18:25,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-12 17:18:25,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2018-11-12 17:18:25,827 INFO L87 Difference]: Start difference. First operand 7509 states and 12934 transitions. Second operand 21 states. [2018-11-12 17:19:18,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 17:19:18,470 INFO L93 Difference]: Finished difference Result 15222 states and 26235 transitions. [2018-11-12 17:19:18,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-12 17:19:18,470 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 201 [2018-11-12 17:19:18,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 17:19:18,511 INFO L225 Difference]: With dead ends: 15222 [2018-11-12 17:19:18,511 INFO L226 Difference]: Without dead ends: 7719 [2018-11-12 17:19:18,533 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 203 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2018-11-12 17:19:18,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7719 states. [2018-11-12 17:19:18,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7719 to 7717. [2018-11-12 17:19:18,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7717 states. [2018-11-12 17:19:18,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7717 states to 7717 states and 13152 transitions. [2018-11-12 17:19:18,747 INFO L78 Accepts]: Start accepts. Automaton has 7717 states and 13152 transitions. Word has length 201 [2018-11-12 17:19:18,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 17:19:18,747 INFO L480 AbstractCegarLoop]: Abstraction has 7717 states and 13152 transitions. [2018-11-12 17:19:18,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-12 17:19:18,748 INFO L276 IsEmpty]: Start isEmpty. Operand 7717 states and 13152 transitions. [2018-11-12 17:19:18,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-11-12 17:19:18,774 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 17:19:18,775 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 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, 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] [2018-11-12 17:19:18,775 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 17:19:18,775 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:19:18,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1749925182, now seen corresponding path program 1 times [2018-11-12 17:19:18,776 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 17:19:18,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:19:18,777 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:19:18,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:19:18,777 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 17:19:18,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:19:19,084 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 17:19:19,084 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 17:19:19,085 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 17:19:19,085 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 211 with the following transitions: [2018-11-12 17:19:19,086 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [10], [12], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [877], [879], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-12 17:19:19,099 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 17:19:19,099 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 17:19:21,430 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 17:19:21,430 INFO L272 AbstractInterpreter]: Visited 181 different actions 355 times. Merged at 4 different actions 4 times. Never widened. Performed 8086 root evaluator evaluations with a maximum evaluation depth of 6. Performed 8086 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-12 17:19:21,437 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:19:21,437 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 17:19:22,726 INFO L227 lantSequenceWeakener]: Weakened 205 states. On average, predicates are now at 72.39% of their original sizes. [2018-11-12 17:19:22,727 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 17:19:23,315 INFO L415 sIntCurrentIteration]: We unified 209 AI predicates to 209 [2018-11-12 17:19:23,315 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 17:19:23,316 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 17:19:23,316 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [23] imperfect sequences [5] total 26 [2018-11-12 17:19:23,316 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 17:19:23,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-12 17:19:23,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-12 17:19:23,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2018-11-12 17:19:23,317 INFO L87 Difference]: Start difference. First operand 7717 states and 13152 transitions. Second operand 23 states. [2018-11-12 17:20:33,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 17:20:33,940 INFO L93 Difference]: Finished difference Result 21299 states and 37287 transitions. [2018-11-12 17:20:33,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-12 17:20:33,940 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 210 [2018-11-12 17:20:33,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 17:20:34,009 INFO L225 Difference]: With dead ends: 21299 [2018-11-12 17:20:34,010 INFO L226 Difference]: Without dead ends: 13796 [2018-11-12 17:20:34,058 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 218 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2018-11-12 17:20:34,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13796 states. [2018-11-12 17:20:34,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13796 to 13785. [2018-11-12 17:20:34,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13785 states. [2018-11-12 17:20:34,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13785 states to 13785 states and 20633 transitions. [2018-11-12 17:20:34,505 INFO L78 Accepts]: Start accepts. Automaton has 13785 states and 20633 transitions. Word has length 210 [2018-11-12 17:20:34,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 17:20:34,505 INFO L480 AbstractCegarLoop]: Abstraction has 13785 states and 20633 transitions. [2018-11-12 17:20:34,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-12 17:20:34,506 INFO L276 IsEmpty]: Start isEmpty. Operand 13785 states and 20633 transitions. [2018-11-12 17:20:34,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-11-12 17:20:34,545 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 17:20:34,545 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 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] [2018-11-12 17:20:34,546 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 17:20:34,546 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:20:34,546 INFO L82 PathProgramCache]: Analyzing trace with hash -448743141, now seen corresponding path program 1 times [2018-11-12 17:20:34,547 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 17:20:34,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:20:34,549 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:20:34,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:20:34,549 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 17:20:34,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:20:34,877 WARN L179 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-12 17:20:35,048 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-12 17:20:35,049 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 17:20:35,049 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 17:20:35,049 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 215 with the following transitions: [2018-11-12 17:20:35,052 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [24], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [68], [71], [75], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [877], [879], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-12 17:20:35,065 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 17:20:35,065 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 17:20:36,469 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 17:20:36,470 INFO L272 AbstractInterpreter]: Visited 181 different actions 356 times. Merged at 5 different actions 5 times. Never widened. Performed 8019 root evaluator evaluations with a maximum evaluation depth of 6. Performed 8019 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-12 17:20:36,475 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:20:36,475 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 17:20:37,599 INFO L227 lantSequenceWeakener]: Weakened 57 states. On average, predicates are now at 80.15% of their original sizes. [2018-11-12 17:20:37,600 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 17:20:39,486 INFO L415 sIntCurrentIteration]: We unified 213 AI predicates to 213 [2018-11-12 17:20:39,486 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 17:20:39,486 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 17:20:39,486 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [20] imperfect sequences [6] total 24 [2018-11-12 17:20:39,487 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 17:20:39,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-12 17:20:39,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-12 17:20:39,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2018-11-12 17:20:39,488 INFO L87 Difference]: Start difference. First operand 13785 states and 20633 transitions. Second operand 20 states. Received shutdown request... [2018-11-12 17:21:59,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-12 17:21:59,060 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-12 17:21:59,065 WARN L205 ceAbstractionStarter]: Timeout [2018-11-12 17:21:59,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 05:21:59 BoogieIcfgContainer [2018-11-12 17:21:59,066 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-12 17:21:59,066 INFO L168 Benchmark]: Toolchain (without parser) took 243166.48 ms. Allocated memory was 1.5 GB in the beginning and 4.0 GB in the end (delta: 2.5 GB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 130.4 MB). Peak memory consumption was 2.6 GB. Max. memory is 7.1 GB. [2018-11-12 17:21:59,068 INFO L168 Benchmark]: CDTParser took 0.20 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. [2018-11-12 17:21:59,068 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1184.08 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: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. [2018-11-12 17:21:59,069 INFO L168 Benchmark]: Boogie Procedure Inliner took 202.36 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 736.1 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -861.4 MB). Peak memory consumption was 38.8 MB. Max. memory is 7.1 GB. [2018-11-12 17:21:59,070 INFO L168 Benchmark]: Boogie Preprocessor took 138.34 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-12 17:21:59,070 INFO L168 Benchmark]: RCFGBuilder took 5374.82 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 265.7 MB). Peak memory consumption was 265.7 MB. Max. memory is 7.1 GB. [2018-11-12 17:21:59,071 INFO L168 Benchmark]: TraceAbstraction took 236261.04 ms. Allocated memory was 2.3 GB in the beginning and 4.0 GB in the end (delta: 1.8 GB). Free memory was 1.9 GB in the beginning and 1.3 GB in the end (delta: 641.5 MB). Peak memory consumption was 2.4 GB. Max. memory is 7.1 GB. [2018-11-12 17:21:59,076 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 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 1184.08 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: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 202.36 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 736.1 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -861.4 MB). Peak memory consumption was 38.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 138.34 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 5374.82 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 265.7 MB). Peak memory consumption was 265.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 236261.04 ms. Allocated memory was 2.3 GB in the beginning and 4.0 GB in the end (delta: 1.8 GB). Free memory was 1.9 GB in the beginning and 1.3 GB in the end (delta: 641.5 MB). Peak memory consumption was 2.4 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1545]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1545). Cancelled while BasicCegarLoop was constructing difference of abstraction (13785states) and FLOYD_HOARE automaton (currently 22 states, 20 states before enhancement),while ReachableStatesComputation was computing reachable states (25538 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 236.1s OverallTime, 8 OverallIterations, 3 TraceHistogramMax, 216.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2129 SDtfs, 9904 SDslu, 3930 SDs, 0 SdLazy, 17977 SolverSat, 1453 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 140.4s Time, PredicateUnifierStatistics: 6 DeclaredPredicates, 684 GetRequests, 562 SyntacticMatches, 18 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 6.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13785occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 5.7s AbstIntTime, 3 AbstIntIterations, 3 AbstIntStrong, 0.9991751915983881 AbsIntWeakeningRatio, 0.3167202572347267 AbsIntAvgWeakeningVarsNumRemoved, 52.757234726688104 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 1.2s AutomataMinimizationTime, 7 MinimizatonAttempts, 565 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 1570 NumberOfCodeBlocks, 1570 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 1562 ConstructedInterpolants, 0 QuantifiedInterpolants, 713655 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 5 PerfectInterpolantSequences, 142/148 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown