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_label04_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 18:48:35,027 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 18:48:35,030 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 18:48:35,050 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 18:48:35,050 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 18:48:35,051 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 18:48:35,053 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 18:48:35,055 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 18:48:35,056 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 18:48:35,057 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 18:48:35,058 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 18:48:35,059 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 18:48:35,059 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 18:48:35,060 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 18:48:35,062 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 18:48:35,063 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 18:48:35,063 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 18:48:35,066 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 18:48:35,071 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 18:48:35,076 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 18:48:35,078 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 18:48:35,082 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 18:48:35,088 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 18:48:35,088 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 18:48:35,088 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 18:48:35,089 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 18:48:35,094 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 18:48:35,095 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 18:48:35,096 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 18:48:35,099 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 18:48:35,100 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 18:48:35,102 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 18:48:35,102 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 18:48:35,103 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 18:48:35,104 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 18:48:35,104 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 18:48:35,106 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 18:48:35,126 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 18:48:35,126 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 18:48:35,127 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 18:48:35,127 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 18:48:35,127 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 18:48:35,128 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 18:48:35,128 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-07 18:48:35,128 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 18:48:35,128 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 18:48:35,128 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 18:48:35,129 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 18:48:35,129 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 18:48:35,129 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 18:48:35,130 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 18:48:35,130 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 18:48:35,130 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 18:48:35,130 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 18:48:35,131 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 18:48:35,131 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 18:48:35,131 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 18:48:35,131 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 18:48:35,132 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 18:48:35,132 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 18:48:35,132 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 18:48:35,132 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 18:48:35,132 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 18:48:35,133 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 18:48:35,133 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 18:48:35,133 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 18:48:35,133 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 18:48:35,133 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 18:48:35,134 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 18:48:35,134 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 18:48:35,134 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 18:48:35,134 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 18:48:35,183 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 18:48:35,204 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 18:48:35,208 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 18:48:35,209 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 18:48:35,210 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 18:48:35,210 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label04_true-unreach-call.c [2018-11-07 18:48:35,276 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5374bb93/753b50ee51ef4a91a71e87bdaa383300/FLAGbe0789976 [2018-11-07 18:48:36,006 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 18:48:36,007 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label04_true-unreach-call.c [2018-11-07 18:48:36,028 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5374bb93/753b50ee51ef4a91a71e87bdaa383300/FLAGbe0789976 [2018-11-07 18:48:36,047 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5374bb93/753b50ee51ef4a91a71e87bdaa383300 [2018-11-07 18:48:36,059 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 18:48:36,061 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 18:48:36,062 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 18:48:36,062 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 18:48:36,066 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 18:48:36,067 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:48:36" (1/1) ... [2018-11-07 18:48:36,071 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46117c5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:48:36, skipping insertion in model container [2018-11-07 18:48:36,072 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:48:36" (1/1) ... [2018-11-07 18:48:36,083 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 18:48:36,188 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 18:48:36,990 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 18:48:36,998 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 18:48:37,298 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 18:48:37,320 INFO L193 MainTranslator]: Completed translation [2018-11-07 18:48:37,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:48:37 WrapperNode [2018-11-07 18:48:37,321 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 18:48:37,322 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 18:48:37,322 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 18:48:37,322 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 18:48:37,332 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:48:37" (1/1) ... [2018-11-07 18:48:37,508 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:48:37" (1/1) ... [2018-11-07 18:48:37,516 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 18:48:37,516 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 18:48:37,517 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 18:48:37,517 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 18:48:37,534 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:48:37" (1/1) ... [2018-11-07 18:48:37,534 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:48:37" (1/1) ... [2018-11-07 18:48:37,546 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:48:37" (1/1) ... [2018-11-07 18:48:37,546 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:48:37" (1/1) ... [2018-11-07 18:48:37,608 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:48:37" (1/1) ... [2018-11-07 18:48:37,641 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:48:37" (1/1) ... [2018-11-07 18:48:37,664 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:48:37" (1/1) ... [2018-11-07 18:48:37,675 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 18:48:37,676 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 18:48:37,676 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 18:48:37,676 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 18:48:37,677 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:48:37" (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 18:48:37,742 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 18:48:37,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 18:48:37,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 18:48:37,742 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 18:48:37,743 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 18:48:37,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 18:48:37,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 18:48:37,743 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 18:48:37,743 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 18:48:42,101 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 18:48:42,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:48:42 BoogieIcfgContainer [2018-11-07 18:48:42,102 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 18:48:42,103 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 18:48:42,103 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 18:48:42,107 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 18:48:42,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 06:48:36" (1/3) ... [2018-11-07 18:48:42,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c4c2040 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:48:42, skipping insertion in model container [2018-11-07 18:48:42,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:48:37" (2/3) ... [2018-11-07 18:48:42,109 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c4c2040 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:48:42, skipping insertion in model container [2018-11-07 18:48:42,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:48:42" (3/3) ... [2018-11-07 18:48:42,111 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label04_true-unreach-call.c [2018-11-07 18:48:42,122 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 18:48:42,131 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 18:48:42,149 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 18:48:42,190 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 18:48:42,191 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 18:48:42,191 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 18:48:42,191 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 18:48:42,191 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 18:48:42,191 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 18:48:42,192 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 18:48:42,192 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 18:48:42,222 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-11-07 18:48:42,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2018-11-07 18:48:42,243 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:48:42,245 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, 1, 1, 1, 1, 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 18:48:42,247 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:48:42,255 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:48:42,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1740554548, now seen corresponding path program 1 times [2018-11-07 18:48:42,259 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:48:42,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:48:42,320 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:48:42,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:48:42,320 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:48:42,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:48:43,510 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 18:48:43,513 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:48:43,513 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 18:48:43,513 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:48:43,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 18:48:43,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 18:48:43,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 18:48:43,542 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 4 states. [2018-11-07 18:48:46,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:48:46,509 INFO L93 Difference]: Finished difference Result 1057 states and 1905 transitions. [2018-11-07 18:48:46,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 18:48:46,513 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 205 [2018-11-07 18:48:46,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:48:46,537 INFO L225 Difference]: With dead ends: 1057 [2018-11-07 18:48:46,537 INFO L226 Difference]: Without dead ends: 739 [2018-11-07 18:48:46,545 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 18:48:46,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2018-11-07 18:48:46,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 528. [2018-11-07 18:48:46,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 528 states. [2018-11-07 18:48:46,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 879 transitions. [2018-11-07 18:48:46,680 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 879 transitions. Word has length 205 [2018-11-07 18:48:46,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:48:46,684 INFO L480 AbstractCegarLoop]: Abstraction has 528 states and 879 transitions. [2018-11-07 18:48:46,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 18:48:46,684 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 879 transitions. [2018-11-07 18:48:46,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-11-07 18:48:46,702 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:48:46,703 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, 1, 1, 1, 1, 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 18:48:46,703 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:48:46,703 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:48:46,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1550134832, now seen corresponding path program 1 times [2018-11-07 18:48:46,706 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:48:46,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:48:46,707 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:48:46,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:48:46,710 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:48:46,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:48:47,127 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:48:47,127 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:48:47,127 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 18:48:47,127 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:48:47,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 18:48:47,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 18:48:47,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 18:48:47,133 INFO L87 Difference]: Start difference. First operand 528 states and 879 transitions. Second operand 3 states. [2018-11-07 18:48:48,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:48:48,985 INFO L93 Difference]: Finished difference Result 1482 states and 2549 transitions. [2018-11-07 18:48:48,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 18:48:48,986 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 218 [2018-11-07 18:48:48,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:48:48,994 INFO L225 Difference]: With dead ends: 1482 [2018-11-07 18:48:48,994 INFO L226 Difference]: Without dead ends: 960 [2018-11-07 18:48:49,002 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 18:48:49,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 960 states. [2018-11-07 18:48:49,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 960 to 946. [2018-11-07 18:48:49,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 946 states. [2018-11-07 18:48:49,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 1557 transitions. [2018-11-07 18:48:49,045 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 1557 transitions. Word has length 218 [2018-11-07 18:48:49,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:48:49,046 INFO L480 AbstractCegarLoop]: Abstraction has 946 states and 1557 transitions. [2018-11-07 18:48:49,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 18:48:49,046 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 1557 transitions. [2018-11-07 18:48:49,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2018-11-07 18:48:49,052 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:48:49,053 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 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 18:48:49,053 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:48:49,053 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:48:49,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1141936112, now seen corresponding path program 1 times [2018-11-07 18:48:49,054 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:48:49,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:48:49,055 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:48:49,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:48:49,055 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:48:49,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:48:49,268 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:48:49,268 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:48:49,268 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:48:49,269 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 230 with the following transitions: [2018-11-07 18:48:49,272 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [20], [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], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1025], [1033], [1041], [1049], [1057], [1065], [1073], [1081], [1089], [1097], [1101], [1103], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 18:48:49,337 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:48:49,337 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:48:50,791 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:48:50,793 INFO L272 AbstractInterpreter]: Visited 206 different actions 206 times. Never merged. Never widened. Never found a fixpoint. Largest state had 88 variables. [2018-11-07 18:48:50,836 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:48:50,836 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:48:52,154 INFO L227 lantSequenceWeakener]: Weakened 220 states. On average, predicates are now at 74.78% of their original sizes. [2018-11-07 18:48:52,154 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:48:53,295 INFO L415 sIntCurrentIteration]: We unified 228 AI predicates to 228 [2018-11-07 18:48:53,295 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:48:53,296 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:48:53,296 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [16] imperfect sequences [6] total 20 [2018-11-07 18:48:53,296 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:48:53,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-07 18:48:53,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-07 18:48:53,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2018-11-07 18:48:53,298 INFO L87 Difference]: Start difference. First operand 946 states and 1557 transitions. Second operand 16 states. [2018-11-07 18:49:34,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:49:34,354 INFO L93 Difference]: Finished difference Result 2096 states and 3461 transitions. [2018-11-07 18:49:34,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-07 18:49:34,354 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 229 [2018-11-07 18:49:34,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:49:34,361 INFO L225 Difference]: With dead ends: 2096 [2018-11-07 18:49:34,361 INFO L226 Difference]: Without dead ends: 1156 [2018-11-07 18:49:34,364 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 231 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2018-11-07 18:49:34,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2018-11-07 18:49:34,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 1154. [2018-11-07 18:49:34,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1154 states. [2018-11-07 18:49:34,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1154 states to 1154 states and 1775 transitions. [2018-11-07 18:49:34,395 INFO L78 Accepts]: Start accepts. Automaton has 1154 states and 1775 transitions. Word has length 229 [2018-11-07 18:49:34,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:49:34,396 INFO L480 AbstractCegarLoop]: Abstraction has 1154 states and 1775 transitions. [2018-11-07 18:49:34,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-07 18:49:34,396 INFO L276 IsEmpty]: Start isEmpty. Operand 1154 states and 1775 transitions. [2018-11-07 18:49:34,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-11-07 18:49:34,402 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:49:34,402 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 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 18:49:34,403 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:49:34,403 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:49:34,403 INFO L82 PathProgramCache]: Analyzing trace with hash 899426459, now seen corresponding path program 1 times [2018-11-07 18:49:34,403 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:49:34,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:49:34,404 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:49:34,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:49:34,405 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:49:34,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:49:34,769 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:49:34,769 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:49:34,770 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:49:34,770 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 239 with the following transitions: [2018-11-07 18:49:34,771 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [20], [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], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1025], [1033], [1041], [1049], [1057], [1065], [1073], [1081], [1089], [1097], [1101], [1103], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 18:49:34,781 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:49:34,781 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:49:36,681 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:49:36,681 INFO L272 AbstractInterpreter]: Visited 210 different actions 412 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-07 18:49:36,686 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:49:36,687 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:49:36,687 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:49:36,687 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 18:49:36,705 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:49:36,705 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:49:36,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:49:36,918 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:49:37,197 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:49:37,198 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:49:37,884 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:49:37,915 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:49:37,916 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2018-11-07 18:49:37,916 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:49:37,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-07 18:49:37,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-07 18:49:37,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2018-11-07 18:49:37,917 INFO L87 Difference]: Start difference. First operand 1154 states and 1775 transitions. Second operand 9 states. [2018-11-07 18:49:48,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:49:48,849 INFO L93 Difference]: Finished difference Result 9407 states and 19924 transitions. [2018-11-07 18:49:48,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-11-07 18:49:48,849 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 238 [2018-11-07 18:49:48,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:49:48,956 INFO L225 Difference]: With dead ends: 9407 [2018-11-07 18:49:48,956 INFO L226 Difference]: Without dead ends: 8467 [2018-11-07 18:49:48,999 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 499 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=312, Invalid=1248, Unknown=0, NotChecked=0, Total=1560 [2018-11-07 18:49:49,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8467 states. [2018-11-07 18:49:49,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8467 to 8098. [2018-11-07 18:49:49,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8098 states. [2018-11-07 18:49:49,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8098 states to 8098 states and 12823 transitions. [2018-11-07 18:49:49,367 INFO L78 Accepts]: Start accepts. Automaton has 8098 states and 12823 transitions. Word has length 238 [2018-11-07 18:49:49,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:49:49,367 INFO L480 AbstractCegarLoop]: Abstraction has 8098 states and 12823 transitions. [2018-11-07 18:49:49,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-07 18:49:49,368 INFO L276 IsEmpty]: Start isEmpty. Operand 8098 states and 12823 transitions. [2018-11-07 18:49:49,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-11-07 18:49:49,418 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:49:49,418 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, 1, 1, 1, 1, 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 18:49:49,419 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:49:49,419 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:49:49,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1302031735, now seen corresponding path program 1 times [2018-11-07 18:49:49,419 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:49:49,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:49:49,420 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:49:49,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:49:49,421 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:49:49,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:49:49,719 WARN L179 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 18:49:49,903 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-07 18:49:49,903 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:49:49,903 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:49:49,903 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 243 with the following transitions: [2018-11-07 18:49:49,904 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [24], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [68], [73], [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], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1025], [1033], [1041], [1049], [1057], [1065], [1073], [1081], [1089], [1097], [1101], [1103], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 18:49:49,912 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:49:49,912 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:49:52,585 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:49:52,586 INFO L272 AbstractInterpreter]: Visited 209 different actions 414 times. Merged at 5 different actions 7 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-07 18:49:52,591 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:49:52,591 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:49:54,057 INFO L227 lantSequenceWeakener]: Weakened 92 states. On average, predicates are now at 82.57% of their original sizes. [2018-11-07 18:49:54,057 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:49:55,872 INFO L415 sIntCurrentIteration]: We unified 241 AI predicates to 241 [2018-11-07 18:49:55,872 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:49:55,873 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:49:55,873 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [20] imperfect sequences [6] total 24 [2018-11-07 18:49:55,873 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:49:55,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-07 18:49:55,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-07 18:49:55,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2018-11-07 18:49:55,874 INFO L87 Difference]: Start difference. First operand 8098 states and 12823 transitions. Second operand 20 states. [2018-11-07 18:50:57,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:50:57,412 INFO L93 Difference]: Finished difference Result 16776 states and 26273 transitions. [2018-11-07 18:50:57,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-07 18:50:57,412 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 242 [2018-11-07 18:50:57,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:50:57,455 INFO L225 Difference]: With dead ends: 16776 [2018-11-07 18:50:57,456 INFO L226 Difference]: Without dead ends: 8892 [2018-11-07 18:50:57,488 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 250 GetRequests, 207 SyntacticMatches, 16 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=177, Invalid=635, Unknown=0, NotChecked=0, Total=812 [2018-11-07 18:50:57,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8892 states. [2018-11-07 18:50:57,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8892 to 8889. [2018-11-07 18:50:57,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8889 states. [2018-11-07 18:50:57,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8889 states to 8889 states and 13211 transitions. [2018-11-07 18:50:57,730 INFO L78 Accepts]: Start accepts. Automaton has 8889 states and 13211 transitions. Word has length 242 [2018-11-07 18:50:57,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:50:57,731 INFO L480 AbstractCegarLoop]: Abstraction has 8889 states and 13211 transitions. [2018-11-07 18:50:57,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-07 18:50:57,731 INFO L276 IsEmpty]: Start isEmpty. Operand 8889 states and 13211 transitions. [2018-11-07 18:50:57,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2018-11-07 18:50:57,763 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:50:57,763 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:50:57,763 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:50:57,764 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:50:57,764 INFO L82 PathProgramCache]: Analyzing trace with hash 244916885, now seen corresponding path program 1 times [2018-11-07 18:50:57,764 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:50:57,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:50:57,765 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:50:57,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:50:57,765 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:50:57,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:50:58,023 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 59 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:50:58,023 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:50:58,023 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:50:58,024 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 253 with the following transitions: [2018-11-07 18:50:58,024 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [68], [73], [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], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1025], [1033], [1041], [1049], [1057], [1065], [1073], [1081], [1089], [1097], [1101], [1103], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 18:50:58,030 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:50:58,031 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:50:59,452 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:50:59,452 INFO L272 AbstractInterpreter]: Visited 210 different actions 412 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-07 18:50:59,459 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:50:59,459 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:50:59,459 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:50:59,459 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 18:50:59,469 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:50:59,469 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:50:59,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:50:59,642 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:50:59,728 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-07 18:50:59,728 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:51:00,082 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-07 18:51:00,103 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:51:00,103 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-11-07 18:51:00,103 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:51:00,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 18:51:00,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 18:51:00,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-11-07 18:51:00,104 INFO L87 Difference]: Start difference. First operand 8889 states and 13211 transitions. Second operand 3 states. [2018-11-07 18:51:01,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:51:01,663 INFO L93 Difference]: Finished difference Result 24385 states and 38199 transitions. [2018-11-07 18:51:01,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 18:51:01,666 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 252 [2018-11-07 18:51:01,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:51:01,778 INFO L225 Difference]: With dead ends: 24385 [2018-11-07 18:51:01,778 INFO L226 Difference]: Without dead ends: 15919 [2018-11-07 18:51:01,806 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 502 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-11-07 18:51:01,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15919 states. [2018-11-07 18:51:02,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15919 to 15895. [2018-11-07 18:51:02,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15895 states. [2018-11-07 18:51:02,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15895 states to 15895 states and 24597 transitions. [2018-11-07 18:51:02,337 INFO L78 Accepts]: Start accepts. Automaton has 15895 states and 24597 transitions. Word has length 252 [2018-11-07 18:51:02,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:51:02,337 INFO L480 AbstractCegarLoop]: Abstraction has 15895 states and 24597 transitions. [2018-11-07 18:51:02,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 18:51:02,338 INFO L276 IsEmpty]: Start isEmpty. Operand 15895 states and 24597 transitions. [2018-11-07 18:51:02,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2018-11-07 18:51:02,392 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:51:02,393 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:51:02,393 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:51:02,393 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:51:02,393 INFO L82 PathProgramCache]: Analyzing trace with hash 378616459, now seen corresponding path program 1 times [2018-11-07 18:51:02,394 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:51:02,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:51:02,395 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:51:02,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:51:02,395 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:51:02,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:51:02,874 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 72 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-07 18:51:02,874 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:51:02,874 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:51:02,875 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 264 with the following transitions: [2018-11-07 18:51:02,875 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [20], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [68], [73], [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], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1025], [1033], [1041], [1049], [1057], [1065], [1073], [1081], [1089], [1097], [1101], [1103], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 18:51:02,881 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:51:02,881 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:51:05,199 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:51:05,200 INFO L272 AbstractInterpreter]: Visited 211 different actions 417 times. Merged at 5 different actions 7 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-07 18:51:05,209 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:51:05,209 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:51:05,209 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:51:05,209 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 18:51:05,219 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:51:05,219 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:51:05,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:51:05,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:51:05,615 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2018-11-07 18:51:05,615 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:51:06,051 WARN L179 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2018-11-07 18:51:06,252 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2018-11-07 18:51:06,286 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:51:06,286 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 8 [2018-11-07 18:51:06,286 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:51:06,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 18:51:06,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 18:51:06,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-11-07 18:51:06,289 INFO L87 Difference]: Start difference. First operand 15895 states and 24597 transitions. Second operand 3 states. [2018-11-07 18:51:07,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:51:07,900 INFO L93 Difference]: Finished difference Result 30654 states and 48334 transitions. [2018-11-07 18:51:07,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 18:51:07,901 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 263 [2018-11-07 18:51:07,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:51:07,993 INFO L225 Difference]: With dead ends: 30654 [2018-11-07 18:51:07,993 INFO L226 Difference]: Without dead ends: 20296 [2018-11-07 18:51:08,023 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 525 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-11-07 18:51:08,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20296 states. [2018-11-07 18:51:08,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20296 to 20291. [2018-11-07 18:51:08,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20291 states. [2018-11-07 18:51:08,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20291 states to 20291 states and 31422 transitions. [2018-11-07 18:51:08,522 INFO L78 Accepts]: Start accepts. Automaton has 20291 states and 31422 transitions. Word has length 263 [2018-11-07 18:51:08,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:51:08,523 INFO L480 AbstractCegarLoop]: Abstraction has 20291 states and 31422 transitions. [2018-11-07 18:51:08,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 18:51:08,523 INFO L276 IsEmpty]: Start isEmpty. Operand 20291 states and 31422 transitions. [2018-11-07 18:51:08,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2018-11-07 18:51:08,583 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:51:08,583 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:51:08,583 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:51:08,584 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:51:08,584 INFO L82 PathProgramCache]: Analyzing trace with hash -168769138, now seen corresponding path program 1 times [2018-11-07 18:51:08,584 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:51:08,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:51:08,585 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:51:08,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:51:08,585 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:51:08,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:51:09,176 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-11-07 18:51:09,263 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 132 proven. 34 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-07 18:51:09,264 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:51:09,264 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:51:09,264 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 322 with the following transitions: [2018-11-07 18:51:09,265 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [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], [123], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [240], [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], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1025], [1033], [1041], [1049], [1057], [1065], [1073], [1081], [1089], [1097], [1101], [1103], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 18:51:09,270 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:51:09,270 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:51:11,977 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:51:11,977 INFO L272 AbstractInterpreter]: Visited 211 different actions 625 times. Merged at 7 different actions 15 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 88 variables. [2018-11-07 18:51:11,987 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:51:11,987 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:51:11,987 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:51:11,987 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 18:51:11,996 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:51:11,996 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:51:12,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:51:12,200 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:51:12,418 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-11-07 18:51:12,418 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:51:13,050 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-11-07 18:51:13,088 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:51:13,089 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-11-07 18:51:13,089 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:51:13,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 18:51:13,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 18:51:13,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-11-07 18:51:13,092 INFO L87 Difference]: Start difference. First operand 20291 states and 31422 transitions. Second operand 3 states. [2018-11-07 18:51:15,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:51:15,008 INFO L93 Difference]: Finished difference Result 55612 states and 89132 transitions. [2018-11-07 18:51:15,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 18:51:15,009 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 321 [2018-11-07 18:51:15,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:51:15,156 INFO L225 Difference]: With dead ends: 55612 [2018-11-07 18:51:15,157 INFO L226 Difference]: Without dead ends: 36579 [2018-11-07 18:51:15,216 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 647 GetRequests, 640 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-11-07 18:51:15,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36579 states. [2018-11-07 18:51:16,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36579 to 36576. [2018-11-07 18:51:16,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36576 states. [2018-11-07 18:51:16,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36576 states to 36576 states and 55084 transitions. [2018-11-07 18:51:16,096 INFO L78 Accepts]: Start accepts. Automaton has 36576 states and 55084 transitions. Word has length 321 [2018-11-07 18:51:16,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:51:16,096 INFO L480 AbstractCegarLoop]: Abstraction has 36576 states and 55084 transitions. [2018-11-07 18:51:16,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 18:51:16,097 INFO L276 IsEmpty]: Start isEmpty. Operand 36576 states and 55084 transitions. [2018-11-07 18:51:16,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2018-11-07 18:51:16,171 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:51:16,172 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:51:16,172 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:51:16,172 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:51:16,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1671326373, now seen corresponding path program 1 times [2018-11-07 18:51:16,172 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:51:16,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:51:16,173 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:51:16,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:51:16,174 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:51:16,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:51:16,566 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 142 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-07 18:51:16,567 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:51:16,567 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:51:16,567 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 334 with the following transitions: [2018-11-07 18:51:16,567 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [68], [73], [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], [342], [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], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1025], [1033], [1041], [1049], [1057], [1065], [1073], [1081], [1089], [1097], [1101], [1103], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 18:51:16,572 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:51:16,572 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:51:18,252 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:51:18,252 INFO L272 AbstractInterpreter]: Visited 211 different actions 414 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-07 18:51:18,269 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:51:18,269 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:51:18,269 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:51:18,269 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:51:18,277 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:51:18,278 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:51:18,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:51:18,478 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:51:18,579 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 163 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-07 18:51:18,579 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:51:18,813 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 163 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-07 18:51:18,835 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:51:18,835 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2018-11-07 18:51:18,835 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:51:18,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-07 18:51:18,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-07 18:51:18,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-11-07 18:51:18,837 INFO L87 Difference]: Start difference. First operand 36576 states and 55084 transitions. Second operand 9 states. [2018-11-07 18:51:23,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:51:23,091 INFO L93 Difference]: Finished difference Result 138268 states and 231104 transitions. [2018-11-07 18:51:23,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-07 18:51:23,091 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 333 [2018-11-07 18:51:23,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:51:23,743 INFO L225 Difference]: With dead ends: 138268 [2018-11-07 18:51:23,743 INFO L226 Difference]: Without dead ends: 102960 [2018-11-07 18:51:23,871 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 682 GetRequests, 666 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2018-11-07 18:51:23,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102960 states. [2018-11-07 18:51:26,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102960 to 101993. [2018-11-07 18:51:26,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101993 states. [2018-11-07 18:51:27,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101993 states to 101993 states and 155413 transitions. [2018-11-07 18:51:27,047 INFO L78 Accepts]: Start accepts. Automaton has 101993 states and 155413 transitions. Word has length 333 [2018-11-07 18:51:27,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:51:27,048 INFO L480 AbstractCegarLoop]: Abstraction has 101993 states and 155413 transitions. [2018-11-07 18:51:27,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-07 18:51:27,048 INFO L276 IsEmpty]: Start isEmpty. Operand 101993 states and 155413 transitions. [2018-11-07 18:51:27,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2018-11-07 18:51:27,332 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:51:27,333 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 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] [2018-11-07 18:51:27,333 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:51:27,333 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:51:27,334 INFO L82 PathProgramCache]: Analyzing trace with hash 606260825, now seen corresponding path program 1 times [2018-11-07 18:51:27,334 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:51:27,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:51:27,335 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:51:27,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:51:27,335 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:51:27,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:51:28,003 WARN L179 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-11-07 18:51:28,285 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 171 proven. 45 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-07 18:51:28,285 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:51:28,285 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:51:28,285 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 361 with the following transitions: [2018-11-07 18:51:28,286 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [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], [174], [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], [366], [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], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1025], [1033], [1041], [1049], [1057], [1065], [1073], [1081], [1089], [1097], [1101], [1103], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 18:51:28,291 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:51:28,291 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:51:32,123 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:51:32,123 INFO L272 AbstractInterpreter]: Visited 211 different actions 630 times. Merged at 7 different actions 20 times. Never widened. Found 3 fixpoints after 3 different actions. Largest state had 88 variables. [2018-11-07 18:51:32,135 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:51:32,135 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:51:32,135 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:51:32,135 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:51:32,144 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:51:32,144 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:51:32,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:51:32,366 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:51:32,465 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 215 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-07 18:51:32,465 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:51:32,609 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 215 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-07 18:51:32,630 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:51:32,630 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2018-11-07 18:51:32,630 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:51:32,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-07 18:51:32,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-07 18:51:32,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-11-07 18:51:32,631 INFO L87 Difference]: Start difference. First operand 101993 states and 155413 transitions. Second operand 9 states. [2018-11-07 18:51:41,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:51:41,662 INFO L93 Difference]: Finished difference Result 210593 states and 343863 transitions. [2018-11-07 18:51:41,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-11-07 18:51:41,663 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 360 [2018-11-07 18:51:41,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:51:42,198 INFO L225 Difference]: With dead ends: 210593 [2018-11-07 18:51:42,198 INFO L226 Difference]: Without dead ends: 110294 [2018-11-07 18:51:42,410 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 804 GetRequests, 754 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=500, Invalid=1950, Unknown=0, NotChecked=0, Total=2450 [2018-11-07 18:51:42,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110294 states. [2018-11-07 18:51:45,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110294 to 105890. [2018-11-07 18:51:45,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105890 states. [2018-11-07 18:51:45,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105890 states to 105890 states and 141586 transitions. [2018-11-07 18:51:45,577 INFO L78 Accepts]: Start accepts. Automaton has 105890 states and 141586 transitions. Word has length 360 [2018-11-07 18:51:45,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:51:45,578 INFO L480 AbstractCegarLoop]: Abstraction has 105890 states and 141586 transitions. [2018-11-07 18:51:45,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-07 18:51:45,578 INFO L276 IsEmpty]: Start isEmpty. Operand 105890 states and 141586 transitions. [2018-11-07 18:51:45,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2018-11-07 18:51:45,788 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:51:45,789 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:51:45,789 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:51:45,789 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:51:45,790 INFO L82 PathProgramCache]: Analyzing trace with hash 61775672, now seen corresponding path program 1 times [2018-11-07 18:51:45,790 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:51:45,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:51:45,791 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:51:45,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:51:45,792 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:51:45,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:51:46,529 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 267 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:51:46,529 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:51:46,529 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:51:46,530 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 394 with the following transitions: [2018-11-07 18:51:46,530 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [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], [366], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [436], [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], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1025], [1033], [1041], [1049], [1057], [1065], [1073], [1081], [1089], [1097], [1101], [1103], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 18:51:46,539 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:51:46,539 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:51:49,040 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:51:49,040 INFO L272 AbstractInterpreter]: Visited 209 different actions 412 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-07 18:51:49,045 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:51:49,045 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:51:50,498 INFO L227 lantSequenceWeakener]: Weakened 390 states. On average, predicates are now at 72.6% of their original sizes. [2018-11-07 18:51:50,499 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:51:50,811 INFO L415 sIntCurrentIteration]: We unified 392 AI predicates to 392 [2018-11-07 18:51:50,811 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:51:50,812 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:51:50,812 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [18] imperfect sequences [6] total 22 [2018-11-07 18:51:50,812 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:51:50,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-07 18:51:50,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-07 18:51:50,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2018-11-07 18:51:50,813 INFO L87 Difference]: Start difference. First operand 105890 states and 141586 transitions. Second operand 18 states. Received shutdown request... [2018-11-07 18:52:23,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-07 18:52:23,607 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 18:52:23,611 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 18:52:23,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 06:52:23 BoogieIcfgContainer [2018-11-07 18:52:23,612 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 18:52:23,613 INFO L168 Benchmark]: Toolchain (without parser) took 227552.86 ms. Allocated memory was 1.5 GB in the beginning and 4.6 GB in the end (delta: 3.1 GB). Free memory was 1.4 GB in the beginning and 3.2 GB in the end (delta: -1.8 GB). Peak memory consumption was 1.3 GB. Max. memory is 7.1 GB. [2018-11-07 18:52:23,614 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 18:52:23,614 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1260.02 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. [2018-11-07 18:52:23,615 INFO L168 Benchmark]: Boogie Procedure Inliner took 194.07 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 743.4 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -866.6 MB). Peak memory consumption was 28.1 MB. Max. memory is 7.1 GB. [2018-11-07 18:52:23,616 INFO L168 Benchmark]: Boogie Preprocessor took 158.84 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. [2018-11-07 18:52:23,616 INFO L168 Benchmark]: RCFGBuilder took 4426.73 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 248.1 MB). Peak memory consumption was 248.1 MB. Max. memory is 7.1 GB. [2018-11-07 18:52:23,617 INFO L168 Benchmark]: TraceAbstraction took 221508.76 ms. Allocated memory was 2.3 GB in the beginning and 4.6 GB in the end (delta: 2.3 GB). Free memory was 2.0 GB in the beginning and 3.2 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. [2018-11-07 18:52:23,621 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1260.02 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 194.07 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 743.4 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -866.6 MB). Peak memory consumption was 28.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 158.84 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 4426.73 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 248.1 MB). Peak memory consumption was 248.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 221508.76 ms. Allocated memory was 2.3 GB in the beginning and 4.6 GB in the end (delta: 2.3 GB). Free memory was 2.0 GB in the beginning and 3.2 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1629]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1629). Cancelled while BasicCegarLoop was constructing difference of abstraction (105890states) and FLOYD_HOARE automaton (currently 14 states, 18 states before enhancement),while ReachableStatesComputation was computing reachable states (10955 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 221.4s OverallTime, 11 OverallIterations, 4 TraceHistogramMax, 171.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3342 SDtfs, 14454 SDslu, 3658 SDs, 0 SdLazy, 27043 SolverSat, 4653 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 102.6s Time, PredicateUnifierStatistics: 6 DeclaredPredicates, 4602 GetRequests, 4390 SyntacticMatches, 23 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1521 ImplicationChecksByTransitivity, 9.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=105890occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 20.7s AbstIntTime, 9 AbstIntIterations, 3 AbstIntStrong, 0.9993096095532639 AbsIntWeakeningRatio, 0.21951219512195122 AbsIntAvgWeakeningVarsNumRemoved, 56.91056910569106 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 9.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 6002 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 8.2s InterpolantComputationTime, 4821 NumberOfCodeBlocks, 4821 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 6565 ConstructedInterpolants, 0 QuantifiedInterpolants, 4286480 SizeOfPredicates, 9 NumberOfNonLiveVariables, 7296 ConjunctsInSsa, 24 ConjunctsInUnsatCore, 23 InterpolantComputations, 8 PerfectInterpolantSequences, 2604/2737 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown