java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem12_label40_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 11:18:45,995 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 11:18:45,999 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 11:18:46,014 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 11:18:46,015 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 11:18:46,016 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 11:18:46,018 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 11:18:46,020 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 11:18:46,022 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 11:18:46,025 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 11:18:46,026 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 11:18:46,026 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 11:18:46,027 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 11:18:46,030 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 11:18:46,032 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 11:18:46,039 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 11:18:46,040 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 11:18:46,042 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 11:18:46,044 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 11:18:46,045 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 11:18:46,046 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 11:18:46,047 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 11:18:46,049 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 11:18:46,050 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 11:18:46,050 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 11:18:46,051 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 11:18:46,052 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 11:18:46,052 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 11:18:46,053 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 11:18:46,054 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 11:18:46,054 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 11:18:46,055 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-27 11:18:46,055 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 11:18:46,055 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 11:18:46,056 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 11:18:46,057 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 11:18:46,057 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf [2018-10-27 11:18:46,072 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 11:18:46,072 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 11:18:46,073 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 11:18:46,073 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 11:18:46,074 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 11:18:46,074 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 11:18:46,074 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 11:18:46,074 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-27 11:18:46,074 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 11:18:46,075 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 11:18:46,075 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 11:18:46,075 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 11:18:46,076 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 11:18:46,076 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 11:18:46,076 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 11:18:46,076 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 11:18:46,077 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 11:18:46,077 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 11:18:46,077 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 11:18:46,077 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 11:18:46,077 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 11:18:46,078 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 11:18:46,078 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 11:18:46,078 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 11:18:46,078 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 11:18:46,078 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 11:18:46,079 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 11:18:46,079 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 11:18:46,079 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 11:18:46,079 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 11:18:46,079 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 11:18:46,080 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 11:18:46,080 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 11:18:46,080 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 11:18:46,139 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 11:18:46,151 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 11:18:46,155 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 11:18:46,157 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 11:18:46,157 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 11:18:46,158 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label40_false-unreach-call.c [2018-10-27 11:18:46,233 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/4ac7a190e/f9a671b271b748c6be66048c877dace2/FLAG32bd29bee [2018-10-27 11:18:46,997 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 11:18:46,998 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label40_false-unreach-call.c [2018-10-27 11:18:47,032 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/4ac7a190e/f9a671b271b748c6be66048c877dace2/FLAG32bd29bee [2018-10-27 11:18:47,053 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/4ac7a190e/f9a671b271b748c6be66048c877dace2 [2018-10-27 11:18:47,066 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 11:18:47,068 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 11:18:47,069 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 11:18:47,070 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 11:18:47,076 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 11:18:47,077 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:18:47" (1/1) ... [2018-10-27 11:18:47,082 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b394b2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:18:47, skipping insertion in model container [2018-10-27 11:18:47,082 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:18:47" (1/1) ... [2018-10-27 11:18:47,094 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 11:18:47,263 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 11:18:48,504 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 11:18:48,511 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 11:18:49,116 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 11:18:49,149 INFO L193 MainTranslator]: Completed translation [2018-10-27 11:18:49,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:18:49 WrapperNode [2018-10-27 11:18:49,150 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 11:18:49,151 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 11:18:49,151 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 11:18:49,152 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 11:18:49,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:18:49" (1/1) ... [2018-10-27 11:18:49,230 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:18:49" (1/1) ... [2018-10-27 11:18:49,619 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 11:18:49,620 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 11:18:49,620 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 11:18:49,620 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 11:18:49,631 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:18:49" (1/1) ... [2018-10-27 11:18:49,631 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:18:49" (1/1) ... [2018-10-27 11:18:49,669 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:18:49" (1/1) ... [2018-10-27 11:18:49,670 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:18:49" (1/1) ... [2018-10-27 11:18:49,777 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:18:49" (1/1) ... [2018-10-27 11:18:49,812 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:18:49" (1/1) ... [2018-10-27 11:18:49,850 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:18:49" (1/1) ... [2018-10-27 11:18:49,896 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 11:18:49,897 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 11:18:49,897 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 11:18:49,897 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 11:18:49,898 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:18:49" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-27 11:18:49,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 11:18:49,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 11:18:49,968 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2018-10-27 11:18:49,969 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2018-10-27 11:18:49,969 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2018-10-27 11:18:49,969 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2018-10-27 11:18:49,969 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-27 11:18:49,969 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-27 11:18:49,970 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-27 11:18:49,970 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-27 11:18:49,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 11:18:49,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 11:18:49,970 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 11:18:49,971 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 11:19:01,512 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 11:19:01,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:19:01 BoogieIcfgContainer [2018-10-27 11:19:01,513 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 11:19:01,514 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 11:19:01,515 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 11:19:01,518 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 11:19:01,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 11:18:47" (1/3) ... [2018-10-27 11:19:01,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d763f12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:19:01, skipping insertion in model container [2018-10-27 11:19:01,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:18:49" (2/3) ... [2018-10-27 11:19:01,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d763f12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:19:01, skipping insertion in model container [2018-10-27 11:19:01,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:19:01" (3/3) ... [2018-10-27 11:19:01,522 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label40_false-unreach-call.c [2018-10-27 11:19:01,532 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 11:19:01,554 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 11:19:01,572 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 11:19:01,637 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 11:19:01,637 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 11:19:01,637 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 11:19:01,638 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 11:19:01,638 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 11:19:01,638 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 11:19:01,638 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 11:19:01,638 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 11:19:01,694 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states. [2018-10-27 11:19:01,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-27 11:19:01,702 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 11:19:01,703 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 11:19:01,705 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 11:19:01,712 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:19:01,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1589913364, now seen corresponding path program 1 times [2018-10-27 11:19:01,715 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 11:19:01,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:19:01,774 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 11:19:01,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:19:01,775 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 11:19:01,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 11:19:02,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 11:19:02,143 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 11:19:02,143 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 11:19:02,143 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 11:19:02,149 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 11:19:02,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 11:19:02,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 11:19:02,168 INFO L87 Difference]: Start difference. First operand 840 states. Second operand 4 states. [2018-10-27 11:19:15,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 11:19:15,298 INFO L93 Difference]: Finished difference Result 3234 states and 6255 transitions. [2018-10-27 11:19:15,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 11:19:15,301 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2018-10-27 11:19:15,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 11:19:15,339 INFO L225 Difference]: With dead ends: 3234 [2018-10-27 11:19:15,339 INFO L226 Difference]: Without dead ends: 2388 [2018-10-27 11:19:15,349 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 11:19:15,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2388 states. [2018-10-27 11:19:15,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2388 to 1604. [2018-10-27 11:19:15,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1604 states. [2018-10-27 11:19:15,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 2600 transitions. [2018-10-27 11:19:15,517 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 2600 transitions. Word has length 16 [2018-10-27 11:19:15,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 11:19:15,517 INFO L481 AbstractCegarLoop]: Abstraction has 1604 states and 2600 transitions. [2018-10-27 11:19:15,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 11:19:15,518 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 2600 transitions. [2018-10-27 11:19:15,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-27 11:19:15,526 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 11:19:15,526 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-27 11:19:15,527 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 11:19:15,527 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:19:15,527 INFO L82 PathProgramCache]: Analyzing trace with hash -510540602, now seen corresponding path program 1 times [2018-10-27 11:19:15,527 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 11:19:15,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:19:15,528 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 11:19:15,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:19:15,529 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 11:19:15,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 11:19:15,865 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 11:19:15,866 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 11:19:15,866 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-27 11:19:15,866 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 11:19:15,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 11:19:15,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 11:19:15,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-27 11:19:15,870 INFO L87 Difference]: Start difference. First operand 1604 states and 2600 transitions. Second operand 5 states. [2018-10-27 11:19:28,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 11:19:28,862 INFO L93 Difference]: Finished difference Result 4873 states and 7923 transitions. [2018-10-27 11:19:28,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-27 11:19:28,869 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 96 [2018-10-27 11:19:28,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 11:19:28,895 INFO L225 Difference]: With dead ends: 4873 [2018-10-27 11:19:28,895 INFO L226 Difference]: Without dead ends: 3275 [2018-10-27 11:19:28,901 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 11:19:28,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3275 states. [2018-10-27 11:19:29,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3275 to 3241. [2018-10-27 11:19:29,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3241 states. [2018-10-27 11:19:29,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3241 states to 3241 states and 4816 transitions. [2018-10-27 11:19:29,050 INFO L78 Accepts]: Start accepts. Automaton has 3241 states and 4816 transitions. Word has length 96 [2018-10-27 11:19:29,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 11:19:29,051 INFO L481 AbstractCegarLoop]: Abstraction has 3241 states and 4816 transitions. [2018-10-27 11:19:29,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 11:19:29,051 INFO L276 IsEmpty]: Start isEmpty. Operand 3241 states and 4816 transitions. [2018-10-27 11:19:29,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-10-27 11:19:29,063 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 11:19:29,064 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-27 11:19:29,064 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 11:19:29,064 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:19:29,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1964330847, now seen corresponding path program 1 times [2018-10-27 11:19:29,065 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 11:19:29,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:19:29,067 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 11:19:29,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:19:29,067 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 11:19:29,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 11:19:29,509 WARN L179 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 11:19:29,933 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 11:19:29,933 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 11:19:29,934 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 11:19:29,934 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 11:19:29,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 11:19:29,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 11:19:29,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 11:19:29,936 INFO L87 Difference]: Start difference. First operand 3241 states and 4816 transitions. Second operand 6 states. [2018-10-27 11:19:45,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 11:19:45,262 INFO L93 Difference]: Finished difference Result 12870 states and 19656 transitions. [2018-10-27 11:19:45,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 11:19:45,265 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 125 [2018-10-27 11:19:45,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 11:19:45,322 INFO L225 Difference]: With dead ends: 12870 [2018-10-27 11:19:45,323 INFO L226 Difference]: Without dead ends: 9635 [2018-10-27 11:19:45,344 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-27 11:19:45,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9635 states. [2018-10-27 11:19:45,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9635 to 9567. [2018-10-27 11:19:45,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9567 states. [2018-10-27 11:19:45,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9567 states to 9567 states and 13823 transitions. [2018-10-27 11:19:45,610 INFO L78 Accepts]: Start accepts. Automaton has 9567 states and 13823 transitions. Word has length 125 [2018-10-27 11:19:45,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 11:19:45,611 INFO L481 AbstractCegarLoop]: Abstraction has 9567 states and 13823 transitions. [2018-10-27 11:19:45,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 11:19:45,612 INFO L276 IsEmpty]: Start isEmpty. Operand 9567 states and 13823 transitions. [2018-10-27 11:19:45,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-10-27 11:19:45,626 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 11:19:45,626 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-27 11:19:45,627 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 11:19:45,627 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:19:45,627 INFO L82 PathProgramCache]: Analyzing trace with hash 369198727, now seen corresponding path program 1 times [2018-10-27 11:19:45,627 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 11:19:45,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:19:45,630 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 11:19:45,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:19:45,630 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 11:19:45,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 11:19:45,924 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 11:19:45,925 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 11:19:45,925 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 11:19:45,925 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 11:19:45,926 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 11:19:45,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 11:19:45,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 11:19:45,926 INFO L87 Difference]: Start difference. First operand 9567 states and 13823 transitions. Second operand 6 states. [2018-10-27 11:19:57,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 11:19:57,041 INFO L93 Difference]: Finished difference Result 25919 states and 39242 transitions. [2018-10-27 11:19:57,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 11:19:57,042 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 137 [2018-10-27 11:19:57,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 11:19:57,127 INFO L225 Difference]: With dead ends: 25919 [2018-10-27 11:19:57,128 INFO L226 Difference]: Without dead ends: 16358 [2018-10-27 11:19:57,159 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-27 11:19:57,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16358 states. [2018-10-27 11:19:57,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16358 to 16178. [2018-10-27 11:19:57,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16178 states. [2018-10-27 11:19:57,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16178 states to 16178 states and 23352 transitions. [2018-10-27 11:19:57,565 INFO L78 Accepts]: Start accepts. Automaton has 16178 states and 23352 transitions. Word has length 137 [2018-10-27 11:19:57,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 11:19:57,566 INFO L481 AbstractCegarLoop]: Abstraction has 16178 states and 23352 transitions. [2018-10-27 11:19:57,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 11:19:57,566 INFO L276 IsEmpty]: Start isEmpty. Operand 16178 states and 23352 transitions. [2018-10-27 11:19:57,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-10-27 11:19:57,569 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 11:19:57,569 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-27 11:19:57,569 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 11:19:57,570 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:19:57,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1940106815, now seen corresponding path program 1 times [2018-10-27 11:19:57,570 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 11:19:57,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:19:57,571 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 11:19:57,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:19:57,571 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 11:19:57,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 11:19:57,809 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 11:19:57,931 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 11:19:57,932 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 11:19:57,932 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 11:19:57,932 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 11:19:57,933 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 11:19:57,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 11:19:57,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 11:19:57,934 INFO L87 Difference]: Start difference. First operand 16178 states and 23352 transitions. Second operand 6 states. [2018-10-27 11:20:05,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 11:20:05,211 INFO L93 Difference]: Finished difference Result 39084 states and 58134 transitions. [2018-10-27 11:20:05,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 11:20:05,212 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 141 [2018-10-27 11:20:05,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 11:20:05,319 INFO L225 Difference]: With dead ends: 39084 [2018-10-27 11:20:05,320 INFO L226 Difference]: Without dead ends: 22912 [2018-10-27 11:20:05,371 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-27 11:20:05,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22912 states. [2018-10-27 11:20:05,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22912 to 22788. [2018-10-27 11:20:05,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22788 states. [2018-10-27 11:20:05,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22788 states to 22788 states and 31239 transitions. [2018-10-27 11:20:05,861 INFO L78 Accepts]: Start accepts. Automaton has 22788 states and 31239 transitions. Word has length 141 [2018-10-27 11:20:05,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 11:20:05,861 INFO L481 AbstractCegarLoop]: Abstraction has 22788 states and 31239 transitions. [2018-10-27 11:20:05,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 11:20:05,862 INFO L276 IsEmpty]: Start isEmpty. Operand 22788 states and 31239 transitions. [2018-10-27 11:20:05,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-10-27 11:20:05,864 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 11:20:05,864 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-27 11:20:05,864 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 11:20:05,865 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:20:05,868 INFO L82 PathProgramCache]: Analyzing trace with hash -232189726, now seen corresponding path program 1 times [2018-10-27 11:20:05,868 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 11:20:05,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:20:05,869 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 11:20:05,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:20:05,869 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 11:20:05,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 11:20:06,141 WARN L179 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 11:20:06,351 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-10-27 11:20:06,352 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 11:20:06,352 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 11:20:06,353 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 163 with the following transitions: [2018-10-27 11:20:06,356 INFO L202 CegarAbsIntRunner]: [0], [1], [1868], [1875], [1883], [1891], [1895], [1897], [1900], [1908], [1916], [1924], [1932], [1940], [1948], [1956], [1964], [1972], [1980], [1988], [1996], [2004], [2012], [2020], [2028], [2036], [2044], [2052], [2060], [2068], [2076], [2084], [2092], [2100], [2108], [2116], [2124], [2132], [2140], [2148], [2156], [2164], [2172], [2180], [2188], [2196], [2204], [2212], [2220], [2228], [2236], [2244], [2252], [2260], [2268], [2276], [2284], [2292], [2300], [2308], [2316], [2324], [2332], [2340], [2348], [2356], [2361], [2365], [2369], [2373], [2377], [2381], [2385], [2389], [2393], [2397], [2401], [2405], [2409], [2413], [2417], [2421], [2425], [2429], [2433], [2437], [2441], [2445], [2449], [2453], [2457], [2461], [2465], [2469], [2473], [2477], [2481], [2485], [2489], [2493], [2497], [2501], [2505], [2509], [2513], [2517], [2521], [2525], [2529], [2533], [2537], [2541], [2545], [2549], [2553], [2557], [2561], [2565], [2569], [2573], [2577], [2581], [2585], [2589], [2593], [2597], [2601], [2605], [2609], [2613], [2617], [2621], [2625], [2629], [2633], [2637], [2641], [2645], [2649], [2653], [2657], [2661], [2664], [3240], [3244], [3248], [3254], [3258], [3260], [3271], [3272], [3273], [3275], [3276] [2018-10-27 11:20:06,424 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 11:20:06,424 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 11:20:07,128 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 11:20:08,887 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 11:20:08,889 INFO L272 AbstractInterpreter]: Visited 153 different actions 300 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-27 11:20:08,928 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:20:08,929 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 11:20:10,026 INFO L227 lantSequenceWeakener]: Weakened 54 states. On average, predicates are now at 75.56% of their original sizes. [2018-10-27 11:20:10,027 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 11:20:10,494 INFO L415 sIntCurrentIteration]: We unified 161 AI predicates to 161 [2018-10-27 11:20:10,494 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 11:20:10,495 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 11:20:10,496 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [17] imperfect sequences [4] total 19 [2018-10-27 11:20:10,496 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 11:20:10,497 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-27 11:20:10,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-27 11:20:10,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2018-10-27 11:20:10,499 INFO L87 Difference]: Start difference. First operand 22788 states and 31239 transitions. Second operand 17 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown