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.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem13_label23_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-0fd1304 [2018-10-23 22:19:43,019 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-23 22:19:43,022 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-23 22:19:43,038 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-23 22:19:43,039 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-23 22:19:43,040 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-23 22:19:43,042 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-23 22:19:43,044 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-23 22:19:43,047 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-23 22:19:43,055 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-23 22:19:43,056 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-23 22:19:43,057 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-23 22:19:43,059 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-23 22:19:43,060 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-23 22:19:43,064 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-23 22:19:43,066 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-23 22:19:43,068 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-23 22:19:43,070 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-23 22:19:43,072 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-23 22:19:43,076 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-23 22:19:43,077 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-23 22:19:43,081 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-23 22:19:43,084 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-23 22:19:43,092 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-23 22:19:43,092 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-23 22:19:43,094 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-23 22:19:43,095 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-23 22:19:43,095 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf [2018-10-23 22:19:43,125 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-23 22:19:43,125 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-23 22:19:43,126 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-23 22:19:43,127 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-23 22:19:43,128 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-23 22:19:43,128 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-23 22:19:43,128 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-23 22:19:43,128 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-23 22:19:43,128 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-23 22:19:43,128 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-23 22:19:43,129 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-23 22:19:43,129 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-23 22:19:43,130 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-23 22:19:43,130 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-23 22:19:43,131 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-23 22:19:43,131 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-23 22:19:43,131 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-23 22:19:43,131 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-23 22:19:43,131 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-23 22:19:43,132 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-23 22:19:43,132 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-23 22:19:43,132 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-23 22:19:43,132 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-23 22:19:43,132 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-23 22:19:43,132 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 22:19:43,133 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-23 22:19:43,134 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-23 22:19:43,134 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-23 22:19:43,135 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-23 22:19:43,135 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-23 22:19:43,135 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-23 22:19:43,135 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-23 22:19:43,135 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-23 22:19:43,136 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-23 22:19:43,222 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-23 22:19:43,238 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-23 22:19:43,244 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-23 22:19:43,246 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-23 22:19:43,246 INFO L276 PluginConnector]: CDTParser initialized [2018-10-23 22:19:43,247 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label23_false-unreach-call.c [2018-10-23 22:19:43,325 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/fdadeb57e/d26d9ed807134c2283ac17213b0a1f80/FLAGf6771b39b [2018-10-23 22:19:44,163 INFO L298 CDTParser]: Found 1 translation units. [2018-10-23 22:19:44,164 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem13_label23_false-unreach-call.c [2018-10-23 22:19:44,200 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/fdadeb57e/d26d9ed807134c2283ac17213b0a1f80/FLAGf6771b39b [2018-10-23 22:19:44,218 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/fdadeb57e/d26d9ed807134c2283ac17213b0a1f80 [2018-10-23 22:19:44,231 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-23 22:19:44,233 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-23 22:19:44,234 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-23 22:19:44,234 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-23 22:19:44,240 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-23 22:19:44,241 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:19:44" (1/1) ... [2018-10-23 22:19:44,245 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@598699e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:19:44, skipping insertion in model container [2018-10-23 22:19:44,246 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:19:44" (1/1) ... [2018-10-23 22:19:44,258 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-23 22:19:44,435 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-23 22:19:45,941 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 22:19:45,946 INFO L189 MainTranslator]: Completed pre-run [2018-10-23 22:19:46,746 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 22:19:46,787 INFO L193 MainTranslator]: Completed translation [2018-10-23 22:19:46,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:19:46 WrapperNode [2018-10-23 22:19:46,788 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-23 22:19:46,789 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-23 22:19:46,790 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-23 22:19:46,790 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-23 22:19:46,801 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:19:46" (1/1) ... [2018-10-23 22:19:46,915 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:19:46" (1/1) ... [2018-10-23 22:19:47,453 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-23 22:19:47,454 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-23 22:19:47,454 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-23 22:19:47,454 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-23 22:19:47,466 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:19:46" (1/1) ... [2018-10-23 22:19:47,466 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:19:46" (1/1) ... [2018-10-23 22:19:47,516 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:19:46" (1/1) ... [2018-10-23 22:19:47,516 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:19:46" (1/1) ... [2018-10-23 22:19:47,674 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:19:46" (1/1) ... [2018-10-23 22:19:47,728 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:19:46" (1/1) ... [2018-10-23 22:19:47,779 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:19:46" (1/1) ... [2018-10-23 22:19:47,831 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-23 22:19:47,831 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-23 22:19:47,832 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-23 22:19:47,832 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-23 22:19:47,833 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:19:46" (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 [2018-10-23 22:19:47,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-23 22:19:47,910 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-23 22:19:47,910 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2018-10-23 22:19:47,911 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2018-10-23 22:19:47,911 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2018-10-23 22:19:47,911 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2018-10-23 22:19:47,911 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-23 22:19:47,911 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-23 22:19:47,912 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-23 22:19:47,912 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-23 22:19:47,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-23 22:19:47,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-23 22:19:47,912 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-23 22:19:47,913 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-23 22:19:59,086 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-23 22:19:59,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:19:59 BoogieIcfgContainer [2018-10-23 22:19:59,088 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-23 22:19:59,089 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-23 22:19:59,089 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-23 22:19:59,093 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-23 22:19:59,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 10:19:44" (1/3) ... [2018-10-23 22:19:59,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44536c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:19:59, skipping insertion in model container [2018-10-23 22:19:59,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:19:46" (2/3) ... [2018-10-23 22:19:59,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44536c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:19:59, skipping insertion in model container [2018-10-23 22:19:59,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:19:59" (3/3) ... [2018-10-23 22:19:59,097 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label23_false-unreach-call.c [2018-10-23 22:19:59,107 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-23 22:19:59,119 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-23 22:19:59,137 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-23 22:19:59,187 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-23 22:19:59,187 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-23 22:19:59,187 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-23 22:19:59,187 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-23 22:19:59,188 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-23 22:19:59,188 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-23 22:19:59,188 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-23 22:19:59,188 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-23 22:19:59,233 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states. [2018-10-23 22:19:59,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-23 22:19:59,240 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 22:19:59,242 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] [2018-10-23 22:19:59,244 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 22:19:59,251 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:19:59,251 INFO L82 PathProgramCache]: Analyzing trace with hash -2022894020, now seen corresponding path program 1 times [2018-10-23 22:19:59,254 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 22:19:59,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:19:59,314 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 22:19:59,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:19:59,314 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 22:19:59,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 22:19:59,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 22:19:59,641 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 22:19:59,641 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 22:19:59,641 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 22:19:59,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 22:19:59,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 22:19:59,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 22:19:59,669 INFO L87 Difference]: Start difference. First operand 1120 states. Second operand 4 states. [2018-10-23 22:20:14,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 22:20:14,455 INFO L93 Difference]: Finished difference Result 3968 states and 7392 transitions. [2018-10-23 22:20:14,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 22:20:14,458 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2018-10-23 22:20:14,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 22:20:14,503 INFO L225 Difference]: With dead ends: 3968 [2018-10-23 22:20:14,504 INFO L226 Difference]: Without dead ends: 2842 [2018-10-23 22:20:14,517 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 [2018-10-23 22:20:14,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2842 states. [2018-10-23 22:20:14,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2842 to 1981. [2018-10-23 22:20:14,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1981 states. [2018-10-23 22:20:14,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1981 states to 1981 states and 3456 transitions. [2018-10-23 22:20:14,701 INFO L78 Accepts]: Start accepts. Automaton has 1981 states and 3456 transitions. Word has length 20 [2018-10-23 22:20:14,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 22:20:14,702 INFO L481 AbstractCegarLoop]: Abstraction has 1981 states and 3456 transitions. [2018-10-23 22:20:14,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 22:20:14,703 INFO L276 IsEmpty]: Start isEmpty. Operand 1981 states and 3456 transitions. [2018-10-23 22:20:14,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-23 22:20:14,710 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 22:20:14,711 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-23 22:20:14,712 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 22:20:14,712 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:20:14,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1832037112, now seen corresponding path program 1 times [2018-10-23 22:20:14,712 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 22:20:14,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:20:14,714 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 22:20:14,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:20:14,714 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 22:20:14,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 22:20:15,027 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 22:20:15,027 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 22:20:15,028 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-23 22:20:15,028 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 22:20:15,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 22:20:15,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 22:20:15,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-23 22:20:15,032 INFO L87 Difference]: Start difference. First operand 1981 states and 3456 transitions. Second operand 5 states. [2018-10-23 22:20:29,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 22:20:29,749 INFO L93 Difference]: Finished difference Result 5673 states and 10081 transitions. [2018-10-23 22:20:29,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-23 22:20:29,751 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 90 [2018-10-23 22:20:29,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 22:20:29,789 INFO L225 Difference]: With dead ends: 5673 [2018-10-23 22:20:29,789 INFO L226 Difference]: Without dead ends: 3698 [2018-10-23 22:20:29,798 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-23 22:20:29,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3698 states. [2018-10-23 22:20:29,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3698 to 3687. [2018-10-23 22:20:29,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3687 states. [2018-10-23 22:20:29,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3687 states to 3687 states and 5870 transitions. [2018-10-23 22:20:29,932 INFO L78 Accepts]: Start accepts. Automaton has 3687 states and 5870 transitions. Word has length 90 [2018-10-23 22:20:29,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 22:20:29,933 INFO L481 AbstractCegarLoop]: Abstraction has 3687 states and 5870 transitions. [2018-10-23 22:20:29,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 22:20:29,933 INFO L276 IsEmpty]: Start isEmpty. Operand 3687 states and 5870 transitions. [2018-10-23 22:20:29,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-23 22:20:29,937 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 22:20:29,937 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-23 22:20:29,938 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 22:20:29,938 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:20:29,938 INFO L82 PathProgramCache]: Analyzing trace with hash -365462380, now seen corresponding path program 1 times [2018-10-23 22:20:29,938 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 22:20:29,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:20:29,940 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 22:20:29,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:20:29,940 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 22:20:29,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 22:20:30,265 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 22:20:30,265 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 22:20:30,265 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-23 22:20:30,265 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 22:20:30,266 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 22:20:30,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 22:20:30,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-23 22:20:30,267 INFO L87 Difference]: Start difference. First operand 3687 states and 5870 transitions. Second operand 5 states. [2018-10-23 22:20:45,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 22:20:45,291 INFO L93 Difference]: Finished difference Result 10963 states and 17865 transitions. [2018-10-23 22:20:45,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-23 22:20:45,301 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 92 [2018-10-23 22:20:45,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 22:20:45,341 INFO L225 Difference]: With dead ends: 10963 [2018-10-23 22:20:45,342 INFO L226 Difference]: Without dead ends: 7282 [2018-10-23 22:20:45,355 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-23 22:20:45,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7282 states. [2018-10-23 22:20:45,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7282 to 7175. [2018-10-23 22:20:45,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7175 states. [2018-10-23 22:20:45,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7175 states to 7175 states and 10520 transitions. [2018-10-23 22:20:45,553 INFO L78 Accepts]: Start accepts. Automaton has 7175 states and 10520 transitions. Word has length 92 [2018-10-23 22:20:45,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 22:20:45,553 INFO L481 AbstractCegarLoop]: Abstraction has 7175 states and 10520 transitions. [2018-10-23 22:20:45,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 22:20:45,554 INFO L276 IsEmpty]: Start isEmpty. Operand 7175 states and 10520 transitions. [2018-10-23 22:20:45,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-10-23 22:20:45,557 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 22:20:45,557 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-23 22:20:45,558 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 22:20:45,558 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:20:45,558 INFO L82 PathProgramCache]: Analyzing trace with hash -795381220, now seen corresponding path program 1 times [2018-10-23 22:20:45,558 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 22:20:45,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:20:45,559 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 22:20:45,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:20:45,560 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 22:20:45,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 22:20:45,709 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 22:20:45,709 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 22:20:45,709 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 22:20:45,710 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 22:20:45,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 22:20:45,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 22:20:45,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 22:20:45,711 INFO L87 Difference]: Start difference. First operand 7175 states and 10520 transitions. Second operand 3 states. [2018-10-23 22:20:54,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 22:20:54,353 INFO L93 Difference]: Finished difference Result 21003 states and 32063 transitions. [2018-10-23 22:20:54,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 22:20:54,354 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 136 [2018-10-23 22:20:54,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 22:20:54,422 INFO L225 Difference]: With dead ends: 21003 [2018-10-23 22:20:54,422 INFO L226 Difference]: Without dead ends: 13834 [2018-10-23 22:20:54,461 INFO L605 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 [2018-10-23 22:20:54,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13834 states. [2018-10-23 22:20:54,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13834 to 13825. [2018-10-23 22:20:54,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13825 states. [2018-10-23 22:20:54,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13825 states to 13825 states and 19394 transitions. [2018-10-23 22:20:54,807 INFO L78 Accepts]: Start accepts. Automaton has 13825 states and 19394 transitions. Word has length 136 [2018-10-23 22:20:54,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 22:20:54,808 INFO L481 AbstractCegarLoop]: Abstraction has 13825 states and 19394 transitions. [2018-10-23 22:20:54,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 22:20:54,808 INFO L276 IsEmpty]: Start isEmpty. Operand 13825 states and 19394 transitions. [2018-10-23 22:20:54,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-10-23 22:20:54,812 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 22:20:54,812 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-23 22:20:54,812 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 22:20:54,812 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:20:54,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1168062300, now seen corresponding path program 1 times [2018-10-23 22:20:54,813 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 22:20:54,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:20:54,814 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 22:20:54,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:20:54,814 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 22:20:54,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 22:20:55,031 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 22:20:55,031 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 22:20:55,032 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 22:20:55,032 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 22:20:55,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 22:20:55,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 22:20:55,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 22:20:55,035 INFO L87 Difference]: Start difference. First operand 13825 states and 19394 transitions. Second operand 4 states. [2018-10-23 22:21:04,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 22:21:04,472 INFO L93 Difference]: Finished difference Result 31681 states and 44253 transitions. [2018-10-23 22:21:04,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 22:21:04,478 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 141 [2018-10-23 22:21:04,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 22:21:04,531 INFO L225 Difference]: With dead ends: 31681 [2018-10-23 22:21:04,531 INFO L226 Difference]: Without dead ends: 17862 [2018-10-23 22:21:04,583 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 22:21:04,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17862 states. [2018-10-23 22:21:04,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17862 to 17861. [2018-10-23 22:21:04,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17861 states. [2018-10-23 22:21:04,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17861 states to 17861 states and 22138 transitions. [2018-10-23 22:21:04,966 INFO L78 Accepts]: Start accepts. Automaton has 17861 states and 22138 transitions. Word has length 141 [2018-10-23 22:21:04,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 22:21:04,967 INFO L481 AbstractCegarLoop]: Abstraction has 17861 states and 22138 transitions. [2018-10-23 22:21:04,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 22:21:04,967 INFO L276 IsEmpty]: Start isEmpty. Operand 17861 states and 22138 transitions. [2018-10-23 22:21:04,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2018-10-23 22:21:04,972 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 22:21:04,973 INFO L375 BasicCegarLoop]: trace histogram [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, 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] [2018-10-23 22:21:04,973 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 22:21:04,973 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:21:04,976 INFO L82 PathProgramCache]: Analyzing trace with hash -479794666, now seen corresponding path program 1 times [2018-10-23 22:21:04,976 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 22:21:04,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:21:04,977 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 22:21:04,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 22:21:04,977 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 22:21:05,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 22:21:05,273 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-23 22:21:05,646 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 94 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 22:21:05,646 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 22:21:05,646 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 22:21:05,648 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 212 with the following transitions: [2018-10-23 22:21:05,650 INFO L202 CegarAbsIntRunner]: [0], [1], [2628], [2635], [2643], [2651], [2659], [2667], [2675], [2683], [2687], [2689], [2692], [2700], [2708], [2716], [2724], [2732], [2740], [2748], [2756], [2764], [2772], [2780], [2788], [2796], [2804], [2812], [2820], [2828], [2836], [2844], [2852], [2860], [2868], [2876], [2884], [2892], [2900], [2908], [2916], [2924], [2932], [2940], [2948], [2956], [2964], [2972], [2980], [2988], [2996], [3004], [3012], [3020], [3028], [3036], [3044], [3052], [3060], [3068], [3076], [3084], [3092], [3100], [3108], [3116], [3120], [3121], [3125], [3129], [3133], [3137], [3148], [3152], [3156], [3160], [3164], [3168], [3179], [3183], [3187], [3191], [3195], [3199], [3203], [3207], [3218], [3222], [3226], [3230], [3234], [3238], [3242], [3246], [3250], [3254], [3258], [3262], [3266], [3270], [3274], [3278], [3282], [3286], [3290], [3294], [3305], [3309], [3313], [3317], [3321], [3325], [3329], [3333], [3344], [3355], [3358], [3361], [3365], [4238], [4242], [4246], [4252], [4256], [4258], [4269], [4270], [4271], [4273], [4274] [2018-10-23 22:21:05,728 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-23 22:21:05,729 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-23 22:21:08,907 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-23 22:21:14,520 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-23 22:21:14,522 INFO L272 AbstractInterpreter]: Visited 124 different actions 124 times. Never merged. Never widened. Never found a fixpoint. Largest state had 26 variables. [2018-10-23 22:21:14,547 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 22:21:14,547 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-23 22:21:18,592 INFO L232 lantSequenceWeakener]: Weakened 188 states. On average, predicates are now at 71.15% of their original sizes. [2018-10-23 22:21:18,593 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-23 22:21:20,702 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-23 22:21:20,703 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 22:21:20,703 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2018-10-23 22:21:20,703 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 22:21:20,704 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-23 22:21:20,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-23 22:21:20,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2018-10-23 22:21:20,705 INFO L87 Difference]: Start difference. First operand 17861 states and 22138 transitions. Second operand 11 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown