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/Problem10_label16_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 02:20:08,074 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 02:20:08,079 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 02:20:08,097 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 02:20:08,098 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 02:20:08,099 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 02:20:08,100 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 02:20:08,103 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 02:20:08,107 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 02:20:08,108 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 02:20:08,108 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 02:20:08,117 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 02:20:08,119 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 02:20:08,120 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 02:20:08,121 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 02:20:08,124 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 02:20:08,125 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 02:20:08,129 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 02:20:08,131 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 02:20:08,136 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 02:20:08,139 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 02:20:08,140 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 02:20:08,143 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-27 02:20:08,152 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 02:20:08,152 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 02:20:08,154 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 02:20:08,155 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 02:20:08,155 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 [2018-10-27 02:20:08,187 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 02:20:08,188 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 02:20:08,189 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 02:20:08,192 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 02:20:08,192 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 02:20:08,192 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 02:20:08,192 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 02:20:08,192 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 02:20:08,193 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 02:20:08,193 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 02:20:08,193 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 02:20:08,193 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-27 02:20:08,194 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 02:20:08,194 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 02:20:08,194 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 02:20:08,195 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 02:20:08,195 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 02:20:08,196 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 02:20:08,196 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 02:20:08,196 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 02:20:08,196 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 02:20:08,196 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 02:20:08,197 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 02:20:08,197 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 02:20:08,197 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 02:20:08,197 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 02:20:08,197 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 02:20:08,197 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 02:20:08,198 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 02:20:08,198 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 02:20:08,198 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 02:20:08,198 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 02:20:08,199 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 02:20:08,199 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 02:20:08,246 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 02:20:08,259 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 02:20:08,263 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 02:20:08,265 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 02:20:08,265 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 02:20:08,266 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label16_true-unreach-call.c [2018-10-27 02:20:08,318 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/c6463899c/38d1856604514eda80c3035551c7d7ff/FLAGc1fb432db [2018-10-27 02:20:08,906 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 02:20:08,907 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label16_true-unreach-call.c [2018-10-27 02:20:08,931 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/c6463899c/38d1856604514eda80c3035551c7d7ff/FLAGc1fb432db [2018-10-27 02:20:08,947 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/c6463899c/38d1856604514eda80c3035551c7d7ff [2018-10-27 02:20:08,959 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 02:20:08,960 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 02:20:08,961 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 02:20:08,961 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 02:20:08,967 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 02:20:08,968 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:20:08" (1/1) ... [2018-10-27 02:20:08,971 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79efdec5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:20:08, skipping insertion in model container [2018-10-27 02:20:08,971 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:20:08" (1/1) ... [2018-10-27 02:20:08,981 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 02:20:09,054 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 02:20:09,480 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 02:20:09,484 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 02:20:09,586 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 02:20:09,603 INFO L193 MainTranslator]: Completed translation [2018-10-27 02:20:09,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:20:09 WrapperNode [2018-10-27 02:20:09,604 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 02:20:09,605 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 02:20:09,605 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 02:20:09,605 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 02:20:09,614 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:20:09" (1/1) ... [2018-10-27 02:20:09,633 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:20:09" (1/1) ... [2018-10-27 02:20:09,800 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 02:20:09,801 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 02:20:09,801 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 02:20:09,801 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 02:20:09,814 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:20:09" (1/1) ... [2018-10-27 02:20:09,814 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:20:09" (1/1) ... [2018-10-27 02:20:09,833 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:20:09" (1/1) ... [2018-10-27 02:20:09,833 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:20:09" (1/1) ... [2018-10-27 02:20:09,879 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:20:09" (1/1) ... [2018-10-27 02:20:09,903 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:20:09" (1/1) ... [2018-10-27 02:20:09,913 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:20:09" (1/1) ... [2018-10-27 02:20:09,924 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 02:20:09,924 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 02:20:09,924 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 02:20:09,925 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 02:20:09,925 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:20:09" (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 02:20:09,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 02:20:09,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 02:20:09,997 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-27 02:20:09,997 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-27 02:20:09,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 02:20:09,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 02:20:09,998 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 02:20:09,998 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 02:20:13,175 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 02:20:13,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:20:13 BoogieIcfgContainer [2018-10-27 02:20:13,176 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 02:20:13,177 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 02:20:13,177 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 02:20:13,184 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 02:20:13,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:20:08" (1/3) ... [2018-10-27 02:20:13,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@383af6ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:20:13, skipping insertion in model container [2018-10-27 02:20:13,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:20:09" (2/3) ... [2018-10-27 02:20:13,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@383af6ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:20:13, skipping insertion in model container [2018-10-27 02:20:13,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:20:13" (3/3) ... [2018-10-27 02:20:13,188 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem10_label16_true-unreach-call.c [2018-10-27 02:20:13,196 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 02:20:13,204 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 02:20:13,219 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 02:20:13,257 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 02:20:13,258 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 02:20:13,258 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 02:20:13,258 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 02:20:13,258 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 02:20:13,259 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 02:20:13,259 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 02:20:13,259 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 02:20:13,286 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states. [2018-10-27 02:20:13,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-27 02:20:13,294 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 02:20:13,295 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 02:20:13,297 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 02:20:13,303 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 02:20:13,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1339291892, now seen corresponding path program 1 times [2018-10-27 02:20:13,305 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 02:20:13,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 02:20:13,352 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 02:20:13,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 02:20:13,352 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 02:20:13,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 02:20:13,725 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 02:20:13,750 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 02:20:13,752 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 02:20:13,753 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 02:20:13,754 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 02:20:13,760 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 02:20:13,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 02:20:13,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 02:20:13,779 INFO L87 Difference]: Start difference. First operand 216 states. Second operand 3 states. [2018-10-27 02:20:16,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 02:20:16,081 INFO L93 Difference]: Finished difference Result 574 states and 992 transitions. [2018-10-27 02:20:16,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 02:20:16,083 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2018-10-27 02:20:16,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 02:20:16,104 INFO L225 Difference]: With dead ends: 574 [2018-10-27 02:20:16,104 INFO L226 Difference]: Without dead ends: 356 [2018-10-27 02:20:16,118 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 02:20:16,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2018-10-27 02:20:16,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 356. [2018-10-27 02:20:16,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356 states. [2018-10-27 02:20:16,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 609 transitions. [2018-10-27 02:20:16,215 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 609 transitions. Word has length 40 [2018-10-27 02:20:16,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 02:20:16,216 INFO L481 AbstractCegarLoop]: Abstraction has 356 states and 609 transitions. [2018-10-27 02:20:16,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 02:20:16,216 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 609 transitions. [2018-10-27 02:20:16,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-10-27 02:20:16,225 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 02:20:16,226 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:20:16,226 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 02:20:16,226 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 02:20:16,227 INFO L82 PathProgramCache]: Analyzing trace with hash 281575248, now seen corresponding path program 1 times [2018-10-27 02:20:16,227 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 02:20:16,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 02:20:16,228 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 02:20:16,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 02:20:16,229 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 02:20:16,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 02:20:16,585 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 02:20:16,586 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 02:20:16,586 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 02:20:16,586 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 02:20:16,588 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 02:20:16,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 02:20:16,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 02:20:16,589 INFO L87 Difference]: Start difference. First operand 356 states and 609 transitions. Second operand 4 states. [2018-10-27 02:20:18,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 02:20:18,514 INFO L93 Difference]: Finished difference Result 1282 states and 2328 transitions. [2018-10-27 02:20:18,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 02:20:18,524 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 160 [2018-10-27 02:20:18,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 02:20:18,535 INFO L225 Difference]: With dead ends: 1282 [2018-10-27 02:20:18,536 INFO L226 Difference]: Without dead ends: 932 [2018-10-27 02:20:18,540 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 02:20:18,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2018-10-27 02:20:18,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 932. [2018-10-27 02:20:18,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 932 states. [2018-10-27 02:20:18,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1471 transitions. [2018-10-27 02:20:18,614 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1471 transitions. Word has length 160 [2018-10-27 02:20:18,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 02:20:18,617 INFO L481 AbstractCegarLoop]: Abstraction has 932 states and 1471 transitions. [2018-10-27 02:20:18,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 02:20:18,618 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1471 transitions. [2018-10-27 02:20:18,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-10-27 02:20:18,632 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 02:20:18,633 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:20:18,633 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 02:20:18,633 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 02:20:18,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1010805092, now seen corresponding path program 1 times [2018-10-27 02:20:18,634 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 02:20:18,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 02:20:18,635 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 02:20:18,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 02:20:18,635 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 02:20:18,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 02:20:18,869 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 02:20:18,869 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 02:20:18,870 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-27 02:20:18,870 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 02:20:18,871 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 02:20:18,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 02:20:18,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-27 02:20:18,872 INFO L87 Difference]: Start difference. First operand 932 states and 1471 transitions. Second operand 5 states. [2018-10-27 02:20:24,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 02:20:24,608 INFO L93 Difference]: Finished difference Result 2963 states and 4727 transitions. [2018-10-27 02:20:24,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-27 02:20:24,611 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 166 [2018-10-27 02:20:24,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 02:20:24,626 INFO L225 Difference]: With dead ends: 2963 [2018-10-27 02:20:24,627 INFO L226 Difference]: Without dead ends: 2037 [2018-10-27 02:20:24,637 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-27 02:20:24,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2037 states. [2018-10-27 02:20:24,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2037 to 1989. [2018-10-27 02:20:24,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1989 states. [2018-10-27 02:20:24,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1989 states to 1989 states and 2876 transitions. [2018-10-27 02:20:24,710 INFO L78 Accepts]: Start accepts. Automaton has 1989 states and 2876 transitions. Word has length 166 [2018-10-27 02:20:24,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 02:20:24,711 INFO L481 AbstractCegarLoop]: Abstraction has 1989 states and 2876 transitions. [2018-10-27 02:20:24,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 02:20:24,711 INFO L276 IsEmpty]: Start isEmpty. Operand 1989 states and 2876 transitions. [2018-10-27 02:20:24,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2018-10-27 02:20:24,724 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 02:20:24,726 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-27 02:20:24,727 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 02:20:24,727 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 02:20:24,727 INFO L82 PathProgramCache]: Analyzing trace with hash -269187157, now seen corresponding path program 1 times [2018-10-27 02:20:24,727 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 02:20:24,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 02:20:24,729 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 02:20:24,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 02:20:24,729 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 02:20:24,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 02:20:25,108 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 66 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-27 02:20:25,109 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 02:20:25,109 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 02:20:25,110 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 242 with the following transitions: [2018-10-27 02:20:25,112 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [221], [223], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [514], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [718], [792], [796], [800], [806], [810], [812], [817], [818], [819], [821], [822] [2018-10-27 02:20:25,196 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-27 02:20:25,196 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 02:20:29,601 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 02:20:29,603 INFO L272 AbstractInterpreter]: Visited 131 different actions 131 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-10-27 02:20:29,634 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 02:20:29,635 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 02:20:33,287 INFO L227 lantSequenceWeakener]: Weakened 220 states. On average, predicates are now at 73.41% of their original sizes. [2018-10-27 02:20:33,288 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 02:20:40,513 INFO L415 sIntCurrentIteration]: We unified 240 AI predicates to 240 [2018-10-27 02:20:40,513 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 02:20:40,514 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 02:20:40,514 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2018-10-27 02:20:40,515 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 02:20:40,515 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-27 02:20:40,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-27 02:20:40,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2018-10-27 02:20:40,516 INFO L87 Difference]: Start difference. First operand 1989 states and 2876 transitions. Second operand 11 states. [2018-10-27 02:20:53,714 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 02:21:29,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 02:21:29,631 INFO L93 Difference]: Finished difference Result 4121 states and 5985 transitions. [2018-10-27 02:21:29,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-27 02:21:29,632 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 241 [2018-10-27 02:21:29,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 02:21:29,645 INFO L225 Difference]: With dead ends: 4121 [2018-10-27 02:21:29,645 INFO L226 Difference]: Without dead ends: 2138 [2018-10-27 02:21:29,656 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 245 GetRequests, 182 SyntacticMatches, 49 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2018-10-27 02:21:29,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2138 states. [2018-10-27 02:21:29,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2138 to 2133. [2018-10-27 02:21:29,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2133 states. [2018-10-27 02:21:29,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2133 states to 2133 states and 3027 transitions. [2018-10-27 02:21:29,742 INFO L78 Accepts]: Start accepts. Automaton has 2133 states and 3027 transitions. Word has length 241 [2018-10-27 02:21:29,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 02:21:29,743 INFO L481 AbstractCegarLoop]: Abstraction has 2133 states and 3027 transitions. [2018-10-27 02:21:29,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-27 02:21:29,743 INFO L276 IsEmpty]: Start isEmpty. Operand 2133 states and 3027 transitions. [2018-10-27 02:21:29,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2018-10-27 02:21:29,752 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 02:21:29,752 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-27 02:21:29,753 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 02:21:29,753 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 02:21:29,753 INFO L82 PathProgramCache]: Analyzing trace with hash -2003197064, now seen corresponding path program 1 times [2018-10-27 02:21:29,753 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 02:21:29,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 02:21:29,755 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 02:21:29,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 02:21:29,755 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 02:21:29,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 02:21:30,301 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 144 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 02:21:30,302 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 02:21:30,302 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 02:21:30,302 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 247 with the following transitions: [2018-10-27 02:21:30,303 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [221], [223], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [534], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [718], [792], [796], [800], [806], [810], [812], [817], [818], [819], [821], [822] [2018-10-27 02:21:30,310 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-27 02:21:30,310 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 02:21:32,014 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 02:21:51,898 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 02:21:51,898 INFO L272 AbstractInterpreter]: Visited 134 different actions 774 times. Merged at 5 different actions 25 times. Widened at 1 different actions 1 times. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-10-27 02:21:51,905 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 02:21:51,905 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 02:21:54,855 INFO L227 lantSequenceWeakener]: Weakened 40 states. On average, predicates are now at 74.89% of their original sizes. [2018-10-27 02:21:54,855 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 02:22:31,923 INFO L415 sIntCurrentIteration]: We unified 245 AI predicates to 245 [2018-10-27 02:22:31,923 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 02:22:31,923 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 02:22:31,924 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [21] imperfect sequences [6] total 25 [2018-10-27 02:22:31,924 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 02:22:31,924 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-27 02:22:31,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-27 02:22:31,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2018-10-27 02:22:31,925 INFO L87 Difference]: Start difference. First operand 2133 states and 3027 transitions. Second operand 21 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown