java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label37_false-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 11:31:45,129 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 11:31:45,131 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 11:31:45,143 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 11:31:45,143 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 11:31:45,144 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 11:31:45,145 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 11:31:45,147 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 11:31:45,149 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 11:31:45,150 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 11:31:45,151 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 11:31:45,151 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 11:31:45,152 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 11:31:45,153 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 11:31:45,154 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 11:31:45,155 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 11:31:45,156 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 11:31:45,157 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 11:31:45,159 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 11:31:45,161 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 11:31:45,162 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 11:31:45,163 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 11:31:45,166 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 11:31:45,166 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 11:31:45,166 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 11:31:45,167 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 11:31:45,168 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 11:31:45,169 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 11:31:45,170 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 11:31:45,171 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 11:31:45,171 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 11:31:45,172 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-27 11:31:45,172 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 11:31:45,172 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 11:31:45,173 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 11:31:45,174 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 11:31:45,174 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf [2018-10-27 11:31:45,203 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 11:31:45,204 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 11:31:45,204 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 11:31:45,207 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 11:31:45,209 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 11:31:45,209 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 11:31:45,209 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 11:31:45,209 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-27 11:31:45,210 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 11:31:45,210 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 11:31:45,210 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 11:31:45,210 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 11:31:45,211 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 11:31:45,212 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 11:31:45,212 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 11:31:45,212 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 11:31:45,212 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 11:31:45,212 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 11:31:45,213 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 11:31:45,214 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 11:31:45,214 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 11:31:45,214 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 11:31:45,214 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 11:31:45,214 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 11:31:45,215 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 11:31:45,215 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 11:31:45,215 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 11:31:45,215 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 11:31:45,215 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 11:31:45,216 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 11:31:45,216 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 11:31:45,217 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 11:31:45,217 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 11:31:45,217 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 11:31:45,265 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 11:31:45,281 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 11:31:45,285 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 11:31:45,286 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 11:31:45,287 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 11:31:45,288 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label37_false-unreach-call_false-termination.c [2018-10-27 11:31:45,360 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/1681d23d4/49aec85ef67f4a3dadb30bc3f2105ad0/FLAG8c6118f15 [2018-10-27 11:31:46,006 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 11:31:46,007 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label37_false-unreach-call_false-termination.c [2018-10-27 11:31:46,021 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/1681d23d4/49aec85ef67f4a3dadb30bc3f2105ad0/FLAG8c6118f15 [2018-10-27 11:31:46,036 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/1681d23d4/49aec85ef67f4a3dadb30bc3f2105ad0 [2018-10-27 11:31:46,047 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 11:31:46,049 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 11:31:46,050 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 11:31:46,050 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 11:31:46,055 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 11:31:46,056 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:31:46" (1/1) ... [2018-10-27 11:31:46,058 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@aa7dda3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:31:46, skipping insertion in model container [2018-10-27 11:31:46,059 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:31:46" (1/1) ... [2018-10-27 11:31:46,068 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 11:31:46,142 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 11:31:46,655 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 11:31:46,661 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 11:31:46,824 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 11:31:46,842 INFO L193 MainTranslator]: Completed translation [2018-10-27 11:31:46,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:31:46 WrapperNode [2018-10-27 11:31:46,843 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 11:31:46,844 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 11:31:46,844 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 11:31:46,845 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 11:31:46,854 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:31:46" (1/1) ... [2018-10-27 11:31:46,878 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:31:46" (1/1) ... [2018-10-27 11:31:47,078 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 11:31:47,079 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 11:31:47,079 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 11:31:47,079 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 11:31:47,090 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:31:46" (1/1) ... [2018-10-27 11:31:47,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:31:46" (1/1) ... [2018-10-27 11:31:47,104 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:31:46" (1/1) ... [2018-10-27 11:31:47,105 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:31:46" (1/1) ... [2018-10-27 11:31:47,141 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:31:46" (1/1) ... [2018-10-27 11:31:47,154 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:31:46" (1/1) ... [2018-10-27 11:31:47,164 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:31:46" (1/1) ... [2018-10-27 11:31:47,187 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 11:31:47,188 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 11:31:47,188 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 11:31:47,189 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 11:31:47,191 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:31:46" (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 [2018-10-27 11:31:47,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 11:31:47,254 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 11:31:47,254 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-27 11:31:47,255 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-27 11:31:47,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 11:31:47,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 11:31:47,255 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 11:31:47,255 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 11:31:50,916 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 11:31:50,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:31:50 BoogieIcfgContainer [2018-10-27 11:31:50,917 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 11:31:50,918 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 11:31:50,919 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 11:31:50,922 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 11:31:50,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 11:31:46" (1/3) ... [2018-10-27 11:31:50,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22486bb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:31:50, skipping insertion in model container [2018-10-27 11:31:50,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:31:46" (2/3) ... [2018-10-27 11:31:50,924 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22486bb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:31:50, skipping insertion in model container [2018-10-27 11:31:50,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:31:50" (3/3) ... [2018-10-27 11:31:50,926 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label37_false-unreach-call_false-termination.c [2018-10-27 11:31:50,937 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 11:31:50,948 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 11:31:50,966 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 11:31:51,004 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 11:31:51,004 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 11:31:51,004 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 11:31:51,004 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 11:31:51,005 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 11:31:51,005 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 11:31:51,005 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 11:31:51,005 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 11:31:51,033 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-10-27 11:31:51,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-27 11:31:51,040 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 11:31:51,041 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] [2018-10-27 11:31:51,043 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 11:31:51,049 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:31:51,049 INFO L82 PathProgramCache]: Analyzing trace with hash -693884199, now seen corresponding path program 1 times [2018-10-27 11:31:51,051 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 11:31:51,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:31:51,101 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 11:31:51,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:31:51,101 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 11:31:51,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 11:31:51,420 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 11:31:51,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 11:31:51,437 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 11:31:51,437 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 11:31:51,437 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 11:31:51,442 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 11:31:51,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 11:31:51,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 11:31:51,457 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 3 states. [2018-10-27 11:31:53,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 11:31:53,239 INFO L93 Difference]: Finished difference Result 691 states and 1226 transitions. [2018-10-27 11:31:53,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 11:31:53,243 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2018-10-27 11:31:53,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 11:31:53,262 INFO L225 Difference]: With dead ends: 691 [2018-10-27 11:31:53,263 INFO L226 Difference]: Without dead ends: 434 [2018-10-27 11:31:53,272 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 11:31:53,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-10-27 11:31:53,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2018-10-27 11:31:53,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2018-10-27 11:31:53,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 765 transitions. [2018-10-27 11:31:53,364 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 765 transitions. Word has length 25 [2018-10-27 11:31:53,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 11:31:53,364 INFO L481 AbstractCegarLoop]: Abstraction has 434 states and 765 transitions. [2018-10-27 11:31:53,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 11:31:53,365 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 765 transitions. [2018-10-27 11:31:53,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-27 11:31:53,371 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 11:31:53,371 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-27 11:31:53,371 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 11:31:53,372 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:31:53,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1401111305, now seen corresponding path program 1 times [2018-10-27 11:31:53,372 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 11:31:53,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:31:53,374 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 11:31:53,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:31:53,374 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 11:31:53,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 11:31:53,649 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 11:31:53,649 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 11:31:53,650 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 11:31:53,650 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 11:31:53,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 11:31:53,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 11:31:53,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 11:31:53,653 INFO L87 Difference]: Start difference. First operand 434 states and 765 transitions. Second operand 6 states. [2018-10-27 11:31:55,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 11:31:55,741 INFO L93 Difference]: Finished difference Result 1062 states and 1897 transitions. [2018-10-27 11:31:55,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 11:31:55,744 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 100 [2018-10-27 11:31:55,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 11:31:55,750 INFO L225 Difference]: With dead ends: 1062 [2018-10-27 11:31:55,751 INFO L226 Difference]: Without dead ends: 634 [2018-10-27 11:31:55,753 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-27 11:31:55,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2018-10-27 11:31:55,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 625. [2018-10-27 11:31:55,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 625 states. [2018-10-27 11:31:55,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1019 transitions. [2018-10-27 11:31:55,798 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1019 transitions. Word has length 100 [2018-10-27 11:31:55,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 11:31:55,799 INFO L481 AbstractCegarLoop]: Abstraction has 625 states and 1019 transitions. [2018-10-27 11:31:55,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 11:31:55,799 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1019 transitions. [2018-10-27 11:31:55,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-10-27 11:31:55,803 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 11:31:55,804 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-27 11:31:55,804 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 11:31:55,804 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:31:55,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1715582128, now seen corresponding path program 1 times [2018-10-27 11:31:55,805 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 11:31:55,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:31:55,806 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 11:31:55,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:31:55,807 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 11:31:55,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 11:31:55,997 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 11:31:55,998 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 11:31:55,998 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 11:31:55,999 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 11:31:55,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 11:31:56,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 11:31:56,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 11:31:56,002 INFO L87 Difference]: Start difference. First operand 625 states and 1019 transitions. Second operand 4 states. [2018-10-27 11:31:59,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 11:31:59,555 INFO L93 Difference]: Finished difference Result 2350 states and 4011 transitions. [2018-10-27 11:31:59,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 11:31:59,559 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 109 [2018-10-27 11:31:59,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 11:31:59,576 INFO L225 Difference]: With dead ends: 2350 [2018-10-27 11:31:59,577 INFO L226 Difference]: Without dead ends: 1731 [2018-10-27 11:31:59,585 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 11:31:59,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1731 states. [2018-10-27 11:31:59,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1731 to 1731. [2018-10-27 11:31:59,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1731 states. [2018-10-27 11:31:59,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1731 states to 1731 states and 2640 transitions. [2018-10-27 11:31:59,666 INFO L78 Accepts]: Start accepts. Automaton has 1731 states and 2640 transitions. Word has length 109 [2018-10-27 11:31:59,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 11:31:59,667 INFO L481 AbstractCegarLoop]: Abstraction has 1731 states and 2640 transitions. [2018-10-27 11:31:59,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 11:31:59,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1731 states and 2640 transitions. [2018-10-27 11:31:59,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-10-27 11:31:59,690 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 11:31:59,690 INFO L375 BasicCegarLoop]: trace histogram [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, 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] [2018-10-27 11:31:59,690 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 11:31:59,691 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:31:59,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1253393881, now seen corresponding path program 1 times [2018-10-27 11:31:59,691 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 11:31:59,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:31:59,693 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 11:31:59,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:31:59,693 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 11:31:59,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 11:32:00,067 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-10-27 11:32:00,067 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 11:32:00,068 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 11:32:00,068 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 11:32:00,068 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 11:32:00,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 11:32:00,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 11:32:00,069 INFO L87 Difference]: Start difference. First operand 1731 states and 2640 transitions. Second operand 4 states. [2018-10-27 11:32:02,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 11:32:02,394 INFO L93 Difference]: Finished difference Result 6215 states and 9785 transitions. [2018-10-27 11:32:02,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 11:32:02,399 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 219 [2018-10-27 11:32:02,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 11:32:02,437 INFO L225 Difference]: With dead ends: 6215 [2018-10-27 11:32:02,437 INFO L226 Difference]: Without dead ends: 4490 [2018-10-27 11:32:02,465 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 [2018-10-27 11:32:02,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4490 states. [2018-10-27 11:32:02,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4490 to 4490. [2018-10-27 11:32:02,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4490 states. [2018-10-27 11:32:02,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4490 states to 4490 states and 6614 transitions. [2018-10-27 11:32:02,616 INFO L78 Accepts]: Start accepts. Automaton has 4490 states and 6614 transitions. Word has length 219 [2018-10-27 11:32:02,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 11:32:02,617 INFO L481 AbstractCegarLoop]: Abstraction has 4490 states and 6614 transitions. [2018-10-27 11:32:02,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 11:32:02,617 INFO L276 IsEmpty]: Start isEmpty. Operand 4490 states and 6614 transitions. [2018-10-27 11:32:02,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2018-10-27 11:32:02,638 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 11:32:02,638 INFO L375 BasicCegarLoop]: trace histogram [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, 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] [2018-10-27 11:32:02,639 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 11:32:02,639 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:32:02,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1012778421, now seen corresponding path program 1 times [2018-10-27 11:32:02,640 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 11:32:02,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:32:02,641 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 11:32:02,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:32:02,641 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 11:32:02,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 11:32:03,163 WARN L179 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 10 [2018-10-27 11:32:03,551 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 36 proven. 108 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-27 11:32:03,552 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 11:32:03,552 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 11:32:03,554 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 282 with the following transitions: [2018-10-27 11:32:03,556 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [101], [103], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [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], [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], [666], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [786], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-10-27 11:32:03,620 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 11:32:03,620 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 11:32:04,615 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 11:32:14,735 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 11:32:14,738 INFO L272 AbstractInterpreter]: Visited 148 different actions 148 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-10-27 11:32:14,783 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:32:14,784 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 11:32:24,543 INFO L227 lantSequenceWeakener]: Weakened 272 states. On average, predicates are now at 77.38% of their original sizes. [2018-10-27 11:32:24,544 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 11:32:24,712 INFO L415 sIntCurrentIteration]: We unified 280 AI predicates to 280 [2018-10-27 11:32:24,712 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 11:32:24,713 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 11:32:24,713 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2018-10-27 11:32:24,714 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 11:32:24,715 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-27 11:32:24,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-27 11:32:24,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-10-27 11:32:24,715 INFO L87 Difference]: Start difference. First operand 4490 states and 6614 transitions. Second operand 7 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown