java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-ToothlessTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/loops/nec40_true-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-3142e50-m [2018-09-11 08:54:51,025 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-11 08:54:51,027 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-11 08:54:51,043 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-11 08:54:51,043 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-11 08:54:51,044 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-11 08:54:51,046 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-11 08:54:51,048 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-11 08:54:51,049 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-11 08:54:51,050 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-11 08:54:51,051 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-11 08:54:51,052 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-11 08:54:51,053 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-11 08:54:51,054 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-11 08:54:51,055 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-11 08:54:51,056 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-11 08:54:51,056 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-11 08:54:51,062 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-11 08:54:51,066 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-11 08:54:51,068 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-11 08:54:51,073 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-11 08:54:51,076 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-11 08:54:51,079 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-11 08:54:51,083 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-11 08:54:51,083 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-11 08:54:51,084 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-11 08:54:51,088 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-11 08:54:51,089 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-11 08:54:51,092 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-11 08:54:51,093 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-11 08:54:51,094 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-11 08:54:51,094 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-11 08:54:51,094 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-11 08:54:51,095 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-11 08:54:51,097 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-11 08:54:51,098 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-11 08:54:51,098 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-ToothlessTaipan_Default-OldIcfg.epf [2018-09-11 08:54:51,132 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-11 08:54:51,132 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-11 08:54:51,133 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-11 08:54:51,133 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-11 08:54:51,134 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-11 08:54:51,134 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-11 08:54:51,134 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-11 08:54:51,134 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-11 08:54:51,135 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-11 08:54:51,135 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-11 08:54:51,135 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-11 08:54:51,136 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-11 08:54:51,136 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-11 08:54:51,136 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-11 08:54:51,136 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-11 08:54:51,138 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-11 08:54:51,138 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-11 08:54:51,138 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-11 08:54:51,138 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-11 08:54:51,140 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-11 08:54:51,140 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-11 08:54:51,140 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-11 08:54:51,140 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-11 08:54:51,141 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-11 08:54:51,141 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-11 08:54:51,141 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-11 08:54:51,141 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-11 08:54:51,142 INFO L133 SettingsManager]: * Trace refinement strategy=TOOTHLESS_TAIPAN [2018-09-11 08:54:51,142 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-11 08:54:51,142 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-11 08:54:51,142 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-11 08:54:51,142 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-11 08:54:51,143 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-11 08:54:51,215 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-11 08:54:51,232 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-11 08:54:51,240 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-11 08:54:51,242 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-11 08:54:51,242 INFO L276 PluginConnector]: CDTParser initialized [2018-09-11 08:54:51,243 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/nec40_true-unreach-call_true-termination.i [2018-09-11 08:54:51,609 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e9778523/e42f25777b44469486dfbb8f0b9e7163/FLAGd21f32313 [2018-09-11 08:54:51,818 INFO L276 CDTParser]: Found 1 translation units. [2018-09-11 08:54:51,818 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/nec40_true-unreach-call_true-termination.i [2018-09-11 08:54:51,826 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e9778523/e42f25777b44469486dfbb8f0b9e7163/FLAGd21f32313 [2018-09-11 08:54:51,843 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e9778523/e42f25777b44469486dfbb8f0b9e7163 [2018-09-11 08:54:51,854 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-11 08:54:51,857 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-11 08:54:51,858 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-11 08:54:51,859 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-11 08:54:51,866 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-11 08:54:51,867 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 08:54:51" (1/1) ... [2018-09-11 08:54:51,870 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@170fd945 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:54:51, skipping insertion in model container [2018-09-11 08:54:51,870 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 08:54:51" (1/1) ... [2018-09-11 08:54:52,052 INFO L180 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-09-11 08:54:52,109 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-11 08:54:52,156 INFO L431 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-11 08:54:52,162 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-11 08:54:52,196 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:54:52 WrapperNode [2018-09-11 08:54:52,196 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-11 08:54:52,198 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-11 08:54:52,198 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-11 08:54:52,198 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-11 08:54:52,209 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:54:52" (1/1) ... [2018-09-11 08:54:52,221 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:54:52" (1/1) ... [2018-09-11 08:54:52,229 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-11 08:54:52,229 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-11 08:54:52,230 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-11 08:54:52,230 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-11 08:54:52,241 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:54:52" (1/1) ... [2018-09-11 08:54:52,241 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:54:52" (1/1) ... [2018-09-11 08:54:52,244 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:54:52" (1/1) ... [2018-09-11 08:54:52,245 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:54:52" (1/1) ... [2018-09-11 08:54:52,259 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:54:52" (1/1) ... [2018-09-11 08:54:52,279 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:54:52" (1/1) ... [2018-09-11 08:54:52,288 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:54:52" (1/1) ... [2018-09-11 08:54:52,291 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-11 08:54:52,292 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-11 08:54:52,292 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-11 08:54:52,292 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-11 08:54:52,299 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:54:52" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-11 08:54:52,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-11 08:54:52,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-11 08:54:52,387 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_nec___true_unreach_call_true_termination_i____VERIFIER_assert [2018-09-11 08:54:52,387 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_nec___true_unreach_call_true_termination_i____VERIFIER_assert [2018-09-11 08:54:52,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-11 08:54:52,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-11 08:54:52,388 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-11 08:54:52,388 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-11 08:54:53,215 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-11 08:54:53,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 08:54:53 BoogieIcfgContainer [2018-09-11 08:54:53,218 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-11 08:54:53,219 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-11 08:54:53,219 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-11 08:54:53,224 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-11 08:54:53,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 08:54:51" (1/3) ... [2018-09-11 08:54:53,225 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76d447fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 08:54:53, skipping insertion in model container [2018-09-11 08:54:53,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:54:52" (2/3) ... [2018-09-11 08:54:53,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76d447fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 08:54:53, skipping insertion in model container [2018-09-11 08:54:53,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 08:54:53" (3/3) ... [2018-09-11 08:54:53,229 INFO L112 eAbstractionObserver]: Analyzing ICFG nec40_true-unreach-call_true-termination.i [2018-09-11 08:54:53,244 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-11 08:54:53,255 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-11 08:54:53,318 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-11 08:54:53,319 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-11 08:54:53,319 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-11 08:54:53,320 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-11 08:54:53,320 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-11 08:54:53,320 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-11 08:54:53,321 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-11 08:54:53,321 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-11 08:54:53,321 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-11 08:54:53,341 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2018-09-11 08:54:53,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-11 08:54:53,348 INFO L368 BasicCegarLoop]: Found error trace [2018-09-11 08:54:53,349 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-11 08:54:53,350 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_nec___true_unreach_call_true_termination_i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-11 08:54:53,356 INFO L82 PathProgramCache]: Analyzing trace with hash 695081176, now seen corresponding path program 1 times [2018-09-11 08:54:53,359 INFO L69 tionRefinementEngine]: Using refinement strategy ToothlessTaipanRefinementStrategy [2018-09-11 08:54:53,360 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 15 with the following transitions: [2018-09-11 08:54:53,366 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [7], [16], [28], [30], [33], [36], [46], [47], [48], [50] [2018-09-11 08:54:53,446 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-09-11 08:54:53,447 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-09-11 08:54:53,580 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-09-11 08:54:53,582 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Never found a fixpoint. Largest state had 11 variables. [2018-09-11 08:54:53,601 INFO L399 sIntCurrentIteration]: Generating AbsInt predicates [2018-09-11 08:54:53,720 INFO L232 lantSequenceWeakener]: Weakened 6 states. On average, predicates are now at 94.44% of their original sizes. [2018-09-11 08:54:53,721 INFO L412 sIntCurrentIteration]: Unifying AI predicates [2018-09-11 08:54:53,767 INFO L423 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-09-11 08:54:53,769 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-11 08:54:53,769 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-11 08:54:53,769 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-11 08:54:53,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-11 08:54:53,782 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-11 08:54:53,783 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-11 08:54:53,786 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2018-09-11 08:54:54,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-11 08:54:54,026 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2018-09-11 08:54:54,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-11 08:54:54,028 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2018-09-11 08:54:54,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-11 08:54:54,038 INFO L225 Difference]: With dead ends: 47 [2018-09-11 08:54:54,039 INFO L226 Difference]: Without dead ends: 18 [2018-09-11 08:54:54,045 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-11 08:54:54,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-11 08:54:54,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-11 08:54:54,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-11 08:54:54,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-11 08:54:54,088 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 14 [2018-09-11 08:54:54,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-11 08:54:54,088 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-11 08:54:54,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-11 08:54:54,089 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-11 08:54:54,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-11 08:54:54,089 INFO L368 BasicCegarLoop]: Found error trace [2018-09-11 08:54:54,090 INFO L376 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-11 08:54:54,090 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_nec___true_unreach_call_true_termination_i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-11 08:54:54,090 INFO L82 PathProgramCache]: Analyzing trace with hash 2038171400, now seen corresponding path program 1 times [2018-09-11 08:54:54,091 INFO L69 tionRefinementEngine]: Using refinement strategy ToothlessTaipanRefinementStrategy [2018-09-11 08:54:54,091 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 18 with the following transitions: [2018-09-11 08:54:54,091 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [7], [16], [20], [24], [26], [30], [33], [36], [46], [47], [48], [50] [2018-09-11 08:54:54,098 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-09-11 08:54:54,098 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown