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_INT-OldIcfg.epf -i ../../../trunk/examples/svcomp/loop-invgen/nest-if3_true-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-3142e50-m [2018-09-11 13:26:11,261 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-11 13:26:11,264 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-11 13:26:11,281 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-11 13:26:11,281 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-11 13:26:11,282 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-11 13:26:11,283 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-11 13:26:11,285 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-11 13:26:11,287 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-11 13:26:11,288 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-11 13:26:11,289 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-11 13:26:11,289 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-11 13:26:11,290 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-11 13:26:11,291 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-11 13:26:11,292 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-11 13:26:11,294 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-11 13:26:11,296 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-11 13:26:11,298 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-11 13:26:11,305 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-11 13:26:11,310 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-11 13:26:11,311 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-11 13:26:11,312 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-11 13:26:11,317 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-11 13:26:11,318 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-11 13:26:11,318 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-11 13:26:11,319 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-11 13:26:11,321 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-11 13:26:11,322 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-11 13:26:11,323 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-11 13:26:11,324 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-11 13:26:11,324 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-11 13:26:11,327 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-11 13:26:11,327 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-11 13:26:11,327 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-11 13:26:11,330 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-11 13:26:11,331 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-11 13:26:11,331 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-ToothlessTaipan_INT-OldIcfg.epf [2018-09-11 13:26:11,346 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-11 13:26:11,346 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-11 13:26:11,347 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-11 13:26:11,347 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-11 13:26:11,347 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-11 13:26:11,347 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-11 13:26:11,347 INFO L133 SettingsManager]: * Congruence Domain=false [2018-09-11 13:26:11,348 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-11 13:26:11,348 INFO L133 SettingsManager]: * Octagon Domain=false [2018-09-11 13:26:11,348 INFO L133 SettingsManager]: * Abstract domain=IntervalDomain [2018-09-11 13:26:11,348 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-11 13:26:11,348 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-11 13:26:11,349 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-11 13:26:11,349 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-11 13:26:11,349 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-11 13:26:11,350 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-11 13:26:11,350 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-11 13:26:11,350 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-11 13:26:11,350 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-11 13:26:11,350 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-11 13:26:11,351 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-11 13:26:11,351 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-11 13:26:11,351 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-11 13:26:11,351 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-11 13:26:11,351 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-11 13:26:11,352 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-11 13:26:11,352 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-11 13:26:11,352 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-11 13:26:11,352 INFO L133 SettingsManager]: * Trace refinement strategy=TOOTHLESS_TAIPAN [2018-09-11 13:26:11,352 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-11 13:26:11,353 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-11 13:26:11,353 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-11 13:26:11,353 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-11 13:26:11,353 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-11 13:26:11,421 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-11 13:26:11,440 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-11 13:26:11,447 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-11 13:26:11,448 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-11 13:26:11,449 INFO L276 PluginConnector]: CDTParser initialized [2018-09-11 13:26:11,449 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/nest-if3_true-unreach-call_true-termination.i [2018-09-11 13:26:11,790 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d9bfe3f7/63f39ac14194406dbf071f9cf462c656/FLAGa99a670cc [2018-09-11 13:26:11,945 INFO L276 CDTParser]: Found 1 translation units. [2018-09-11 13:26:11,946 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/nest-if3_true-unreach-call_true-termination.i [2018-09-11 13:26:11,953 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d9bfe3f7/63f39ac14194406dbf071f9cf462c656/FLAGa99a670cc [2018-09-11 13:26:11,978 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d9bfe3f7/63f39ac14194406dbf071f9cf462c656 [2018-09-11 13:26:11,992 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-11 13:26:11,998 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-11 13:26:12,000 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-11 13:26:12,000 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-11 13:26:12,011 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-11 13:26:12,012 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 01:26:11" (1/1) ... [2018-09-11 13:26:12,017 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1eacf37e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 01:26:12, skipping insertion in model container [2018-09-11 13:26:12,017 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 01:26:11" (1/1) ... [2018-09-11 13:26:12,230 INFO L180 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-09-11 13:26:12,269 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-11 13:26:12,286 INFO L431 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-11 13:26:12,292 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-11 13:26:12,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 01:26:12 WrapperNode [2018-09-11 13:26:12,306 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-11 13:26:12,307 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-11 13:26:12,307 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-11 13:26:12,308 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-11 13:26:12,318 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 01:26:12" (1/1) ... [2018-09-11 13:26:12,325 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 01:26:12" (1/1) ... [2018-09-11 13:26:12,331 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-11 13:26:12,332 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-11 13:26:12,332 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-11 13:26:12,332 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-11 13:26:12,342 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 01:26:12" (1/1) ... [2018-09-11 13:26:12,343 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 01:26:12" (1/1) ... [2018-09-11 13:26:12,344 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 01:26:12" (1/1) ... [2018-09-11 13:26:12,344 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 01:26:12" (1/1) ... [2018-09-11 13:26:12,346 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 01:26:12" (1/1) ... [2018-09-11 13:26:12,352 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 01:26:12" (1/1) ... [2018-09-11 13:26:12,353 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 01:26:12" (1/1) ... [2018-09-11 13:26:12,355 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-11 13:26:12,356 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-11 13:26:12,356 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-11 13:26:12,356 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-11 13:26:12,357 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 01:26:12" (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 13:26:12,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-11 13:26:12,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-11 13:26:12,434 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_invgen_nest_if__true_unreach_call_true_termination_i____VERIFIER_assert [2018-09-11 13:26:12,434 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_invgen_nest_if__true_unreach_call_true_termination_i____VERIFIER_assert [2018-09-11 13:26:12,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-11 13:26:12,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-11 13:26:12,435 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-11 13:26:12,435 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-11 13:26:12,919 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-11 13:26:12,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 01:26:12 BoogieIcfgContainer [2018-09-11 13:26:12,920 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-11 13:26:12,921 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-11 13:26:12,921 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-11 13:26:12,924 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-11 13:26:12,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 01:26:11" (1/3) ... [2018-09-11 13:26:12,926 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b44d7c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 01:26:12, skipping insertion in model container [2018-09-11 13:26:12,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 01:26:12" (2/3) ... [2018-09-11 13:26:12,926 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b44d7c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 01:26:12, skipping insertion in model container [2018-09-11 13:26:12,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 01:26:12" (3/3) ... [2018-09-11 13:26:12,928 INFO L112 eAbstractionObserver]: Analyzing ICFG nest-if3_true-unreach-call_true-termination.i [2018-09-11 13:26:12,938 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-11 13:26:12,946 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-11 13:26:12,997 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-11 13:26:12,998 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-11 13:26:12,998 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-11 13:26:12,999 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-11 13:26:12,999 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-11 13:26:12,999 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-11 13:26:12,999 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-11 13:26:13,000 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-11 13:26:13,000 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-11 13:26:13,020 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2018-09-11 13:26:13,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-11 13:26:13,027 INFO L368 BasicCegarLoop]: Found error trace [2018-09-11 13:26:13,028 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-11 13:26:13,029 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_invgen_nest_if__true_unreach_call_true_termination_i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-11 13:26:13,035 INFO L82 PathProgramCache]: Analyzing trace with hash -303319981, now seen corresponding path program 1 times [2018-09-11 13:26:13,038 INFO L69 tionRefinementEngine]: Using refinement strategy ToothlessTaipanRefinementStrategy [2018-09-11 13:26:13,039 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 17 with the following transitions: [2018-09-11 13:26:13,041 INFO L202 CegarAbsIntRunner]: [0], [1], [4], [6], [15], [19], [23], [27], [31], [36], [40], [45], [64], [65], [66], [68] [2018-09-11 13:26:13,079 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2018-09-11 13:26:13,079 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown