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_INTCON-OldIcfg.epf -i ../../../trunk/examples/svcomp/loop-acceleration/phases_true-unreach-call2_false-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-3142e50-m [2018-09-11 23:58:58,456 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-11 23:58:58,458 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-11 23:58:58,470 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-11 23:58:58,471 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-11 23:58:58,472 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-11 23:58:58,473 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-11 23:58:58,475 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-11 23:58:58,477 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-11 23:58:58,477 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-11 23:58:58,478 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-11 23:58:58,479 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-11 23:58:58,480 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-11 23:58:58,481 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-11 23:58:58,482 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-11 23:58:58,483 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-11 23:58:58,483 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-11 23:58:58,485 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-11 23:58:58,488 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-11 23:58:58,489 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-11 23:58:58,490 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-11 23:58:58,491 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-11 23:58:58,494 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-11 23:58:58,494 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-11 23:58:58,494 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-11 23:58:58,495 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-11 23:58:58,496 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-11 23:58:58,497 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-11 23:58:58,498 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-11 23:58:58,499 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-11 23:58:58,499 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-11 23:58:58,500 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-11 23:58:58,500 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-11 23:58:58,501 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-11 23:58:58,502 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-11 23:58:58,503 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-11 23:58:58,503 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-ToothlessTaipan_INTCON-OldIcfg.epf [2018-09-11 23:58:58,531 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-11 23:58:58,531 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-11 23:58:58,533 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-11 23:58:58,533 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-11 23:58:58,533 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-11 23:58:58,533 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-11 23:58:58,533 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-11 23:58:58,534 INFO L133 SettingsManager]: * Octagon Domain=false [2018-09-11 23:58:58,534 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-11 23:58:58,534 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-11 23:58:58,534 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-11 23:58:58,535 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-11 23:58:58,535 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-11 23:58:58,536 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-11 23:58:58,536 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-11 23:58:58,536 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-11 23:58:58,537 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-11 23:58:58,537 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-11 23:58:58,537 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-11 23:58:58,537 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-11 23:58:58,537 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-11 23:58:58,538 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-11 23:58:58,538 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-11 23:58:58,538 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-11 23:58:58,538 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-11 23:58:58,539 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-11 23:58:58,540 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-11 23:58:58,540 INFO L133 SettingsManager]: * Trace refinement strategy=TOOTHLESS_TAIPAN [2018-09-11 23:58:58,540 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-11 23:58:58,540 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-11 23:58:58,541 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-11 23:58:58,541 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-11 23:58:58,541 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-11 23:58:58,597 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-11 23:58:58,610 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-11 23:58:58,616 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-11 23:58:58,618 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-11 23:58:58,618 INFO L276 PluginConnector]: CDTParser initialized [2018-09-11 23:58:58,619 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/phases_true-unreach-call2_false-termination.i [2018-09-11 23:58:58,959 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da5eb40b0/6c160afd8fa0410daa39c519a945cbf8/FLAGffdbf0769 [2018-09-11 23:58:59,169 INFO L276 CDTParser]: Found 1 translation units. [2018-09-11 23:58:59,170 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/phases_true-unreach-call2_false-termination.i [2018-09-11 23:58:59,178 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da5eb40b0/6c160afd8fa0410daa39c519a945cbf8/FLAGffdbf0769 [2018-09-11 23:58:59,204 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da5eb40b0/6c160afd8fa0410daa39c519a945cbf8 [2018-09-11 23:58:59,218 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-11 23:58:59,224 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-11 23:58:59,225 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-11 23:58:59,225 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-11 23:58:59,234 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-11 23:58:59,235 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 11:58:59" (1/1) ... [2018-09-11 23:58:59,238 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f00c975 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:58:59, skipping insertion in model container [2018-09-11 23:58:59,238 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 11:58:59" (1/1) ... [2018-09-11 23:58:59,421 INFO L180 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-09-11 23:58:59,454 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-11 23:58:59,471 INFO L431 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-11 23:58:59,476 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-11 23:58:59,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:58:59 WrapperNode [2018-09-11 23:58:59,489 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-11 23:58:59,490 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-11 23:58:59,490 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-11 23:58:59,491 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-11 23:58:59,500 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:58:59" (1/1) ... [2018-09-11 23:58:59,506 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:58:59" (1/1) ... [2018-09-11 23:58:59,512 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-11 23:58:59,512 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-11 23:58:59,512 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-11 23:58:59,512 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-11 23:58:59,522 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:58:59" (1/1) ... [2018-09-11 23:58:59,522 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:58:59" (1/1) ... [2018-09-11 23:58:59,523 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:58:59" (1/1) ... [2018-09-11 23:58:59,523 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:58:59" (1/1) ... [2018-09-11 23:58:59,525 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:58:59" (1/1) ... [2018-09-11 23:58:59,531 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:58:59" (1/1) ... [2018-09-11 23:58:59,532 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:58:59" (1/1) ... [2018-09-11 23:58:59,533 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-11 23:58:59,534 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-11 23:58:59,534 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-11 23:58:59,534 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-11 23:58:59,535 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:58:59" (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 23:58:59,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-11 23:58:59,601 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-11 23:58:59,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-11 23:58:59,601 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-11 23:58:59,601 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-11 23:58:59,602 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-11 23:58:59,602 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_acceleration_phases_true_unreach_call__false_termination_i____VERIFIER_assert [2018-09-11 23:58:59,602 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_acceleration_phases_true_unreach_call__false_termination_i____VERIFIER_assert [2018-09-11 23:58:59,870 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-11 23:58:59,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 11:58:59 BoogieIcfgContainer [2018-09-11 23:58:59,871 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-11 23:58:59,872 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-11 23:58:59,873 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-11 23:58:59,884 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-11 23:58:59,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 11:58:59" (1/3) ... [2018-09-11 23:58:59,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@691be09e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 11:58:59, skipping insertion in model container [2018-09-11 23:58:59,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:58:59" (2/3) ... [2018-09-11 23:58:59,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@691be09e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 11:58:59, skipping insertion in model container [2018-09-11 23:58:59,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 11:58:59" (3/3) ... [2018-09-11 23:58:59,896 INFO L112 eAbstractionObserver]: Analyzing ICFG phases_true-unreach-call2_false-termination.i [2018-09-11 23:58:59,919 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-11 23:58:59,929 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-11 23:59:00,012 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-11 23:59:00,013 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-11 23:59:00,013 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-11 23:59:00,013 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-11 23:59:00,013 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-11 23:59:00,014 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-11 23:59:00,014 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-11 23:59:00,014 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-11 23:59:00,014 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-11 23:59:00,032 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-09-11 23:59:00,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-11 23:59:00,039 INFO L368 BasicCegarLoop]: Found error trace [2018-09-11 23:59:00,040 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-11 23:59:00,041 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_acceleration_phases_true_unreach_call__false_termination_i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-11 23:59:00,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1994259344, now seen corresponding path program 1 times [2018-09-11 23:59:00,050 INFO L69 tionRefinementEngine]: Using refinement strategy ToothlessTaipanRefinementStrategy [2018-09-11 23:59:00,051 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 12 with the following transitions: [2018-09-11 23:59:00,053 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [26], [30], [33], [35], [41], [42], [43], [45] [2018-09-11 23:59:00,089 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-09-11 23:59:00,089 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-09-11 23:59:00,166 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-09-11 23:59:00,169 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-09-11 23:59:00,170 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Never found a fixpoint. Largest state had 3 variables. [2018-09-11 23:59:00,203 INFO L399 sIntCurrentIteration]: Generating AbsInt predicates [2018-09-11 23:59:00,246 INFO L224 lantSequenceWeakener]: Could never weaken! [2018-09-11 23:59:00,247 INFO L412 sIntCurrentIteration]: Unifying AI predicates [2018-09-11 23:59:00,276 INFO L423 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-09-11 23:59:00,278 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-11 23:59:00,278 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-11 23:59:00,278 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-11 23:59:00,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-11 23:59:00,294 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-11 23:59:00,295 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-11 23:59:00,298 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 4 states. [2018-09-11 23:59:00,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-11 23:59:00,421 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2018-09-11 23:59:00,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-11 23:59:00,423 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2018-09-11 23:59:00,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-11 23:59:00,431 INFO L225 Difference]: With dead ends: 39 [2018-09-11 23:59:00,432 INFO L226 Difference]: Without dead ends: 18 [2018-09-11 23:59:00,436 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-11 23:59:00,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-11 23:59:00,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 14. [2018-09-11 23:59:00,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-11 23:59:00,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-09-11 23:59:00,474 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2018-09-11 23:59:00,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-11 23:59:00,475 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-09-11 23:59:00,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-11 23:59:00,475 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-09-11 23:59:00,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-11 23:59:00,476 INFO L368 BasicCegarLoop]: Found error trace [2018-09-11 23:59:00,476 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-11 23:59:00,477 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_acceleration_phases_true_unreach_call__false_termination_i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-11 23:59:00,477 INFO L82 PathProgramCache]: Analyzing trace with hash -2119643788, now seen corresponding path program 1 times [2018-09-11 23:59:00,477 INFO L69 tionRefinementEngine]: Using refinement strategy ToothlessTaipanRefinementStrategy [2018-09-11 23:59:00,478 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 13 with the following transitions: [2018-09-11 23:59:00,478 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [16], [30], [33], [35], [41], [42], [43], [45] [2018-09-11 23:59:00,480 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-09-11 23:59:00,480 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-09-11 23:59:00,483 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown