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/nested_true-unreach-call1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-3142e50-m [2018-09-11 23:54:04,840 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-11 23:54:04,842 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-11 23:54:04,856 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-11 23:54:04,856 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-11 23:54:04,858 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-11 23:54:04,859 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-11 23:54:04,861 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-11 23:54:04,863 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-11 23:54:04,864 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-11 23:54:04,865 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-11 23:54:04,865 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-11 23:54:04,866 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-11 23:54:04,867 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-11 23:54:04,868 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-11 23:54:04,869 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-11 23:54:04,870 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-11 23:54:04,872 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-11 23:54:04,875 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-11 23:54:04,876 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-11 23:54:04,878 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-11 23:54:04,879 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-11 23:54:04,882 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-11 23:54:04,882 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-11 23:54:04,882 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-11 23:54:04,883 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-11 23:54:04,885 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-11 23:54:04,886 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-11 23:54:04,887 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-11 23:54:04,888 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-11 23:54:04,888 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-11 23:54:04,889 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-11 23:54:04,890 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-11 23:54:04,890 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-11 23:54:04,891 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-11 23:54:04,892 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-11 23:54:04,892 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 23:54:04,909 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-11 23:54:04,910 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-11 23:54:04,911 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-11 23:54:04,911 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-11 23:54:04,911 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-11 23:54:04,911 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-11 23:54:04,912 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-11 23:54:04,912 INFO L133 SettingsManager]: * Octagon Domain=false [2018-09-11 23:54:04,912 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-11 23:54:04,912 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-11 23:54:04,912 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-11 23:54:04,913 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-11 23:54:04,913 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-11 23:54:04,914 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-11 23:54:04,914 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-11 23:54:04,914 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-11 23:54:04,914 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-11 23:54:04,914 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-11 23:54:04,915 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-11 23:54:04,915 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-11 23:54:04,915 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-11 23:54:04,915 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-11 23:54:04,916 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-11 23:54:04,916 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-11 23:54:04,916 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-11 23:54:04,916 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-11 23:54:04,916 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-11 23:54:04,917 INFO L133 SettingsManager]: * Trace refinement strategy=TOOTHLESS_TAIPAN [2018-09-11 23:54:04,917 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-11 23:54:04,917 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-11 23:54:04,917 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-11 23:54:04,917 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-11 23:54:04,917 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-11 23:54:04,964 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-11 23:54:04,987 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-11 23:54:04,995 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-11 23:54:04,997 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-11 23:54:04,998 INFO L276 PluginConnector]: CDTParser initialized [2018-09-11 23:54:04,999 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/nested_true-unreach-call1.i [2018-09-11 23:54:05,376 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19a7c03f5/4bc88d9da4984051806119b1141f4077/FLAGabfd9b1c1 [2018-09-11 23:54:05,581 INFO L276 CDTParser]: Found 1 translation units. [2018-09-11 23:54:05,587 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/nested_true-unreach-call1.i [2018-09-11 23:54:05,598 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19a7c03f5/4bc88d9da4984051806119b1141f4077/FLAGabfd9b1c1 [2018-09-11 23:54:05,616 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19a7c03f5/4bc88d9da4984051806119b1141f4077 [2018-09-11 23:54:05,628 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-11 23:54:05,631 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-11 23:54:05,633 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-11 23:54:05,633 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-11 23:54:05,642 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-11 23:54:05,644 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 11:54:05" (1/1) ... [2018-09-11 23:54:05,648 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76a7336e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:54:05, skipping insertion in model container [2018-09-11 23:54:05,648 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 11:54:05" (1/1) ... [2018-09-11 23:54:05,865 INFO L180 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-09-11 23:54:05,920 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-11 23:54:05,943 INFO L431 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-11 23:54:05,949 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-11 23:54:05,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:54:05 WrapperNode [2018-09-11 23:54:05,966 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-11 23:54:05,967 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-11 23:54:05,967 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-11 23:54:05,968 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-11 23:54:05,978 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:54:05" (1/1) ... [2018-09-11 23:54:05,985 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:54:05" (1/1) ... [2018-09-11 23:54:05,992 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-11 23:54:05,993 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-11 23:54:05,993 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-11 23:54:05,994 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-11 23:54:06,005 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:54:05" (1/1) ... [2018-09-11 23:54:06,006 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:54:05" (1/1) ... [2018-09-11 23:54:06,007 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:54:05" (1/1) ... [2018-09-11 23:54:06,007 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:54:05" (1/1) ... [2018-09-11 23:54:06,009 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:54:05" (1/1) ... [2018-09-11 23:54:06,020 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:54:05" (1/1) ... [2018-09-11 23:54:06,023 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:54:05" (1/1) ... [2018-09-11 23:54:06,030 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-11 23:54:06,031 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-11 23:54:06,031 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-11 23:54:06,032 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-11 23:54:06,033 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:54:05" (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 23:54:06,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-11 23:54:06,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-11 23:54:06,119 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_acceleration_nested_true_unreach_call__i____VERIFIER_assert [2018-09-11 23:54:06,119 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_acceleration_nested_true_unreach_call__i____VERIFIER_assert [2018-09-11 23:54:06,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-11 23:54:06,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-11 23:54:06,119 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-11 23:54:06,120 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-11 23:54:06,470 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-11 23:54:06,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 11:54:06 BoogieIcfgContainer [2018-09-11 23:54:06,472 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-11 23:54:06,473 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-11 23:54:06,473 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-11 23:54:06,476 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-11 23:54:06,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 11:54:05" (1/3) ... [2018-09-11 23:54:06,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e3f723 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 11:54:06, skipping insertion in model container [2018-09-11 23:54:06,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:54:05" (2/3) ... [2018-09-11 23:54:06,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e3f723 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 11:54:06, skipping insertion in model container [2018-09-11 23:54:06,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 11:54:06" (3/3) ... [2018-09-11 23:54:06,480 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_true-unreach-call1.i [2018-09-11 23:54:06,492 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-11 23:54:06,502 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-11 23:54:06,592 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-11 23:54:06,593 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-11 23:54:06,593 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-11 23:54:06,594 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-11 23:54:06,594 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-11 23:54:06,594 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-11 23:54:06,594 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-11 23:54:06,595 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-11 23:54:06,595 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-11 23:54:06,630 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2018-09-11 23:54:06,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-11 23:54:06,641 INFO L368 BasicCegarLoop]: Found error trace [2018-09-11 23:54:06,642 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-11 23:54:06,650 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_acceleration_nested_true_unreach_call__i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-11 23:54:06,662 INFO L82 PathProgramCache]: Analyzing trace with hash 41502113, now seen corresponding path program 1 times [2018-09-11 23:54:06,669 INFO L69 tionRefinementEngine]: Using refinement strategy ToothlessTaipanRefinementStrategy [2018-09-11 23:54:06,673 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 11 with the following transitions: [2018-09-11 23:54:06,681 INFO L202 CegarAbsIntRunner]: [0], [1], [4], [6], [15], [41], [45], [46], [47], [49] [2018-09-11 23:54:06,718 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-09-11 23:54:06,718 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-09-11 23:54:06,799 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-09-11 23:54:06,801 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Never found a fixpoint. Largest state had 2 variables. [2018-09-11 23:54:06,844 INFO L399 sIntCurrentIteration]: Generating AbsInt predicates [2018-09-11 23:54:06,896 INFO L232 lantSequenceWeakener]: Weakened 1 states. On average, predicates are now at 50% of their original sizes. [2018-09-11 23:54:06,897 INFO L412 sIntCurrentIteration]: Unifying AI predicates [2018-09-11 23:54:06,928 INFO L423 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-09-11 23:54:06,929 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-11 23:54:06,930 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-11 23:54:06,930 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-11 23:54:06,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-11 23:54:06,945 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-11 23:54:06,946 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-11 23:54:06,949 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 3 states. [2018-09-11 23:54:07,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-11 23:54:07,021 INFO L93 Difference]: Finished difference Result 42 states and 55 transitions. [2018-09-11 23:54:07,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-11 23:54:07,023 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-09-11 23:54:07,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-11 23:54:07,032 INFO L225 Difference]: With dead ends: 42 [2018-09-11 23:54:07,032 INFO L226 Difference]: Without dead ends: 20 [2018-09-11 23:54:07,037 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 9 GetRequests, 8 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 23:54:07,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-11 23:54:07,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2018-09-11 23:54:07,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-11 23:54:07,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-09-11 23:54:07,075 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 10 [2018-09-11 23:54:07,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-11 23:54:07,076 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-09-11 23:54:07,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-11 23:54:07,076 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-09-11 23:54:07,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-11 23:54:07,077 INFO L368 BasicCegarLoop]: Found error trace [2018-09-11 23:54:07,077 INFO L376 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-11 23:54:07,078 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_acceleration_nested_true_unreach_call__i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-11 23:54:07,078 INFO L82 PathProgramCache]: Analyzing trace with hash 325396729, now seen corresponding path program 1 times [2018-09-11 23:54:07,079 INFO L69 tionRefinementEngine]: Using refinement strategy ToothlessTaipanRefinementStrategy [2018-09-11 23:54:07,079 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 17 with the following transitions: [2018-09-11 23:54:07,079 INFO L202 CegarAbsIntRunner]: [0], [1], [4], [6], [15], [19], [23], [25], [29], [33], [39], [45], [46], [47], [49] [2018-09-11 23:54:07,081 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-09-11 23:54:07,081 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-09-11 23:54:07,098 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-09-11 23:54:07,102 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-09-11 23:54:07,105 INFO L272 AbstractInterpreter]: Visited 10 different actions 10 times. Never merged. Never widened. Never found a fixpoint. Largest state had 3 variables. [2018-09-11 23:54:07,151 INFO L399 sIntCurrentIteration]: Generating AbsInt predicates [2018-09-11 23:54:07,185 INFO L232 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 50% of their original sizes. [2018-09-11 23:54:07,185 INFO L412 sIntCurrentIteration]: Unifying AI predicates [2018-09-11 23:54:07,211 INFO L423 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-09-11 23:54:07,212 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-11 23:54:07,212 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-11 23:54:07,212 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-11 23:54:07,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-11 23:54:07,213 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-11 23:54:07,214 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-11 23:54:07,214 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 4 states. [2018-09-11 23:54:07,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-11 23:54:07,281 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2018-09-11 23:54:07,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-11 23:54:07,283 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2018-09-11 23:54:07,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-11 23:54:07,284 INFO L225 Difference]: With dead ends: 32 [2018-09-11 23:54:07,284 INFO L226 Difference]: Without dead ends: 22 [2018-09-11 23:54:07,286 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 15 GetRequests, 13 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 23:54:07,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-11 23:54:07,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2018-09-11 23:54:07,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-11 23:54:07,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-09-11 23:54:07,292 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2018-09-11 23:54:07,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-11 23:54:07,292 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-09-11 23:54:07,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-11 23:54:07,293 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-09-11 23:54:07,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-11 23:54:07,293 INFO L368 BasicCegarLoop]: Found error trace [2018-09-11 23:54:07,294 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-11 23:54:07,294 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_acceleration_nested_true_unreach_call__i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-11 23:54:07,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1217230829, now seen corresponding path program 1 times [2018-09-11 23:54:07,295 INFO L69 tionRefinementEngine]: Using refinement strategy ToothlessTaipanRefinementStrategy [2018-09-11 23:54:07,295 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 19 with the following transitions: [2018-09-11 23:54:07,295 INFO L202 CegarAbsIntRunner]: [0], [1], [4], [6], [15], [19], [23], [25], [29], [33], [35], [39], [45], [46], [47], [49] [2018-09-11 23:54:07,297 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-09-11 23:54:07,298 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-09-11 23:54:07,302 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