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/loop-acceleration/phases_true-unreach-call1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-3142e50-m [2018-09-11 08:59:58,942 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-11 08:59:58,944 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-11 08:59:58,957 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-11 08:59:58,958 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-11 08:59:58,959 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-11 08:59:58,960 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-11 08:59:58,962 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-11 08:59:58,964 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-11 08:59:58,965 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-11 08:59:58,966 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-11 08:59:58,966 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-11 08:59:58,967 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-11 08:59:58,968 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-11 08:59:58,969 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-11 08:59:58,970 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-11 08:59:58,971 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-11 08:59:58,973 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-11 08:59:58,976 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-11 08:59:58,978 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-11 08:59:58,979 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-11 08:59:58,980 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-11 08:59:58,983 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-11 08:59:58,984 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-11 08:59:58,984 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-11 08:59:58,985 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-11 08:59:58,987 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-11 08:59:58,988 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-11 08:59:58,989 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-11 08:59:58,990 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-11 08:59:58,991 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-11 08:59:58,991 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-11 08:59:58,992 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-11 08:59:58,992 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-11 08:59:58,993 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-11 08:59:58,994 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-11 08:59:58,995 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 08:59:59,011 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-11 08:59:59,012 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-11 08:59:59,012 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-11 08:59:59,013 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-11 08:59:59,013 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-11 08:59:59,013 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-11 08:59:59,013 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-11 08:59:59,014 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-11 08:59:59,014 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-11 08:59:59,014 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-11 08:59:59,014 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-11 08:59:59,015 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-11 08:59:59,015 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-11 08:59:59,015 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-11 08:59:59,015 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-11 08:59:59,016 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-11 08:59:59,016 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-11 08:59:59,016 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-11 08:59:59,016 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-11 08:59:59,017 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-11 08:59:59,017 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-11 08:59:59,017 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-11 08:59:59,017 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-11 08:59:59,017 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-11 08:59:59,018 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-11 08:59:59,018 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-11 08:59:59,018 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-11 08:59:59,018 INFO L133 SettingsManager]: * Trace refinement strategy=TOOTHLESS_TAIPAN [2018-09-11 08:59:59,018 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-11 08:59:59,018 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-11 08:59:59,019 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-11 08:59:59,019 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-11 08:59:59,019 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-11 08:59:59,066 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-11 08:59:59,083 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-11 08:59:59,090 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-11 08:59:59,091 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-11 08:59:59,092 INFO L276 PluginConnector]: CDTParser initialized [2018-09-11 08:59:59,093 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/phases_true-unreach-call1.i [2018-09-11 08:59:59,493 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad8005794/afeb3915c10d4d4e9cdf5d813b574e99/FLAG8b89c51ac [2018-09-11 08:59:59,647 INFO L276 CDTParser]: Found 1 translation units. [2018-09-11 08:59:59,648 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/phases_true-unreach-call1.i [2018-09-11 08:59:59,654 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad8005794/afeb3915c10d4d4e9cdf5d813b574e99/FLAG8b89c51ac [2018-09-11 08:59:59,672 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad8005794/afeb3915c10d4d4e9cdf5d813b574e99 [2018-09-11 08:59:59,684 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-11 08:59:59,690 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-11 08:59:59,691 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-11 08:59:59,693 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-11 08:59:59,702 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-11 08:59:59,704 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 08:59:59" (1/1) ... [2018-09-11 08:59:59,707 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e571bde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:59:59, skipping insertion in model container [2018-09-11 08:59:59,708 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 08:59:59" (1/1) ... [2018-09-11 08:59:59,896 INFO L180 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-09-11 08:59:59,941 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-11 08:59:59,960 INFO L431 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-11 08:59:59,965 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-11 08:59:59,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:59:59 WrapperNode [2018-09-11 08:59:59,977 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-11 08:59:59,978 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-11 08:59:59,978 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-11 08:59:59,978 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-11 08:59:59,988 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:59:59" (1/1) ... [2018-09-11 08:59:59,995 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:59:59" (1/1) ... [2018-09-11 09:00:00,002 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-11 09:00:00,002 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-11 09:00:00,002 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-11 09:00:00,002 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-11 09:00:00,012 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:59:59" (1/1) ... [2018-09-11 09:00:00,013 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:59:59" (1/1) ... [2018-09-11 09:00:00,013 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:59:59" (1/1) ... [2018-09-11 09:00:00,014 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:59:59" (1/1) ... [2018-09-11 09:00:00,015 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:59:59" (1/1) ... [2018-09-11 09:00:00,023 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:59:59" (1/1) ... [2018-09-11 09:00:00,024 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:59:59" (1/1) ... [2018-09-11 09:00:00,031 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-11 09:00:00,032 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-11 09:00:00,032 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-11 09:00:00,032 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-11 09:00:00,034 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:59:59" (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 09:00:00,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-11 09:00:00,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-11 09:00:00,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-11 09:00:00,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-11 09:00:00,092 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-11 09:00:00,092 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-11 09:00:00,093 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_acceleration_phases_true_unreach_call__i____VERIFIER_assert [2018-09-11 09:00:00,093 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_acceleration_phases_true_unreach_call__i____VERIFIER_assert [2018-09-11 09:00:00,374 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-11 09:00:00,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 09:00:00 BoogieIcfgContainer [2018-09-11 09:00:00,375 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-11 09:00:00,376 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-11 09:00:00,376 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-11 09:00:00,380 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-11 09:00:00,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 08:59:59" (1/3) ... [2018-09-11 09:00:00,381 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27d6c095 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 09:00:00, skipping insertion in model container [2018-09-11 09:00:00,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:59:59" (2/3) ... [2018-09-11 09:00:00,381 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27d6c095 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 09:00:00, skipping insertion in model container [2018-09-11 09:00:00,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 09:00:00" (3/3) ... [2018-09-11 09:00:00,383 INFO L112 eAbstractionObserver]: Analyzing ICFG phases_true-unreach-call1.i [2018-09-11 09:00:00,393 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-11 09:00:00,402 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-11 09:00:00,448 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-11 09:00:00,448 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-11 09:00:00,449 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-11 09:00:00,449 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-11 09:00:00,449 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-11 09:00:00,449 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-11 09:00:00,449 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-11 09:00:00,449 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-11 09:00:00,449 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-11 09:00:00,472 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2018-09-11 09:00:00,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-11 09:00:00,479 INFO L368 BasicCegarLoop]: Found error trace [2018-09-11 09:00:00,480 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-11 09:00:00,481 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_acceleration_phases_true_unreach_call__i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-11 09:00:00,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1713253442, now seen corresponding path program 1 times [2018-09-11 09:00:00,488 INFO L69 tionRefinementEngine]: Using refinement strategy ToothlessTaipanRefinementStrategy [2018-09-11 09:00:00,489 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 11 with the following transitions: [2018-09-11 09:00:00,491 INFO L202 CegarAbsIntRunner]: [0], [4], [22], [26], [29], [31], [37], [38], [39], [41] [2018-09-11 09:00:00,558 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-09-11 09:00:00,559 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-09-11 09:00:00,629 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-09-11 09:00:00,630 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Never found a fixpoint. Largest state had 1 variables. [2018-09-11 09:00:00,645 INFO L399 sIntCurrentIteration]: Generating AbsInt predicates [2018-09-11 09:00:00,691 INFO L224 lantSequenceWeakener]: Could never weaken! [2018-09-11 09:00:00,691 INFO L412 sIntCurrentIteration]: Unifying AI predicates [2018-09-11 09:00:00,724 INFO L423 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-09-11 09:00:00,726 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-11 09:00:00,726 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-11 09:00:00,727 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-11 09:00:00,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-11 09:00:00,738 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-11 09:00:00,739 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-11 09:00:00,741 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2018-09-11 09:00:00,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-11 09:00:00,850 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2018-09-11 09:00:00,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-11 09:00:00,853 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-09-11 09:00:00,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-11 09:00:00,869 INFO L225 Difference]: With dead ends: 36 [2018-09-11 09:00:00,870 INFO L226 Difference]: Without dead ends: 16 [2018-09-11 09:00:00,875 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 09:00:00,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-11 09:00:00,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-11 09:00:00,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-11 09:00:00,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2018-09-11 09:00:00,927 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 10 [2018-09-11 09:00:00,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-11 09:00:00,927 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2018-09-11 09:00:00,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-11 09:00:00,928 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2018-09-11 09:00:00,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-11 09:00:00,929 INFO L368 BasicCegarLoop]: Found error trace [2018-09-11 09:00:00,929 INFO L376 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-11 09:00:00,929 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_acceleration_phases_true_unreach_call__i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-11 09:00:00,930 INFO L82 PathProgramCache]: Analyzing trace with hash -2056921797, now seen corresponding path program 1 times [2018-09-11 09:00:00,930 INFO L69 tionRefinementEngine]: Using refinement strategy ToothlessTaipanRefinementStrategy [2018-09-11 09:00:00,930 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 15 with the following transitions: [2018-09-11 09:00:00,931 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [14], [17], [26], [29], [31], [37], [38], [39], [41] [2018-09-11 09:00:00,933 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-09-11 09:00:00,934 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-09-11 09:00:00,963 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