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/nested_true-unreach-call1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-3142e50-m [2018-09-11 08:59:54,033 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-11 08:59:54,035 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-11 08:59:54,049 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-11 08:59:54,049 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-11 08:59:54,053 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-11 08:59:54,055 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-11 08:59:54,058 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-11 08:59:54,060 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-11 08:59:54,061 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-11 08:59:54,066 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-11 08:59:54,066 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-11 08:59:54,067 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-11 08:59:54,070 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-11 08:59:54,077 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-11 08:59:54,078 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-11 08:59:54,082 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-11 08:59:54,085 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-11 08:59:54,088 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-11 08:59:54,091 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-11 08:59:54,092 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-11 08:59:54,095 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-11 08:59:54,099 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-11 08:59:54,101 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-11 08:59:54,101 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-11 08:59:54,102 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-11 08:59:54,103 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-11 08:59:54,104 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-11 08:59:54,104 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-11 08:59:54,107 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-11 08:59:54,109 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-11 08:59:54,109 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-11 08:59:54,110 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-11 08:59:54,110 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-11 08:59:54,111 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-11 08:59:54,111 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-11 08:59:54,112 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 08:59:54,127 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-11 08:59:54,127 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-11 08:59:54,128 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-11 08:59:54,128 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-11 08:59:54,128 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-11 08:59:54,128 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-11 08:59:54,129 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-11 08:59:54,129 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-11 08:59:54,129 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-11 08:59:54,129 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-11 08:59:54,129 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-11 08:59:54,130 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-11 08:59:54,130 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-11 08:59:54,131 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-11 08:59:54,131 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-11 08:59:54,131 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-11 08:59:54,131 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-11 08:59:54,132 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-11 08:59:54,132 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-11 08:59:54,132 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-11 08:59:54,132 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-11 08:59:54,132 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-11 08:59:54,133 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-11 08:59:54,133 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-11 08:59:54,133 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-11 08:59:54,133 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-11 08:59:54,133 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-11 08:59:54,134 INFO L133 SettingsManager]: * Trace refinement strategy=TOOTHLESS_TAIPAN [2018-09-11 08:59:54,136 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-11 08:59:54,137 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-11 08:59:54,137 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-11 08:59:54,137 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-11 08:59:54,137 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-11 08:59:54,205 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-11 08:59:54,218 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-11 08:59:54,223 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-11 08:59:54,224 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-11 08:59:54,225 INFO L276 PluginConnector]: CDTParser initialized [2018-09-11 08:59:54,226 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/nested_true-unreach-call1.i [2018-09-11 08:59:54,577 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3323a2cb/0ea13f41170a40c8b5876ec314ecefe8/FLAGb50270d4e [2018-09-11 08:59:54,720 INFO L276 CDTParser]: Found 1 translation units. [2018-09-11 08:59:54,721 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/nested_true-unreach-call1.i [2018-09-11 08:59:54,727 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3323a2cb/0ea13f41170a40c8b5876ec314ecefe8/FLAGb50270d4e [2018-09-11 08:59:54,742 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3323a2cb/0ea13f41170a40c8b5876ec314ecefe8 [2018-09-11 08:59:54,752 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-11 08:59:54,755 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-11 08:59:54,757 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-11 08:59:54,757 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-11 08:59:54,764 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-11 08:59:54,765 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 08:59:54" (1/1) ... [2018-09-11 08:59:54,768 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57449563 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:59:54, skipping insertion in model container [2018-09-11 08:59:54,768 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 08:59:54" (1/1) ... [2018-09-11 08:59:54,949 INFO L180 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-09-11 08:59:54,985 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-11 08:59:55,002 INFO L431 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-11 08:59:55,006 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-11 08:59:55,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:59:55 WrapperNode [2018-09-11 08:59:55,021 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-11 08:59:55,022 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-11 08:59:55,022 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-11 08:59:55,022 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-11 08:59:55,032 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:59:55" (1/1) ... [2018-09-11 08:59:55,039 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:59:55" (1/1) ... [2018-09-11 08:59:55,045 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-11 08:59:55,045 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-11 08:59:55,046 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-11 08:59:55,046 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-11 08:59:55,056 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:59:55" (1/1) ... [2018-09-11 08:59:55,056 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:59:55" (1/1) ... [2018-09-11 08:59:55,057 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:59:55" (1/1) ... [2018-09-11 08:59:55,057 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:59:55" (1/1) ... [2018-09-11 08:59:55,059 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:59:55" (1/1) ... [2018-09-11 08:59:55,071 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:59:55" (1/1) ... [2018-09-11 08:59:55,073 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:59:55" (1/1) ... [2018-09-11 08:59:55,075 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-11 08:59:55,076 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-11 08:59:55,076 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-11 08:59:55,076 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-11 08:59:55,077 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:59:55" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-11 08:59:55,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-11 08:59:55,135 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-11 08:59:55,135 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 08:59:55,135 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 08:59:55,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-11 08:59:55,136 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-11 08:59:55,136 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-11 08:59:55,136 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-11 08:59:55,421 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-11 08:59:55,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 08:59:55 BoogieIcfgContainer [2018-09-11 08:59:55,422 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-11 08:59:55,423 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-11 08:59:55,424 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-11 08:59:55,427 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-11 08:59:55,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 08:59:54" (1/3) ... [2018-09-11 08:59:55,428 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64c7d3a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 08:59:55, skipping insertion in model container [2018-09-11 08:59:55,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:59:55" (2/3) ... [2018-09-11 08:59:55,429 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64c7d3a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 08:59:55, skipping insertion in model container [2018-09-11 08:59:55,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 08:59:55" (3/3) ... [2018-09-11 08:59:55,431 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_true-unreach-call1.i [2018-09-11 08:59:55,449 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-11 08:59:55,459 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-11 08:59:55,531 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-11 08:59:55,531 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-11 08:59:55,532 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-11 08:59:55,532 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-11 08:59:55,532 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-11 08:59:55,532 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-11 08:59:55,532 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-11 08:59:55,533 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-11 08:59:55,533 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-11 08:59:55,571 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2018-09-11 08:59:55,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-11 08:59:55,586 INFO L368 BasicCegarLoop]: Found error trace [2018-09-11 08:59:55,588 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-11 08:59:55,589 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 08:59:55,595 INFO L82 PathProgramCache]: Analyzing trace with hash 41502113, now seen corresponding path program 1 times [2018-09-11 08:59:55,599 INFO L69 tionRefinementEngine]: Using refinement strategy ToothlessTaipanRefinementStrategy [2018-09-11 08:59:55,601 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 11 with the following transitions: [2018-09-11 08:59:55,603 INFO L202 CegarAbsIntRunner]: [0], [1], [4], [6], [15], [41], [45], [46], [47], [49] [2018-09-11 08:59:55,666 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-09-11 08:59:55,667 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-09-11 08:59:55,739 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-09-11 08:59:55,741 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 08:59:55,756 INFO L399 sIntCurrentIteration]: Generating AbsInt predicates [2018-09-11 08:59:55,806 INFO L232 lantSequenceWeakener]: Weakened 1 states. On average, predicates are now at 50% of their original sizes. [2018-09-11 08:59:55,807 INFO L412 sIntCurrentIteration]: Unifying AI predicates [2018-09-11 08:59:55,835 INFO L423 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-09-11 08:59:55,837 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-11 08:59:55,837 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-11 08:59:55,837 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-11 08:59:55,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-11 08:59:55,848 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-11 08:59:55,848 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-11 08:59:55,851 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 3 states. [2018-09-11 08:59:55,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-11 08:59:55,913 INFO L93 Difference]: Finished difference Result 42 states and 55 transitions. [2018-09-11 08:59:55,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-11 08:59:55,915 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-09-11 08:59:55,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-11 08:59:55,923 INFO L225 Difference]: With dead ends: 42 [2018-09-11 08:59:55,923 INFO L226 Difference]: Without dead ends: 20 [2018-09-11 08:59:55,926 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 08:59:55,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-11 08:59:55,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2018-09-11 08:59:55,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-11 08:59:55,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-09-11 08:59:55,964 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 10 [2018-09-11 08:59:55,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-11 08:59:55,965 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-09-11 08:59:55,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-11 08:59:55,965 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-09-11 08:59:55,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-11 08:59:55,966 INFO L368 BasicCegarLoop]: Found error trace [2018-09-11 08:59:55,966 INFO L376 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-11 08:59:55,966 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 08:59:55,967 INFO L82 PathProgramCache]: Analyzing trace with hash 325396729, now seen corresponding path program 1 times [2018-09-11 08:59:55,967 INFO L69 tionRefinementEngine]: Using refinement strategy ToothlessTaipanRefinementStrategy [2018-09-11 08:59:55,967 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 17 with the following transitions: [2018-09-11 08:59:55,968 INFO L202 CegarAbsIntRunner]: [0], [1], [4], [6], [15], [19], [23], [25], [29], [33], [39], [45], [46], [47], [49] [2018-09-11 08:59:55,970 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-09-11 08:59:55,970 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-09-11 08:59:55,996 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-09-11 08:59:56,000 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-09-11 08:59:56,000 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 08:59:56,045 INFO L399 sIntCurrentIteration]: Generating AbsInt predicates [2018-09-11 08:59:56,081 INFO L232 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 50% of their original sizes. [2018-09-11 08:59:56,082 INFO L412 sIntCurrentIteration]: Unifying AI predicates [2018-09-11 08:59:56,140 INFO L423 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-09-11 08:59:56,140 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-11 08:59:56,141 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-11 08:59:56,141 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-11 08:59:56,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-11 08:59:56,142 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-11 08:59:56,142 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-11 08:59:56,143 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 4 states. [2018-09-11 08:59:56,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-11 08:59:56,218 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2018-09-11 08:59:56,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-11 08:59:56,219 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2018-09-11 08:59:56,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-11 08:59:56,220 INFO L225 Difference]: With dead ends: 32 [2018-09-11 08:59:56,220 INFO L226 Difference]: Without dead ends: 22 [2018-09-11 08:59:56,222 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 08:59:56,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-11 08:59:56,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2018-09-11 08:59:56,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-11 08:59:56,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-09-11 08:59:56,228 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2018-09-11 08:59:56,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-11 08:59:56,229 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-09-11 08:59:56,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-11 08:59:56,229 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-09-11 08:59:56,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-11 08:59:56,230 INFO L368 BasicCegarLoop]: Found error trace [2018-09-11 08:59:56,230 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-11 08:59:56,230 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 08:59:56,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1217230829, now seen corresponding path program 1 times [2018-09-11 08:59:56,231 INFO L69 tionRefinementEngine]: Using refinement strategy ToothlessTaipanRefinementStrategy [2018-09-11 08:59:56,231 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 19 with the following transitions: [2018-09-11 08:59:56,232 INFO L202 CegarAbsIntRunner]: [0], [1], [4], [6], [15], [19], [23], [25], [29], [33], [35], [39], [45], [46], [47], [49] [2018-09-11 08:59:56,234 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-09-11 08:59:56,234 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-09-11 08:59:56,240 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