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_OCT-OldIcfg.epf -i ../../../trunk/examples/svcomp/loop-acceleration/overflow_true-unreach-call1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-3142e50-m [2018-09-11 19:35:20,071 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-11 19:35:20,073 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-11 19:35:20,101 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-11 19:35:20,102 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-11 19:35:20,105 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-11 19:35:20,106 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-11 19:35:20,109 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-11 19:35:20,112 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-11 19:35:20,115 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-11 19:35:20,116 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-11 19:35:20,116 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-11 19:35:20,120 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-11 19:35:20,122 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-11 19:35:20,123 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-11 19:35:20,126 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-11 19:35:20,127 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-11 19:35:20,130 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-11 19:35:20,134 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-11 19:35:20,136 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-11 19:35:20,137 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-11 19:35:20,141 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-11 19:35:20,144 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-11 19:35:20,144 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-11 19:35:20,144 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-11 19:35:20,145 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-11 19:35:20,147 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-11 19:35:20,148 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-11 19:35:20,148 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-11 19:35:20,149 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-11 19:35:20,150 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-11 19:35:20,154 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-11 19:35:20,154 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-11 19:35:20,154 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-11 19:35:20,156 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-11 19:35:20,157 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-11 19:35:20,157 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-ToothlessTaipan_OCT-OldIcfg.epf [2018-09-11 19:35:20,181 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-11 19:35:20,181 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-11 19:35:20,182 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-11 19:35:20,183 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-11 19:35:20,183 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-11 19:35:20,183 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-11 19:35:20,183 INFO L133 SettingsManager]: * Congruence Domain=false [2018-09-11 19:35:20,184 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-11 19:35:20,184 INFO L133 SettingsManager]: * Abstract domain=OctagonDomain [2018-09-11 19:35:20,184 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-11 19:35:20,184 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-11 19:35:20,184 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-11 19:35:20,185 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-11 19:35:20,185 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-11 19:35:20,185 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-11 19:35:20,186 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-11 19:35:20,186 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-11 19:35:20,186 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-11 19:35:20,186 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-11 19:35:20,186 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-11 19:35:20,187 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-11 19:35:20,187 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-11 19:35:20,187 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-11 19:35:20,187 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-11 19:35:20,188 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-11 19:35:20,188 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-11 19:35:20,188 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-11 19:35:20,188 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-11 19:35:20,188 INFO L133 SettingsManager]: * Trace refinement strategy=TOOTHLESS_TAIPAN [2018-09-11 19:35:20,189 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-11 19:35:20,189 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-11 19:35:20,189 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-11 19:35:20,189 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-11 19:35:20,189 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-11 19:35:20,262 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-11 19:35:20,278 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-11 19:35:20,284 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-11 19:35:20,287 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-11 19:35:20,287 INFO L276 PluginConnector]: CDTParser initialized [2018-09-11 19:35:20,288 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/overflow_true-unreach-call1.i [2018-09-11 19:35:20,634 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9aeae054/175bc33b3e884629b0325fc594b2e569/FLAGaf3c6509b [2018-09-11 19:35:20,760 INFO L276 CDTParser]: Found 1 translation units. [2018-09-11 19:35:20,761 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/overflow_true-unreach-call1.i [2018-09-11 19:35:20,768 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9aeae054/175bc33b3e884629b0325fc594b2e569/FLAGaf3c6509b [2018-09-11 19:35:20,785 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9aeae054/175bc33b3e884629b0325fc594b2e569 [2018-09-11 19:35:20,801 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-11 19:35:20,805 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-11 19:35:20,806 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-11 19:35:20,806 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-11 19:35:20,813 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-11 19:35:20,814 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 07:35:20" (1/1) ... [2018-09-11 19:35:20,818 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f5721ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:35:20, skipping insertion in model container [2018-09-11 19:35:20,818 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 07:35:20" (1/1) ... [2018-09-11 19:35:21,003 INFO L180 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-09-11 19:35:21,041 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-11 19:35:21,061 INFO L431 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-11 19:35:21,065 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-11 19:35:21,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:35:21 WrapperNode [2018-09-11 19:35:21,080 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-11 19:35:21,082 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-11 19:35:21,082 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-11 19:35:21,082 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-11 19:35:21,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:35:21" (1/1) ... [2018-09-11 19:35:21,097 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:35:21" (1/1) ... [2018-09-11 19:35:21,102 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-11 19:35:21,103 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-11 19:35:21,103 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-11 19:35:21,103 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-11 19:35:21,111 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:35:21" (1/1) ... [2018-09-11 19:35:21,111 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:35:21" (1/1) ... [2018-09-11 19:35:21,112 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:35:21" (1/1) ... [2018-09-11 19:35:21,112 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:35:21" (1/1) ... [2018-09-11 19:35:21,113 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:35:21" (1/1) ... [2018-09-11 19:35:21,122 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:35:21" (1/1) ... [2018-09-11 19:35:21,123 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:35:21" (1/1) ... [2018-09-11 19:35:21,124 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-11 19:35:21,125 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-11 19:35:21,125 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-11 19:35:21,125 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-11 19:35:21,126 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:35:21" (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 19:35:21,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-11 19:35:21,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-11 19:35:21,190 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_acceleration_overflow_true_unreach_call__i____VERIFIER_assert [2018-09-11 19:35:21,190 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_acceleration_overflow_true_unreach_call__i____VERIFIER_assert [2018-09-11 19:35:21,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-11 19:35:21,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-11 19:35:21,191 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-11 19:35:21,191 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-11 19:35:21,438 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-11 19:35:21,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 07:35:21 BoogieIcfgContainer [2018-09-11 19:35:21,439 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-11 19:35:21,440 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-11 19:35:21,440 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-11 19:35:21,444 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-11 19:35:21,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 07:35:20" (1/3) ... [2018-09-11 19:35:21,445 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b229f1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 07:35:21, skipping insertion in model container [2018-09-11 19:35:21,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:35:21" (2/3) ... [2018-09-11 19:35:21,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b229f1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 07:35:21, skipping insertion in model container [2018-09-11 19:35:21,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 07:35:21" (3/3) ... [2018-09-11 19:35:21,448 INFO L112 eAbstractionObserver]: Analyzing ICFG overflow_true-unreach-call1.i [2018-09-11 19:35:21,458 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-11 19:35:21,466 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-11 19:35:21,517 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-11 19:35:21,517 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-11 19:35:21,517 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-11 19:35:21,518 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-11 19:35:21,518 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-11 19:35:21,518 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-11 19:35:21,518 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-11 19:35:21,518 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-11 19:35:21,518 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-11 19:35:21,536 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2018-09-11 19:35:21,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-11 19:35:21,542 INFO L368 BasicCegarLoop]: Found error trace [2018-09-11 19:35:21,543 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-11 19:35:21,544 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_acceleration_overflow_true_unreach_call__i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-11 19:35:21,550 INFO L82 PathProgramCache]: Analyzing trace with hash 314686959, now seen corresponding path program 1 times [2018-09-11 19:35:21,552 INFO L69 tionRefinementEngine]: Using refinement strategy ToothlessTaipanRefinementStrategy [2018-09-11 19:35:21,554 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 11 with the following transitions: [2018-09-11 19:35:21,556 INFO L202 CegarAbsIntRunner]: [0], [1], [4], [6], [15], [27], [31], [32], [33], [35] [2018-09-11 19:35:21,610 INFO L148 AbstractInterpreter]: Using domain OctagonDomain [2018-09-11 19:35:21,610 INFO L101 FixpointEngine]: Starting fixpoint engine with domain OctagonDomain (maxUnwinding=3, maxParallelStates=2) [2018-09-11 19:35:21,648 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-09-11 19:35:21,649 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 19:35:21,683 INFO L399 sIntCurrentIteration]: Generating AbsInt predicates [2018-09-11 19:35:21,728 INFO L224 lantSequenceWeakener]: Could never weaken! [2018-09-11 19:35:21,729 INFO L412 sIntCurrentIteration]: Unifying AI predicates [2018-09-11 19:35:21,751 INFO L423 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-09-11 19:35:21,753 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-11 19:35:21,753 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-11 19:35:21,754 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-11 19:35:21,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-11 19:35:21,767 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-11 19:35:21,768 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-11 19:35:21,771 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 3 states. [2018-09-11 19:35:21,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-11 19:35:21,873 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2018-09-11 19:35:21,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-11 19:35:21,876 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-09-11 19:35:21,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-11 19:35:21,885 INFO L225 Difference]: With dead ends: 31 [2018-09-11 19:35:21,886 INFO L226 Difference]: Without dead ends: 14 [2018-09-11 19:35:21,890 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 19:35:21,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-11 19:35:21,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-11 19:35:21,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-11 19:35:21,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-11 19:35:21,933 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 10 [2018-09-11 19:35:21,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-11 19:35:21,934 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-11 19:35:21,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-11 19:35:21,934 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-11 19:35:21,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-11 19:35:21,935 INFO L368 BasicCegarLoop]: Found error trace [2018-09-11 19:35:21,935 INFO L376 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-11 19:35:21,936 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_acceleration_overflow_true_unreach_call__i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-11 19:35:21,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1883357962, now seen corresponding path program 1 times [2018-09-11 19:35:21,936 INFO L69 tionRefinementEngine]: Using refinement strategy ToothlessTaipanRefinementStrategy [2018-09-11 19:35:21,937 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 14 with the following transitions: [2018-09-11 19:35:21,937 INFO L202 CegarAbsIntRunner]: [0], [1], [4], [6], [15], [19], [23], [25], [31], [32], [33], [35] [2018-09-11 19:35:21,943 INFO L148 AbstractInterpreter]: Using domain OctagonDomain [2018-09-11 19:35:21,943 INFO L101 FixpointEngine]: Starting fixpoint engine with domain OctagonDomain (maxUnwinding=3, maxParallelStates=2) [2018-09-11 19:35:21,979 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