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_INT-OldIcfg.epf -i ../../../trunk/examples/svcomp/loops/string_true-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-3142e50-m [2018-09-11 13:06:06,018 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-11 13:06:06,020 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-11 13:06:06,033 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-11 13:06:06,033 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-11 13:06:06,034 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-11 13:06:06,035 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-11 13:06:06,037 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-11 13:06:06,039 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-11 13:06:06,040 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-11 13:06:06,041 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-11 13:06:06,041 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-11 13:06:06,042 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-11 13:06:06,043 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-11 13:06:06,044 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-11 13:06:06,045 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-11 13:06:06,046 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-11 13:06:06,048 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-11 13:06:06,050 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-11 13:06:06,052 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-11 13:06:06,053 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-11 13:06:06,054 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-11 13:06:06,057 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-11 13:06:06,057 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-11 13:06:06,057 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-11 13:06:06,058 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-11 13:06:06,059 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-11 13:06:06,060 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-11 13:06:06,061 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-11 13:06:06,062 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-11 13:06:06,062 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-11 13:06:06,063 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-11 13:06:06,063 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-11 13:06:06,063 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-11 13:06:06,065 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-11 13:06:06,065 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-11 13:06:06,066 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-ToothlessTaipan_INT-OldIcfg.epf [2018-09-11 13:06:06,097 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-11 13:06:06,097 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-11 13:06:06,100 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-11 13:06:06,101 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-11 13:06:06,101 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-11 13:06:06,101 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-11 13:06:06,101 INFO L133 SettingsManager]: * Congruence Domain=false [2018-09-11 13:06:06,101 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-11 13:06:06,102 INFO L133 SettingsManager]: * Octagon Domain=false [2018-09-11 13:06:06,102 INFO L133 SettingsManager]: * Abstract domain=IntervalDomain [2018-09-11 13:06:06,102 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-11 13:06:06,102 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-11 13:06:06,103 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-11 13:06:06,104 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-11 13:06:06,104 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-11 13:06:06,104 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-11 13:06:06,104 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-11 13:06:06,106 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-11 13:06:06,106 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-11 13:06:06,106 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-11 13:06:06,107 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-11 13:06:06,107 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-11 13:06:06,107 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-11 13:06:06,107 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-11 13:06:06,107 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-11 13:06:06,108 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-11 13:06:06,108 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-11 13:06:06,108 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-11 13:06:06,108 INFO L133 SettingsManager]: * Trace refinement strategy=TOOTHLESS_TAIPAN [2018-09-11 13:06:06,108 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-11 13:06:06,108 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-11 13:06:06,109 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-11 13:06:06,109 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-11 13:06:06,109 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-11 13:06:06,159 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-11 13:06:06,172 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-11 13:06:06,177 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-11 13:06:06,179 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-11 13:06:06,179 INFO L276 PluginConnector]: CDTParser initialized [2018-09-11 13:06:06,180 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/string_true-unreach-call_true-termination.i [2018-09-11 13:06:06,541 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5b4e524b/051a235ca3144b8f8f319bfa370224e6/FLAG9fd81a463 [2018-09-11 13:06:06,721 INFO L276 CDTParser]: Found 1 translation units. [2018-09-11 13:06:06,722 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/string_true-unreach-call_true-termination.i [2018-09-11 13:06:06,733 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5b4e524b/051a235ca3144b8f8f319bfa370224e6/FLAG9fd81a463 [2018-09-11 13:06:06,759 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5b4e524b/051a235ca3144b8f8f319bfa370224e6 [2018-09-11 13:06:06,776 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-11 13:06:06,782 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-11 13:06:06,784 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-11 13:06:06,784 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-11 13:06:06,794 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-11 13:06:06,795 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 01:06:06" (1/1) ... [2018-09-11 13:06:06,799 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59dda83d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 01:06:06, skipping insertion in model container [2018-09-11 13:06:06,799 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 01:06:06" (1/1) ... [2018-09-11 13:06:06,985 INFO L180 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-09-11 13:06:07,039 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-11 13:06:07,058 INFO L431 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-11 13:06:07,069 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-11 13:06:07,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 01:06:07 WrapperNode [2018-09-11 13:06:07,083 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-11 13:06:07,084 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-11 13:06:07,084 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-11 13:06:07,084 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-11 13:06:07,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 01:06:07" (1/1) ... [2018-09-11 13:06:07,099 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 01:06:07" (1/1) ... [2018-09-11 13:06:07,105 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-11 13:06:07,105 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-11 13:06:07,105 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-11 13:06:07,105 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-11 13:06:07,113 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 01:06:07" (1/1) ... [2018-09-11 13:06:07,113 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 01:06:07" (1/1) ... [2018-09-11 13:06:07,115 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 01:06:07" (1/1) ... [2018-09-11 13:06:07,115 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 01:06:07" (1/1) ... [2018-09-11 13:06:07,118 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 01:06:07" (1/1) ... [2018-09-11 13:06:07,125 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 01:06:07" (1/1) ... [2018-09-11 13:06:07,127 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 01:06:07" (1/1) ... [2018-09-11 13:06:07,129 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-11 13:06:07,129 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-11 13:06:07,129 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-11 13:06:07,129 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-11 13:06:07,130 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 01:06:07" (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 13:06:07,194 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_string_true_unreach_call_true_termination_i____VERIFIER_assert [2018-09-11 13:06:07,195 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_string_true_unreach_call_true_termination_i____VERIFIER_assert [2018-09-11 13:06:07,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-11 13:06:07,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-11 13:06:07,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-11 13:06:07,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-11 13:06:07,196 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-11 13:06:07,196 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-11 13:06:07,896 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-11 13:06:07,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 01:06:07 BoogieIcfgContainer [2018-09-11 13:06:07,897 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-11 13:06:07,898 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-11 13:06:07,899 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-11 13:06:07,902 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-11 13:06:07,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 01:06:06" (1/3) ... [2018-09-11 13:06:07,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38079869 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 01:06:07, skipping insertion in model container [2018-09-11 13:06:07,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 01:06:07" (2/3) ... [2018-09-11 13:06:07,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38079869 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 01:06:07, skipping insertion in model container [2018-09-11 13:06:07,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 01:06:07" (3/3) ... [2018-09-11 13:06:07,907 INFO L112 eAbstractionObserver]: Analyzing ICFG string_true-unreach-call_true-termination.i [2018-09-11 13:06:07,918 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-11 13:06:07,927 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-11 13:06:07,972 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-11 13:06:07,973 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-11 13:06:07,973 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-11 13:06:07,973 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-11 13:06:07,973 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-11 13:06:07,973 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-11 13:06:07,974 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-11 13:06:07,974 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-11 13:06:07,974 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-11 13:06:07,992 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2018-09-11 13:06:07,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-11 13:06:07,999 INFO L368 BasicCegarLoop]: Found error trace [2018-09-11 13:06:08,000 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-11 13:06:08,001 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_string_true_unreach_call_true_termination_i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-11 13:06:08,006 INFO L82 PathProgramCache]: Analyzing trace with hash -908502541, now seen corresponding path program 1 times [2018-09-11 13:06:08,008 INFO L69 tionRefinementEngine]: Using refinement strategy ToothlessTaipanRefinementStrategy [2018-09-11 13:06:08,009 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 20 with the following transitions: [2018-09-11 13:06:08,012 INFO L202 CegarAbsIntRunner]: [0], [3], [5], [11], [15], [28], [33], [46], [51], [63], [65], [77], [82], [100], [102], [106], [107], [108], [110] [2018-09-11 13:06:08,044 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2018-09-11 13:06:08,044 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2018-09-11 13:06:08,095 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-09-11 13:06:08,097 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Never found a fixpoint. Largest state had 7 variables. [2018-09-11 13:06:08,110 INFO L399 sIntCurrentIteration]: Generating AbsInt predicates [2018-09-11 13:06:08,154 INFO L232 lantSequenceWeakener]: Weakened 1 states. On average, predicates are now at 100% of their original sizes. [2018-09-11 13:06:08,154 INFO L412 sIntCurrentIteration]: Unifying AI predicates [2018-09-11 13:06:08,157 INFO L423 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-09-11 13:06:08,158 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-11 13:06:08,158 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-11 13:06:08,159 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-11 13:06:08,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-09-11 13:06:08,170 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-09-11 13:06:08,170 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-09-11 13:06:08,173 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 2 states. [2018-09-11 13:06:08,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-11 13:06:08,196 INFO L93 Difference]: Finished difference Result 62 states and 89 transitions. [2018-09-11 13:06:08,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-09-11 13:06:08,198 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2018-09-11 13:06:08,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-11 13:06:08,205 INFO L225 Difference]: With dead ends: 62 [2018-09-11 13:06:08,205 INFO L226 Difference]: Without dead ends: 28 [2018-09-11 13:06:08,209 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-09-11 13:06:08,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-11 13:06:08,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-11 13:06:08,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-11 13:06:08,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2018-09-11 13:06:08,250 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 19 [2018-09-11 13:06:08,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-11 13:06:08,250 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2018-09-11 13:06:08,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-09-11 13:06:08,250 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2018-09-11 13:06:08,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-11 13:06:08,252 INFO L368 BasicCegarLoop]: Found error trace [2018-09-11 13:06:08,252 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-11 13:06:08,252 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_string_true_unreach_call_true_termination_i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-11 13:06:08,253 INFO L82 PathProgramCache]: Analyzing trace with hash -137090617, now seen corresponding path program 1 times [2018-09-11 13:06:08,253 INFO L69 tionRefinementEngine]: Using refinement strategy ToothlessTaipanRefinementStrategy [2018-09-11 13:06:08,253 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 25 with the following transitions: [2018-09-11 13:06:08,254 INFO L202 CegarAbsIntRunner]: [0], [3], [5], [11], [15], [19], [22], [33], [37], [40], [51], [55], [59], [65], [69], [73], [82], [86], [90], [102], [106], [107], [108], [110] [2018-09-11 13:06:08,256 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2018-09-11 13:06:08,256 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2018-09-11 13:06:08,276 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-09-11 13:06:08,276 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Never found a fixpoint. Largest state had 7 variables. [2018-09-11 13:06:08,291 INFO L399 sIntCurrentIteration]: Generating AbsInt predicates [2018-09-11 13:06:08,303 INFO L232 lantSequenceWeakener]: Weakened 2 states. On average, predicates are now at 50% of their original sizes. [2018-09-11 13:06:08,303 INFO L412 sIntCurrentIteration]: Unifying AI predicates [2018-09-11 13:06:08,318 INFO L423 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-09-11 13:06:08,319 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-11 13:06:08,319 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-11 13:06:08,319 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-11 13:06:08,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-11 13:06:08,321 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-11 13:06:08,321 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-11 13:06:08,321 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 3 states. [2018-09-11 13:06:08,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-11 13:06:08,410 INFO L93 Difference]: Finished difference Result 59 states and 72 transitions. [2018-09-11 13:06:08,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-11 13:06:08,411 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2018-09-11 13:06:08,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-11 13:06:08,415 INFO L225 Difference]: With dead ends: 59 [2018-09-11 13:06:08,415 INFO L226 Difference]: Without dead ends: 39 [2018-09-11 13:06:08,416 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 23 GetRequests, 22 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 13:06:08,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-11 13:06:08,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2018-09-11 13:06:08,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-11 13:06:08,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2018-09-11 13:06:08,425 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 24 [2018-09-11 13:06:08,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-11 13:06:08,425 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2018-09-11 13:06:08,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-11 13:06:08,426 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2018-09-11 13:06:08,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-11 13:06:08,427 INFO L368 BasicCegarLoop]: Found error trace [2018-09-11 13:06:08,427 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-11 13:06:08,427 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_string_true_unreach_call_true_termination_i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-11 13:06:08,428 INFO L82 PathProgramCache]: Analyzing trace with hash 276365447, now seen corresponding path program 1 times [2018-09-11 13:06:08,428 INFO L69 tionRefinementEngine]: Using refinement strategy ToothlessTaipanRefinementStrategy [2018-09-11 13:06:08,428 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 31 with the following transitions: [2018-09-11 13:06:08,428 INFO L202 CegarAbsIntRunner]: [0], [3], [5], [11], [15], [19], [22], [24], [26], [33], [37], [40], [42], [44], [51], [55], [59], [65], [69], [73], [82], [86], [90], [102], [106], [107], [108], [110] [2018-09-11 13:06:08,431 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2018-09-11 13:06:08,431 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown