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-invgen/sendmail-close-angle_true-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-69f5bdd-m [2018-09-19 08:01:30,930 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-19 08:01:30,935 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-19 08:01:30,956 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-19 08:01:30,957 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-19 08:01:30,958 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-19 08:01:30,962 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-19 08:01:30,965 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-19 08:01:30,967 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-19 08:01:30,968 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-19 08:01:30,970 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-19 08:01:30,970 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-19 08:01:30,971 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-19 08:01:30,972 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-19 08:01:30,973 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-19 08:01:30,974 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-19 08:01:30,975 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-19 08:01:30,977 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-19 08:01:30,979 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-19 08:01:30,981 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-19 08:01:30,982 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-19 08:01:30,984 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-19 08:01:30,986 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-19 08:01:30,996 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 [2018-09-19 08:01:31,030 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-19 08:01:31,032 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-19 08:01:31,032 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-19 08:01:31,033 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-19 08:01:31,033 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-19 08:01:31,033 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-19 08:01:31,034 INFO L133 SettingsManager]: * Congruence Domain=false [2018-09-19 08:01:31,034 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-19 08:01:31,034 INFO L133 SettingsManager]: * Abstract domain=OctagonDomain [2018-09-19 08:01:31,034 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-19 08:01:31,035 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-19 08:01:31,035 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-09-19 08:01:31,035 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-19 08:01:31,036 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-19 08:01:31,036 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-19 08:01:31,036 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-19 08:01:31,037 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-19 08:01:31,037 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-19 08:01:31,037 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-19 08:01:31,038 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-19 08:01:31,038 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-19 08:01:31,038 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-19 08:01:31,038 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-19 08:01:31,039 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-19 08:01:31,039 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-19 08:01:31,039 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-19 08:01:31,039 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-19 08:01:31,040 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-19 08:01:31,040 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-19 08:01:31,040 INFO L133 SettingsManager]: * Trace refinement strategy=TOOTHLESS_TAIPAN [2018-09-19 08:01:31,041 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-19 08:01:31,041 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-19 08:01:31,041 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-19 08:01:31,041 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-19 08:01:31,041 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-19 08:01:31,117 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-19 08:01:31,134 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-19 08:01:31,140 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-19 08:01:31,142 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-19 08:01:31,142 INFO L276 PluginConnector]: CDTParser initialized [2018-09-19 08:01:31,143 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/sendmail-close-angle_true-unreach-call_true-termination.i [2018-09-19 08:01:31,512 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d30b705e8/7ca226330f154bb788c3da61f662a911/FLAG064dd3c22 [2018-09-19 08:01:31,665 INFO L277 CDTParser]: Found 1 translation units. [2018-09-19 08:01:31,665 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/sendmail-close-angle_true-unreach-call_true-termination.i [2018-09-19 08:01:31,672 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d30b705e8/7ca226330f154bb788c3da61f662a911/FLAG064dd3c22 [2018-09-19 08:01:31,687 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d30b705e8/7ca226330f154bb788c3da61f662a911 [2018-09-19 08:01:31,697 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-19 08:01:31,699 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-19 08:01:31,701 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-19 08:01:31,701 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-19 08:01:31,707 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-19 08:01:31,709 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.09 08:01:31" (1/1) ... [2018-09-19 08:01:31,712 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@289161a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.09 08:01:31, skipping insertion in model container [2018-09-19 08:01:31,712 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.09 08:01:31" (1/1) ... [2018-09-19 08:01:31,723 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-19 08:01:31,912 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-19 08:01:31,935 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-19 08:01:31,947 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-19 08:01:31,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.09 08:01:31 WrapperNode [2018-09-19 08:01:31,966 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-19 08:01:31,967 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-19 08:01:31,967 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-19 08:01:31,967 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-19 08:01:31,977 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.09 08:01:31" (1/1) ... [2018-09-19 08:01:31,984 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.09 08:01:31" (1/1) ... [2018-09-19 08:01:31,990 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-19 08:01:31,991 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-19 08:01:31,991 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-19 08:01:31,991 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-19 08:01:32,001 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.09 08:01:31" (1/1) ... [2018-09-19 08:01:32,002 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.09 08:01:31" (1/1) ... [2018-09-19 08:01:32,003 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.09 08:01:31" (1/1) ... [2018-09-19 08:01:32,003 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.09 08:01:31" (1/1) ... [2018-09-19 08:01:32,005 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.09 08:01:31" (1/1) ... [2018-09-19 08:01:32,011 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.09 08:01:31" (1/1) ... [2018-09-19 08:01:32,012 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.09 08:01:31" (1/1) ... [2018-09-19 08:01:32,014 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-19 08:01:32,015 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-19 08:01:32,015 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-19 08:01:32,015 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-19 08:01:32,016 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.09 08:01:31" (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 [2018-09-19 08:01:32,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-19 08:01:32,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-19 08:01:32,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-19 08:01:32,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-19 08:01:32,092 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-19 08:01:32,092 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-19 08:01:32,093 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-09-19 08:01:32,093 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-09-19 08:01:32,574 INFO L356 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-19 08:01:32,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.09 08:01:32 BoogieIcfgContainer [2018-09-19 08:01:32,575 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-19 08:01:32,576 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-19 08:01:32,576 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-19 08:01:32,581 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-19 08:01:32,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.09 08:01:31" (1/3) ... [2018-09-19 08:01:32,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fce579f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.09 08:01:32, skipping insertion in model container [2018-09-19 08:01:32,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.09 08:01:31" (2/3) ... [2018-09-19 08:01:32,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fce579f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.09 08:01:32, skipping insertion in model container [2018-09-19 08:01:32,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.09 08:01:32" (3/3) ... [2018-09-19 08:01:32,585 INFO L112 eAbstractionObserver]: Analyzing ICFG sendmail-close-angle_true-unreach-call_true-termination.i [2018-09-19 08:01:32,596 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-19 08:01:32,603 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-19 08:01:32,650 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-19 08:01:32,651 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-19 08:01:32,651 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-19 08:01:32,651 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-19 08:01:32,651 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-19 08:01:32,651 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-19 08:01:32,652 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-19 08:01:32,652 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-19 08:01:32,652 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-19 08:01:32,670 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2018-09-19 08:01:32,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-19 08:01:32,676 INFO L368 BasicCegarLoop]: Found error trace [2018-09-19 08:01:32,677 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-19 08:01:32,678 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-19 08:01:32,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1538012201, now seen corresponding path program 1 times [2018-09-19 08:01:32,687 INFO L69 tionRefinementEngine]: Using refinement strategy ToothlessTaipanRefinementStrategy [2018-09-19 08:01:32,688 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 15 with the following transitions: [2018-09-19 08:01:32,690 INFO L202 CegarAbsIntRunner]: [0], [4], [7], [13], [19], [23], [48], [59], [62], [64], [70], [71], [72], [82] [2018-09-19 08:01:32,747 INFO L148 AbstractInterpreter]: Using domain OctagonDomain [2018-09-19 08:01:32,747 INFO L101 FixpointEngine]: Starting fixpoint engine with domain OctagonDomain (maxUnwinding=3, maxParallelStates=1) [2018-09-19 08:01:32,801 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-09-19 08:01:32,802 INFO L272 AbstractInterpreter]: Visited 10 different actions 10 times. Never merged. Never widened. Never found a fixpoint. Largest state had 7 variables. [2018-09-19 08:01:32,816 INFO L399 sIntCurrentIteration]: Generating AbsInt predicates [2018-09-19 08:01:32,883 INFO L232 lantSequenceWeakener]: Weakened 2 states. On average, predicates are now at 65% of their original sizes. [2018-09-19 08:01:32,883 INFO L412 sIntCurrentIteration]: Unifying AI predicates [2018-09-19 08:01:33,033 INFO L423 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-09-19 08:01:33,035 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-19 08:01:33,036 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-09-19 08:01:33,036 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-19 08:01:33,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-19 08:01:33,046 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-19 08:01:33,047 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-09-19 08:01:33,049 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 7 states. [2018-09-19 08:01:33,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-19 08:01:33,779 INFO L93 Difference]: Finished difference Result 82 states and 124 transitions. [2018-09-19 08:01:33,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-19 08:01:33,781 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2018-09-19 08:01:33,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-19 08:01:33,792 INFO L225 Difference]: With dead ends: 82 [2018-09-19 08:01:33,792 INFO L226 Difference]: Without dead ends: 40 [2018-09-19 08:01:33,797 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2018-09-19 08:01:33,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-19 08:01:33,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 30. [2018-09-19 08:01:33,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-19 08:01:33,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2018-09-19 08:01:33,846 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 14 [2018-09-19 08:01:33,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-19 08:01:33,846 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2018-09-19 08:01:33,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-19 08:01:33,847 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2018-09-19 08:01:33,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-19 08:01:33,848 INFO L368 BasicCegarLoop]: Found error trace [2018-09-19 08:01:33,848 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-19 08:01:33,849 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-19 08:01:33,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1856547447, now seen corresponding path program 1 times [2018-09-19 08:01:33,849 INFO L69 tionRefinementEngine]: Using refinement strategy ToothlessTaipanRefinementStrategy [2018-09-19 08:01:33,850 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 17 with the following transitions: [2018-09-19 08:01:33,850 INFO L202 CegarAbsIntRunner]: [0], [4], [7], [13], [19], [23], [27], [29], [32], [59], [62], [64], [70], [71], [72], [82] [2018-09-19 08:01:33,852 INFO L148 AbstractInterpreter]: Using domain OctagonDomain [2018-09-19 08:01:33,852 INFO L101 FixpointEngine]: Starting fixpoint engine with domain OctagonDomain (maxUnwinding=3, maxParallelStates=1) [2018-09-19 08:01:33,865 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-09-19 08:01:33,866 INFO L272 AbstractInterpreter]: Visited 15 different actions 15 times. Never merged. Never widened. Never found a fixpoint. Largest state had 8 variables. [2018-09-19 08:01:33,901 INFO L399 sIntCurrentIteration]: Generating AbsInt predicates [2018-09-19 08:01:33,931 INFO L232 lantSequenceWeakener]: Weakened 6 states. On average, predicates are now at 67.78% of their original sizes. [2018-09-19 08:01:33,931 INFO L412 sIntCurrentIteration]: Unifying AI predicates [2018-09-19 08:01:34,190 INFO L423 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-09-19 08:01:34,191 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-19 08:01:34,191 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2018-09-19 08:01:34,191 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-19 08:01:34,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-19 08:01:34,193 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-19 08:01:34,193 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-09-19 08:01:34,194 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand 10 states. [2018-09-19 08:01:34,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-19 08:01:34,643 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2018-09-19 08:01:34,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-19 08:01:34,651 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2018-09-19 08:01:34,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-19 08:01:34,653 INFO L225 Difference]: With dead ends: 46 [2018-09-19 08:01:34,654 INFO L226 Difference]: Without dead ends: 44 [2018-09-19 08:01:34,656 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2018-09-19 08:01:34,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-19 08:01:34,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2018-09-19 08:01:34,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-19 08:01:34,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2018-09-19 08:01:34,679 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 16 [2018-09-19 08:01:34,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-19 08:01:34,681 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2018-09-19 08:01:34,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-19 08:01:34,682 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2018-09-19 08:01:34,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-19 08:01:34,684 INFO L368 BasicCegarLoop]: Found error trace [2018-09-19 08:01:34,684 INFO L376 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-19 08:01:34,684 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-19 08:01:34,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1389780875, now seen corresponding path program 1 times [2018-09-19 08:01:34,685 INFO L69 tionRefinementEngine]: Using refinement strategy ToothlessTaipanRefinementStrategy [2018-09-19 08:01:34,685 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 28 with the following transitions: [2018-09-19 08:01:34,686 INFO L202 CegarAbsIntRunner]: [0], [4], [7], [13], [19], [23], [27], [29], [32], [52], [59], [62], [64], [67], [69], [70], [71], [72], [82], [83], [84], [85], [86] [2018-09-19 08:01:34,688 INFO L148 AbstractInterpreter]: Using domain OctagonDomain [2018-09-19 08:01:34,689 INFO L101 FixpointEngine]: Starting fixpoint engine with domain OctagonDomain (maxUnwinding=3, maxParallelStates=1) [2018-09-19 08:01:34,718 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-09-19 08:01:34,719 INFO L272 AbstractInterpreter]: Visited 22 different actions 30 times. Never merged. Never widened. Never found a fixpoint. Largest state had 9 variables. [2018-09-19 08:01:34,725 INFO L399 sIntCurrentIteration]: Generating AbsInt predicates [2018-09-19 08:01:34,762 INFO L232 lantSequenceWeakener]: Weakened 15 states. On average, predicates are now at 70% of their original sizes. [2018-09-19 08:01:34,762 INFO L412 sIntCurrentIteration]: Unifying AI predicates [2018-09-19 08:01:35,237 INFO L423 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-09-19 08:01:35,238 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-19 08:01:35,238 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-09-19 08:01:35,238 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-19 08:01:35,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-19 08:01:35,239 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-19 08:01:35,239 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2018-09-19 08:01:35,240 INFO L87 Difference]: Start difference. First operand 42 states and 55 transitions. Second operand 12 states. [2018-09-19 08:01:35,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-19 08:01:35,909 INFO L93 Difference]: Finished difference Result 65 states and 86 transitions. [2018-09-19 08:01:35,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-19 08:01:35,911 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2018-09-19 08:01:35,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-19 08:01:35,913 INFO L225 Difference]: With dead ends: 65 [2018-09-19 08:01:35,913 INFO L226 Difference]: Without dead ends: 58 [2018-09-19 08:01:35,914 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2018-09-19 08:01:35,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-19 08:01:35,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2018-09-19 08:01:35,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-19 08:01:35,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2018-09-19 08:01:35,932 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 27 [2018-09-19 08:01:35,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-19 08:01:35,932 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2018-09-19 08:01:35,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-19 08:01:35,933 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2018-09-19 08:01:35,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-19 08:01:35,934 INFO L368 BasicCegarLoop]: Found error trace [2018-09-19 08:01:35,934 INFO L376 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-19 08:01:35,934 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-19 08:01:35,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1060690802, now seen corresponding path program 1 times [2018-09-19 08:01:35,935 INFO L69 tionRefinementEngine]: Using refinement strategy ToothlessTaipanRefinementStrategy [2018-09-19 08:01:35,935 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 30 with the following transitions: [2018-09-19 08:01:35,935 INFO L202 CegarAbsIntRunner]: [0], [4], [7], [13], [19], [23], [27], [29], [34], [39], [42], [44], [59], [62], [64], [67], [69], [70], [71], [72], [74], [75], [76], [77], [78] [2018-09-19 08:01:35,938 INFO L148 AbstractInterpreter]: Using domain OctagonDomain [2018-09-19 08:01:35,938 INFO L101 FixpointEngine]: Starting fixpoint engine with domain OctagonDomain (maxUnwinding=3, maxParallelStates=1) [2018-09-19 08:01:35,952 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-09-19 08:01:35,952 INFO L272 AbstractInterpreter]: Visited 24 different actions 32 times. Never merged. Never widened. Never found a fixpoint. Largest state had 10 variables. [2018-09-19 08:01:35,981 INFO L399 sIntCurrentIteration]: Generating AbsInt predicates [2018-09-19 08:01:36,022 INFO L232 lantSequenceWeakener]: Weakened 17 states. On average, predicates are now at 57.45% of their original sizes. [2018-09-19 08:01:36,022 INFO L412 sIntCurrentIteration]: Unifying AI predicates [2018-09-19 08:01:36,734 INFO L423 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-09-19 08:01:36,734 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-19 08:01:36,735 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2018-09-19 08:01:36,735 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-19 08:01:36,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-19 08:01:36,735 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-19 08:01:36,736 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2018-09-19 08:01:36,736 INFO L87 Difference]: Start difference. First operand 56 states and 72 transitions. Second operand 14 states. [2018-09-19 08:01:37,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-19 08:01:37,471 INFO L93 Difference]: Finished difference Result 67 states and 83 transitions. [2018-09-19 08:01:37,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-19 08:01:37,471 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2018-09-19 08:01:37,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-19 08:01:37,472 INFO L225 Difference]: With dead ends: 67 [2018-09-19 08:01:37,473 INFO L226 Difference]: Without dead ends: 65 [2018-09-19 08:01:37,473 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2018-09-19 08:01:37,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-19 08:01:37,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 60. [2018-09-19 08:01:37,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-19 08:01:37,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 75 transitions. [2018-09-19 08:01:37,490 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 75 transitions. Word has length 29 [2018-09-19 08:01:37,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-19 08:01:37,491 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 75 transitions. [2018-09-19 08:01:37,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-19 08:01:37,491 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 75 transitions. [2018-09-19 08:01:37,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-19 08:01:37,492 INFO L368 BasicCegarLoop]: Found error trace [2018-09-19 08:01:37,493 INFO L376 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-19 08:01:37,493 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-19 08:01:37,493 INFO L82 PathProgramCache]: Analyzing trace with hash 434465614, now seen corresponding path program 1 times [2018-09-19 08:01:37,493 INFO L69 tionRefinementEngine]: Using refinement strategy ToothlessTaipanRefinementStrategy [2018-09-19 08:01:37,494 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 35 with the following transitions: [2018-09-19 08:01:37,494 INFO L202 CegarAbsIntRunner]: [0], [4], [7], [13], [19], [23], [27], [29], [34], [39], [42], [44], [59], [62], [64], [67], [69], [70], [71], [72], [74], [75], [76], [77], [78], [79], [80] [2018-09-19 08:01:37,496 INFO L148 AbstractInterpreter]: Using domain OctagonDomain [2018-09-19 08:01:37,496 INFO L101 FixpointEngine]: Starting fixpoint engine with domain OctagonDomain (maxUnwinding=3, maxParallelStates=1) [2018-09-19 08:01:37,514 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-09-19 08:01:37,516 INFO L272 AbstractInterpreter]: Visited 26 different actions 38 times. Never merged. Never widened. Never found a fixpoint. Largest state had 10 variables. [2018-09-19 08:01:37,553 INFO L399 sIntCurrentIteration]: Generating AbsInt predicates [2018-09-19 08:01:37,634 INFO L232 lantSequenceWeakener]: Weakened 16 states. On average, predicates are now at 66.25% of their original sizes. [2018-09-19 08:01:37,638 INFO L412 sIntCurrentIteration]: Unifying AI predicates [2018-09-19 08:01:38,078 INFO L423 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-09-19 08:01:38,079 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-19 08:01:38,079 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2018-09-19 08:01:38,079 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-19 08:01:38,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-19 08:01:38,081 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-19 08:01:38,081 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2018-09-19 08:01:38,081 INFO L87 Difference]: Start difference. First operand 60 states and 75 transitions. Second operand 14 states. [2018-09-19 08:01:39,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-19 08:01:39,023 INFO L93 Difference]: Finished difference Result 71 states and 86 transitions. [2018-09-19 08:01:39,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-19 08:01:39,024 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2018-09-19 08:01:39,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-19 08:01:39,026 INFO L225 Difference]: With dead ends: 71 [2018-09-19 08:01:39,026 INFO L226 Difference]: Without dead ends: 69 [2018-09-19 08:01:39,027 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2018-09-19 08:01:39,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-19 08:01:39,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 64. [2018-09-19 08:01:39,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-19 08:01:39,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2018-09-19 08:01:39,045 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 34 [2018-09-19 08:01:39,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-19 08:01:39,045 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2018-09-19 08:01:39,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-19 08:01:39,046 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2018-09-19 08:01:39,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-19 08:01:39,048 INFO L368 BasicCegarLoop]: Found error trace [2018-09-19 08:01:39,048 INFO L376 BasicCegarLoop]: trace histogram [7, 6, 6, 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, 1, 1, 1, 1] [2018-09-19 08:01:39,048 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-19 08:01:39,049 INFO L82 PathProgramCache]: Analyzing trace with hash 544440444, now seen corresponding path program 1 times [2018-09-19 08:01:39,049 INFO L69 tionRefinementEngine]: Using refinement strategy ToothlessTaipanRefinementStrategy [2018-09-19 08:01:39,049 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 54 with the following transitions: [2018-09-19 08:01:39,049 INFO L202 CegarAbsIntRunner]: [0], [4], [7], [13], [19], [23], [27], [29], [32], [34], [39], [42], [44], [52], [59], [62], [64], [67], [69], [70], [71], [72], [74], [75], [76], [77], [78], [79], [80], [81], [82], [83], [84], [85], [86] [2018-09-19 08:01:39,051 INFO L148 AbstractInterpreter]: Using domain OctagonDomain [2018-09-19 08:01:39,052 INFO L101 FixpointEngine]: Starting fixpoint engine with domain OctagonDomain (maxUnwinding=3, maxParallelStates=1) [2018-09-19 08:01:39,162 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-09-19 08:01:39,162 INFO L272 AbstractInterpreter]: Visited 34 different actions 401 times. Merged at 14 different actions 98 times. Widened at 1 different actions 3 times. Found 1 fixpoints after 1 different actions. Largest state had 11 variables. [2018-09-19 08:01:39,186 INFO L399 sIntCurrentIteration]: Generating AbsInt predicates [2018-09-19 08:01:39,238 INFO L232 lantSequenceWeakener]: Weakened 32 states. On average, predicates are now at 66.25% of their original sizes. [2018-09-19 08:01:39,238 INFO L412 sIntCurrentIteration]: Unifying AI predicates [2018-09-19 08:01:39,710 INFO L423 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-09-19 08:01:39,711 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-19 08:01:39,711 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2018-09-19 08:01:39,711 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-19 08:01:39,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-19 08:01:39,712 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-19 08:01:39,712 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2018-09-19 08:01:39,712 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand 17 states. [2018-09-19 08:01:40,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-19 08:01:40,418 INFO L93 Difference]: Finished difference Result 87 states and 109 transitions. [2018-09-19 08:01:40,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-19 08:01:40,418 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 53 [2018-09-19 08:01:40,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-19 08:01:40,421 INFO L225 Difference]: With dead ends: 87 [2018-09-19 08:01:40,422 INFO L226 Difference]: Without dead ends: 85 [2018-09-19 08:01:40,422 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2018-09-19 08:01:40,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-19 08:01:40,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 80. [2018-09-19 08:01:40,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-19 08:01:40,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 100 transitions. [2018-09-19 08:01:40,444 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 100 transitions. Word has length 53 [2018-09-19 08:01:40,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-19 08:01:40,445 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 100 transitions. [2018-09-19 08:01:40,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-19 08:01:40,445 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 100 transitions. [2018-09-19 08:01:40,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-19 08:01:40,447 INFO L368 BasicCegarLoop]: Found error trace [2018-09-19 08:01:40,447 INFO L376 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-19 08:01:40,447 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-19 08:01:40,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1684026049, now seen corresponding path program 1 times [2018-09-19 08:01:40,448 INFO L69 tionRefinementEngine]: Using refinement strategy ToothlessTaipanRefinementStrategy [2018-09-19 08:01:40,448 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 56 with the following transitions: [2018-09-19 08:01:40,448 INFO L202 CegarAbsIntRunner]: [0], [4], [7], [13], [19], [23], [27], [29], [34], [39], [42], [44], [59], [62], [64], [67], [69], [70], [71], [72], [74], [75], [76], [77], [78], [79], [80], [81] [2018-09-19 08:01:40,450 INFO L148 AbstractInterpreter]: Using domain OctagonDomain [2018-09-19 08:01:40,451 INFO L101 FixpointEngine]: Starting fixpoint engine with domain OctagonDomain (maxUnwinding=3, maxParallelStates=1) [2018-09-19 08:01:40,506 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-09-19 08:01:40,506 INFO L272 AbstractInterpreter]: Visited 27 different actions 249 times. Merged at 10 different actions 70 times. Widened at 1 different actions 3 times. Found 1 fixpoints after 1 different actions. Largest state had 10 variables. [2018-09-19 08:01:40,544 INFO L399 sIntCurrentIteration]: Generating AbsInt predicates [2018-09-19 08:01:40,608 INFO L232 lantSequenceWeakener]: Weakened 28 states. On average, predicates are now at 68.81% of their original sizes. [2018-09-19 08:01:40,609 INFO L412 sIntCurrentIteration]: Unifying AI predicates [2018-09-19 08:01:41,229 INFO L423 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-09-19 08:01:41,230 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-19 08:01:41,230 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2018-09-19 08:01:41,230 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-19 08:01:41,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-19 08:01:41,231 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-19 08:01:41,232 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2018-09-19 08:01:41,232 INFO L87 Difference]: Start difference. First operand 80 states and 100 transitions. Second operand 19 states. [2018-09-19 08:01:42,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-19 08:01:42,223 INFO L93 Difference]: Finished difference Result 90 states and 108 transitions. [2018-09-19 08:01:42,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-19 08:01:42,224 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 55 [2018-09-19 08:01:42,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-19 08:01:42,227 INFO L225 Difference]: With dead ends: 90 [2018-09-19 08:01:42,227 INFO L226 Difference]: Without dead ends: 88 [2018-09-19 08:01:42,228 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 62 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=153, Invalid=497, Unknown=0, NotChecked=0, Total=650 [2018-09-19 08:01:42,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-19 08:01:42,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-09-19 08:01:42,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-19 08:01:42,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 106 transitions. [2018-09-19 08:01:42,253 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 106 transitions. Word has length 55 [2018-09-19 08:01:42,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-19 08:01:42,254 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 106 transitions. [2018-09-19 08:01:42,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-19 08:01:42,254 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 106 transitions. [2018-09-19 08:01:42,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-19 08:01:42,256 INFO L368 BasicCegarLoop]: Found error trace [2018-09-19 08:01:42,256 INFO L376 BasicCegarLoop]: trace histogram [8, 7, 7, 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, 1, 1, 1, 1, 1, 1] [2018-09-19 08:01:42,257 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-19 08:01:42,257 INFO L82 PathProgramCache]: Analyzing trace with hash -2058374368, now seen corresponding path program 1 times [2018-09-19 08:01:42,257 INFO L69 tionRefinementEngine]: Using refinement strategy ToothlessTaipanRefinementStrategy [2018-09-19 08:01:42,257 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 59 with the following transitions: [2018-09-19 08:01:42,257 INFO L202 CegarAbsIntRunner]: [0], [4], [7], [13], [19], [23], [27], [29], [32], [34], [39], [42], [44], [52], [59], [62], [64], [67], [69], [70], [71], [72], [74], [75], [76], [77], [78], [79], [80], [81], [82], [83], [84], [85], [86], [87], [88] [2018-09-19 08:01:42,259 INFO L148 AbstractInterpreter]: Using domain OctagonDomain [2018-09-19 08:01:42,260 INFO L101 FixpointEngine]: Starting fixpoint engine with domain OctagonDomain (maxUnwinding=3, maxParallelStates=1) [2018-09-19 08:01:42,325 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-09-19 08:01:42,325 INFO L272 AbstractInterpreter]: Visited 36 different actions 449 times. Merged at 15 different actions 105 times. Widened at 1 different actions 3 times. Found 1 fixpoints after 1 different actions. Largest state had 11 variables. [2018-09-19 08:01:42,357 INFO L399 sIntCurrentIteration]: Generating AbsInt predicates [2018-09-19 08:01:42,395 INFO L232 lantSequenceWeakener]: Weakened 36 states. On average, predicates are now at 66.39% of their original sizes. [2018-09-19 08:01:42,395 INFO L412 sIntCurrentIteration]: Unifying AI predicates [2018-09-19 08:01:42,742 INFO L423 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-09-19 08:01:42,743 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-19 08:01:42,743 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2018-09-19 08:01:42,743 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-19 08:01:42,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-19 08:01:42,744 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-19 08:01:42,745 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2018-09-19 08:01:42,745 INFO L87 Difference]: Start difference. First operand 88 states and 106 transitions. Second operand 16 states. [2018-09-19 08:01:43,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-19 08:01:43,634 INFO L93 Difference]: Finished difference Result 103 states and 121 transitions. [2018-09-19 08:01:43,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-19 08:01:43,635 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 58 [2018-09-19 08:01:43,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-19 08:01:43,637 INFO L225 Difference]: With dead ends: 103 [2018-09-19 08:01:43,638 INFO L226 Difference]: Without dead ends: 88 [2018-09-19 08:01:43,638 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2018-09-19 08:01:43,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-19 08:01:43,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2018-09-19 08:01:43,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-19 08:01:43,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 101 transitions. [2018-09-19 08:01:43,660 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 101 transitions. Word has length 58 [2018-09-19 08:01:43,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-19 08:01:43,660 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 101 transitions. [2018-09-19 08:01:43,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-19 08:01:43,661 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 101 transitions. [2018-09-19 08:01:43,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-19 08:01:43,662 INFO L368 BasicCegarLoop]: Found error trace [2018-09-19 08:01:43,663 INFO L376 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-19 08:01:43,663 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-19 08:01:43,663 INFO L82 PathProgramCache]: Analyzing trace with hash 188311085, now seen corresponding path program 2 times [2018-09-19 08:01:43,663 INFO L69 tionRefinementEngine]: Using refinement strategy ToothlessTaipanRefinementStrategy [2018-09-19 08:01:43,663 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-09-19 08:01:43,664 INFO L443 BasicCegarLoop]: Counterexample might be feasible [2018-09-19 08:01:43,686 WARN L209 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2018-09-19 08:01:43,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.09 08:01:43 BoogieIcfgContainer [2018-09-19 08:01:43,687 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-19 08:01:43,687 INFO L168 Benchmark]: Toolchain (without parser) took 11990.18 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 874.5 MB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -675.3 MB). Peak memory consumption was 199.2 MB. Max. memory is 7.1 GB. [2018-09-19 08:01:43,689 INFO L168 Benchmark]: CDTParser took 1.42 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-19 08:01:43,690 INFO L168 Benchmark]: CACSL2BoogieTranslator took 265.39 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-09-19 08:01:43,690 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.65 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-19 08:01:43,691 INFO L168 Benchmark]: Boogie Preprocessor took 23.65 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-19 08:01:43,692 INFO L168 Benchmark]: RCFGBuilder took 560.54 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 755.5 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -797.8 MB). Peak memory consumption was 26.7 MB. Max. memory is 7.1 GB. [2018-09-19 08:01:43,693 INFO L168 Benchmark]: TraceAbstraction took 11110.74 ms. Allocated memory was 2.3 GB in the beginning and 2.4 GB in the end (delta: 119.0 MB). Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 112.0 MB). Peak memory consumption was 231.0 MB. Max. memory is 7.1 GB. [2018-09-19 08:01:43,697 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.42 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 265.39 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 23.65 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 23.65 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 560.54 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 755.5 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -797.8 MB). Peak memory consumption was 26.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11110.74 ms. Allocated memory was 2.3 GB in the beginning and 2.4 GB in the end (delta: 119.0 MB). Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 112.0 MB). Peak memory consumption was 231.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 5]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L12] int in; [L13] int inlen = __VERIFIER_nondet_int(); [L14] int bufferlen = __VERIFIER_nondet_int(); [L15] int buf; [L16] int buflim; [L17] COND TRUE bufferlen >1 [L18] COND TRUE inlen > 0 [L19] COND TRUE bufferlen < inlen [L20] buf = 0 [L21] in = 0 [L22] buflim = bufferlen - 2 [L23] COND TRUE __VERIFIER_nondet_int() [L25] COND FALSE !(buf == buflim) [L27] CALL __VERIFIER_assert(0<=buf) [L4] COND FALSE, RET !(!(cond)) [L27] __VERIFIER_assert(0<=buf) [L28] CALL __VERIFIER_assert(buf