/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/MADWiFi-encode_ie_ok.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 13:26:37,875 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 13:26:37,878 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 13:26:37,915 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-21 13:26:37,938 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 13:26:37,942 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 13:26:37,944 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 13:26:37,946 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 13:26:37,947 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 13:26:37,948 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 13:26:37,949 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 13:26:37,957 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 13:26:37,959 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 13:26:37,960 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 13:26:37,961 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 13:26:37,962 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 13:26:37,974 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 13:26:37,992 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 13:26:37,993 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 13:26:37,994 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 13:26:37,994 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 13:26:38,031 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 13:26:38,031 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 13:26:38,033 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 13:26:38,033 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 13:26:38,033 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 13:26:38,034 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 13:26:38,034 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 13:26:38,034 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 13:26:38,034 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 13:26:38,035 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 13:26:38,036 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 13:26:38,036 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 13:26:38,036 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 13:26:38,037 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 13:26:38,037 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 13:26:38,037 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 13:26:38,037 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 13:26:38,037 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 13:26:38,038 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 13:26:38,038 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 13:26:38,038 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 13:26:38,038 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 13:26:38,039 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 13:26:38,039 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 13:26:38,039 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 13:26:38,039 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 13:26:38,039 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 13:26:38,040 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 13:26:38,040 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 13:26:38,040 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-08-21 13:26:38,335 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 13:26:38,347 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 13:26:38,354 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 13:26:38,355 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 13:26:38,357 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 13:26:38,358 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/MADWiFi-encode_ie_ok.i [2020-08-21 13:26:38,427 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6b4ad5c1b/9e85be569275414d9ff3c68a0cd4d894/FLAG5a996844e [2020-08-21 13:26:38,876 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 13:26:38,877 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/MADWiFi-encode_ie_ok.i [2020-08-21 13:26:38,885 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6b4ad5c1b/9e85be569275414d9ff3c68a0cd4d894/FLAG5a996844e [2020-08-21 13:26:39,268 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6b4ad5c1b/9e85be569275414d9ff3c68a0cd4d894 [2020-08-21 13:26:39,279 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 13:26:39,280 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 13:26:39,283 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 13:26:39,283 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 13:26:39,286 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 13:26:39,287 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 01:26:39" (1/1) ... [2020-08-21 13:26:39,290 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c2d0e9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:26:39, skipping insertion in model container [2020-08-21 13:26:39,290 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 01:26:39" (1/1) ... [2020-08-21 13:26:39,298 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 13:26:39,317 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 13:26:39,513 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 13:26:39,517 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 13:26:39,533 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 13:26:39,548 INFO L208 MainTranslator]: Completed translation [2020-08-21 13:26:39,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:26:39 WrapperNode [2020-08-21 13:26:39,549 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 13:26:39,550 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 13:26:39,550 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 13:26:39,550 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 13:26:39,561 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:26:39" (1/1) ... [2020-08-21 13:26:39,561 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:26:39" (1/1) ... [2020-08-21 13:26:39,647 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:26:39" (1/1) ... [2020-08-21 13:26:39,648 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:26:39" (1/1) ... [2020-08-21 13:26:39,656 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:26:39" (1/1) ... [2020-08-21 13:26:39,662 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:26:39" (1/1) ... [2020-08-21 13:26:39,663 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:26:39" (1/1) ... [2020-08-21 13:26:39,665 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 13:26:39,665 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 13:26:39,666 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 13:26:39,666 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 13:26:39,667 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:26:39" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-21 13:26:39,731 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 13:26:39,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 13:26:39,732 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-21 13:26:39,732 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 13:26:39,732 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 13:26:39,732 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 13:26:39,732 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 13:26:39,733 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-21 13:26:39,733 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 13:26:39,733 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 13:26:39,733 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 13:26:39,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 13:26:39,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 13:26:39,944 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 13:26:39,944 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 13:26:39,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:26:39 BoogieIcfgContainer [2020-08-21 13:26:39,948 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 13:26:39,950 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 13:26:39,950 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 13:26:39,953 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 13:26:39,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 01:26:39" (1/3) ... [2020-08-21 13:26:39,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20cd7d6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:26:39, skipping insertion in model container [2020-08-21 13:26:39,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:26:39" (2/3) ... [2020-08-21 13:26:39,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20cd7d6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:26:39, skipping insertion in model container [2020-08-21 13:26:39,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:26:39" (3/3) ... [2020-08-21 13:26:39,956 INFO L109 eAbstractionObserver]: Analyzing ICFG MADWiFi-encode_ie_ok.i [2020-08-21 13:26:39,968 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 13:26:39,980 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 13:26:40,011 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 13:26:40,062 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 13:26:40,065 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 13:26:40,065 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 13:26:40,065 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 13:26:40,065 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 13:26:40,066 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 13:26:40,066 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 13:26:40,066 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 13:26:40,090 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-08-21 13:26:40,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 13:26:40,095 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:26:40,096 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:26:40,097 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:26:40,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:26:40,102 INFO L82 PathProgramCache]: Analyzing trace with hash 921445730, now seen corresponding path program 1 times [2020-08-21 13:26:40,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:26:40,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1827122730] [2020-08-21 13:26:40,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:26:40,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:40,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:26:40,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:40,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:26:40,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1827122730] [2020-08-21 13:26:40,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:26:40,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 13:26:40,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518460525] [2020-08-21 13:26:40,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 13:26:40,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:26:40,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 13:26:40,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 13:26:40,363 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 6 states. [2020-08-21 13:26:40,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:26:40,480 INFO L93 Difference]: Finished difference Result 51 states and 67 transitions. [2020-08-21 13:26:40,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 13:26:40,482 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-08-21 13:26:40,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:26:40,491 INFO L225 Difference]: With dead ends: 51 [2020-08-21 13:26:40,491 INFO L226 Difference]: Without dead ends: 28 [2020-08-21 13:26:40,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-21 13:26:40,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-21 13:26:40,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-08-21 13:26:40,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-21 13:26:40,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-08-21 13:26:40,541 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 18 [2020-08-21 13:26:40,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:26:40,541 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-08-21 13:26:40,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 13:26:40,542 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-08-21 13:26:40,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 13:26:40,543 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:26:40,543 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:26:40,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 13:26:40,544 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:26:40,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:26:40,545 INFO L82 PathProgramCache]: Analyzing trace with hash 487181509, now seen corresponding path program 1 times [2020-08-21 13:26:40,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:26:40,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [932783024] [2020-08-21 13:26:40,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:26:40,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:40,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:26:40,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:40,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-08-21 13:26:40,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:40,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:26:40,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [932783024] [2020-08-21 13:26:40,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:26:40,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 13:26:40,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629950436] [2020-08-21 13:26:40,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 13:26:40,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:26:40,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 13:26:40,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 13:26:40,694 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 6 states. [2020-08-21 13:26:40,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:26:40,779 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2020-08-21 13:26:40,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 13:26:40,779 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-08-21 13:26:40,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:26:40,782 INFO L225 Difference]: With dead ends: 38 [2020-08-21 13:26:40,782 INFO L226 Difference]: Without dead ends: 36 [2020-08-21 13:26:40,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-21 13:26:40,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-21 13:26:40,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-08-21 13:26:40,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-08-21 13:26:40,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-08-21 13:26:40,797 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 23 [2020-08-21 13:26:40,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:26:40,798 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-08-21 13:26:40,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 13:26:40,798 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-08-21 13:26:40,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-21 13:26:40,800 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:26:40,800 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:26:40,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 13:26:40,801 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:26:40,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:26:40,802 INFO L82 PathProgramCache]: Analyzing trace with hash 258938125, now seen corresponding path program 1 times [2020-08-21 13:26:40,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:26:40,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1955094371] [2020-08-21 13:26:40,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:26:40,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:40,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:26:40,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:40,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-08-21 13:26:40,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:40,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 13:26:40,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:40,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 13:26:41,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:41,015 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-08-21 13:26:41,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1955094371] [2020-08-21 13:26:41,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:26:41,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 13:26:41,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498285648] [2020-08-21 13:26:41,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 13:26:41,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:26:41,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 13:26:41,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 13:26:41,020 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 8 states. [2020-08-21 13:26:41,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:26:41,198 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2020-08-21 13:26:41,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 13:26:41,199 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-08-21 13:26:41,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:26:41,199 INFO L225 Difference]: With dead ends: 36 [2020-08-21 13:26:41,199 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 13:26:41,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-08-21 13:26:41,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 13:26:41,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 13:26:41,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 13:26:41,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 13:26:41,201 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2020-08-21 13:26:41,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:26:41,202 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 13:26:41,202 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 13:26:41,202 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 13:26:41,202 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 13:26:41,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 13:26:41,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 13:26:41,270 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 13:26:41,270 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 13:26:41,270 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 13:26:41,270 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 13:26:41,270 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 13:26:41,271 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 13:26:41,271 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-08-21 13:26:41,271 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-08-21 13:26:41,271 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-08-21 13:26:41,271 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-08-21 13:26:41,271 INFO L268 CegarLoopResult]: For program point L27(line 27) no Hoare annotation was computed. [2020-08-21 13:26:41,272 INFO L268 CegarLoopResult]: For program point L27-1(lines 14 45) no Hoare annotation was computed. [2020-08-21 13:26:41,272 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 45) no Hoare annotation was computed. [2020-08-21 13:26:41,272 INFO L268 CegarLoopResult]: For program point L40(line 40) no Hoare annotation was computed. [2020-08-21 13:26:41,272 INFO L268 CegarLoopResult]: For program point L36(lines 36 37) no Hoare annotation was computed. [2020-08-21 13:26:41,272 INFO L268 CegarLoopResult]: For program point L28(lines 14 45) no Hoare annotation was computed. [2020-08-21 13:26:41,272 INFO L268 CegarLoopResult]: For program point L24(line 24) no Hoare annotation was computed. [2020-08-21 13:26:41,272 INFO L268 CegarLoopResult]: For program point L29(lines 14 45) no Hoare annotation was computed. [2020-08-21 13:26:41,272 INFO L268 CegarLoopResult]: For program point L25(line 25) no Hoare annotation was computed. [2020-08-21 13:26:41,273 INFO L268 CegarLoopResult]: For program point L38-2(lines 38 42) no Hoare annotation was computed. [2020-08-21 13:26:41,273 INFO L264 CegarLoopResult]: At program point L38-3(lines 38 42) the Hoare annotation is: (and (<= 1 main_~p~0) (<= 1 main_~leader_len~0) (<= (+ (* 2 main_~ielen~0) main_~p~0) (+ main_~bufsize_0~0 (* 2 main_~i~0)))) [2020-08-21 13:26:41,273 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 45) the Hoare annotation is: true [2020-08-21 13:26:41,273 INFO L268 CegarLoopResult]: For program point L26(line 26) no Hoare annotation was computed. [2020-08-21 13:26:41,273 INFO L271 CegarLoopResult]: At program point L43(lines 13 45) the Hoare annotation is: true [2020-08-21 13:26:41,274 INFO L264 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: (and (<= 1 main_~p~0) (<= 1 main_~leader_len~0) (<= (+ (* 2 main_~ielen~0) main_~p~0) (+ main_~bufsize_0~0 (* 2 main_~i~0))) (<= (+ main_~p~0 2) main_~bufsize_0~0)) [2020-08-21 13:26:41,274 INFO L264 CegarLoopResult]: At program point L39-1(line 39) the Hoare annotation is: (and (<= 1 main_~p~0) (<= 1 main_~leader_len~0) (<= (+ (* 2 main_~ielen~0) main_~p~0) (+ main_~bufsize_0~0 (* 2 main_~i~0))) (<= (+ main_~p~0 2) main_~bufsize_0~0)) [2020-08-21 13:26:41,274 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-08-21 13:26:41,274 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-08-21 13:26:41,275 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-08-21 13:26:41,275 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-08-21 13:26:41,275 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-08-21 13:26:41,275 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-08-21 13:26:41,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 01:26:41 BoogieIcfgContainer [2020-08-21 13:26:41,294 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 13:26:41,297 INFO L168 Benchmark]: Toolchain (without parser) took 2015.65 ms. Allocated memory was 147.3 MB in the beginning and 235.4 MB in the end (delta: 88.1 MB). Free memory was 103.2 MB in the beginning and 194.4 MB in the end (delta: -91.2 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 13:26:41,298 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 147.3 MB. Free memory was 121.9 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 13:26:41,299 INFO L168 Benchmark]: CACSL2BoogieTranslator took 266.45 ms. Allocated memory is still 147.3 MB. Free memory was 103.0 MB in the beginning and 93.3 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-08-21 13:26:41,300 INFO L168 Benchmark]: Boogie Preprocessor took 115.14 ms. Allocated memory was 147.3 MB in the beginning and 202.9 MB in the end (delta: 55.6 MB). Free memory was 93.3 MB in the beginning and 181.0 MB in the end (delta: -87.7 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-08-21 13:26:41,301 INFO L168 Benchmark]: RCFGBuilder took 283.16 ms. Allocated memory is still 202.9 MB. Free memory was 181.0 MB in the beginning and 166.0 MB in the end (delta: 15.0 MB). Peak memory consumption was 15.0 MB. Max. memory is 7.1 GB. [2020-08-21 13:26:41,302 INFO L168 Benchmark]: TraceAbstraction took 1344.38 ms. Allocated memory was 202.9 MB in the beginning and 235.4 MB in the end (delta: 32.5 MB). Free memory was 166.0 MB in the beginning and 194.4 MB in the end (delta: -28.4 MB). Peak memory consumption was 4.1 MB. Max. memory is 7.1 GB. [2020-08-21 13:26:41,306 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 147.3 MB. Free memory was 121.9 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 266.45 ms. Allocated memory is still 147.3 MB. Free memory was 103.0 MB in the beginning and 93.3 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 115.14 ms. Allocated memory was 147.3 MB in the beginning and 202.9 MB in the end (delta: 55.6 MB). Free memory was 93.3 MB in the beginning and 181.0 MB in the end (delta: -87.7 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 283.16 ms. Allocated memory is still 202.9 MB. Free memory was 181.0 MB in the beginning and 166.0 MB in the end (delta: 15.0 MB). Peak memory consumption was 15.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1344.38 ms. Allocated memory was 202.9 MB in the beginning and 235.4 MB in the end (delta: 32.5 MB). Free memory was 166.0 MB in the beginning and 194.4 MB in the end (delta: -28.4 MB). Peak memory consumption was 4.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 38]: Loop Invariant Derived loop invariant: (1 <= p && 1 <= leader_len) && 2 * ielen + p <= bufsize_0 + 2 * i - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.1s, OverallIterations: 3, TraceHistogramMax: 4, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 77 SDtfs, 33 SDslu, 261 SDs, 0 SdLazy, 106 SolverSat, 23 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 14 PreInvPairs, 23 NumberOfFragments, 70 HoareAnnotationTreeSize, 14 FomulaSimplifications, 92 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 77 NumberOfCodeBlocks, 77 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 74 ConstructedInterpolants, 0 QuantifiedInterpolants, 5553 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 21/23 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...