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 -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/loops/verisec_NetBSD-libc_loop.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-0883e75 [2019-09-05 12:46:15,029 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-05 12:46:15,031 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-05 12:46:15,042 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-05 12:46:15,042 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-05 12:46:15,043 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-05 12:46:15,045 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-05 12:46:15,046 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-05 12:46:15,048 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-05 12:46:15,049 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-05 12:46:15,050 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-05 12:46:15,051 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-05 12:46:15,051 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-05 12:46:15,052 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-05 12:46:15,053 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-05 12:46:15,054 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-05 12:46:15,055 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-05 12:46:15,056 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-05 12:46:15,058 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-05 12:46:15,061 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-05 12:46:15,064 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-05 12:46:15,067 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-05 12:46:15,068 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-05 12:46:15,070 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-05 12:46:15,073 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-05 12:46:15,076 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-05 12:46:15,077 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-05 12:46:15,079 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-05 12:46:15,079 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-05 12:46:15,081 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-05 12:46:15,082 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-05 12:46:15,082 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-05 12:46:15,082 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-05 12:46:15,083 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-05 12:46:15,083 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-05 12:46:15,084 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-05 12:46:15,086 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-05 12:46:15,109 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-05 12:46:15,109 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-05 12:46:15,110 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-05 12:46:15,110 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-05 12:46:15,111 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-05 12:46:15,111 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-05 12:46:15,111 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-05 12:46:15,111 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-05 12:46:15,112 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-05 12:46:15,112 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-05 12:46:15,113 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-05 12:46:15,113 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-05 12:46:15,114 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-05 12:46:15,114 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-05 12:46:15,114 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-05 12:46:15,114 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-05 12:46:15,115 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-05 12:46:15,115 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-05 12:46:15,115 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-05 12:46:15,115 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-05 12:46:15,115 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-05 12:46:15,116 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-05 12:46:15,116 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-05 12:46:15,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-05 12:46:15,116 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-05 12:46:15,117 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-05 12:46:15,117 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-05 12:46:15,117 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-05 12:46:15,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-05 12:46:15,117 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-05 12:46:15,151 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-05 12:46:15,168 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-05 12:46:15,173 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-05 12:46:15,175 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-05 12:46:15,176 INFO L275 PluginConnector]: CDTParser initialized [2019-09-05 12:46:15,177 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/verisec_NetBSD-libc_loop.i [2019-09-05 12:46:15,243 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea91986bf/bd913f8b390a4b2bac3f29b361c9a115/FLAG8b96cdf6e [2019-09-05 12:46:15,695 INFO L306 CDTParser]: Found 1 translation units. [2019-09-05 12:46:15,695 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/verisec_NetBSD-libc_loop.i [2019-09-05 12:46:15,700 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea91986bf/bd913f8b390a4b2bac3f29b361c9a115/FLAG8b96cdf6e [2019-09-05 12:46:16,128 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea91986bf/bd913f8b390a4b2bac3f29b361c9a115 [2019-09-05 12:46:16,141 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-05 12:46:16,142 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-05 12:46:16,143 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-05 12:46:16,143 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-05 12:46:16,147 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-05 12:46:16,148 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 12:46:16" (1/1) ... [2019-09-05 12:46:16,151 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f07c2ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:16, skipping insertion in model container [2019-09-05 12:46:16,151 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 12:46:16" (1/1) ... [2019-09-05 12:46:16,158 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-05 12:46:16,175 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-05 12:46:16,388 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 12:46:16,400 INFO L188 MainTranslator]: Completed pre-run [2019-09-05 12:46:16,419 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 12:46:16,521 INFO L192 MainTranslator]: Completed translation [2019-09-05 12:46:16,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:16 WrapperNode [2019-09-05 12:46:16,522 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-05 12:46:16,523 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-05 12:46:16,523 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-05 12:46:16,523 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-05 12:46:16,535 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:16" (1/1) ... [2019-09-05 12:46:16,536 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:16" (1/1) ... [2019-09-05 12:46:16,544 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:16" (1/1) ... [2019-09-05 12:46:16,544 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:16" (1/1) ... [2019-09-05 12:46:16,558 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:16" (1/1) ... [2019-09-05 12:46:16,562 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:16" (1/1) ... [2019-09-05 12:46:16,563 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:16" (1/1) ... [2019-09-05 12:46:16,565 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-05 12:46:16,565 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-05 12:46:16,566 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-05 12:46:16,566 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-05 12:46:16,567 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:16" (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 [2019-09-05 12:46:16,625 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-05 12:46:16,626 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-05 12:46:16,626 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-05 12:46:16,626 INFO L138 BoogieDeclarations]: Found implementation of procedure glob2 [2019-09-05 12:46:16,626 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-05 12:46:16,626 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-05 12:46:16,626 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-05 12:46:16,627 INFO L130 BoogieDeclarations]: Found specification of procedure glob2 [2019-09-05 12:46:16,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-05 12:46:16,627 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-05 12:46:16,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-05 12:46:16,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-05 12:46:16,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-05 12:46:16,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-05 12:46:16,628 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-05 12:46:16,880 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-05 12:46:16,880 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-05 12:46:16,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 12:46:16 BoogieIcfgContainer [2019-09-05 12:46:16,882 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-05 12:46:16,882 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-05 12:46:16,883 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-05 12:46:16,885 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-05 12:46:16,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.09 12:46:16" (1/3) ... [2019-09-05 12:46:16,886 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a21b2e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 12:46:16, skipping insertion in model container [2019-09-05 12:46:16,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:16" (2/3) ... [2019-09-05 12:46:16,887 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a21b2e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 12:46:16, skipping insertion in model container [2019-09-05 12:46:16,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 12:46:16" (3/3) ... [2019-09-05 12:46:16,889 INFO L109 eAbstractionObserver]: Analyzing ICFG verisec_NetBSD-libc_loop.i [2019-09-05 12:46:16,897 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-05 12:46:16,902 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-05 12:46:16,917 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-05 12:46:16,944 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-05 12:46:16,944 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-05 12:46:16,945 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-05 12:46:16,945 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-05 12:46:16,945 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-05 12:46:16,945 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-05 12:46:16,945 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-05 12:46:16,945 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-05 12:46:16,957 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2019-09-05 12:46:16,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-05 12:46:16,965 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:46:16,966 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:46:16,968 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:46:16,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:46:16,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1626450083, now seen corresponding path program 1 times [2019-09-05 12:46:16,974 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 12:46:17,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:46:17,017 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:46:17,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:46:17,018 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 12:46:17,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:46:17,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:46:17,284 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-05 12:46:17,284 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-09-05 12:46:17,284 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-05 12:46:17,289 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-05 12:46:17,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-05 12:46:17,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-09-05 12:46:17,302 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 7 states. [2019-09-05 12:46:17,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:46:17,475 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2019-09-05 12:46:17,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-05 12:46:17,477 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2019-09-05 12:46:17,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:46:17,486 INFO L225 Difference]: With dead ends: 37 [2019-09-05 12:46:17,487 INFO L226 Difference]: Without dead ends: 26 [2019-09-05 12:46:17,489 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-09-05 12:46:17,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-09-05 12:46:17,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2019-09-05 12:46:17,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-09-05 12:46:17,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2019-09-05 12:46:17,529 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 13 [2019-09-05 12:46:17,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:46:17,529 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2019-09-05 12:46:17,529 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-05 12:46:17,530 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2019-09-05 12:46:17,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-09-05 12:46:17,531 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:46:17,531 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:46:17,532 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:46:17,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:46:17,532 INFO L82 PathProgramCache]: Analyzing trace with hash -519824651, now seen corresponding path program 1 times [2019-09-05 12:46:17,532 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 12:46:17,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:46:17,534 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:46:17,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:46:17,534 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 12:46:17,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:46:17,720 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:46:17,720 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:46:17,720 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-05 12:46:17,722 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 22 with the following transitions: [2019-09-05 12:46:17,724 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [10], [12], [14], [23], [27], [30], [32], [35], [37], [38], [39], [40], [41], [42], [44] [2019-09-05 12:46:17,769 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-05 12:46:17,769 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-05 12:46:17,858 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-05 12:46:17,860 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 21 root evaluator evaluations with a maximum evaluation depth of 0. Performed 21 inverse root evaluator evaluations with a maximum inverse evaluation depth of 0. Never found a fixpoint. Largest state had 20 variables. [2019-09-05 12:46:17,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:46:17,864 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-05 12:46:17,897 INFO L227 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 100% of their original sizes. [2019-09-05 12:46:17,898 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-05 12:46:17,900 INFO L420 sIntCurrentIteration]: We unified 20 AI predicates to 20 [2019-09-05 12:46:17,900 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-05 12:46:17,901 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:46:17,901 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 8 [2019-09-05 12:46:17,901 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-05 12:46:17,903 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-05 12:46:17,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-05 12:46:17,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-05 12:46:17,904 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 2 states. [2019-09-05 12:46:17,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:46:17,904 INFO L93 Difference]: Finished difference Result 6 states and 5 transitions. [2019-09-05 12:46:17,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-05 12:46:17,905 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2019-09-05 12:46:17,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:46:17,905 INFO L225 Difference]: With dead ends: 6 [2019-09-05 12:46:17,906 INFO L226 Difference]: Without dead ends: 0 [2019-09-05 12:46:17,906 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-05 12:46:17,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-05 12:46:17,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-05 12:46:17,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-05 12:46:17,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-05 12:46:17,908 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2019-09-05 12:46:17,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:46:17,908 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-05 12:46:17,910 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-05 12:46:17,910 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-05 12:46:17,911 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-05 12:46:17,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.09 12:46:17 BoogieIcfgContainer [2019-09-05 12:46:17,917 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-05 12:46:17,920 INFO L168 Benchmark]: Toolchain (without parser) took 1776.15 ms. Allocated memory was 133.7 MB in the beginning and 199.2 MB in the end (delta: 65.5 MB). Free memory was 89.8 MB in the beginning and 99.1 MB in the end (delta: -9.3 MB). Peak memory consumption was 56.2 MB. Max. memory is 7.1 GB. [2019-09-05 12:46:17,922 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 133.7 MB. Free memory was 108.0 MB in the beginning and 107.8 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-05 12:46:17,924 INFO L168 Benchmark]: CACSL2BoogieTranslator took 379.45 ms. Allocated memory was 133.7 MB in the beginning and 199.2 MB in the end (delta: 65.5 MB). Free memory was 89.6 MB in the beginning and 176.0 MB in the end (delta: -86.4 MB). Peak memory consumption was 25.0 MB. Max. memory is 7.1 GB. [2019-09-05 12:46:17,926 INFO L168 Benchmark]: Boogie Preprocessor took 42.00 ms. Allocated memory is still 199.2 MB. Free memory was 176.0 MB in the beginning and 173.8 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2019-09-05 12:46:17,927 INFO L168 Benchmark]: RCFGBuilder took 316.23 ms. Allocated memory is still 199.2 MB. Free memory was 173.8 MB in the beginning and 159.7 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2019-09-05 12:46:17,929 INFO L168 Benchmark]: TraceAbstraction took 1034.29 ms. Allocated memory is still 199.2 MB. Free memory was 159.7 MB in the beginning and 99.1 MB in the end (delta: 60.6 MB). Peak memory consumption was 60.6 MB. Max. memory is 7.1 GB. [2019-09-05 12:46:17,940 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 133.7 MB. Free memory was 108.0 MB in the beginning and 107.8 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 379.45 ms. Allocated memory was 133.7 MB in the beginning and 199.2 MB in the end (delta: 65.5 MB). Free memory was 89.6 MB in the beginning and 176.0 MB in the end (delta: -86.4 MB). Peak memory consumption was 25.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 42.00 ms. Allocated memory is still 199.2 MB. Free memory was 176.0 MB in the beginning and 173.8 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 316.23 ms. Allocated memory is still 199.2 MB. Free memory was 173.8 MB in the beginning and 159.7 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1034.29 ms. Allocated memory is still 199.2 MB. Free memory was 159.7 MB in the beginning and 99.1 MB in the end (delta: 60.6 MB). Peak memory consumption was 60.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 26 locations, 1 error locations. SAFE Result, 0.9s OverallTime, 2 OverallIterations, 2 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 22 SDtfs, 22 SDslu, 66 SDs, 0 SdLazy, 63 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 1 AbstIntStrong, 0.9625 AbsIntWeakeningRatio, 1.3 AbsIntAvgWeakeningVarsNumRemoved, 0.8 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 34 NumberOfCodeBlocks, 34 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 32 ConstructedInterpolants, 0 QuantifiedInterpolants, 2552 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 1 PerfectInterpolantSequences, 2/4 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...