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-c6af20d [2019-09-03 20:37:05,093 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-03 20:37:05,095 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-03 20:37:05,108 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-03 20:37:05,108 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-03 20:37:05,109 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-03 20:37:05,111 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-03 20:37:05,112 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-03 20:37:05,114 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-03 20:37:05,115 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-03 20:37:05,116 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-03 20:37:05,117 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-03 20:37:05,118 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-03 20:37:05,119 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-03 20:37:05,120 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-03 20:37:05,121 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-03 20:37:05,122 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-03 20:37:05,123 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-03 20:37:05,125 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-03 20:37:05,126 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-03 20:37:05,128 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-03 20:37:05,129 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-03 20:37:05,130 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-03 20:37:05,131 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-03 20:37:05,133 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-03 20:37:05,136 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-03 20:37:05,137 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-03 20:37:05,137 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-03 20:37:05,138 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-03 20:37:05,139 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-03 20:37:05,140 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-03 20:37:05,140 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-03 20:37:05,140 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-03 20:37:05,141 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-03 20:37:05,142 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-03 20:37:05,142 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-03 20:37:05,143 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 [2019-09-03 20:37:05,158 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-03 20:37:05,158 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-03 20:37:05,159 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-03 20:37:05,159 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-03 20:37:05,160 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-03 20:37:05,160 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-03 20:37:05,160 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-03 20:37:05,160 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-03 20:37:05,160 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-03 20:37:05,161 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-03 20:37:05,161 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-03 20:37:05,161 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-03 20:37:05,162 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-03 20:37:05,162 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-03 20:37:05,162 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-03 20:37:05,162 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-03 20:37:05,162 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-03 20:37:05,163 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-03 20:37:05,163 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-03 20:37:05,163 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-03 20:37:05,163 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-03 20:37:05,163 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-03 20:37:05,164 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-03 20:37:05,164 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 20:37:05,164 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-03 20:37:05,164 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-03 20:37:05,164 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-03 20:37:05,165 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-03 20:37:05,165 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-03 20:37:05,165 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-03 20:37:05,217 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-03 20:37:05,232 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-03 20:37:05,237 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-03 20:37:05,239 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-03 20:37:05,240 INFO L275 PluginConnector]: CDTParser initialized [2019-09-03 20:37:05,241 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/verisec_NetBSD-libc_loop.i [2019-09-03 20:37:05,310 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f7ee5bb7/5fe0cceb080b4e4b8c5f31bee359c552/FLAG3d19dfb60 [2019-09-03 20:37:05,709 INFO L306 CDTParser]: Found 1 translation units. [2019-09-03 20:37:05,710 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/verisec_NetBSD-libc_loop.i [2019-09-03 20:37:05,716 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f7ee5bb7/5fe0cceb080b4e4b8c5f31bee359c552/FLAG3d19dfb60 [2019-09-03 20:37:06,078 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f7ee5bb7/5fe0cceb080b4e4b8c5f31bee359c552 [2019-09-03 20:37:06,090 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-03 20:37:06,091 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-03 20:37:06,094 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-03 20:37:06,094 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-03 20:37:06,098 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-03 20:37:06,099 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 08:37:06" (1/1) ... [2019-09-03 20:37:06,102 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27f10b56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:37:06, skipping insertion in model container [2019-09-03 20:37:06,102 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 08:37:06" (1/1) ... [2019-09-03 20:37:06,110 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-03 20:37:06,127 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-03 20:37:06,318 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 20:37:06,329 INFO L188 MainTranslator]: Completed pre-run [2019-09-03 20:37:06,345 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 20:37:06,446 INFO L192 MainTranslator]: Completed translation [2019-09-03 20:37:06,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:37:06 WrapperNode [2019-09-03 20:37:06,446 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-03 20:37:06,447 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-03 20:37:06,447 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-03 20:37:06,447 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-03 20:37:06,457 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:37:06" (1/1) ... [2019-09-03 20:37:06,457 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:37:06" (1/1) ... [2019-09-03 20:37:06,464 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:37:06" (1/1) ... [2019-09-03 20:37:06,465 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:37:06" (1/1) ... [2019-09-03 20:37:06,472 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:37:06" (1/1) ... [2019-09-03 20:37:06,476 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:37:06" (1/1) ... [2019-09-03 20:37:06,477 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:37:06" (1/1) ... [2019-09-03 20:37:06,479 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-03 20:37:06,480 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-03 20:37:06,480 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-03 20:37:06,480 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-03 20:37:06,481 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:37:06" (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 [2019-09-03 20:37:06,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-03 20:37:06,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-03 20:37:06,537 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-03 20:37:06,537 INFO L138 BoogieDeclarations]: Found implementation of procedure glob2 [2019-09-03 20:37:06,537 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-03 20:37:06,537 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-03 20:37:06,538 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-03 20:37:06,538 INFO L130 BoogieDeclarations]: Found specification of procedure glob2 [2019-09-03 20:37:06,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-03 20:37:06,539 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-03 20:37:06,539 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-03 20:37:06,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-03 20:37:06,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-03 20:37:06,541 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-03 20:37:06,541 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-03 20:37:06,788 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-03 20:37:06,789 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-03 20:37:06,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 08:37:06 BoogieIcfgContainer [2019-09-03 20:37:06,790 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-03 20:37:06,791 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-03 20:37:06,792 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-03 20:37:06,795 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-03 20:37:06,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.09 08:37:06" (1/3) ... [2019-09-03 20:37:06,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31becd19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 08:37:06, skipping insertion in model container [2019-09-03 20:37:06,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:37:06" (2/3) ... [2019-09-03 20:37:06,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31becd19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 08:37:06, skipping insertion in model container [2019-09-03 20:37:06,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 08:37:06" (3/3) ... [2019-09-03 20:37:06,803 INFO L109 eAbstractionObserver]: Analyzing ICFG verisec_NetBSD-libc_loop.i [2019-09-03 20:37:06,812 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-03 20:37:06,833 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-03 20:37:06,849 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-03 20:37:06,876 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-03 20:37:06,876 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-03 20:37:06,877 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-03 20:37:06,877 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-03 20:37:06,877 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-03 20:37:06,877 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-03 20:37:06,877 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-03 20:37:06,877 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-03 20:37:06,889 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2019-09-03 20:37:06,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-03 20:37:06,897 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:37:06,898 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:37:06,900 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:37:06,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:37:06,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1626450083, now seen corresponding path program 1 times [2019-09-03 20:37:06,906 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:37:06,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:37:06,949 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:37:06,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:37:06,949 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:37:07,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:37:07,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:37:07,204 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:37:07,204 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-09-03 20:37:07,205 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 20:37:07,209 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-03 20:37:07,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-03 20:37:07,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-09-03 20:37:07,228 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 7 states. [2019-09-03 20:37:07,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:37:07,401 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2019-09-03 20:37:07,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-03 20:37:07,404 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2019-09-03 20:37:07,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:37:07,414 INFO L225 Difference]: With dead ends: 37 [2019-09-03 20:37:07,414 INFO L226 Difference]: Without dead ends: 26 [2019-09-03 20:37:07,416 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 [2019-09-03 20:37:07,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-09-03 20:37:07,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2019-09-03 20:37:07,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-09-03 20:37:07,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2019-09-03 20:37:07,458 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 13 [2019-09-03 20:37:07,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:37:07,459 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2019-09-03 20:37:07,459 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-03 20:37:07,459 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2019-09-03 20:37:07,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-09-03 20:37:07,460 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:37:07,461 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:37:07,461 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:37:07,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:37:07,462 INFO L82 PathProgramCache]: Analyzing trace with hash -519824651, now seen corresponding path program 1 times [2019-09-03 20:37:07,462 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:37:07,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:37:07,463 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:37:07,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:37:07,464 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:37:07,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:37:07,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:37:07,635 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:37:07,639 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-03 20:37:07,640 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 22 with the following transitions: [2019-09-03 20:37:07,643 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [10], [12], [14], [23], [27], [30], [32], [35], [37], [38], [39], [40], [41], [42], [44] [2019-09-03 20:37:07,692 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-03 20:37:07,692 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-03 20:37:07,750 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-03 20:37:07,752 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. [2019-09-03 20:37:07,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:37:07,756 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-03 20:37:07,795 INFO L227 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 100% of their original sizes. [2019-09-03 20:37:07,795 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-03 20:37:07,797 INFO L420 sIntCurrentIteration]: We unified 20 AI predicates to 20 [2019-09-03 20:37:07,798 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-03 20:37:07,798 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:37:07,799 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 8 [2019-09-03 20:37:07,799 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 20:37:07,800 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-03 20:37:07,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-03 20:37:07,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-03 20:37:07,801 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 2 states. [2019-09-03 20:37:07,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:37:07,802 INFO L93 Difference]: Finished difference Result 6 states and 5 transitions. [2019-09-03 20:37:07,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-03 20:37:07,803 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2019-09-03 20:37:07,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:37:07,803 INFO L225 Difference]: With dead ends: 6 [2019-09-03 20:37:07,803 INFO L226 Difference]: Without dead ends: 0 [2019-09-03 20:37:07,804 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 [2019-09-03 20:37:07,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-03 20:37:07,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-03 20:37:07,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-03 20:37:07,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-03 20:37:07,806 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2019-09-03 20:37:07,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:37:07,806 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-03 20:37:07,806 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-03 20:37:07,806 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-03 20:37:07,807 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-03 20:37:07,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.09 08:37:07 BoogieIcfgContainer [2019-09-03 20:37:07,812 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-03 20:37:07,815 INFO L168 Benchmark]: Toolchain (without parser) took 1722.54 ms. Allocated memory was 135.8 MB in the beginning and 196.1 MB in the end (delta: 60.3 MB). Free memory was 82.8 MB in the beginning and 97.3 MB in the end (delta: -14.5 MB). Peak memory consumption was 45.8 MB. Max. memory is 7.1 GB. [2019-09-03 20:37:07,816 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 135.8 MB. Free memory was 101.9 MB in the beginning and 101.6 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-03 20:37:07,817 INFO L168 Benchmark]: CACSL2BoogieTranslator took 352.52 ms. Allocated memory was 135.8 MB in the beginning and 196.1 MB in the end (delta: 60.3 MB). Free memory was 82.6 MB in the beginning and 174.5 MB in the end (delta: -91.9 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. [2019-09-03 20:37:07,821 INFO L168 Benchmark]: Boogie Preprocessor took 32.44 ms. Allocated memory is still 196.1 MB. Free memory was 174.5 MB in the beginning and 172.1 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2019-09-03 20:37:07,822 INFO L168 Benchmark]: RCFGBuilder took 310.81 ms. Allocated memory is still 196.1 MB. Free memory was 172.1 MB in the beginning and 158.0 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2019-09-03 20:37:07,824 INFO L168 Benchmark]: TraceAbstraction took 1020.54 ms. Allocated memory is still 196.1 MB. Free memory was 157.4 MB in the beginning and 97.3 MB in the end (delta: 60.1 MB). Peak memory consumption was 60.1 MB. Max. memory is 7.1 GB. [2019-09-03 20:37:07,835 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 135.8 MB. Free memory was 101.9 MB in the beginning and 101.6 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 352.52 ms. Allocated memory was 135.8 MB in the beginning and 196.1 MB in the end (delta: 60.3 MB). Free memory was 82.6 MB in the beginning and 174.5 MB in the end (delta: -91.9 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 32.44 ms. Allocated memory is still 196.1 MB. Free memory was 174.5 MB in the beginning and 172.1 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 310.81 ms. Allocated memory is still 196.1 MB. Free memory was 172.1 MB in the beginning and 158.0 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1020.54 ms. Allocated memory is still 196.1 MB. Free memory was 157.4 MB in the beginning and 97.3 MB in the end (delta: 60.1 MB). Peak memory consumption was 60.1 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...