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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/nec20.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:16:40,986 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:16:40,989 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:16:41,004 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:16:41,005 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:16:41,007 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:16:41,009 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:16:41,022 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:16:41,024 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:16:41,025 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:16:41,027 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:16:41,029 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:16:41,029 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:16:41,033 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:16:41,035 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:16:41,037 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:16:41,039 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:16:41,042 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:16:41,043 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:16:41,048 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:16:41,053 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:16:41,056 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:16:41,057 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:16:41,058 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:16:41,060 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 23:16:41,060 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 23:16:41,060 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 23:16:41,061 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 23:16:41,062 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 23:16:41,062 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 23:16:41,063 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:16:41,063 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:16:41,064 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:16:41,065 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:16:41,066 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:16:41,066 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:16:41,067 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:16:41,067 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:16:41,067 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:16:41,068 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:16:41,069 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:16:41,069 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 23:16:41,083 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:16:41,084 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:16:41,085 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:16:41,085 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:16:41,085 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:16:41,085 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:16:41,086 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:16:41,086 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:16:41,086 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:16:41,086 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:16:41,086 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:16:41,087 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:16:41,087 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:16:41,087 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:16:41,087 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:16:41,087 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:16:41,088 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:16:41,088 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:16:41,088 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:16:41,088 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:16:41,089 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:16:41,089 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:16:41,089 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:16:41,089 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:16:41,089 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:16:41,090 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:16:41,090 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:16:41,090 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:16:41,090 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:16:41,370 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:16:41,389 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:16:41,393 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:16:41,395 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:16:41,395 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:16:41,396 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/nec20.c [2019-10-14 23:16:41,472 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36fd0f49a/ba3fe2367faf430d8acb64769fb337a9/FLAG038daf43e [2019-10-14 23:16:41,916 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:16:41,918 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/nec20.c [2019-10-14 23:16:41,925 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36fd0f49a/ba3fe2367faf430d8acb64769fb337a9/FLAG038daf43e [2019-10-14 23:16:42,274 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36fd0f49a/ba3fe2367faf430d8acb64769fb337a9 [2019-10-14 23:16:42,285 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:16:42,287 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:16:42,288 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:16:42,288 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:16:42,292 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:16:42,293 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:16:42" (1/1) ... [2019-10-14 23:16:42,296 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28330ebf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:42, skipping insertion in model container [2019-10-14 23:16:42,296 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:16:42" (1/1) ... [2019-10-14 23:16:42,304 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:16:42,325 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:16:42,522 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:16:42,527 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:16:42,546 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:16:42,564 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:16:42,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:42 WrapperNode [2019-10-14 23:16:42,565 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:16:42,566 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:16:42,566 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:16:42,566 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:16:42,659 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:42" (1/1) ... [2019-10-14 23:16:42,660 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:42" (1/1) ... [2019-10-14 23:16:42,664 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:42" (1/1) ... [2019-10-14 23:16:42,664 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:42" (1/1) ... [2019-10-14 23:16:42,668 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:42" (1/1) ... [2019-10-14 23:16:42,674 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:42" (1/1) ... [2019-10-14 23:16:42,676 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:42" (1/1) ... [2019-10-14 23:16:42,678 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:16:42,679 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:16:42,679 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:16:42,679 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:16:42,680 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:42" (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 [2019-10-14 23:16:42,731 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:16:42,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:16:42,732 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 23:16:42,732 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:16:42,732 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:16:42,732 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-10-14 23:16:42,733 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 23:16:42,733 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2019-10-14 23:16:42,733 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:16:42,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:16:42,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:16:42,941 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:16:42,942 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:16:42,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:16:42 BoogieIcfgContainer [2019-10-14 23:16:42,943 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:16:42,944 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:16:42,944 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:16:42,948 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:16:42,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:16:42" (1/3) ... [2019-10-14 23:16:42,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e4e5893 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:16:42, skipping insertion in model container [2019-10-14 23:16:42,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:42" (2/3) ... [2019-10-14 23:16:42,950 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e4e5893 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:16:42, skipping insertion in model container [2019-10-14 23:16:42,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:16:42" (3/3) ... [2019-10-14 23:16:42,952 INFO L109 eAbstractionObserver]: Analyzing ICFG nec20.c [2019-10-14 23:16:42,961 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:16:42,969 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:16:42,981 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:16:43,026 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:16:43,027 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:16:43,027 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:16:43,027 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:16:43,027 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:16:43,028 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:16:43,028 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:16:43,028 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:16:43,056 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2019-10-14 23:16:43,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-14 23:16:43,070 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:43,071 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:43,073 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:43,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:43,080 INFO L82 PathProgramCache]: Analyzing trace with hash -676339564, now seen corresponding path program 1 times [2019-10-14 23:16:43,090 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:43,090 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656598183] [2019-10-14 23:16:43,091 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:43,091 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:43,091 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:43,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:43,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:43,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:43,336 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656598183] [2019-10-14 23:16:43,337 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:16:43,337 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:16:43,338 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123842538] [2019-10-14 23:16:43,342 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:16:43,343 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:43,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:16:43,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:16:43,356 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 4 states. [2019-10-14 23:16:43,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:43,513 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2019-10-14 23:16:43,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:16:43,516 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-10-14 23:16:43,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:43,527 INFO L225 Difference]: With dead ends: 43 [2019-10-14 23:16:43,528 INFO L226 Difference]: Without dead ends: 17 [2019-10-14 23:16:43,531 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:16:43,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-10-14 23:16:43,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-10-14 23:16:43,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-14 23:16:43,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-10-14 23:16:43,567 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2019-10-14 23:16:43,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:43,568 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-10-14 23:16:43,568 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:16:43,568 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-10-14 23:16:43,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-14 23:16:43,569 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:43,569 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:43,570 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:43,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:43,570 INFO L82 PathProgramCache]: Analyzing trace with hash 2087974871, now seen corresponding path program 1 times [2019-10-14 23:16:43,571 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:43,571 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849791526] [2019-10-14 23:16:43,571 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:43,572 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:43,572 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:43,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-14 23:16:43,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-14 23:16:43,692 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-14 23:16:43,693 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-14 23:16:43,733 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 11:16:43 BoogieIcfgContainer [2019-10-14 23:16:43,733 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-14 23:16:43,738 INFO L168 Benchmark]: Toolchain (without parser) took 1448.70 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 103.5 MB in the beginning and 134.2 MB in the end (delta: -30.7 MB). Peak memory consumption was 33.3 MB. Max. memory is 7.1 GB. [2019-10-14 23:16:43,739 INFO L168 Benchmark]: CDTParser took 0.52 ms. Allocated memory is still 138.9 MB. Free memory is still 121.8 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-10-14 23:16:43,741 INFO L168 Benchmark]: CACSL2BoogieTranslator took 277.58 ms. Allocated memory is still 138.9 MB. Free memory was 103.5 MB in the beginning and 93.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2019-10-14 23:16:43,744 INFO L168 Benchmark]: Boogie Preprocessor took 112.81 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 93.9 MB in the beginning and 181.6 MB in the end (delta: -87.8 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. [2019-10-14 23:16:43,745 INFO L168 Benchmark]: RCFGBuilder took 264.24 ms. Allocated memory is still 202.9 MB. Free memory was 180.7 MB in the beginning and 168.5 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2019-10-14 23:16:43,747 INFO L168 Benchmark]: TraceAbstraction took 789.03 ms. Allocated memory is still 202.9 MB. Free memory was 168.5 MB in the beginning and 134.2 MB in the end (delta: 34.3 MB). Peak memory consumption was 34.3 MB. Max. memory is 7.1 GB. [2019-10-14 23:16:43,758 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.52 ms. Allocated memory is still 138.9 MB. Free memory is still 121.8 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 277.58 ms. Allocated memory is still 138.9 MB. Free memory was 103.5 MB in the beginning and 93.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 112.81 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 93.9 MB in the beginning and 181.6 MB in the end (delta: -87.8 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 264.24 ms. Allocated memory is still 202.9 MB. Free memory was 180.7 MB in the beginning and 168.5 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 789.03 ms. Allocated memory is still 202.9 MB. Free memory was 168.5 MB in the beginning and 134.2 MB in the end (delta: 34.3 MB). Peak memory consumption was 34.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int b; VAL [\old(b)=258, b=0] [L13] _Bool k=__VERIFIER_nondet_bool(); [L14] unsigned int i,n,j; [L15] int a[1025]; VAL [b=0, k=1] [L17] COND TRUE \read(k) [L18] n=0 VAL [b=0, k=1, n=0] [L23] i=0 [L24] j=__VERIFIER_nondet_uint() [L25] COND FALSE !(j > 10000) VAL [b=0, i=0, j=-4294966273, k=1, n=0] [L28] COND TRUE i <= n [L29] i++ [L30] j= j +2 VAL [b=0, i=1, j=-4294966271, k=1, n=0] [L28] COND FALSE !(i <= n) VAL [b=0, i=1, j=-4294966271, k=1, n=0] [L33] a[i]=0 VAL [b=0, i=1, j=-4294966271, k=1, n=0] [L34] CALL __VERIFIER_assert(j<1025) VAL [\old(cond)=0, b=0] [L5] COND TRUE !(cond) VAL [\old(cond)=0, b=0, cond=0] [L6] __VERIFIER_error() VAL [\old(cond)=0, b=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 1 error locations. Result: UNSAFE, OverallTime: 0.7s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 23 SDtfs, 22 SDslu, 11 SDs, 0 SdLazy, 24 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=0, 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 31 NumberOfCodeBlocks, 31 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 14 ConstructedInterpolants, 0 QuantifiedInterpolants, 504 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...