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-f4eb214f-m [2019-10-13 19:17:41,185 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 19:17:41,188 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 19:17:41,200 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 19:17:41,200 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 19:17:41,201 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 19:17:41,203 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 19:17:41,204 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 19:17:41,206 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 19:17:41,207 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 19:17:41,208 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 19:17:41,209 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 19:17:41,209 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 19:17:41,210 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 19:17:41,211 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 19:17:41,213 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 19:17:41,213 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 19:17:41,214 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 19:17:41,216 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 19:17:41,218 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 19:17:41,219 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 19:17:41,220 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 19:17:41,222 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 19:17:41,222 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 19:17:41,225 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 19:17:41,225 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 19:17:41,225 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 19:17:41,226 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 19:17:41,227 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 19:17:41,228 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 19:17:41,228 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 19:17:41,231 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 19:17:41,232 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 19:17:41,233 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 19:17:41,234 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 19:17:41,234 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 19:17:41,235 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 19:17:41,235 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 19:17:41,236 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 19:17:41,236 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 19:17:41,241 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 19:17:41,242 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 [2019-10-13 19:17:41,263 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 19:17:41,263 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 19:17:41,265 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 19:17:41,265 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 19:17:41,266 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 19:17:41,266 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 19:17:41,266 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 19:17:41,266 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 19:17:41,266 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 19:17:41,267 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 19:17:41,268 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 19:17:41,268 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 19:17:41,268 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 19:17:41,269 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 19:17:41,269 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 19:17:41,269 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 19:17:41,269 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 19:17:41,269 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 19:17:41,270 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 19:17:41,270 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 19:17:41,270 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 19:17:41,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 19:17:41,271 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 19:17:41,271 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 19:17:41,271 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 19:17:41,271 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 19:17:41,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 19:17:41,272 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 19:17:41,272 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 19:17:41,546 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 19:17:41,559 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 19:17:41,563 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 19:17:41,564 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 19:17:41,565 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 19:17:41,565 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/nec20.c [2019-10-13 19:17:41,635 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a748648a/d2bbddc8aba3426c8bc311a52c00a466/FLAG672e73a0f [2019-10-13 19:17:42,100 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 19:17:42,102 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/nec20.c [2019-10-13 19:17:42,109 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a748648a/d2bbddc8aba3426c8bc311a52c00a466/FLAG672e73a0f [2019-10-13 19:17:42,486 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a748648a/d2bbddc8aba3426c8bc311a52c00a466 [2019-10-13 19:17:42,498 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 19:17:42,500 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 19:17:42,501 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 19:17:42,501 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 19:17:42,504 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 19:17:42,505 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:17:42" (1/1) ... [2019-10-13 19:17:42,508 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@599a6431 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:42, skipping insertion in model container [2019-10-13 19:17:42,509 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:17:42" (1/1) ... [2019-10-13 19:17:42,515 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 19:17:42,532 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 19:17:42,718 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:17:42,722 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 19:17:42,752 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:17:42,767 INFO L192 MainTranslator]: Completed translation [2019-10-13 19:17:42,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:42 WrapperNode [2019-10-13 19:17:42,767 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 19:17:42,768 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 19:17:42,768 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 19:17:42,768 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 19:17:42,869 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:42" (1/1) ... [2019-10-13 19:17:42,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:42" (1/1) ... [2019-10-13 19:17:42,875 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:42" (1/1) ... [2019-10-13 19:17:42,875 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:42" (1/1) ... [2019-10-13 19:17:42,879 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:42" (1/1) ... [2019-10-13 19:17:42,888 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:42" (1/1) ... [2019-10-13 19:17:42,889 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:42" (1/1) ... [2019-10-13 19:17:42,890 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 19:17:42,891 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 19:17:42,891 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 19:17:42,891 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 19:17:42,892 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:42" (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 [2019-10-13 19:17:42,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 19:17:42,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 19:17:42,951 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 19:17:42,951 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 19:17:42,952 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 19:17:42,952 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-10-13 19:17:42,952 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 19:17:42,952 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2019-10-13 19:17:42,952 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 19:17:42,952 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 19:17:42,952 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 19:17:43,200 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 19:17:43,201 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 19:17:43,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:17:43 BoogieIcfgContainer [2019-10-13 19:17:43,203 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 19:17:43,212 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 19:17:43,212 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 19:17:43,219 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 19:17:43,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:17:42" (1/3) ... [2019-10-13 19:17:43,220 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ecf3af0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:17:43, skipping insertion in model container [2019-10-13 19:17:43,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:42" (2/3) ... [2019-10-13 19:17:43,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ecf3af0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:17:43, skipping insertion in model container [2019-10-13 19:17:43,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:17:43" (3/3) ... [2019-10-13 19:17:43,228 INFO L109 eAbstractionObserver]: Analyzing ICFG nec20.c [2019-10-13 19:17:43,251 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 19:17:43,260 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 19:17:43,282 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 19:17:43,310 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 19:17:43,310 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 19:17:43,311 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 19:17:43,311 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 19:17:43,311 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 19:17:43,311 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 19:17:43,311 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 19:17:43,312 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 19:17:43,331 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2019-10-13 19:17:43,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-13 19:17:43,336 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:43,337 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:43,338 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:43,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:43,344 INFO L82 PathProgramCache]: Analyzing trace with hash -676339564, now seen corresponding path program 1 times [2019-10-13 19:17:43,351 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:43,351 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120135833] [2019-10-13 19:17:43,351 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:43,351 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:43,352 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:43,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:43,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:43,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:43,584 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120135833] [2019-10-13 19:17:43,585 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:17:43,585 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:17:43,586 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306336627] [2019-10-13 19:17:43,590 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:17:43,591 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:43,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:17:43,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:17:43,608 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 4 states. [2019-10-13 19:17:43,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:43,749 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2019-10-13 19:17:43,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 19:17:43,751 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-10-13 19:17:43,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:43,758 INFO L225 Difference]: With dead ends: 43 [2019-10-13 19:17:43,758 INFO L226 Difference]: Without dead ends: 17 [2019-10-13 19:17:43,761 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 [2019-10-13 19:17:43,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-10-13 19:17:43,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-10-13 19:17:43,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-13 19:17:43,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-10-13 19:17:43,798 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2019-10-13 19:17:43,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:43,799 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-10-13 19:17:43,799 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:17:43,799 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-10-13 19:17:43,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-13 19:17:43,800 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:43,800 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:43,801 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:43,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:43,802 INFO L82 PathProgramCache]: Analyzing trace with hash 2087974871, now seen corresponding path program 1 times [2019-10-13 19:17:43,802 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:43,802 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510619286] [2019-10-13 19:17:43,803 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:43,803 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:43,803 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:43,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-13 19:17:43,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-13 19:17:43,890 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-13 19:17:43,890 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-13 19:17:43,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:17:43 BoogieIcfgContainer [2019-10-13 19:17:43,919 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-13 19:17:43,923 INFO L168 Benchmark]: Toolchain (without parser) took 1421.36 ms. Allocated memory was 146.3 MB in the beginning and 203.9 MB in the end (delta: 57.7 MB). Free memory was 104.1 MB in the beginning and 134.2 MB in the end (delta: -30.1 MB). Peak memory consumption was 27.6 MB. Max. memory is 7.1 GB. [2019-10-13 19:17:43,924 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 146.3 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-13 19:17:43,925 INFO L168 Benchmark]: CACSL2BoogieTranslator took 266.81 ms. Allocated memory is still 146.3 MB. Free memory was 103.9 MB in the beginning and 94.2 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2019-10-13 19:17:43,926 INFO L168 Benchmark]: Boogie Preprocessor took 122.66 ms. Allocated memory was 146.3 MB in the beginning and 203.9 MB in the end (delta: 57.7 MB). Free memory was 94.2 MB in the beginning and 182.2 MB in the end (delta: -88.0 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2019-10-13 19:17:43,927 INFO L168 Benchmark]: RCFGBuilder took 311.74 ms. Allocated memory is still 203.9 MB. Free memory was 182.2 MB in the beginning and 169.2 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2019-10-13 19:17:43,928 INFO L168 Benchmark]: TraceAbstraction took 707.59 ms. Allocated memory is still 203.9 MB. Free memory was 169.2 MB in the beginning and 134.2 MB in the end (delta: 35.0 MB). Peak memory consumption was 35.0 MB. Max. memory is 7.1 GB. [2019-10-13 19:17:43,932 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 146.3 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 266.81 ms. Allocated memory is still 146.3 MB. Free memory was 103.9 MB in the beginning and 94.2 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 122.66 ms. Allocated memory was 146.3 MB in the beginning and 203.9 MB in the end (delta: 57.7 MB). Free memory was 94.2 MB in the beginning and 182.2 MB in the end (delta: -88.0 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 311.74 ms. Allocated memory is still 203.9 MB. Free memory was 182.2 MB in the beginning and 169.2 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 707.59 ms. Allocated memory is still 203.9 MB. Free memory was 169.2 MB in the beginning and 134.2 MB in the end (delta: 35.0 MB). Peak memory consumption was 35.0 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: 0.6s, 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...