/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.8 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/array-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 02:04:50,115 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 02:04:50,118 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 02:04:50,159 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 02:04:50,160 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 02:04:50,169 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 02:04:50,172 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 02:04:50,175 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 02:04:50,178 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 02:04:50,181 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 02:04:50,182 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 02:04:50,183 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 02:04:50,183 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 02:04:50,186 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 02:04:50,188 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 02:04:50,189 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 02:04:50,191 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 02:04:50,192 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 02:04:50,194 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 02:04:50,202 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 02:04:50,205 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 02:04:50,205 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 02:04:50,206 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 02:04:50,207 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 02:04:50,219 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 02:04:50,237 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 02:04:50,238 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 02:04:50,238 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 02:04:50,239 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-19 02:04:50,277 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 02:04:50,278 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 02:04:50,279 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 02:04:50,280 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 02:04:50,280 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 02:04:50,280 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 02:04:50,280 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 02:04:50,281 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 02:04:50,281 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 02:04:50,281 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 02:04:50,282 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 02:04:50,282 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 02:04:50,282 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 02:04:50,283 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 02:04:50,283 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 02:04:50,283 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 02:04:50,283 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 02:04:50,284 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 02:04:50,284 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 02:04:50,284 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 02:04:50,284 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 02:04:50,284 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 02:04:50,285 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 02:04:50,285 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 02:04:50,285 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 02:04:50,285 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 02:04:50,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 02:04:50,286 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 02:04:50,286 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 02:04:50,286 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8; [2020-08-19 02:04:50,611 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 02:04:50,623 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 02:04:50,627 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 02:04:50,628 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 02:04:50,629 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 02:04:50,629 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/array-2.c [2020-08-19 02:04:50,691 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/18bfdc6a9/ba64843395374d9fa1fd65be4ca04bcc/FLAG47ed9b865 [2020-08-19 02:04:51,154 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 02:04:51,155 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/array-2.c [2020-08-19 02:04:51,162 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/18bfdc6a9/ba64843395374d9fa1fd65be4ca04bcc/FLAG47ed9b865 [2020-08-19 02:04:51,540 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/18bfdc6a9/ba64843395374d9fa1fd65be4ca04bcc [2020-08-19 02:04:51,551 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 02:04:51,553 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 02:04:51,554 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 02:04:51,555 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 02:04:51,558 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 02:04:51,560 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 02:04:51" (1/1) ... [2020-08-19 02:04:51,562 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7636aefb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:04:51, skipping insertion in model container [2020-08-19 02:04:51,563 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 02:04:51" (1/1) ... [2020-08-19 02:04:51,571 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 02:04:51,589 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 02:04:51,843 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 02:04:51,851 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 02:04:51,887 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 02:04:51,995 INFO L208 MainTranslator]: Completed translation [2020-08-19 02:04:51,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:04:51 WrapperNode [2020-08-19 02:04:51,996 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 02:04:51,997 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 02:04:51,997 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 02:04:51,997 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 02:04:52,012 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:04:51" (1/1) ... [2020-08-19 02:04:52,014 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:04:51" (1/1) ... [2020-08-19 02:04:52,024 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:04:51" (1/1) ... [2020-08-19 02:04:52,024 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:04:51" (1/1) ... [2020-08-19 02:04:52,037 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:04:51" (1/1) ... [2020-08-19 02:04:52,041 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:04:51" (1/1) ... [2020-08-19 02:04:52,043 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:04:51" (1/1) ... [2020-08-19 02:04:52,045 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 02:04:52,045 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 02:04:52,045 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 02:04:52,046 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 02:04:52,046 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:04:51" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 02:04:52,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 02:04:52,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 02:04:52,105 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-19 02:04:52,105 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 02:04:52,106 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 02:04:52,106 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-19 02:04:52,106 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 02:04:52,106 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 02:04:52,106 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-19 02:04:52,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-19 02:04:52,107 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-19 02:04:52,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-19 02:04:52,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 02:04:52,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 02:04:52,319 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 02:04:52,319 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-19 02:04:52,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 02:04:52 BoogieIcfgContainer [2020-08-19 02:04:52,323 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 02:04:52,326 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 02:04:52,326 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 02:04:52,330 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 02:04:52,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 02:04:51" (1/3) ... [2020-08-19 02:04:52,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55569bc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 02:04:52, skipping insertion in model container [2020-08-19 02:04:52,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:04:51" (2/3) ... [2020-08-19 02:04:52,332 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55569bc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 02:04:52, skipping insertion in model container [2020-08-19 02:04:52,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 02:04:52" (3/3) ... [2020-08-19 02:04:52,334 INFO L109 eAbstractionObserver]: Analyzing ICFG array-2.c [2020-08-19 02:04:52,347 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 02:04:52,366 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 02:04:52,398 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 02:04:52,452 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 02:04:52,452 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 02:04:52,452 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 02:04:52,453 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 02:04:52,453 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 02:04:52,453 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 02:04:52,453 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 02:04:52,453 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 02:04:52,470 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-08-19 02:04:52,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-19 02:04:52,476 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:04:52,477 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:04:52,477 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:04:52,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:04:52,482 INFO L82 PathProgramCache]: Analyzing trace with hash 202253298, now seen corresponding path program 1 times [2020-08-19 02:04:52,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:04:52,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1586401971] [2020-08-19 02:04:52,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:04:52,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:04:52,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:04:52,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:04:52,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:04:52,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1586401971] [2020-08-19 02:04:52,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:04:52,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:04:52,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901023] [2020-08-19 02:04:52,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:04:52,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:04:52,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:04:52,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:04:52,701 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2020-08-19 02:04:52,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:04:52,793 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2020-08-19 02:04:52,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:04:52,795 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-08-19 02:04:52,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:04:52,807 INFO L225 Difference]: With dead ends: 35 [2020-08-19 02:04:52,808 INFO L226 Difference]: Without dead ends: 15 [2020-08-19 02:04:52,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:04:52,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-08-19 02:04:52,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-08-19 02:04:52,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-08-19 02:04:52,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-08-19 02:04:52,847 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2020-08-19 02:04:52,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:04:52,848 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-08-19 02:04:52,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:04:52,848 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-08-19 02:04:52,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-19 02:04:52,849 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:04:52,850 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:04:52,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 02:04:52,850 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:04:52,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:04:52,851 INFO L82 PathProgramCache]: Analyzing trace with hash -112667363, now seen corresponding path program 1 times [2020-08-19 02:04:52,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:04:52,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [420625599] [2020-08-19 02:04:52,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:04:52,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:04:52,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:04:52,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:04:52,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:04:53,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [420625599] [2020-08-19 02:04:53,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:04:53,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 02:04:53,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418787905] [2020-08-19 02:04:53,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 02:04:53,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:04:53,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 02:04:53,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 02:04:53,004 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 4 states. [2020-08-19 02:04:53,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:04:53,065 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-08-19 02:04:53,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-19 02:04:53,065 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-08-19 02:04:53,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:04:53,067 INFO L225 Difference]: With dead ends: 24 [2020-08-19 02:04:53,067 INFO L226 Difference]: Without dead ends: 18 [2020-08-19 02:04:53,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 02:04:53,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-19 02:04:53,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2020-08-19 02:04:53,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-08-19 02:04:53,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-08-19 02:04:53,075 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2020-08-19 02:04:53,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:04:53,075 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-08-19 02:04:53,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 02:04:53,076 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-08-19 02:04:53,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-19 02:04:53,077 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:04:53,077 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:04:53,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 02:04:53,078 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:04:53,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:04:53,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1912057964, now seen corresponding path program 1 times [2020-08-19 02:04:53,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:04:53,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [129392223] [2020-08-19 02:04:53,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:04:53,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-19 02:04:53,130 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-19 02:04:53,131 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-19 02:04:53,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 02:04:53,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 02:04:53 BoogieIcfgContainer [2020-08-19 02:04:53,152 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 02:04:53,155 INFO L168 Benchmark]: Toolchain (without parser) took 1601.01 ms. Allocated memory was 139.5 MB in the beginning and 200.8 MB in the end (delta: 61.3 MB). Free memory was 101.0 MB in the beginning and 121.0 MB in the end (delta: -20.1 MB). Peak memory consumption was 41.3 MB. Max. memory is 7.1 GB. [2020-08-19 02:04:53,156 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 139.5 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-19 02:04:53,157 INFO L168 Benchmark]: CACSL2BoogieTranslator took 441.85 ms. Allocated memory was 139.5 MB in the beginning and 200.8 MB in the end (delta: 61.3 MB). Free memory was 100.8 MB in the beginning and 179.8 MB in the end (delta: -79.1 MB). Peak memory consumption was 21.8 MB. Max. memory is 7.1 GB. [2020-08-19 02:04:53,158 INFO L168 Benchmark]: Boogie Preprocessor took 48.19 ms. Allocated memory is still 200.8 MB. Free memory was 179.8 MB in the beginning and 177.5 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2020-08-19 02:04:53,159 INFO L168 Benchmark]: RCFGBuilder took 278.41 ms. Allocated memory is still 200.8 MB. Free memory was 177.5 MB in the beginning and 163.0 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. [2020-08-19 02:04:53,160 INFO L168 Benchmark]: TraceAbstraction took 826.52 ms. Allocated memory is still 200.8 MB. Free memory was 163.0 MB in the beginning and 121.0 MB in the end (delta: 42.0 MB). Peak memory consumption was 42.0 MB. Max. memory is 7.1 GB. [2020-08-19 02:04:53,164 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 139.5 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 441.85 ms. Allocated memory was 139.5 MB in the beginning and 200.8 MB in the end (delta: 61.3 MB). Free memory was 100.8 MB in the beginning and 179.8 MB in the end (delta: -79.1 MB). Peak memory consumption was 21.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 48.19 ms. Allocated memory is still 200.8 MB. Free memory was 179.8 MB in the beginning and 177.5 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 278.41 ms. Allocated memory is still 200.8 MB. Free memory was 177.5 MB in the beginning and 163.0 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 826.52 ms. Allocated memory is still 200.8 MB. Free memory was 163.0 MB in the beginning and 121.0 MB in the end (delta: 42.0 MB). Peak memory consumption was 42.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L13] unsigned int SIZE=1; [L14] unsigned int j,k; [L15] int array[SIZE], menor; [L17] menor = __VERIFIER_nondet_int() [L19] j=0 [L19] COND TRUE jmenor) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.6s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 32 SDtfs, 11 SDslu, 13 SDs, 0 SdLazy, 34 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred 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, 2 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 39 NumberOfCodeBlocks, 39 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 22 ConstructedInterpolants, 0 QuantifiedInterpolants, 561 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...