/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.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/array-fpi/condnf.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 23:09:11,809 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 23:09:11,813 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 23:09:11,838 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 23:09:11,839 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 23:09:11,840 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 23:09:11,841 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 23:09:11,843 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 23:09:11,845 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 23:09:11,846 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 23:09:11,847 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 23:09:11,848 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 23:09:11,849 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 23:09:11,850 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 23:09:11,851 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 23:09:11,852 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 23:09:11,853 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 23:09:11,854 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 23:09:11,856 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 23:09:11,858 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 23:09:11,859 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 23:09:11,860 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 23:09:11,862 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 23:09:11,863 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 23:09:11,865 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-04 23:09:11,866 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-04 23:09:11,866 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-04 23:09:11,867 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-04 23:09:11,867 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-04 23:09:11,871 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-04 23:09:11,872 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 23:09:11,872 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 23:09:11,873 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 23:09:11,874 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 23:09:11,875 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 23:09:11,875 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 23:09:11,876 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 23:09:11,876 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 23:09:11,876 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 23:09:11,877 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 23:09:11,878 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 23:09:11,879 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 23:09:11,908 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 23:09:11,912 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 23:09:11,913 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 23:09:11,914 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 23:09:11,914 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 23:09:11,914 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 23:09:11,914 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 23:09:11,914 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 23:09:11,915 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 23:09:11,918 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 23:09:11,918 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 23:09:11,918 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 23:09:11,919 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 23:09:11,919 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 23:09:11,919 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 23:09:11,919 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 23:09:11,919 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 23:09:11,920 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 23:09:11,920 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 23:09:11,920 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 23:09:11,920 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 23:09:11,920 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 23:09:11,921 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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: Use separate solver for trace checks -> true [2020-09-04 23:09:12,382 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 23:09:12,400 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 23:09:12,405 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 23:09:12,407 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 23:09:12,407 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 23:09:12,408 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/condnf.c [2020-09-04 23:09:12,497 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b8acecafd/2cdb383624454025a985faab41dfb670/FLAGc6ef8c0e5 [2020-09-04 23:09:12,982 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 23:09:12,983 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/condnf.c [2020-09-04 23:09:12,992 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b8acecafd/2cdb383624454025a985faab41dfb670/FLAGc6ef8c0e5 [2020-09-04 23:09:13,320 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b8acecafd/2cdb383624454025a985faab41dfb670 [2020-09-04 23:09:13,338 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 23:09:13,340 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 23:09:13,344 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 23:09:13,345 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 23:09:13,349 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 23:09:13,350 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 11:09:13" (1/1) ... [2020-09-04 23:09:13,354 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@500f2ded and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:13, skipping insertion in model container [2020-09-04 23:09:13,354 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 11:09:13" (1/1) ... [2020-09-04 23:09:13,364 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 23:09:13,390 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 23:09:13,687 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 23:09:13,697 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 23:09:13,717 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 23:09:13,734 INFO L208 MainTranslator]: Completed translation [2020-09-04 23:09:13,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:13 WrapperNode [2020-09-04 23:09:13,735 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 23:09:13,736 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 23:09:13,736 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 23:09:13,737 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 23:09:13,837 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:13" (1/1) ... [2020-09-04 23:09:13,837 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:13" (1/1) ... [2020-09-04 23:09:13,848 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:13" (1/1) ... [2020-09-04 23:09:13,848 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:13" (1/1) ... [2020-09-04 23:09:13,856 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:13" (1/1) ... [2020-09-04 23:09:13,863 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:13" (1/1) ... [2020-09-04 23:09:13,865 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:13" (1/1) ... [2020-09-04 23:09:13,867 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 23:09:13,868 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 23:09:13,868 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 23:09:13,868 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 23:09:13,870 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:13" (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 [2020-09-04 23:09:13,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 23:09:13,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 23:09:13,948 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-04 23:09:13,948 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 23:09:13,948 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 23:09:13,948 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 23:09:13,948 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 23:09:13,949 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-04 23:09:13,954 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 23:09:13,954 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 23:09:13,955 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-04 23:09:13,955 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 23:09:13,955 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-04 23:09:13,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 23:09:13,955 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 23:09:13,956 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 23:09:13,956 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 23:09:13,956 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 23:09:14,271 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 23:09:14,271 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-04 23:09:14,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 11:09:14 BoogieIcfgContainer [2020-09-04 23:09:14,277 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 23:09:14,278 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 23:09:14,278 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 23:09:14,282 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 23:09:14,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 11:09:13" (1/3) ... [2020-09-04 23:09:14,283 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65e35bb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 11:09:14, skipping insertion in model container [2020-09-04 23:09:14,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:13" (2/3) ... [2020-09-04 23:09:14,284 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65e35bb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 11:09:14, skipping insertion in model container [2020-09-04 23:09:14,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 11:09:14" (3/3) ... [2020-09-04 23:09:14,287 INFO L109 eAbstractionObserver]: Analyzing ICFG condnf.c [2020-09-04 23:09:14,299 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 23:09:14,309 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 23:09:14,332 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 23:09:14,359 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 23:09:14,360 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 23:09:14,360 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-04 23:09:14,360 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 23:09:14,360 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 23:09:14,360 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 23:09:14,360 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 23:09:14,361 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 23:09:14,379 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states. [2020-09-04 23:09:14,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-04 23:09:14,393 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:09:14,394 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:09:14,395 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:09:14,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:09:14,403 INFO L82 PathProgramCache]: Analyzing trace with hash -386984160, now seen corresponding path program 1 times [2020-09-04 23:09:14,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:09:14,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245359597] [2020-09-04 23:09:14,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:09:14,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:14,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:09:14,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:14,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 23:09:14,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:14,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:09:14,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1245359597] [2020-09-04 23:09:14,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:09:14,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 23:09:14,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382240015] [2020-09-04 23:09:14,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 23:09:14,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:09:14,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 23:09:14,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 23:09:14,682 INFO L87 Difference]: Start difference. First operand 62 states. Second operand 3 states. [2020-09-04 23:09:14,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:09:14,873 INFO L93 Difference]: Finished difference Result 107 states and 124 transitions. [2020-09-04 23:09:14,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 23:09:14,875 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-09-04 23:09:14,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:09:14,887 INFO L225 Difference]: With dead ends: 107 [2020-09-04 23:09:14,887 INFO L226 Difference]: Without dead ends: 55 [2020-09-04 23:09:14,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 23:09:14,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-04 23:09:14,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-09-04 23:09:14,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-04 23:09:14,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2020-09-04 23:09:14,955 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 31 [2020-09-04 23:09:14,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:09:14,955 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2020-09-04 23:09:14,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 23:09:14,956 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2020-09-04 23:09:14,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-04 23:09:14,958 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:09:14,958 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:09:14,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 23:09:14,959 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:09:14,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:09:14,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1278196063, now seen corresponding path program 1 times [2020-09-04 23:09:14,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:09:14,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2084196178] [2020-09-04 23:09:14,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:09:14,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:15,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:09:15,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:15,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 23:09:15,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:15,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:09:15,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2084196178] [2020-09-04 23:09:15,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:09:15,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 23:09:15,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234201524] [2020-09-04 23:09:15,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 23:09:15,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:09:15,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 23:09:15,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-04 23:09:15,110 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 5 states. [2020-09-04 23:09:15,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:09:15,335 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2020-09-04 23:09:15,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 23:09:15,336 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-09-04 23:09:15,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:09:15,340 INFO L225 Difference]: With dead ends: 105 [2020-09-04 23:09:15,341 INFO L226 Difference]: Without dead ends: 78 [2020-09-04 23:09:15,342 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-04 23:09:15,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-04 23:09:15,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-09-04 23:09:15,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-04 23:09:15,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-09-04 23:09:15,365 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 31 [2020-09-04 23:09:15,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:09:15,365 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-09-04 23:09:15,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 23:09:15,366 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-09-04 23:09:15,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-04 23:09:15,367 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:09:15,379 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:09:15,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 23:09:15,380 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:09:15,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:09:15,380 INFO L82 PathProgramCache]: Analyzing trace with hash -620119431, now seen corresponding path program 1 times [2020-09-04 23:09:15,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:09:15,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [877306352] [2020-09-04 23:09:15,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:09:15,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:15,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:09:15,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:15,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 23:09:15,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:15,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-04 23:09:15,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [877306352] [2020-09-04 23:09:15,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:09:15,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-04 23:09:15,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687572188] [2020-09-04 23:09:15,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-04 23:09:15,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:09:15,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-04 23:09:15,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-09-04 23:09:15,669 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 11 states. [2020-09-04 23:09:16,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:09:16,079 INFO L93 Difference]: Finished difference Result 111 states and 119 transitions. [2020-09-04 23:09:16,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-04 23:09:16,080 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 46 [2020-09-04 23:09:16,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:09:16,082 INFO L225 Difference]: With dead ends: 111 [2020-09-04 23:09:16,083 INFO L226 Difference]: Without dead ends: 109 [2020-09-04 23:09:16,084 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2020-09-04 23:09:16,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-04 23:09:16,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2020-09-04 23:09:16,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-04 23:09:16,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 78 transitions. [2020-09-04 23:09:16,102 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 78 transitions. Word has length 46 [2020-09-04 23:09:16,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:09:16,102 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 78 transitions. [2020-09-04 23:09:16,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-04 23:09:16,103 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 78 transitions. [2020-09-04 23:09:16,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-04 23:09:16,104 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:09:16,104 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:09:16,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 23:09:16,105 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:09:16,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:09:16,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1321326334, now seen corresponding path program 1 times [2020-09-04 23:09:16,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:09:16,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1700539095] [2020-09-04 23:09:16,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:09:16,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 23:09:16,142 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 23:09:16,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 23:09:16,173 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 23:09:16,210 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 23:09:16,211 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 23:09:16,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 23:09:16,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 11:09:16 BoogieIcfgContainer [2020-09-04 23:09:16,259 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 23:09:16,262 INFO L168 Benchmark]: Toolchain (without parser) took 2920.91 ms. Allocated memory was 146.8 MB in the beginning and 234.4 MB in the end (delta: 87.6 MB). Free memory was 103.9 MB in the beginning and 109.1 MB in the end (delta: -5.2 MB). Peak memory consumption was 82.4 MB. Max. memory is 7.1 GB. [2020-09-04 23:09:16,263 INFO L168 Benchmark]: CDTParser took 0.93 ms. Allocated memory is still 146.8 MB. Free memory was 122.3 MB in the beginning and 122.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-04 23:09:16,264 INFO L168 Benchmark]: CACSL2BoogieTranslator took 391.49 ms. Allocated memory is still 146.8 MB. Free memory was 103.7 MB in the beginning and 93.4 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-09-04 23:09:16,265 INFO L168 Benchmark]: Boogie Preprocessor took 131.60 ms. Allocated memory was 146.8 MB in the beginning and 203.4 MB in the end (delta: 56.6 MB). Free memory was 93.4 MB in the beginning and 181.4 MB in the end (delta: -88.0 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-09-04 23:09:16,266 INFO L168 Benchmark]: RCFGBuilder took 408.82 ms. Allocated memory is still 203.4 MB. Free memory was 181.4 MB in the beginning and 162.6 MB in the end (delta: 18.8 MB). Peak memory consumption was 18.8 MB. Max. memory is 7.1 GB. [2020-09-04 23:09:16,267 INFO L168 Benchmark]: TraceAbstraction took 1980.69 ms. Allocated memory was 203.4 MB in the beginning and 234.4 MB in the end (delta: 30.9 MB). Free memory was 161.9 MB in the beginning and 109.1 MB in the end (delta: 52.9 MB). Peak memory consumption was 83.8 MB. Max. memory is 7.1 GB. [2020-09-04 23:09:16,271 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.93 ms. Allocated memory is still 146.8 MB. Free memory was 122.3 MB in the beginning and 122.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 391.49 ms. Allocated memory is still 146.8 MB. Free memory was 103.7 MB in the beginning and 93.4 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 131.60 ms. Allocated memory was 146.8 MB in the beginning and 203.4 MB in the end (delta: 56.6 MB). Free memory was 93.4 MB in the beginning and 181.4 MB in the end (delta: -88.0 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 408.82 ms. Allocated memory is still 203.4 MB. Free memory was 181.4 MB in the beginning and 162.6 MB in the end (delta: 18.8 MB). Peak memory consumption was 18.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1980.69 ms. Allocated memory was 203.4 MB in the beginning and 234.4 MB in the end (delta: 30.9 MB). Free memory was 161.9 MB in the beginning and 109.1 MB in the end (delta: 52.9 MB). Peak memory consumption was 83.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; VAL [\old(N)=6, N=0] [L21] N = __VERIFIER_nondet_int() VAL [\old(N)=0, __VERIFIER_nondet_int()=1, N=1] [L22] COND FALSE !(N <= 0) VAL [\old(N)=0, N=1] [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=1] [L11] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=1] [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=1] [L25] int i; VAL [\old(N)=0, N=1] [L26] int *a = malloc(sizeof(int)*N); VAL [\old(N)=0, a={-1:0}, malloc(sizeof(int)*N)={-1:0}, N=1] [L28] i=0 VAL [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=1] [L28] COND TRUE i N VAL [\old(N)=0, a={-1:0}, a[i]=2, i=0, malloc(sizeof(int)*N)={-1:0}, N=1] [L36] EXPR a[i] VAL [\old(N)=0, a={-1:0}, a[i]=2, i=0, malloc(sizeof(int)*N)={-1:0}, N=1] [L36] a[i] = a[i] VAL [\old(N)=0, a={-1:0}, a[i]=2, i=0, malloc(sizeof(int)*N)={-1:0}, N=1] [L33] i++ VAL [\old(N)=0, a={-1:0}, i=1, malloc(sizeof(int)*N)={-1:0}, N=1] [L33] COND FALSE !(i