/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/matrix-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 16:56:58,754 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 16:56:58,756 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 16:56:58,784 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 16:56:58,784 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 16:56:58,785 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 16:56:58,787 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 16:56:58,789 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 16:56:58,790 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 16:56:58,791 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 16:56:58,792 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 16:56:58,793 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 16:56:58,793 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 16:56:58,794 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 16:56:58,795 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 16:56:58,797 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 16:56:58,798 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 16:56:58,799 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 16:56:58,801 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 16:56:58,803 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 16:56:58,804 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 16:56:58,805 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 16:56:58,806 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 16:56:58,807 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 16:56:58,810 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 16:56:58,817 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 16:56:58,818 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 16:56:58,819 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 16:56:58,819 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 [2020-08-22 16:56:58,842 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 16:56:58,843 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 16:56:58,844 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 16:56:58,844 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 16:56:58,844 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 16:56:58,845 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 16:56:58,845 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 16:56:58,845 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 16:56:58,845 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 16:56:58,845 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 16:56:58,846 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 16:56:58,846 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 16:56:58,846 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 16:56:58,846 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 16:56:58,846 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 16:56:58,846 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 16:56:58,847 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 16:56:58,847 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 16:56:58,847 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 16:56:58,847 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 16:56:58,847 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 16:56:58,848 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:56:58,848 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 16:56:58,848 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 16:56:58,848 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 16:56:58,848 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 16:56:58,849 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 16:56:58,849 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 16:56:58,849 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 16:56:58,849 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-22 16:56:59,158 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 16:56:59,178 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 16:56:59,183 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 16:56:59,185 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 16:56:59,185 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 16:56:59,186 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/matrix-2.c [2020-08-22 16:56:59,262 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05cf7aedb/b1e3cc05870649c89aec7b46e5e677fb/FLAG9503a450a [2020-08-22 16:56:59,712 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 16:56:59,712 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/matrix-2.c [2020-08-22 16:56:59,718 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05cf7aedb/b1e3cc05870649c89aec7b46e5e677fb/FLAG9503a450a [2020-08-22 16:57:00,078 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05cf7aedb/b1e3cc05870649c89aec7b46e5e677fb [2020-08-22 16:57:00,086 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 16:57:00,088 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 16:57:00,089 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 16:57:00,089 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 16:57:00,093 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 16:57:00,094 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:57:00" (1/1) ... [2020-08-22 16:57:00,097 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10439909 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:00, skipping insertion in model container [2020-08-22 16:57:00,097 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:57:00" (1/1) ... [2020-08-22 16:57:00,105 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 16:57:00,123 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 16:57:00,305 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:57:00,309 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 16:57:00,335 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:57:00,356 INFO L208 MainTranslator]: Completed translation [2020-08-22 16:57:00,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:00 WrapperNode [2020-08-22 16:57:00,357 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 16:57:00,357 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 16:57:00,358 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 16:57:00,358 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 16:57:00,465 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:00" (1/1) ... [2020-08-22 16:57:00,467 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:00" (1/1) ... [2020-08-22 16:57:00,488 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:00" (1/1) ... [2020-08-22 16:57:00,488 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:00" (1/1) ... [2020-08-22 16:57:00,497 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:00" (1/1) ... [2020-08-22 16:57:00,508 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:00" (1/1) ... [2020-08-22 16:57:00,511 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:00" (1/1) ... [2020-08-22 16:57:00,519 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 16:57:00,520 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 16:57:00,520 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 16:57:00,520 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 16:57:00,521 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:00" (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 [2020-08-22 16:57:00,590 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 16:57:00,591 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 16:57:00,591 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 16:57:00,591 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 16:57:00,591 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 16:57:00,591 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 16:57:00,592 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-22 16:57:00,592 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 16:57:00,592 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 16:57:00,592 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 16:57:00,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 16:57:00,592 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 16:57:00,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 16:57:00,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 16:57:00,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 16:57:00,907 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 16:57:00,907 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-22 16:57:00,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:57:00 BoogieIcfgContainer [2020-08-22 16:57:00,912 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 16:57:00,913 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 16:57:00,913 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 16:57:00,916 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 16:57:00,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:57:00" (1/3) ... [2020-08-22 16:57:00,920 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f487804 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:57:00, skipping insertion in model container [2020-08-22 16:57:00,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:00" (2/3) ... [2020-08-22 16:57:00,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f487804 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:57:00, skipping insertion in model container [2020-08-22 16:57:00,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:57:00" (3/3) ... [2020-08-22 16:57:00,923 INFO L109 eAbstractionObserver]: Analyzing ICFG matrix-2.c [2020-08-22 16:57:00,945 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-08-22 16:57:00,955 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 16:57:00,976 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 16:57:00,996 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 16:57:00,996 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 16:57:00,996 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-08-22 16:57:00,997 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 16:57:00,997 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 16:57:00,997 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 16:57:00,997 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 16:57:00,997 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 16:57:01,016 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-08-22 16:57:01,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-22 16:57:01,026 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:01,027 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:57:01,027 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:57:01,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:57:01,034 INFO L82 PathProgramCache]: Analyzing trace with hash -2125374060, now seen corresponding path program 1 times [2020-08-22 16:57:01,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:57:01,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727066837] [2020-08-22 16:57:01,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:57:01,141 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-22 16:57:01,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1538657732] [2020-08-22 16:57:01,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:57:01,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:01,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 1 conjunts are in the unsatisfiable core [2020-08-22 16:57:01,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:57:01,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:01,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727066837] [2020-08-22 16:57:01,245 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-08-22 16:57:01,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538657732] [2020-08-22 16:57:01,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:57:01,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-22 16:57:01,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191439119] [2020-08-22 16:57:01,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-22 16:57:01,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:57:01,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-22 16:57:01,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 16:57:01,266 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2020-08-22 16:57:01,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:57:01,289 INFO L93 Difference]: Finished difference Result 52 states and 71 transitions. [2020-08-22 16:57:01,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-22 16:57:01,290 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-08-22 16:57:01,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:57:01,297 INFO L225 Difference]: With dead ends: 52 [2020-08-22 16:57:01,298 INFO L226 Difference]: Without dead ends: 24 [2020-08-22 16:57:01,302 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 16:57:01,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-22 16:57:01,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-22 16:57:01,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-22 16:57:01,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-08-22 16:57:01,345 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 14 [2020-08-22 16:57:01,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:57:01,345 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-08-22 16:57:01,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-22 16:57:01,346 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-08-22 16:57:01,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-22 16:57:01,347 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:01,347 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:57:01,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-08-22 16:57:01,562 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:57:01,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:57:01,563 INFO L82 PathProgramCache]: Analyzing trace with hash 739661195, now seen corresponding path program 1 times [2020-08-22 16:57:01,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:57:01,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672459878] [2020-08-22 16:57:01,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:57:01,593 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-22 16:57:01,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [184857983] [2020-08-22 16:57:01,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:57:01,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:01,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2020-08-22 16:57:01,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:57:01,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:01,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672459878] [2020-08-22 16:57:01,781 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-08-22 16:57:01,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184857983] [2020-08-22 16:57:01,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:57:01,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 16:57:01,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092015339] [2020-08-22 16:57:01,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 16:57:01,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:57:01,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 16:57:01,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 16:57:01,785 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 4 states. [2020-08-22 16:57:01,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:57:01,874 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2020-08-22 16:57:01,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 16:57:01,875 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-08-22 16:57:01,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:57:01,878 INFO L225 Difference]: With dead ends: 49 [2020-08-22 16:57:01,878 INFO L226 Difference]: Without dead ends: 35 [2020-08-22 16:57:01,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 16:57:01,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-08-22 16:57:01,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 25. [2020-08-22 16:57:01,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-22 16:57:01,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-08-22 16:57:01,896 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 14 [2020-08-22 16:57:01,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:57:01,897 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-08-22 16:57:01,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 16:57:01,897 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-08-22 16:57:01,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-22 16:57:01,898 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:01,899 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:57:02,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:57:02,115 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:57:02,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:57:02,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1656958391, now seen corresponding path program 1 times [2020-08-22 16:57:02,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:57:02,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430066716] [2020-08-22 16:57:02,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:57:02,134 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-22 16:57:02,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [929892204] [2020-08-22 16:57:02,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:57:02,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:02,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2020-08-22 16:57:02,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:57:02,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:02,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430066716] [2020-08-22 16:57:02,255 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-08-22 16:57:02,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929892204] [2020-08-22 16:57:02,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:57:02,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 16:57:02,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782800075] [2020-08-22 16:57:02,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 16:57:02,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:57:02,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 16:57:02,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 16:57:02,258 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 4 states. [2020-08-22 16:57:02,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:57:02,356 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2020-08-22 16:57:02,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 16:57:02,357 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-08-22 16:57:02,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:57:02,358 INFO L225 Difference]: With dead ends: 57 [2020-08-22 16:57:02,359 INFO L226 Difference]: Without dead ends: 32 [2020-08-22 16:57:02,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 16:57:02,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-22 16:57:02,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2020-08-22 16:57:02,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-22 16:57:02,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-08-22 16:57:02,366 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 17 [2020-08-22 16:57:02,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:57:02,367 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-08-22 16:57:02,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 16:57:02,367 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-08-22 16:57:02,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 16:57:02,368 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:02,368 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] [2020-08-22 16:57:02,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:57:02,569 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:57:02,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:57:02,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1471852900, now seen corresponding path program 1 times [2020-08-22 16:57:02,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:57:02,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400015599] [2020-08-22 16:57:02,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:57:02,580 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-22 16:57:02,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1998639928] [2020-08-22 16:57:02,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:57:02,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 16:57:02,653 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 16:57:02,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 16:57:02,671 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 16:57:02,697 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-08-22 16:57:02,697 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 16:57:02,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:57:02,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 04:57:02 BoogieIcfgContainer [2020-08-22 16:57:02,947 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 16:57:02,950 INFO L168 Benchmark]: Toolchain (without parser) took 2861.23 ms. Allocated memory was 137.9 MB in the beginning and 231.7 MB in the end (delta: 93.8 MB). Free memory was 101.0 MB in the beginning and 194.9 MB in the end (delta: -94.0 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-22 16:57:02,951 INFO L168 Benchmark]: CDTParser took 0.52 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 16:57:02,952 INFO L168 Benchmark]: CACSL2BoogieTranslator took 268.11 ms. Allocated memory is still 137.9 MB. Free memory was 100.8 MB in the beginning and 90.4 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-08-22 16:57:02,953 INFO L168 Benchmark]: Boogie Preprocessor took 162.36 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 90.4 MB in the beginning and 178.5 MB in the end (delta: -88.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-08-22 16:57:02,954 INFO L168 Benchmark]: RCFGBuilder took 391.72 ms. Allocated memory is still 201.3 MB. Free memory was 178.5 MB in the beginning and 161.1 MB in the end (delta: 17.4 MB). Peak memory consumption was 17.4 MB. Max. memory is 7.1 GB. [2020-08-22 16:57:02,955 INFO L168 Benchmark]: TraceAbstraction took 2034.00 ms. Allocated memory was 201.3 MB in the beginning and 231.7 MB in the end (delta: 30.4 MB). Free memory was 161.1 MB in the beginning and 194.9 MB in the end (delta: -33.8 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-22 16:57:02,959 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.52 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 268.11 ms. Allocated memory is still 137.9 MB. Free memory was 100.8 MB in the beginning and 90.4 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 162.36 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 90.4 MB in the beginning and 178.5 MB in the end (delta: -88.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 391.72 ms. Allocated memory is still 201.3 MB. Free memory was 178.5 MB in the beginning and 161.1 MB in the end (delta: 17.4 MB). Peak memory consumption was 17.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2034.00 ms. Allocated memory was 201.3 MB in the beginning and 231.7 MB in the end (delta: 30.4 MB). Free memory was 161.1 MB in the beginning and 194.9 MB in the end (delta: -33.8 MB). There was no memory consumed. 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: [L14] unsigned int N_LIN=__VERIFIER_nondet_uint(); [L15] unsigned int N_COL=__VERIFIER_nondet_uint(); [L16] unsigned int j,k; [L17] int matriz[N_COL][N_LIN], maior; [L19] maior = __VERIFIER_nondet_int() [L20] j=0 VAL [j=0, maior=-1, matriz={2:0}, N_COL=1, N_LIN=1] [L20] COND TRUE jmaior [L26] EXPR matriz[j][k] [L26] maior = matriz[j][k] [L21] k++ VAL [j=0, k=1, maior=0, matriz={2:0}, N_COL=1, N_LIN=1] [L21] COND FALSE !(k