./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/matrix-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9a8b2e8d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops/matrix-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 80a7a6e2534d75656de513ef49811aa0c37b16c0 ........................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 00:54:55,415 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:54:55,418 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:54:55,442 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:54:55,443 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:54:55,444 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:54:55,446 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:54:55,448 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:54:55,450 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:54:55,451 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:54:55,452 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:54:55,453 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:54:55,453 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:54:55,454 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:54:55,456 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:54:55,464 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:54:55,465 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:54:55,466 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:54:55,467 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:54:55,469 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:54:55,471 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:54:55,472 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:54:55,473 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:54:55,474 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:54:55,476 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:54:55,476 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:54:55,477 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:54:55,477 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:54:55,478 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:54:55,479 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:54:55,479 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:54:55,480 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:54:55,481 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:54:55,482 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:54:55,483 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:54:55,483 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:54:55,484 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:54:55,484 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:54:55,484 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:54:55,485 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:54:55,486 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:54:55,487 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 00:54:55,510 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:54:55,510 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:54:55,511 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:54:55,512 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:54:55,512 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:54:55,512 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:54:55,512 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:54:55,513 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 00:54:55,513 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:54:55,513 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:54:55,513 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:54:55,514 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:54:55,514 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:54:55,514 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:54:55,514 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:54:55,515 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:54:55,515 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:54:55,515 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:54:55,515 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:54:55,515 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:54:55,516 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:54:55,516 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:54:55,516 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:54:55,517 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:54:55,517 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:54:55,517 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 00:54:55,517 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 00:54:55,517 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:54:55,518 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:54:55,518 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 80a7a6e2534d75656de513ef49811aa0c37b16c0 [2020-10-20 00:54:55,719 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:54:55,732 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:54:55,736 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:54:55,738 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:54:55,739 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:54:55,740 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/matrix-2.c [2020-10-20 00:54:55,826 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b24663758/ae1a8bd73b13401c95ca49b4ac6e8ac9/FLAGdaf70ba21 [2020-10-20 00:54:56,396 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:54:56,397 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/matrix-2.c [2020-10-20 00:54:56,406 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b24663758/ae1a8bd73b13401c95ca49b4ac6e8ac9/FLAGdaf70ba21 [2020-10-20 00:54:56,727 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b24663758/ae1a8bd73b13401c95ca49b4ac6e8ac9 [2020-10-20 00:54:56,731 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:54:56,738 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:54:56,739 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:54:56,740 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:54:56,743 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:54:56,744 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:54:56" (1/1) ... [2020-10-20 00:54:56,747 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62540067 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:54:56, skipping insertion in model container [2020-10-20 00:54:56,748 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:54:56" (1/1) ... [2020-10-20 00:54:56,756 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:54:56,781 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:54:56,977 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:54:56,989 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:54:57,014 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:54:57,032 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:54:57,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:54:57 WrapperNode [2020-10-20 00:54:57,033 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:54:57,034 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:54:57,034 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:54:57,034 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:54:57,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:54:57" (1/1) ... [2020-10-20 00:54:57,052 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:54:57" (1/1) ... [2020-10-20 00:54:57,079 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:54:57,081 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:54:57,081 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:54:57,081 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:54:57,093 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:54:57" (1/1) ... [2020-10-20 00:54:57,093 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:54:57" (1/1) ... [2020-10-20 00:54:57,096 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:54:57" (1/1) ... [2020-10-20 00:54:57,097 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:54:57" (1/1) ... [2020-10-20 00:54:57,108 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:54:57" (1/1) ... [2020-10-20 00:54:57,117 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:54:57" (1/1) ... [2020-10-20 00:54:57,119 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:54:57" (1/1) ... [2020-10-20 00:54:57,122 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:54:57,122 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:54:57,123 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:54:57,123 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:54:57,124 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:54:57" (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 [2020-10-20 00:54:57,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 00:54:57,203 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:54:57,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-20 00:54:57,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:54:57,204 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:54:57,204 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-20 00:54:57,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 00:54:57,484 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:54:57,485 INFO L298 CfgBuilder]: Removed 12 assume(true) statements. [2020-10-20 00:54:57,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:54:57 BoogieIcfgContainer [2020-10-20 00:54:57,487 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:54:57,489 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:54:57,489 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:54:57,493 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:54:57,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:54:56" (1/3) ... [2020-10-20 00:54:57,494 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c988368 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:54:57, skipping insertion in model container [2020-10-20 00:54:57,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:54:57" (2/3) ... [2020-10-20 00:54:57,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c988368 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:54:57, skipping insertion in model container [2020-10-20 00:54:57,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:54:57" (3/3) ... [2020-10-20 00:54:57,499 INFO L111 eAbstractionObserver]: Analyzing ICFG matrix-2.c [2020-10-20 00:54:57,523 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:54:57,532 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:54:57,551 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:54:57,590 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:54:57,590 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:54:57,591 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:54:57,591 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:54:57,591 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:54:57,592 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:54:57,592 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:54:57,592 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:54:57,609 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-10-20 00:54:57,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-20 00:54:57,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:54:57,618 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:54:57,619 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:54:57,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:54:57,626 INFO L82 PathProgramCache]: Analyzing trace with hash 228332486, now seen corresponding path program 1 times [2020-10-20 00:54:57,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:54:57,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441606712] [2020-10-20 00:54:57,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:54:57,750 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-20 00:54:57,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1487256213] [2020-10-20 00:54:57,752 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 [2020-10-20 00:54:57,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:54:57,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 00:54:57,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:54:57,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:54:57,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441606712] [2020-10-20 00:54:57,973 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-20 00:54:57,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487256213] [2020-10-20 00:54:57,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:54:57,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 00:54:57,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759166987] [2020-10-20 00:54:57,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:54:57,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:54:57,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:54:57,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:54:57,999 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 4 states. [2020-10-20 00:54:58,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:54:58,127 INFO L93 Difference]: Finished difference Result 58 states and 87 transitions. [2020-10-20 00:54:58,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:54:58,129 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-10-20 00:54:58,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:54:58,140 INFO L225 Difference]: With dead ends: 58 [2020-10-20 00:54:58,140 INFO L226 Difference]: Without dead ends: 29 [2020-10-20 00:54:58,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 00:54:58,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-20 00:54:58,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 17. [2020-10-20 00:54:58,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-20 00:54:58,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2020-10-20 00:54:58,177 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 8 [2020-10-20 00:54:58,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:54:58,177 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2020-10-20 00:54:58,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:54:58,178 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2020-10-20 00:54:58,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 00:54:58,178 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:54:58,179 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:54:58,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-10-20 00:54:58,393 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:54:58,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:54:58,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1185124407, now seen corresponding path program 1 times [2020-10-20 00:54:58,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:54:58,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429374886] [2020-10-20 00:54:58,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:54:58,412 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-20 00:54:58,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [264001597] [2020-10-20 00:54:58,413 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 [2020-10-20 00:54:58,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:54:58,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 00:54:58,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:54:58,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:54:58,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429374886] [2020-10-20 00:54:58,586 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-20 00:54:58,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264001597] [2020-10-20 00:54:58,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:54:58,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 00:54:58,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575665434] [2020-10-20 00:54:58,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:54:58,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:54:58,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:54:58,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:54:58,596 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 4 states. [2020-10-20 00:54:58,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:54:58,723 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2020-10-20 00:54:58,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:54:58,725 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-10-20 00:54:58,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:54:58,726 INFO L225 Difference]: With dead ends: 47 [2020-10-20 00:54:58,726 INFO L226 Difference]: Without dead ends: 26 [2020-10-20 00:54:58,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 00:54:58,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-20 00:54:58,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 19. [2020-10-20 00:54:58,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-20 00:54:58,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2020-10-20 00:54:58,735 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 11 [2020-10-20 00:54:58,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:54:58,736 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2020-10-20 00:54:58,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:54:58,736 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2020-10-20 00:54:58,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-20 00:54:58,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:54:58,737 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:54:58,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:54:58,950 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:54:58,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:54:58,951 INFO L82 PathProgramCache]: Analyzing trace with hash 206458815, now seen corresponding path program 1 times [2020-10-20 00:54:58,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:54:58,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071342659] [2020-10-20 00:54:58,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:54:58,968 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-20 00:54:58,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [389579044] [2020-10-20 00:54:58,969 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 [2020-10-20 00:54:59,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:54:59,037 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:54:59,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:54:59,062 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:54:59,111 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 00:54:59,111 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 00:54:59,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:54:59,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:54:59 BoogieIcfgContainer [2020-10-20 00:54:59,360 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:54:59,360 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:54:59,360 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:54:59,360 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:54:59,361 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:54:57" (3/4) ... [2020-10-20 00:54:59,364 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-20 00:54:59,422 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 00:54:59,422 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:54:59,425 INFO L168 Benchmark]: Toolchain (without parser) took 2692.04 ms. Allocated memory was 40.9 MB in the beginning and 46.7 MB in the end (delta: 5.8 MB). Free memory was 19.0 MB in the beginning and 19.9 MB in the end (delta: -889.9 kB). Peak memory consumption was 4.9 MB. Max. memory is 14.3 GB. [2020-10-20 00:54:59,426 INFO L168 Benchmark]: CDTParser took 0.44 ms. Allocated memory is still 31.5 MB. Free memory was 6.7 MB in the beginning and 6.7 MB in the end (delta: 41.5 kB). Peak memory consumption was 41.5 kB. Max. memory is 14.3 GB. [2020-10-20 00:54:59,427 INFO L168 Benchmark]: CACSL2BoogieTranslator took 293.87 ms. Allocated memory was 40.9 MB in the beginning and 41.9 MB in the end (delta: 1.0 MB). Free memory was 18.1 MB in the beginning and 16.9 MB in the end (delta: 1.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 14.3 GB. [2020-10-20 00:54:59,428 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.85 ms. Allocated memory is still 41.9 MB. Free memory was 16.9 MB in the beginning and 14.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 14.3 GB. [2020-10-20 00:54:59,428 INFO L168 Benchmark]: Boogie Preprocessor took 41.34 ms. Allocated memory is still 41.9 MB. Free memory was 14.9 MB in the beginning and 13.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. [2020-10-20 00:54:59,429 INFO L168 Benchmark]: RCFGBuilder took 365.13 ms. Allocated memory was 41.9 MB in the beginning and 43.5 MB in the end (delta: 1.6 MB). Free memory was 13.4 MB in the beginning and 11.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 3.2 MB. Max. memory is 14.3 GB. [2020-10-20 00:54:59,430 INFO L168 Benchmark]: TraceAbstraction took 1870.99 ms. Allocated memory was 43.5 MB in the beginning and 46.7 MB in the end (delta: 3.1 MB). Free memory was 11.5 MB in the beginning and 22.7 MB in the end (delta: -11.2 MB). There was no memory consumed. Max. memory is 14.3 GB. [2020-10-20 00:54:59,431 INFO L168 Benchmark]: Witness Printer took 62.49 ms. Allocated memory is still 46.7 MB. Free memory was 22.7 MB in the beginning and 19.9 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 14.3 GB. [2020-10-20 00:54:59,435 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.44 ms. Allocated memory is still 31.5 MB. Free memory was 6.7 MB in the beginning and 6.7 MB in the end (delta: 41.5 kB). Peak memory consumption was 41.5 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 293.87 ms. Allocated memory was 40.9 MB in the beginning and 41.9 MB in the end (delta: 1.0 MB). Free memory was 18.1 MB in the beginning and 16.9 MB in the end (delta: 1.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 46.85 ms. Allocated memory is still 41.9 MB. Free memory was 16.9 MB in the beginning and 14.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 41.34 ms. Allocated memory is still 41.9 MB. Free memory was 14.9 MB in the beginning and 13.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. * RCFGBuilder took 365.13 ms. Allocated memory was 41.9 MB in the beginning and 43.5 MB in the end (delta: 1.6 MB). Free memory was 13.4 MB in the beginning and 11.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 3.2 MB. Max. memory is 14.3 GB. * TraceAbstraction took 1870.99 ms. Allocated memory was 43.5 MB in the beginning and 46.7 MB in the end (delta: 3.1 MB). Free memory was 11.5 MB in the beginning and 22.7 MB in the end (delta: -11.2 MB). There was no memory consumed. Max. memory is 14.3 GB. * Witness Printer took 62.49 ms. Allocated memory is still 46.7 MB. Free memory was 22.7 MB in the beginning and 19.9 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L16] unsigned int N_LIN=__VERIFIER_nondet_uint(); [L17] unsigned int N_COL=__VERIFIER_nondet_uint(); [L18] unsigned int j,k; [L19] int matriz[N_COL][N_LIN], maior; [L21] maior = __VERIFIER_nondet_int() [L22] j=0 [L22] COND TRUE jmaior [L28] EXPR matriz[j][k] [L28] maior = matriz[j][k] [L23] k++ [L23] COND FALSE !(k