./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/s4iff.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/array-fpi/s4iff.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 98b440d2018d3020f67dce8008e7aad4265ed1f1 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 [2020-10-19 22:17:30,311 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 22:17:30,314 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 22:17:30,349 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 22:17:30,349 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 22:17:30,359 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 22:17:30,361 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 22:17:30,363 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 22:17:30,365 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 22:17:30,369 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 22:17:30,370 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 22:17:30,372 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 22:17:30,373 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 22:17:30,375 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 22:17:30,376 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 22:17:30,378 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 22:17:30,379 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 22:17:30,380 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 22:17:30,383 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 22:17:30,388 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 22:17:30,390 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 22:17:30,391 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 22:17:30,392 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 22:17:30,393 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 22:17:30,405 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 22:17:30,407 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 22:17:30,414 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 22:17:30,415 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 22:17:30,415 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 22:17:30,416 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 22:17:30,416 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 22:17:30,417 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 22:17:30,418 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 22:17:30,420 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 22:17:30,421 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 22:17:30,421 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 22:17:30,422 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 22:17:30,425 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 22:17:30,425 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 22:17:30,426 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 22:17:30,427 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 22:17:30,429 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-19 22:17:30,453 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 22:17:30,453 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 22:17:30,455 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 22:17:30,455 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 22:17:30,455 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 22:17:30,455 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 22:17:30,455 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 22:17:30,456 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 22:17:30,456 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 22:17:30,456 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 22:17:30,456 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-19 22:17:30,456 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 22:17:30,456 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-19 22:17:30,457 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 22:17:30,457 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-19 22:17:30,457 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 22:17:30,457 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-19 22:17:30,457 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 22:17:30,458 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 22:17:30,458 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 22:17:30,458 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 22:17:30,458 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 22:17:30,458 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 22:17:30,459 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 22:17:30,459 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-19 22:17:30,459 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 22:17:30,459 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-19 22:17:30,459 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-19 22:17:30,459 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 22:17:30,460 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 -> 98b440d2018d3020f67dce8008e7aad4265ed1f1 [2020-10-19 22:17:30,697 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 22:17:30,711 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 22:17:30,716 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 22:17:30,719 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 22:17:30,719 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 22:17:30,720 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/s4iff.c [2020-10-19 22:17:30,783 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ccba5b67/81a528f468954b2f9e50c45e2234bd22/FLAGc01a1161e [2020-10-19 22:17:31,160 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 22:17:31,161 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s4iff.c [2020-10-19 22:17:31,168 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ccba5b67/81a528f468954b2f9e50c45e2234bd22/FLAGc01a1161e [2020-10-19 22:17:31,527 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ccba5b67/81a528f468954b2f9e50c45e2234bd22 [2020-10-19 22:17:31,531 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 22:17:31,546 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-19 22:17:31,550 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 22:17:31,551 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 22:17:31,555 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 22:17:31,556 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 10:17:31" (1/1) ... [2020-10-19 22:17:31,560 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5144f8ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:17:31, skipping insertion in model container [2020-10-19 22:17:31,560 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 10:17:31" (1/1) ... [2020-10-19 22:17:31,569 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 22:17:31,590 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 22:17:31,868 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 22:17:31,880 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 22:17:31,923 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 22:17:31,944 INFO L208 MainTranslator]: Completed translation [2020-10-19 22:17:31,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:17:31 WrapperNode [2020-10-19 22:17:31,945 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 22:17:31,946 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-19 22:17:31,946 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-19 22:17:31,946 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-19 22:17:31,955 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:17:31" (1/1) ... [2020-10-19 22:17:31,978 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:17:31" (1/1) ... [2020-10-19 22:17:32,012 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-19 22:17:32,013 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 22:17:32,013 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 22:17:32,013 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 22:17:32,024 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:17:31" (1/1) ... [2020-10-19 22:17:32,025 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:17:31" (1/1) ... [2020-10-19 22:17:32,030 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:17:31" (1/1) ... [2020-10-19 22:17:32,030 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:17:31" (1/1) ... [2020-10-19 22:17:32,049 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:17:31" (1/1) ... [2020-10-19 22:17:32,055 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:17:31" (1/1) ... [2020-10-19 22:17:32,066 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:17:31" (1/1) ... [2020-10-19 22:17:32,070 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 22:17:32,072 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 22:17:32,072 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 22:17:32,073 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 22:17:32,074 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:17:31" (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 [2020-10-19 22:17:32,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-19 22:17:32,157 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 22:17:32,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-19 22:17:32,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-19 22:17:32,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 22:17:32,158 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 22:17:32,158 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-19 22:17:32,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-19 22:17:32,476 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 22:17:32,477 INFO L298 CfgBuilder]: Removed 12 assume(true) statements. [2020-10-19 22:17:32,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:17:32 BoogieIcfgContainer [2020-10-19 22:17:32,480 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 22:17:32,481 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 22:17:32,481 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 22:17:32,485 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 22:17:32,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 10:17:31" (1/3) ... [2020-10-19 22:17:32,487 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@143775db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 10:17:32, skipping insertion in model container [2020-10-19 22:17:32,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:17:31" (2/3) ... [2020-10-19 22:17:32,487 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@143775db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 10:17:32, skipping insertion in model container [2020-10-19 22:17:32,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:17:32" (3/3) ... [2020-10-19 22:17:32,489 INFO L111 eAbstractionObserver]: Analyzing ICFG s4iff.c [2020-10-19 22:17:32,501 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 22:17:32,509 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-19 22:17:32,523 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-19 22:17:32,551 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 22:17:32,551 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-19 22:17:32,552 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 22:17:32,552 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 22:17:32,552 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 22:17:32,552 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 22:17:32,552 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 22:17:32,552 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 22:17:32,569 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-10-19 22:17:32,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-19 22:17:32,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:17:32,575 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:17:32,576 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:17:32,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:17:32,581 INFO L82 PathProgramCache]: Analyzing trace with hash 356661439, now seen corresponding path program 1 times [2020-10-19 22:17:32,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:17:32,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914418922] [2020-10-19 22:17:32,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:17:32,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:17:32,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:17:32,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914418922] [2020-10-19 22:17:32,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:17:32,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-19 22:17:32,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920865921] [2020-10-19 22:17:32,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-19 22:17:32,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:17:32,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-19 22:17:32,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-19 22:17:32,766 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-10-19 22:17:32,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:17:32,782 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2020-10-19 22:17:32,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-19 22:17:32,784 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-10-19 22:17:32,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:17:32,794 INFO L225 Difference]: With dead ends: 35 [2020-10-19 22:17:32,794 INFO L226 Difference]: Without dead ends: 15 [2020-10-19 22:17:32,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-19 22:17:32,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-19 22:17:32,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-19 22:17:32,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-19 22:17:32,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-10-19 22:17:32,831 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2020-10-19 22:17:32,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:17:32,832 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-10-19 22:17:32,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-19 22:17:32,832 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-10-19 22:17:32,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-19 22:17:32,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:17:32,833 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:17:32,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-19 22:17:32,834 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:17:32,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:17:32,834 INFO L82 PathProgramCache]: Analyzing trace with hash -452685187, now seen corresponding path program 1 times [2020-10-19 22:17:32,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:17:32,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497596496] [2020-10-19 22:17:32,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:17:32,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:17:32,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:17:32,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497596496] [2020-10-19 22:17:32,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:17:32,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 22:17:32,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70425636] [2020-10-19 22:17:32,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 22:17:32,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:17:32,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 22:17:32,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-19 22:17:32,927 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 4 states. [2020-10-19 22:17:33,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:17:33,006 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2020-10-19 22:17:33,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 22:17:33,007 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-10-19 22:17:33,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:17:33,008 INFO L225 Difference]: With dead ends: 28 [2020-10-19 22:17:33,009 INFO L226 Difference]: Without dead ends: 20 [2020-10-19 22:17:33,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-19 22:17:33,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-19 22:17:33,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2020-10-19 22:17:33,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-19 22:17:33,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-10-19 22:17:33,016 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2020-10-19 22:17:33,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:17:33,016 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-10-19 22:17:33,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 22:17:33,017 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-10-19 22:17:33,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-19 22:17:33,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:17:33,018 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:17:33,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-19 22:17:33,019 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:17:33,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:17:33,019 INFO L82 PathProgramCache]: Analyzing trace with hash 623611495, now seen corresponding path program 1 times [2020-10-19 22:17:33,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:17:33,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891849976] [2020-10-19 22:17:33,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:17:33,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:17:33,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:17:33,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891849976] [2020-10-19 22:17:33,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680471628] [2020-10-19 22:17:33,557 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 [2020-10-19 22:17:33,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:17:33,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-19 22:17:33,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:17:33,754 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-10-19 22:17:33,755 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 22:17:33,769 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 22:17:33,770 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 22:17:33,770 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2020-10-19 22:17:33,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 22:17:33,813 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-10-19 22:17:33,814 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 22:17:33,828 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 22:17:33,828 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 22:17:33,829 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:30 [2020-10-19 22:17:34,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 22:17:34,130 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 22:17:34,131 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 57 [2020-10-19 22:17:34,132 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 22:17:34,172 INFO L625 ElimStorePlain]: treesize reduction 22, result has 71.1 percent of original size [2020-10-19 22:17:34,192 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-10-19 22:17:34,192 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:71, output treesize:54 [2020-10-19 22:17:34,325 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 22:17:34,341 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-19 22:17:34,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:17:34,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 22:17:34,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2020-10-19 22:17:34,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745911705] [2020-10-19 22:17:34,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-19 22:17:34,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:17:34,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-19 22:17:34,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-10-19 22:17:34,465 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 17 states. [2020-10-19 22:17:35,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:17:35,146 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-10-19 22:17:35,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-19 22:17:35,146 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 16 [2020-10-19 22:17:35,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:17:35,149 INFO L225 Difference]: With dead ends: 35 [2020-10-19 22:17:35,149 INFO L226 Difference]: Without dead ends: 26 [2020-10-19 22:17:35,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2020-10-19 22:17:35,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-19 22:17:35,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2020-10-19 22:17:35,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-19 22:17:35,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-10-19 22:17:35,157 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 16 [2020-10-19 22:17:35,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:17:35,158 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-10-19 22:17:35,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-19 22:17:35,158 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-10-19 22:17:35,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-19 22:17:35,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:17:35,160 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:17:35,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-19 22:17:35,374 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:17:35,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:17:35,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1137819675, now seen corresponding path program 2 times [2020-10-19 22:17:35,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:17:35,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047756684] [2020-10-19 22:17:35,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:17:35,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:17:35,500 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:17:35,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047756684] [2020-10-19 22:17:35,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814777556] [2020-10-19 22:17:35,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-10-19 22:17:35,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 22:17:35,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 22:17:35,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-19 22:17:35,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:17:35,604 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:17:35,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 22:17:35,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-10-19 22:17:35,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460181366] [2020-10-19 22:17:35,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-19 22:17:35,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:17:35,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-19 22:17:35,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-10-19 22:17:35,607 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 10 states. [2020-10-19 22:17:35,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:17:35,755 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-10-19 22:17:35,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-19 22:17:35,756 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-10-19 22:17:35,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:17:35,757 INFO L225 Difference]: With dead ends: 33 [2020-10-19 22:17:35,757 INFO L226 Difference]: Without dead ends: 29 [2020-10-19 22:17:35,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-19 22:17:35,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-19 22:17:35,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2020-10-19 22:17:35,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-19 22:17:35,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-10-19 22:17:35,764 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 18 [2020-10-19 22:17:35,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:17:35,765 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-10-19 22:17:35,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-19 22:17:35,765 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-10-19 22:17:35,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-19 22:17:35,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:17:35,766 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:17:35,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 22:17:35,981 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:17:35,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:17:35,981 INFO L82 PathProgramCache]: Analyzing trace with hash -479454913, now seen corresponding path program 3 times [2020-10-19 22:17:35,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:17:35,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96741785] [2020-10-19 22:17:35,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:17:36,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:17:36,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:17:36,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96741785] [2020-10-19 22:17:36,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52125992] [2020-10-19 22:17:36,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-10-19 22:17:36,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-19 22:17:36,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 22:17:36,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-19 22:17:36,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:17:36,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:17:36,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 22:17:36,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-10-19 22:17:36,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037432850] [2020-10-19 22:17:36,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-19 22:17:36,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:17:36,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-19 22:17:36,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-19 22:17:36,201 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 10 states. [2020-10-19 22:17:36,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:17:36,306 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2020-10-19 22:17:36,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-19 22:17:36,307 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2020-10-19 22:17:36,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:17:36,308 INFO L225 Difference]: With dead ends: 37 [2020-10-19 22:17:36,308 INFO L226 Difference]: Without dead ends: 25 [2020-10-19 22:17:36,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-19 22:17:36,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-19 22:17:36,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-10-19 22:17:36,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-19 22:17:36,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-10-19 22:17:36,313 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 19 [2020-10-19 22:17:36,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:17:36,313 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-10-19 22:17:36,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-19 22:17:36,313 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-10-19 22:17:36,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-19 22:17:36,314 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:17:36,314 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:17:36,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 22:17:36,515 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:17:36,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:17:36,515 INFO L82 PathProgramCache]: Analyzing trace with hash 634982145, now seen corresponding path program 4 times [2020-10-19 22:17:36,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:17:36,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63667111] [2020-10-19 22:17:36,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:17:36,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 22:17:36,537 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 22:17:36,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 22:17:36,557 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 22:17:36,580 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 22:17:36,580 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-19 22:17:36,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-19 22:17:36,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 10:17:36 BoogieIcfgContainer [2020-10-19 22:17:36,623 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 22:17:36,624 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 22:17:36,624 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 22:17:36,624 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 22:17:36,625 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:17:32" (3/4) ... [2020-10-19 22:17:36,627 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-19 22:17:36,694 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-19 22:17:36,695 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 22:17:36,696 INFO L168 Benchmark]: Toolchain (without parser) took 5164.43 ms. Allocated memory was 34.6 MB in the beginning and 63.4 MB in the end (delta: 28.8 MB). Free memory was 6.6 MB in the beginning and 31.1 MB in the end (delta: -24.5 MB). Peak memory consumption was 4.3 MB. Max. memory is 14.3 GB. [2020-10-19 22:17:36,697 INFO L168 Benchmark]: CDTParser took 0.73 ms. Allocated memory is still 34.1 MB. Free memory was 11.2 MB in the beginning and 11.2 MB in the end (delta: 47.7 kB). Peak memory consumption was 47.7 kB. Max. memory is 14.3 GB. [2020-10-19 22:17:36,698 INFO L168 Benchmark]: CACSL2BoogieTranslator took 394.81 ms. Allocated memory was 36.7 MB in the beginning and 44.6 MB in the end (delta: 7.9 MB). Free memory was 18.5 MB in the beginning and 26.2 MB in the end (delta: -7.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 14.3 GB. [2020-10-19 22:17:36,698 INFO L168 Benchmark]: Boogie Procedure Inliner took 67.01 ms. Allocated memory is still 44.6 MB. Free memory was 26.2 MB in the beginning and 24.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. [2020-10-19 22:17:36,699 INFO L168 Benchmark]: Boogie Preprocessor took 59.03 ms. Allocated memory is still 44.6 MB. Free memory was 24.4 MB in the beginning and 23.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. [2020-10-19 22:17:36,700 INFO L168 Benchmark]: RCFGBuilder took 407.92 ms. Allocated memory was 44.6 MB in the beginning and 46.1 MB in the end (delta: 1.6 MB). Free memory was 22.8 MB in the beginning and 19.7 MB in the end (delta: 3.2 MB). Peak memory consumption was 10.7 MB. Max. memory is 14.3 GB. [2020-10-19 22:17:36,700 INFO L168 Benchmark]: TraceAbstraction took 4141.94 ms. Allocated memory was 46.1 MB in the beginning and 63.4 MB in the end (delta: 17.3 MB). Free memory was 19.2 MB in the beginning and 34.7 MB in the end (delta: -15.5 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. [2020-10-19 22:17:36,701 INFO L168 Benchmark]: Witness Printer took 71.19 ms. Allocated memory is still 63.4 MB. Free memory was 34.7 MB in the beginning and 31.1 MB in the end (delta: 3.6 MB). Peak memory consumption was 3.6 MB. Max. memory is 14.3 GB. [2020-10-19 22:17:36,705 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.73 ms. Allocated memory is still 34.1 MB. Free memory was 11.2 MB in the beginning and 11.2 MB in the end (delta: 47.7 kB). Peak memory consumption was 47.7 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 394.81 ms. Allocated memory was 36.7 MB in the beginning and 44.6 MB in the end (delta: 7.9 MB). Free memory was 18.5 MB in the beginning and 26.2 MB in the end (delta: -7.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 67.01 ms. Allocated memory is still 44.6 MB. Free memory was 26.2 MB in the beginning and 24.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 59.03 ms. Allocated memory is still 44.6 MB. Free memory was 24.4 MB in the beginning and 23.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. * RCFGBuilder took 407.92 ms. Allocated memory was 44.6 MB in the beginning and 46.1 MB in the end (delta: 1.6 MB). Free memory was 22.8 MB in the beginning and 19.7 MB in the end (delta: 3.2 MB). Peak memory consumption was 10.7 MB. Max. memory is 14.3 GB. * TraceAbstraction took 4141.94 ms. Allocated memory was 46.1 MB in the beginning and 63.4 MB in the end (delta: 17.3 MB). Free memory was 19.2 MB in the beginning and 34.7 MB in the end (delta: -15.5 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. * Witness Printer took 71.19 ms. Allocated memory is still 63.4 MB. Free memory was 34.7 MB in the beginning and 31.1 MB in the end (delta: 3.6 MB). Peak memory consumption was 3.6 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L19] int N; VAL [N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) VAL [N=2] [L27] int i; [L28] long long sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] sum[0] = 1 [L32] i=0 VAL [N=2] [L32] COND TRUE i