./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/res2of.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/res2of.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 ab5f5575b4f404d180fabd8e1f95043fb9254d7e ................................................................................................................................................................................................................................................................................................................................................................................... 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 22:15:55,273 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 22:15:55,276 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 22:15:55,306 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 22:15:55,306 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 22:15:55,307 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 22:15:55,308 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 22:15:55,310 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 22:15:55,312 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 22:15:55,313 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 22:15:55,314 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 22:15:55,315 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 22:15:55,315 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 22:15:55,317 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 22:15:55,318 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 22:15:55,319 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 22:15:55,320 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 22:15:55,321 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 22:15:55,323 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 22:15:55,325 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 22:15:55,326 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 22:15:55,328 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 22:15:55,329 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 22:15:55,330 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 22:15:55,333 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 22:15:55,334 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 22:15:55,334 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 22:15:55,342 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 22:15:55,343 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 22:15:55,344 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 22:15:55,344 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 22:15:55,345 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 22:15:55,346 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 22:15:55,346 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 22:15:55,347 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 22:15:55,347 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 22:15:55,348 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 22:15:55,348 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 22:15:55,349 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 22:15:55,349 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 22:15:55,350 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 22:15:55,351 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-19 22:15:55,374 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 22:15:55,374 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 22:15:55,379 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 22:15:55,379 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 22:15:55,379 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 22:15:55,380 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 22:15:55,380 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 22:15:55,380 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 22:15:55,380 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 22:15:55,380 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 22:15:55,380 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-19 22:15:55,381 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 22:15:55,381 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-19 22:15:55,382 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 22:15:55,382 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-19 22:15:55,382 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 22:15:55,382 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-19 22:15:55,383 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 22:15:55,383 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 22:15:55,383 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 22:15:55,383 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 22:15:55,383 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 22:15:55,384 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 22:15:55,384 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 22:15:55,384 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-19 22:15:55,384 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 22:15:55,384 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-19 22:15:55,385 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-19 22:15:55,385 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 22:15:55,386 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 -> ab5f5575b4f404d180fabd8e1f95043fb9254d7e [2020-10-19 22:15:55,601 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 22:15:55,615 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 22:15:55,619 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 22:15:55,620 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 22:15:55,621 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 22:15:55,622 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/res2of.c [2020-10-19 22:15:55,688 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8abb48315/a8ddf8d091d74840bf16a5427b6029e0/FLAGfc63db42c [2020-10-19 22:15:56,176 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 22:15:56,177 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/res2of.c [2020-10-19 22:15:56,190 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8abb48315/a8ddf8d091d74840bf16a5427b6029e0/FLAGfc63db42c [2020-10-19 22:15:56,553 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8abb48315/a8ddf8d091d74840bf16a5427b6029e0 [2020-10-19 22:15:56,565 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 22:15:56,572 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-19 22:15:56,573 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 22:15:56,573 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 22:15:56,578 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 22:15:56,579 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 10:15:56" (1/1) ... [2020-10-19 22:15:56,583 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f950390 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:15:56, skipping insertion in model container [2020-10-19 22:15:56,584 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 10:15:56" (1/1) ... [2020-10-19 22:15:56,593 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 22:15:56,620 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 22:15:56,878 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 22:15:56,889 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 22:15:56,914 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 22:15:56,933 INFO L208 MainTranslator]: Completed translation [2020-10-19 22:15:56,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:15:56 WrapperNode [2020-10-19 22:15:56,934 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 22:15:56,935 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-19 22:15:56,935 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-19 22:15:56,935 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-19 22:15:56,943 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:15:56" (1/1) ... [2020-10-19 22:15:56,954 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:15:56" (1/1) ... [2020-10-19 22:15:56,983 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-19 22:15:56,984 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 22:15:56,984 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 22:15:56,984 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 22:15:56,994 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:15:56" (1/1) ... [2020-10-19 22:15:56,994 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:15:56" (1/1) ... [2020-10-19 22:15:56,997 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:15:56" (1/1) ... [2020-10-19 22:15:56,997 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:15:56" (1/1) ... [2020-10-19 22:15:57,005 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:15:56" (1/1) ... [2020-10-19 22:15:57,012 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:15:56" (1/1) ... [2020-10-19 22:15:57,014 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:15:56" (1/1) ... [2020-10-19 22:15:57,017 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 22:15:57,018 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 22:15:57,018 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 22:15:57,018 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 22:15:57,019 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:15:56" (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 22:15:57,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-19 22:15:57,088 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 22:15:57,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-19 22:15:57,089 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-19 22:15:57,089 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 22:15:57,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 22:15:57,090 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-19 22:15:57,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-19 22:15:57,431 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 22:15:57,431 INFO L298 CfgBuilder]: Removed 16 assume(true) statements. [2020-10-19 22:15:57,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:15:57 BoogieIcfgContainer [2020-10-19 22:15:57,434 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 22:15:57,436 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 22:15:57,436 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 22:15:57,441 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 22:15:57,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 10:15:56" (1/3) ... [2020-10-19 22:15:57,442 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@685059a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 10:15:57, skipping insertion in model container [2020-10-19 22:15:57,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:15:56" (2/3) ... [2020-10-19 22:15:57,443 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@685059a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 10:15:57, skipping insertion in model container [2020-10-19 22:15:57,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:15:57" (3/3) ... [2020-10-19 22:15:57,446 INFO L111 eAbstractionObserver]: Analyzing ICFG res2of.c [2020-10-19 22:15:57,463 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 22:15:57,472 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-19 22:15:57,511 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-19 22:15:57,587 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 22:15:57,587 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-19 22:15:57,587 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 22:15:57,587 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 22:15:57,588 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 22:15:57,588 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 22:15:57,594 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 22:15:57,594 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 22:15:57,614 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-10-19 22:15:57,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-19 22:15:57,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:15:57,623 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:15:57,623 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:15:57,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:15:57,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1780399656, now seen corresponding path program 1 times [2020-10-19 22:15:57,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:15:57,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799269392] [2020-10-19 22:15:57,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:15:57,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:15:57,828 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 22:15:57,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799269392] [2020-10-19 22:15:57,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:15:57,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-19 22:15:57,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449591135] [2020-10-19 22:15:57,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-19 22:15:57,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:15:57,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-19 22:15:57,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-19 22:15:57,864 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 2 states. [2020-10-19 22:15:57,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:15:57,893 INFO L93 Difference]: Finished difference Result 57 states and 83 transitions. [2020-10-19 22:15:57,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-19 22:15:57,896 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2020-10-19 22:15:57,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:15:57,912 INFO L225 Difference]: With dead ends: 57 [2020-10-19 22:15:57,912 INFO L226 Difference]: Without dead ends: 26 [2020-10-19 22:15:57,917 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 22:15:57,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-19 22:15:57,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-19 22:15:57,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-19 22:15:57,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2020-10-19 22:15:57,969 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 19 [2020-10-19 22:15:57,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:15:57,970 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2020-10-19 22:15:57,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-19 22:15:57,970 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2020-10-19 22:15:57,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-19 22:15:57,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:15:57,972 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:15:57,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-19 22:15:57,973 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:15:57,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:15:57,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1279549768, now seen corresponding path program 1 times [2020-10-19 22:15:57,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:15:57,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016469840] [2020-10-19 22:15:57,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:15:58,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:15:58,171 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 22:15:58,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016469840] [2020-10-19 22:15:58,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:15:58,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 22:15:58,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053090511] [2020-10-19 22:15:58,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 22:15:58,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:15:58,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 22:15:58,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-19 22:15:58,181 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 4 states. [2020-10-19 22:15:58,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:15:58,355 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2020-10-19 22:15:58,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 22:15:58,356 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-19 22:15:58,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:15:58,357 INFO L225 Difference]: With dead ends: 57 [2020-10-19 22:15:58,358 INFO L226 Difference]: Without dead ends: 38 [2020-10-19 22:15:58,359 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 22:15:58,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-19 22:15:58,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2020-10-19 22:15:58,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-19 22:15:58,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2020-10-19 22:15:58,368 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 19 [2020-10-19 22:15:58,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:15:58,369 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2020-10-19 22:15:58,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 22:15:58,369 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2020-10-19 22:15:58,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-19 22:15:58,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:15:58,370 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:15:58,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-19 22:15:58,371 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:15:58,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:15:58,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1740145276, now seen corresponding path program 1 times [2020-10-19 22:15:58,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:15:58,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095168974] [2020-10-19 22:15:58,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:15:58,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 22:15:58,519 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 22:15:58,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 22:15:58,576 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 22:15:58,616 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 22:15:58,616 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-19 22:15:58,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-19 22:15:58,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 10:15:58 BoogieIcfgContainer [2020-10-19 22:15:58,690 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 22:15:58,691 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 22:15:58,691 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 22:15:58,691 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 22:15:58,692 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:15:57" (3/4) ... [2020-10-19 22:15:58,699 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-19 22:15:58,817 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-19 22:15:58,818 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 22:15:58,821 INFO L168 Benchmark]: Toolchain (without parser) took 2253.11 ms. Allocated memory was 37.2 MB in the beginning and 49.3 MB in the end (delta: 12.1 MB). Free memory was 19.4 MB in the beginning and 17.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 13.8 MB. Max. memory is 14.3 GB. [2020-10-19 22:15:58,822 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 34.1 MB. Free memory was 11.1 MB in the beginning and 11.0 MB in the end (delta: 45.6 kB). Peak memory consumption was 45.6 kB. Max. memory is 14.3 GB. [2020-10-19 22:15:58,823 INFO L168 Benchmark]: CACSL2BoogieTranslator took 361.43 ms. Allocated memory was 37.2 MB in the beginning and 45.1 MB in the end (delta: 7.9 MB). Free memory was 18.5 MB in the beginning and 26.1 MB in the end (delta: -7.6 MB). Peak memory consumption was 9.3 MB. Max. memory is 14.3 GB. [2020-10-19 22:15:58,823 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.37 ms. Allocated memory is still 45.1 MB. Free memory was 26.1 MB in the beginning and 24.2 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 14.3 GB. [2020-10-19 22:15:58,824 INFO L168 Benchmark]: Boogie Preprocessor took 33.72 ms. Allocated memory is still 45.1 MB. Free memory was 24.2 MB in the beginning and 22.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. [2020-10-19 22:15:58,825 INFO L168 Benchmark]: RCFGBuilder took 416.69 ms. Allocated memory was 45.1 MB in the beginning and 46.7 MB in the end (delta: 1.6 MB). Free memory was 22.5 MB in the beginning and 16.1 MB in the end (delta: 6.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 14.3 GB. [2020-10-19 22:15:58,825 INFO L168 Benchmark]: TraceAbstraction took 1254.27 ms. Allocated memory was 46.7 MB in the beginning and 49.3 MB in the end (delta: 2.6 MB). Free memory was 15.5 MB in the beginning and 22.3 MB in the end (delta: -6.8 MB). There was no memory consumed. Max. memory is 14.3 GB. [2020-10-19 22:15:58,826 INFO L168 Benchmark]: Witness Printer took 127.18 ms. Allocated memory is still 49.3 MB. Free memory was 22.3 MB in the beginning and 17.7 MB in the end (delta: 4.6 MB). Peak memory consumption was 4.6 MB. Max. memory is 14.3 GB. [2020-10-19 22:15:58,831 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 34.1 MB. Free memory was 11.1 MB in the beginning and 11.0 MB in the end (delta: 45.6 kB). Peak memory consumption was 45.6 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 361.43 ms. Allocated memory was 37.2 MB in the beginning and 45.1 MB in the end (delta: 7.9 MB). Free memory was 18.5 MB in the beginning and 26.1 MB in the end (delta: -7.6 MB). Peak memory consumption was 9.3 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 48.37 ms. Allocated memory is still 45.1 MB. Free memory was 26.1 MB in the beginning and 24.2 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 33.72 ms. Allocated memory is still 45.1 MB. Free memory was 24.2 MB in the beginning and 22.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. * RCFGBuilder took 416.69 ms. Allocated memory was 45.1 MB in the beginning and 46.7 MB in the end (delta: 1.6 MB). Free memory was 22.5 MB in the beginning and 16.1 MB in the end (delta: 6.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 14.3 GB. * TraceAbstraction took 1254.27 ms. Allocated memory was 46.7 MB in the beginning and 49.3 MB in the end (delta: 2.6 MB). Free memory was 15.5 MB in the beginning and 22.3 MB in the end (delta: -6.8 MB). There was no memory consumed. Max. memory is 14.3 GB. * Witness Printer took 127.18 ms. Allocated memory is still 49.3 MB. Free memory was 22.3 MB in the beginning and 17.7 MB in the end (delta: 4.6 MB). Peak memory consumption was 4.6 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=1] [L27] int i; [L28] long long sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L30] int *b = malloc(sizeof(int)*N); [L31] int *c = malloc(sizeof(int)*N); [L33] sum[0] = 0 [L34] i=0 VAL [N=1] [L34] COND TRUE i