./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/condgf.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec 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_1.5.800.v20200727-1323.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/condgf.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 fc9306c2ddc48de21e392013ec7086bf0d234b29 ...................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.2.1-dev-20ed64e [2021-08-25 19:02:33,191 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-25 19:02:33,194 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-25 19:02:33,235 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-25 19:02:33,235 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-25 19:02:33,238 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-25 19:02:33,240 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-25 19:02:33,245 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-25 19:02:33,248 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-25 19:02:33,252 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-25 19:02:33,254 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-25 19:02:33,258 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-25 19:02:33,258 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-25 19:02:33,261 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-25 19:02:33,262 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-25 19:02:33,265 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-25 19:02:33,267 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-25 19:02:33,270 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-25 19:02:33,273 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-25 19:02:33,278 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-25 19:02:33,280 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-25 19:02:33,281 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-25 19:02:33,282 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-25 19:02:33,283 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-25 19:02:33,289 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-25 19:02:33,290 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-25 19:02:33,290 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-25 19:02:33,292 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-25 19:02:33,292 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-25 19:02:33,293 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-25 19:02:33,293 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-25 19:02:33,294 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-25 19:02:33,296 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-25 19:02:33,296 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-25 19:02:33,297 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-25 19:02:33,298 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-25 19:02:33,298 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-25 19:02:33,299 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-25 19:02:33,299 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-25 19:02:33,300 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-25 19:02:33,301 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-25 19:02:33,305 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-25 19:02:33,341 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-25 19:02:33,341 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-25 19:02:33,343 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-25 19:02:33,343 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-25 19:02:33,345 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-25 19:02:33,345 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-25 19:02:33,345 INFO L138 SettingsManager]: * Use SBE=true [2021-08-25 19:02:33,346 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-25 19:02:33,346 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-25 19:02:33,346 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-25 19:02:33,347 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-25 19:02:33,347 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-25 19:02:33,347 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-25 19:02:33,347 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-25 19:02:33,348 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-25 19:02:33,348 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-25 19:02:33,348 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-25 19:02:33,348 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-25 19:02:33,348 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-25 19:02:33,349 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-25 19:02:33,349 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-25 19:02:33,360 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-25 19:02:33,360 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-25 19:02:33,361 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-25 19:02:33,361 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-25 19:02:33,361 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-25 19:02:33,361 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-25 19:02:33,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-25 19:02:33,361 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-25 19:02:33,362 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-25 19:02:33,362 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fc9306c2ddc48de21e392013ec7086bf0d234b29 [2021-08-25 19:02:33,739 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-25 19:02:33,764 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-25 19:02:33,768 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-25 19:02:33,769 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-25 19:02:33,770 INFO L275 PluginConnector]: CDTParser initialized [2021-08-25 19:02:33,771 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/condgf.c [2021-08-25 19:02:33,845 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/180fd4728/420b4a511a1940b0bc13b7214ce10bb7/FLAG46d33feee [2021-08-25 19:02:34,277 INFO L306 CDTParser]: Found 1 translation units. [2021-08-25 19:02:34,278 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/condgf.c [2021-08-25 19:02:34,284 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/180fd4728/420b4a511a1940b0bc13b7214ce10bb7/FLAG46d33feee [2021-08-25 19:02:34,672 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/180fd4728/420b4a511a1940b0bc13b7214ce10bb7 [2021-08-25 19:02:34,674 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-25 19:02:34,677 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-25 19:02:34,680 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-25 19:02:34,681 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-25 19:02:34,684 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-25 19:02:34,685 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 07:02:34" (1/1) ... [2021-08-25 19:02:34,686 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@287277a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:02:34, skipping insertion in model container [2021-08-25 19:02:34,686 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 07:02:34" (1/1) ... [2021-08-25 19:02:34,693 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-25 19:02:34,706 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-25 19:02:34,823 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/condgf.c[589,602] [2021-08-25 19:02:34,847 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 19:02:34,856 INFO L203 MainTranslator]: Completed pre-run [2021-08-25 19:02:34,869 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/condgf.c[589,602] [2021-08-25 19:02:34,895 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 19:02:34,919 INFO L208 MainTranslator]: Completed translation [2021-08-25 19:02:34,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:02:34 WrapperNode [2021-08-25 19:02:34,923 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-25 19:02:34,924 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-25 19:02:34,925 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-25 19:02:34,925 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-25 19:02:34,931 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:02:34" (1/1) ... [2021-08-25 19:02:34,952 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:02:34" (1/1) ... [2021-08-25 19:02:34,977 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-25 19:02:34,978 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-25 19:02:34,978 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-25 19:02:34,979 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-25 19:02:34,985 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:02:34" (1/1) ... [2021-08-25 19:02:34,985 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:02:34" (1/1) ... [2021-08-25 19:02:34,990 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:02:34" (1/1) ... [2021-08-25 19:02:34,990 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:02:34" (1/1) ... [2021-08-25 19:02:35,007 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:02:34" (1/1) ... [2021-08-25 19:02:35,012 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:02:34" (1/1) ... [2021-08-25 19:02:35,018 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:02:34" (1/1) ... [2021-08-25 19:02:35,021 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-25 19:02:35,023 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-25 19:02:35,024 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-25 19:02:35,024 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-25 19:02:35,024 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:02:34" (1/1) ... [2021-08-25 19:02:35,031 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-25 19:02:35,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:02:35,059 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-25 19:02:35,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-25 19:02:35,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-25 19:02:35,101 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-25 19:02:35,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-25 19:02:35,102 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-25 19:02:35,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-25 19:02:35,102 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-25 19:02:35,102 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-25 19:02:35,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-25 19:02:35,449 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-25 19:02:35,459 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-08-25 19:02:35,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 07:02:35 BoogieIcfgContainer [2021-08-25 19:02:35,461 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-25 19:02:35,462 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-25 19:02:35,463 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-25 19:02:35,465 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-25 19:02:35,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.08 07:02:34" (1/3) ... [2021-08-25 19:02:35,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75b50e3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 07:02:35, skipping insertion in model container [2021-08-25 19:02:35,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:02:34" (2/3) ... [2021-08-25 19:02:35,474 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75b50e3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 07:02:35, skipping insertion in model container [2021-08-25 19:02:35,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 07:02:35" (3/3) ... [2021-08-25 19:02:35,476 INFO L111 eAbstractionObserver]: Analyzing ICFG condgf.c [2021-08-25 19:02:35,480 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-25 19:02:35,481 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-25 19:02:35,550 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-25 19:02:35,556 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-25 19:02:35,556 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-25 19:02:35,568 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 23 states have (on average 1.565217391304348) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:02:35,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-25 19:02:35,572 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:02:35,573 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:02:35,573 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:02:35,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:02:35,578 INFO L82 PathProgramCache]: Analyzing trace with hash -592817118, now seen corresponding path program 1 times [2021-08-25 19:02:35,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:02:35,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380889482] [2021-08-25 19:02:35,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:02:35,587 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:02:35,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:02:35,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:02:35,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:02:35,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380889482] [2021-08-25 19:02:35,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380889482] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 19:02:35,747 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:02:35,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-25 19:02:35,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737587208] [2021-08-25 19:02:35,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-25 19:02:35,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:02:35,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-25 19:02:35,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-25 19:02:35,778 INFO L87 Difference]: Start difference. First operand has 25 states, 23 states have (on average 1.565217391304348) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:02:35,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:02:35,798 INFO L93 Difference]: Finished difference Result 46 states and 66 transitions. [2021-08-25 19:02:35,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-25 19:02:35,800 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-25 19:02:35,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:02:35,806 INFO L225 Difference]: With dead ends: 46 [2021-08-25 19:02:35,806 INFO L226 Difference]: Without dead ends: 21 [2021-08-25 19:02:35,809 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-25 19:02:35,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-08-25 19:02:35,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-08-25 19:02:35,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:02:35,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-08-25 19:02:35,837 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2021-08-25 19:02:35,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:02:35,838 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-08-25 19:02:35,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:02:35,839 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-08-25 19:02:35,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-25 19:02:35,840 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:02:35,840 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:02:35,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-25 19:02:35,841 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:02:35,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:02:35,845 INFO L82 PathProgramCache]: Analyzing trace with hash 108247460, now seen corresponding path program 1 times [2021-08-25 19:02:35,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:02:35,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277473111] [2021-08-25 19:02:35,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:02:35,846 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:02:35,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:02:35,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:02:35,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:02:35,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277473111] [2021-08-25 19:02:35,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277473111] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 19:02:35,983 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:02:35,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-25 19:02:35,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538569347] [2021-08-25 19:02:35,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-25 19:02:35,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:02:35,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-25 19:02:35,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-25 19:02:35,988 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:02:36,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:02:36,111 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2021-08-25 19:02:36,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-25 19:02:36,112 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-25 19:02:36,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:02:36,113 INFO L225 Difference]: With dead ends: 48 [2021-08-25 19:02:36,113 INFO L226 Difference]: Without dead ends: 34 [2021-08-25 19:02:36,114 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-25 19:02:36,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-08-25 19:02:36,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 24. [2021-08-25 19:02:36,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:02:36,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-08-25 19:02:36,127 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 14 [2021-08-25 19:02:36,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:02:36,128 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-08-25 19:02:36,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:02:36,128 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-08-25 19:02:36,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-25 19:02:36,130 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:02:36,130 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:02:36,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-25 19:02:36,131 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:02:36,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:02:36,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1242970242, now seen corresponding path program 1 times [2021-08-25 19:02:36,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:02:36,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288930379] [2021-08-25 19:02:36,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:02:36,133 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:02:36,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:02:36,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:02:36,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:02:36,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288930379] [2021-08-25 19:02:36,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288930379] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:02:36,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046147873] [2021-08-25 19:02:36,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:02:36,677 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:02:36,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:02:36,682 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 19:02:36,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-25 19:02:36,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:02:36,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-25 19:02:36,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:02:36,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-08-25 19:02:36,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2021-08-25 19:02:36,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:02:36,915 INFO L388 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 [2021-08-25 19:02:37,349 INFO L354 Elim1Store]: treesize reduction 39, result has 15.2 percent of original size [2021-08-25 19:02:37,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 27 [2021-08-25 19:02:37,598 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-25 19:02:37,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-08-25 19:02:37,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:02:37,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046147873] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:02:37,649 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-25 19:02:37,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-25 19:02:37,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33607572] [2021-08-25 19:02:37,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-25 19:02:37,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:02:37,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-25 19:02:37,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-08-25 19:02:37,655 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:02:38,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:02:38,038 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2021-08-25 19:02:38,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-25 19:02:38,039 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-25 19:02:38,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:02:38,042 INFO L225 Difference]: With dead ends: 57 [2021-08-25 19:02:38,043 INFO L226 Difference]: Without dead ends: 47 [2021-08-25 19:02:38,044 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 593.6ms TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-08-25 19:02:38,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-08-25 19:02:38,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2021-08-25 19:02:38,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:02:38,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2021-08-25 19:02:38,061 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 21 [2021-08-25 19:02:38,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:02:38,061 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2021-08-25 19:02:38,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:02:38,061 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2021-08-25 19:02:38,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-25 19:02:38,063 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:02:38,063 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:02:38,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-25 19:02:38,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:02:38,287 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:02:38,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:02:38,288 INFO L82 PathProgramCache]: Analyzing trace with hash 532037120, now seen corresponding path program 1 times [2021-08-25 19:02:38,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:02:38,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123686013] [2021-08-25 19:02:38,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:02:38,288 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:02:38,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-25 19:02:38,330 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-25 19:02:38,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-25 19:02:38,392 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-25 19:02:38,393 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-25 19:02:38,394 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-25 19:02:38,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-25 19:02:38,404 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-25 19:02:38,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.08 07:02:38 BoogieIcfgContainer [2021-08-25 19:02:38,429 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-25 19:02:38,430 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-25 19:02:38,430 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-25 19:02:38,430 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-25 19:02:38,431 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 07:02:35" (3/4) ... [2021-08-25 19:02:38,432 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-25 19:02:38,467 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-25 19:02:38,468 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-25 19:02:38,468 INFO L168 Benchmark]: Toolchain (without parser) took 3791.73 ms. Allocated memory was 69.2 MB in the beginning and 83.9 MB in the end (delta: 14.7 MB). Free memory was 51.1 MB in the beginning and 52.5 MB in the end (delta: -1.4 MB). Peak memory consumption was 12.5 MB. Max. memory is 16.1 GB. [2021-08-25 19:02:38,469 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 69.2 MB. Free memory was 50.3 MB in the beginning and 50.3 MB in the end (delta: 54.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 19:02:38,469 INFO L168 Benchmark]: CACSL2BoogieTranslator took 243.36 ms. Allocated memory is still 69.2 MB. Free memory was 50.9 MB in the beginning and 52.6 MB in the end (delta: -1.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 16.1 GB. [2021-08-25 19:02:38,469 INFO L168 Benchmark]: Boogie Procedure Inliner took 53.41 ms. Allocated memory is still 69.2 MB. Free memory was 52.6 MB in the beginning and 51.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-25 19:02:38,470 INFO L168 Benchmark]: Boogie Preprocessor took 43.65 ms. Allocated memory is still 69.2 MB. Free memory was 50.8 MB in the beginning and 49.7 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 19:02:38,470 INFO L168 Benchmark]: RCFGBuilder took 438.57 ms. Allocated memory is still 69.2 MB. Free memory was 49.5 MB in the beginning and 33.3 MB in the end (delta: 16.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-08-25 19:02:38,470 INFO L168 Benchmark]: TraceAbstraction took 2966.36 ms. Allocated memory was 69.2 MB in the beginning and 83.9 MB in the end (delta: 14.7 MB). Free memory was 32.8 MB in the beginning and 55.3 MB in the end (delta: -22.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 19:02:38,471 INFO L168 Benchmark]: Witness Printer took 37.53 ms. Allocated memory is still 83.9 MB. Free memory was 55.3 MB in the beginning and 52.5 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-25 19:02:38,473 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 69.2 MB. Free memory was 50.3 MB in the beginning and 50.3 MB in the end (delta: 54.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 243.36 ms. Allocated memory is still 69.2 MB. Free memory was 50.9 MB in the beginning and 52.6 MB in the end (delta: -1.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 53.41 ms. Allocated memory is still 69.2 MB. Free memory was 52.6 MB in the beginning and 51.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 43.65 ms. Allocated memory is still 69.2 MB. Free memory was 50.8 MB in the beginning and 49.7 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 438.57 ms. Allocated memory is still 69.2 MB. Free memory was 49.5 MB in the beginning and 33.3 MB in the end (delta: 16.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2966.36 ms. Allocated memory was 69.2 MB in the beginning and 83.9 MB in the end (delta: 14.7 MB). Free memory was 32.8 MB in the beginning and 55.3 MB in the end (delta: -22.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 37.53 ms. Allocated memory is still 83.9 MB. Free memory was 55.3 MB in the beginning and 52.5 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_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); [L31] sum[0] = 0 [L32] i=0 VAL [N=1] [L32] COND TRUE i