./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/brs3f.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/brs3f.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 5a6b49f9c2a6d2eda01ab26465c2ce5a73ff1827 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 18:55:35,226 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-25 18:55:35,230 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-25 18:55:35,275 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-25 18:55:35,276 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-25 18:55:35,280 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-25 18:55:35,282 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-25 18:55:35,288 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-25 18:55:35,291 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-25 18:55:35,296 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-25 18:55:35,298 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-25 18:55:35,307 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-25 18:55:35,308 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-25 18:55:35,311 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-25 18:55:35,313 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-25 18:55:35,317 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-25 18:55:35,319 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-25 18:55:35,320 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-25 18:55:35,323 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-25 18:55:35,331 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-25 18:55:35,333 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-25 18:55:35,334 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-25 18:55:35,337 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-25 18:55:35,338 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-25 18:55:35,345 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-25 18:55:35,345 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-25 18:55:35,345 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-25 18:55:35,347 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-25 18:55:35,348 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-25 18:55:35,349 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-25 18:55:35,349 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-25 18:55:35,350 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-25 18:55:35,351 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-25 18:55:35,352 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-25 18:55:35,353 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-25 18:55:35,353 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-25 18:55:35,354 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-25 18:55:35,354 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-25 18:55:35,354 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-25 18:55:35,356 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-25 18:55:35,356 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-25 18:55:35,357 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-25 18:55:35,397 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-25 18:55:35,397 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-25 18:55:35,398 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-25 18:55:35,398 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-25 18:55:35,400 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-25 18:55:35,401 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-25 18:55:35,401 INFO L138 SettingsManager]: * Use SBE=true [2021-08-25 18:55:35,401 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-25 18:55:35,402 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-25 18:55:35,402 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-25 18:55:35,403 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-25 18:55:35,403 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-25 18:55:35,403 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-25 18:55:35,403 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-25 18:55:35,403 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-25 18:55:35,404 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-25 18:55:35,404 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-25 18:55:35,404 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-25 18:55:35,404 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-25 18:55:35,404 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-25 18:55:35,405 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-25 18:55:35,405 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-25 18:55:35,405 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-25 18:55:35,405 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-25 18:55:35,405 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-25 18:55:35,406 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-25 18:55:35,406 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-25 18:55:35,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-25 18:55:35,406 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-25 18:55:35,406 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-25 18:55:35,407 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5a6b49f9c2a6d2eda01ab26465c2ce5a73ff1827 [2021-08-25 18:55:35,717 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-25 18:55:35,736 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-25 18:55:35,739 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-25 18:55:35,740 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-25 18:55:35,741 INFO L275 PluginConnector]: CDTParser initialized [2021-08-25 18:55:35,742 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/brs3f.c [2021-08-25 18:55:35,805 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2eae69120/0807175f714c40f1862ff3e7b7645969/FLAG0ff5abede [2021-08-25 18:55:36,338 INFO L306 CDTParser]: Found 1 translation units. [2021-08-25 18:55:36,339 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/brs3f.c [2021-08-25 18:55:36,346 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2eae69120/0807175f714c40f1862ff3e7b7645969/FLAG0ff5abede [2021-08-25 18:55:36,807 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2eae69120/0807175f714c40f1862ff3e7b7645969 [2021-08-25 18:55:36,809 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-25 18:55:36,816 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-25 18:55:36,819 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-25 18:55:36,820 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-25 18:55:36,823 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-25 18:55:36,824 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 06:55:36" (1/1) ... [2021-08-25 18:55:36,826 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78404782 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:55:36, skipping insertion in model container [2021-08-25 18:55:36,826 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 06:55:36" (1/1) ... [2021-08-25 18:55:36,832 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-25 18:55:36,845 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-25 18:55:36,985 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/brs3f.c[588,601] [2021-08-25 18:55:37,001 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 18:55:37,008 INFO L203 MainTranslator]: Completed pre-run [2021-08-25 18:55:37,018 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/brs3f.c[588,601] [2021-08-25 18:55:37,026 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 18:55:37,038 INFO L208 MainTranslator]: Completed translation [2021-08-25 18:55:37,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:55:37 WrapperNode [2021-08-25 18:55:37,056 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-25 18:55:37,058 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-25 18:55:37,060 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-25 18:55:37,061 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-25 18:55:37,080 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:55:37" (1/1) ... [2021-08-25 18:55:37,095 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:55:37" (1/1) ... [2021-08-25 18:55:37,112 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-25 18:55:37,113 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-25 18:55:37,113 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-25 18:55:37,113 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-25 18:55:37,120 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:55:37" (1/1) ... [2021-08-25 18:55:37,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:55:37" (1/1) ... [2021-08-25 18:55:37,122 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:55:37" (1/1) ... [2021-08-25 18:55:37,123 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:55:37" (1/1) ... [2021-08-25 18:55:37,127 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:55:37" (1/1) ... [2021-08-25 18:55:37,131 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:55:37" (1/1) ... [2021-08-25 18:55:37,133 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:55:37" (1/1) ... [2021-08-25 18:55:37,134 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-25 18:55:37,135 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-25 18:55:37,136 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-25 18:55:37,136 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-25 18:55:37,137 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:55:37" (1/1) ... [2021-08-25 18:55:37,143 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-25 18:55:37,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 18:55:37,206 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 18:55:37,246 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 18:55:37,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-25 18:55:37,265 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-25 18:55:37,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-25 18:55:37,266 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-25 18:55:37,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-25 18:55:37,266 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-25 18:55:37,267 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-25 18:55:37,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-25 18:55:37,635 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-25 18:55:37,635 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-08-25 18:55:37,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 06:55:37 BoogieIcfgContainer [2021-08-25 18:55:37,637 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-25 18:55:37,638 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-25 18:55:37,638 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-25 18:55:37,641 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-25 18:55:37,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.08 06:55:36" (1/3) ... [2021-08-25 18:55:37,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8af12f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 06:55:37, skipping insertion in model container [2021-08-25 18:55:37,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:55:37" (2/3) ... [2021-08-25 18:55:37,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8af12f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 06:55:37, skipping insertion in model container [2021-08-25 18:55:37,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 06:55:37" (3/3) ... [2021-08-25 18:55:37,644 INFO L111 eAbstractionObserver]: Analyzing ICFG brs3f.c [2021-08-25 18:55:37,665 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-25 18:55:37,665 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-25 18:55:37,717 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-25 18:55:37,725 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 18:55:37,726 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-25 18:55:37,741 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 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 18:55:37,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-25 18:55:37,746 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 18:55:37,746 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 18:55:37,748 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 18:55:37,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 18:55:37,754 INFO L82 PathProgramCache]: Analyzing trace with hash 361760665, now seen corresponding path program 1 times [2021-08-25 18:55:37,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 18:55:37,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714893381] [2021-08-25 18:55:37,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 18:55:37,764 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 18:55:37,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 18:55:37,938 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 18:55:37,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 18:55:37,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714893381] [2021-08-25 18:55:37,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714893381] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 18:55:37,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 18:55:37,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-25 18:55:37,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830940755] [2021-08-25 18:55:37,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-25 18:55:37,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 18:55:37,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-25 18:55:37,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-25 18:55:37,967 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 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) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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 18:55:37,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 18:55:37,985 INFO L93 Difference]: Finished difference Result 36 states and 50 transitions. [2021-08-25 18:55:37,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-25 18:55:37,987 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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 11 [2021-08-25 18:55:37,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 18:55:37,995 INFO L225 Difference]: With dead ends: 36 [2021-08-25 18:55:37,995 INFO L226 Difference]: Without dead ends: 16 [2021-08-25 18:55:37,998 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 18:55:38,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-08-25 18:55:38,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-08-25 18:55:38,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 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 18:55:38,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-08-25 18:55:38,026 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 11 [2021-08-25 18:55:38,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 18:55:38,027 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-08-25 18:55:38,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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 18:55:38,028 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-08-25 18:55:38,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-25 18:55:38,028 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 18:55:38,028 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 18:55:38,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-25 18:55:38,029 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 18:55:38,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 18:55:38,032 INFO L82 PathProgramCache]: Analyzing trace with hash -447913662, now seen corresponding path program 1 times [2021-08-25 18:55:38,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 18:55:38,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114828803] [2021-08-25 18:55:38,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 18:55:38,033 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 18:55:38,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 18:55:38,185 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 18:55:38,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 18:55:38,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114828803] [2021-08-25 18:55:38,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114828803] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 18:55:38,190 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 18:55:38,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-25 18:55:38,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550214445] [2021-08-25 18:55:38,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-25 18:55:38,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 18:55:38,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-25 18:55:38,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-25 18:55:38,194 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 18:55:38,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 18:55:38,264 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2021-08-25 18:55:38,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-25 18:55:38,265 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 11 [2021-08-25 18:55:38,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 18:55:38,266 INFO L225 Difference]: With dead ends: 33 [2021-08-25 18:55:38,266 INFO L226 Difference]: Without dead ends: 22 [2021-08-25 18:55:38,267 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-25 18:55:38,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-08-25 18:55:38,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2021-08-25 18:55:38,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 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 18:55:38,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-08-25 18:55:38,272 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 11 [2021-08-25 18:55:38,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 18:55:38,273 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-08-25 18:55:38,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 18:55:38,273 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-08-25 18:55:38,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-25 18:55:38,274 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 18:55:38,274 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 18:55:38,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-25 18:55:38,275 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 18:55:38,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 18:55:38,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1044113915, now seen corresponding path program 1 times [2021-08-25 18:55:38,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 18:55:38,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225307043] [2021-08-25 18:55:38,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 18:55:38,276 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 18:55:38,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 18:55:38,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-25 18:55:38,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 18:55:38,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225307043] [2021-08-25 18:55:38,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225307043] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 18:55:38,366 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 18:55:38,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-25 18:55:38,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886746546] [2021-08-25 18:55:38,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-25 18:55:38,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 18:55:38,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-25 18:55:38,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-25 18:55:38,368 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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 18:55:38,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 18:55:38,430 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2021-08-25 18:55:38,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-25 18:55:38,431 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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 17 [2021-08-25 18:55:38,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 18:55:38,432 INFO L225 Difference]: With dead ends: 27 [2021-08-25 18:55:38,432 INFO L226 Difference]: Without dead ends: 23 [2021-08-25 18:55:38,432 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 23.9ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-25 18:55:38,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-08-25 18:55:38,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2021-08-25 18:55:38,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 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 18:55:38,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-08-25 18:55:38,436 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 17 [2021-08-25 18:55:38,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 18:55:38,436 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-08-25 18:55:38,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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 18:55:38,437 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-08-25 18:55:38,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-25 18:55:38,437 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 18:55:38,437 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 18:55:38,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-25 18:55:38,438 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 18:55:38,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 18:55:38,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1654199858, now seen corresponding path program 1 times [2021-08-25 18:55:38,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 18:55:38,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657618212] [2021-08-25 18:55:38,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 18:55:38,439 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 18:55:38,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 18:55:38,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 18:55:38,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 18:55:38,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657618212] [2021-08-25 18:55:38,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657618212] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 18:55:38,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466072841] [2021-08-25 18:55:38,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 18:55:38,548 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 18:55:38,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 18:55:38,569 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 18:55:38,578 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 18:55:38,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 18:55:38,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-25 18:55:38,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 18:55:38,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 18:55:38,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466072841] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 18:55:38,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-25 18:55:38,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-25 18:55:38,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583381262] [2021-08-25 18:55:38,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-25 18:55:38,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 18:55:38,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-25 18:55:38,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-25 18:55:38,889 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 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 18:55:39,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 18:55:39,007 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2021-08-25 18:55:39,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-25 18:55:39,008 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 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 20 [2021-08-25 18:55:39,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 18:55:39,009 INFO L225 Difference]: With dead ends: 43 [2021-08-25 18:55:39,009 INFO L226 Difference]: Without dead ends: 29 [2021-08-25 18:55:39,009 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 108.2ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-08-25 18:55:39,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-08-25 18:55:39,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2021-08-25 18:55:39,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 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 18:55:39,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-08-25 18:55:39,013 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 20 [2021-08-25 18:55:39,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 18:55:39,014 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-08-25 18:55:39,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 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 18:55:39,014 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-08-25 18:55:39,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-25 18:55:39,014 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 18:55:39,014 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 18:55:39,043 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 18:55:39,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 18:55:39,229 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 18:55:39,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 18:55:39,230 INFO L82 PathProgramCache]: Analyzing trace with hash 168847774, now seen corresponding path program 1 times [2021-08-25 18:55:39,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 18:55:39,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050097834] [2021-08-25 18:55:39,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 18:55:39,230 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 18:55:39,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-25 18:55:39,293 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-25 18:55:39,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-25 18:55:39,367 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-25 18:55:39,368 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-25 18:55:39,369 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-25 18:55:39,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-25 18:55:39,377 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-25 18:55:39,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.08 06:55:39 BoogieIcfgContainer [2021-08-25 18:55:39,408 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-25 18:55:39,409 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-25 18:55:39,409 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-25 18:55:39,409 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-25 18:55:39,410 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 06:55:37" (3/4) ... [2021-08-25 18:55:39,411 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-25 18:55:39,457 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-25 18:55:39,457 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-25 18:55:39,459 INFO L168 Benchmark]: Toolchain (without parser) took 2642.72 ms. Allocated memory was 48.2 MB in the beginning and 71.3 MB in the end (delta: 23.1 MB). Free memory was 24.3 MB in the beginning and 53.6 MB in the end (delta: -29.3 MB). Peak memory consumption was 18.8 MB. Max. memory is 16.1 GB. [2021-08-25 18:55:39,459 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 48.2 MB. Free memory was 31.0 MB in the beginning and 31.0 MB in the end (delta: 39.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 18:55:39,460 INFO L168 Benchmark]: CACSL2BoogieTranslator took 237.96 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 24.2 MB in the beginning and 43.8 MB in the end (delta: -19.6 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. [2021-08-25 18:55:39,461 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.19 ms. Allocated memory is still 58.7 MB. Free memory was 43.8 MB in the beginning and 42.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-25 18:55:39,461 INFO L168 Benchmark]: Boogie Preprocessor took 21.71 ms. Allocated memory is still 58.7 MB. Free memory was 42.2 MB in the beginning and 41.1 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 18:55:39,462 INFO L168 Benchmark]: RCFGBuilder took 501.45 ms. Allocated memory is still 58.7 MB. Free memory was 41.0 MB in the beginning and 37.1 MB in the end (delta: 3.9 MB). Peak memory consumption was 16.1 MB. Max. memory is 16.1 GB. [2021-08-25 18:55:39,462 INFO L168 Benchmark]: TraceAbstraction took 1770.01 ms. Allocated memory was 58.7 MB in the beginning and 71.3 MB in the end (delta: 12.6 MB). Free memory was 36.7 MB in the beginning and 31.3 MB in the end (delta: 5.4 MB). Peak memory consumption was 17.7 MB. Max. memory is 16.1 GB. [2021-08-25 18:55:39,463 INFO L168 Benchmark]: Witness Printer took 48.54 ms. Allocated memory is still 71.3 MB. Free memory was 31.3 MB in the beginning and 53.6 MB in the end (delta: -22.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-25 18:55:39,466 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 48.2 MB. Free memory was 31.0 MB in the beginning and 31.0 MB in the end (delta: 39.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 237.96 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 24.2 MB in the beginning and 43.8 MB in the end (delta: -19.6 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 54.19 ms. Allocated memory is still 58.7 MB. Free memory was 43.8 MB in the beginning and 42.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.71 ms. Allocated memory is still 58.7 MB. Free memory was 42.2 MB in the beginning and 41.1 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 501.45 ms. Allocated memory is still 58.7 MB. Free memory was 41.0 MB in the beginning and 37.1 MB in the end (delta: 3.9 MB). Peak memory consumption was 16.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1770.01 ms. Allocated memory was 58.7 MB in the beginning and 71.3 MB in the end (delta: 12.6 MB). Free memory was 36.7 MB in the beginning and 31.3 MB in the end (delta: 5.4 MB). Peak memory consumption was 17.7 MB. Max. memory is 16.1 GB. * Witness Printer took 48.54 ms. Allocated memory is still 71.3 MB. Free memory was 31.3 MB in the beginning and 53.6 MB in the end (delta: -22.3 MB). Peak memory consumption was 4.2 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=2] [L27] int i; [L28] long long sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] i=0 VAL [N=2] [L31] COND TRUE i