./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-properties/simple-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df485ec6-0b37-4396-9847-96ab202c1b93/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df485ec6-0b37-4396-9847-96ab202c1b93/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df485ec6-0b37-4396-9847-96ab202c1b93/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df485ec6-0b37-4396-9847-96ab202c1b93/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-properties/simple-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df485ec6-0b37-4396-9847-96ab202c1b93/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df485ec6-0b37-4396-9847-96ab202c1b93/bin/utaipan-WLngWcDbfI --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash af4b28e958de4f654443dbaa4f0a24d91f735460 .................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.2.0-7b2dab5 [2021-10-11 02:31:07,938 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:31:07,941 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:31:07,973 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:31:07,973 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:31:07,975 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:31:07,977 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:31:07,980 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:31:07,982 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:31:07,984 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:31:07,985 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:31:07,987 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:31:07,987 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:31:07,989 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:31:07,990 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:31:07,992 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:31:07,993 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:31:07,995 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:31:07,997 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:31:07,999 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:31:08,001 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:31:08,003 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:31:08,005 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:31:08,006 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:31:08,010 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:31:08,010 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:31:08,011 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:31:08,012 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:31:08,013 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:31:08,014 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:31:08,015 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:31:08,016 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:31:08,017 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:31:08,019 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:31:08,020 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:31:08,021 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:31:08,022 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:31:08,022 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:31:08,023 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:31:08,024 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:31:08,025 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:31:08,027 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df485ec6-0b37-4396-9847-96ab202c1b93/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:31:08,053 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:31:08,054 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:31:08,055 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:31:08,055 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:31:08,056 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:31:08,056 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:31:08,056 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:31:08,057 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:31:08,057 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:31:08,057 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:31:08,058 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:31:08,058 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:31:08,058 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:31:08,059 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:31:08,059 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:31:08,060 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:31:08,060 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:31:08,060 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:31:08,061 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:31:08,061 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:31:08,061 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:31:08,062 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:31:08,062 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:31:08,062 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:31:08,063 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:31:08,063 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:31:08,063 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:31:08,064 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:31:08,064 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:31:08,064 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:31:08,065 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:31:08,065 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:31:08,065 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:31:08,066 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:31:08,066 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:31:08,066 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:31:08,067 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:31:08,067 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:31:08,067 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:31:08,068 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df485ec6-0b37-4396-9847-96ab202c1b93/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df485ec6-0b37-4396-9847-96ab202c1b93/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> af4b28e958de4f654443dbaa4f0a24d91f735460 [2021-10-11 02:31:08,321 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:31:08,354 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:31:08,359 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:31:08,361 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:31:08,361 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:31:08,363 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df485ec6-0b37-4396-9847-96ab202c1b93/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/list-properties/simple-1.i [2021-10-11 02:31:08,455 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df485ec6-0b37-4396-9847-96ab202c1b93/bin/utaipan-WLngWcDbfI/data/42bd8153c/88d20e1549024f4184ecb5d0287b00fd/FLAG8f40fc3a8 [2021-10-11 02:31:09,093 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:31:09,094 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df485ec6-0b37-4396-9847-96ab202c1b93/sv-benchmarks/c/list-properties/simple-1.i [2021-10-11 02:31:09,109 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df485ec6-0b37-4396-9847-96ab202c1b93/bin/utaipan-WLngWcDbfI/data/42bd8153c/88d20e1549024f4184ecb5d0287b00fd/FLAG8f40fc3a8 [2021-10-11 02:31:09,409 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df485ec6-0b37-4396-9847-96ab202c1b93/bin/utaipan-WLngWcDbfI/data/42bd8153c/88d20e1549024f4184ecb5d0287b00fd [2021-10-11 02:31:09,412 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:31:09,415 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:31:09,419 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:31:09,419 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:31:09,423 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:31:09,425 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:31:09" (1/1) ... [2021-10-11 02:31:09,427 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55c809bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:09, skipping insertion in model container [2021-10-11 02:31:09,427 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:31:09" (1/1) ... [2021-10-11 02:31:09,436 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:31:09,506 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:31:09,993 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df485ec6-0b37-4396-9847-96ab202c1b93/sv-benchmarks/c/list-properties/simple-1.i[23237,23250] [2021-10-11 02:31:10,001 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:31:10,014 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:31:10,073 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df485ec6-0b37-4396-9847-96ab202c1b93/sv-benchmarks/c/list-properties/simple-1.i[23237,23250] [2021-10-11 02:31:10,074 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:31:10,141 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:31:10,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:10 WrapperNode [2021-10-11 02:31:10,143 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:31:10,144 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:31:10,145 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:31:10,145 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:31:10,154 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:10" (1/1) ... [2021-10-11 02:31:10,187 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:10" (1/1) ... [2021-10-11 02:31:10,218 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:31:10,220 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:31:10,221 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:31:10,221 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:31:10,231 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:10" (1/1) ... [2021-10-11 02:31:10,232 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:10" (1/1) ... [2021-10-11 02:31:10,248 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:10" (1/1) ... [2021-10-11 02:31:10,250 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:10" (1/1) ... [2021-10-11 02:31:10,258 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:10" (1/1) ... [2021-10-11 02:31:10,271 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:10" (1/1) ... [2021-10-11 02:31:10,276 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:10" (1/1) ... [2021-10-11 02:31:10,285 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:31:10,298 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:31:10,299 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:31:10,299 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:31:10,300 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:10" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df485ec6-0b37-4396-9847-96ab202c1b93/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:31:10,405 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-11 02:31:10,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-11 02:31:10,406 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-11 02:31:10,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-11 02:31:10,406 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:31:10,407 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-11 02:31:10,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:31:10,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:31:10,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:31:10,988 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:31:10,989 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-11 02:31:10,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:31:10 BoogieIcfgContainer [2021-10-11 02:31:10,991 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:31:10,993 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:31:10,993 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:31:11,000 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:31:11,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:31:09" (1/3) ... [2021-10-11 02:31:11,002 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69332d31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:31:11, skipping insertion in model container [2021-10-11 02:31:11,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:10" (2/3) ... [2021-10-11 02:31:11,003 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69332d31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:31:11, skipping insertion in model container [2021-10-11 02:31:11,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:31:10" (3/3) ... [2021-10-11 02:31:11,005 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-1.i [2021-10-11 02:31:11,025 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:31:11,030 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:31:11,042 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:31:11,081 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:31:11,082 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:31:11,082 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:31:11,082 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:31:11,082 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:31:11,083 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:31:11,083 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:31:11,083 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:31:11,100 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2021-10-11 02:31:11,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-11 02:31:11,105 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:11,106 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:31:11,108 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:31:11,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:11,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1849667143, now seen corresponding path program 1 times [2021-10-11 02:31:11,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:11,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422154561] [2021-10-11 02:31:11,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:11,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:11,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:31:11,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422154561] [2021-10-11 02:31:11,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:31:11,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:31:11,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301511403] [2021-10-11 02:31:11,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-10-11 02:31:11,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:11,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-11 02:31:11,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 02:31:11,385 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 2 states. [2021-10-11 02:31:11,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:11,405 INFO L93 Difference]: Finished difference Result 21 states and 27 transitions. [2021-10-11 02:31:11,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-11 02:31:11,409 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2021-10-11 02:31:11,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:11,428 INFO L225 Difference]: With dead ends: 21 [2021-10-11 02:31:11,428 INFO L226 Difference]: Without dead ends: 11 [2021-10-11 02:31:11,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 02:31:11,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-10-11 02:31:11,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-10-11 02:31:11,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-11 02:31:11,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-10-11 02:31:11,468 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 7 [2021-10-11 02:31:11,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:11,469 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-10-11 02:31:11,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-10-11 02:31:11,469 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-10-11 02:31:11,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-11 02:31:11,470 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:11,470 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:31:11,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:31:11,471 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:31:11,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:11,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1062469008, now seen corresponding path program 1 times [2021-10-11 02:31:11,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:11,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162230762] [2021-10-11 02:31:11,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:11,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:11,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:31:11,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162230762] [2021-10-11 02:31:11,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:31:11,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-11 02:31:11,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705594154] [2021-10-11 02:31:11,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 02:31:11,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:11,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 02:31:11,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:31:11,727 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 5 states. [2021-10-11 02:31:11,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:11,871 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2021-10-11 02:31:11,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 02:31:11,872 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2021-10-11 02:31:11,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:11,873 INFO L225 Difference]: With dead ends: 25 [2021-10-11 02:31:11,874 INFO L226 Difference]: Without dead ends: 23 [2021-10-11 02:31:11,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-11 02:31:11,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-11 02:31:11,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2021-10-11 02:31:11,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-10-11 02:31:11,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-10-11 02:31:11,892 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2021-10-11 02:31:11,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:11,892 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-10-11 02:31:11,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 02:31:11,893 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-10-11 02:31:11,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-11 02:31:11,893 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:11,893 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:31:11,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:31:11,894 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:31:11,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:11,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1889946821, now seen corresponding path program 1 times [2021-10-11 02:31:11,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:11,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203011980] [2021-10-11 02:31:11,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:11,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:12,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:31:12,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203011980] [2021-10-11 02:31:12,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220195685] [2021-10-11 02:31:12,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df485ec6-0b37-4396-9847-96ab202c1b93/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:31:12,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:12,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-11 02:31:12,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:31:12,310 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-11 02:31:12,313 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:31:12,332 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:31:12,338 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-11 02:31:12,339 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-11 02:31:12,350 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:31:12,354 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-10-11 02:31:12,355 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2021-10-11 02:31:12,452 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2021-10-11 02:31:12,458 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:31:12,468 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:31:12,473 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2021-10-11 02:31:12,478 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-11 02:31:12,484 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:31:12,485 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-10-11 02:31:12,486 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:7 [2021-10-11 02:31:12,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:31:12,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:31:12,555 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 29 [2021-10-11 02:31:12,563 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-10-11 02:31:12,577 INFO L625 ElimStorePlain]: treesize reduction 19, result has 26.9 percent of original size [2021-10-11 02:31:12,578 INFO L515 ElimStorePlain]: Eliminatee |v_#memory_$Pointer$.offset_20| vanished before elimination [2021-10-11 02:31:12,579 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-10-11 02:31:12,579 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-10-11 02:31:12,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:31:12,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1808336114] [2021-10-11 02:31:12,627 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-10-11 02:31:12,627 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:31:12,649 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:31:12,655 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:31:12,656 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:31:12,856 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:31:13,398 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:31:13,594 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-10-11 02:31:13,857 WARN L197 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2021-10-11 02:31:14,093 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-10-11 02:31:14,777 WARN L197 SmtUtils]: Spent 620.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 75 [2021-10-11 02:31:15,279 WARN L197 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 75 [2021-10-11 02:31:15,717 WARN L197 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 71 [2021-10-11 02:31:15,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:31:15,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 5, 5] total 14 [2021-10-11 02:31:15,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113472010] [2021-10-11 02:31:15,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-10-11 02:31:15,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:15,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-11 02:31:15,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-10-11 02:31:15,722 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 8 states. [2021-10-11 02:31:15,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:15,807 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2021-10-11 02:31:15,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-11 02:31:15,808 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2021-10-11 02:31:15,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:15,809 INFO L225 Difference]: With dead ends: 22 [2021-10-11 02:31:15,809 INFO L226 Difference]: Without dead ends: 14 [2021-10-11 02:31:15,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-10-11 02:31:15,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-10-11 02:31:15,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2021-10-11 02:31:15,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-10-11 02:31:15,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-10-11 02:31:15,813 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2021-10-11 02:31:15,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:15,814 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-10-11 02:31:15,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-10-11 02:31:15,814 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-10-11 02:31:15,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-11 02:31:15,815 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:15,815 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:31:16,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-10-11 02:31:16,026 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:31:16,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:16,027 INFO L82 PathProgramCache]: Analyzing trace with hash -842532537, now seen corresponding path program 1 times [2021-10-11 02:31:16,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:16,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89192315] [2021-10-11 02:31:16,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:16,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:31:16,047 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:31:16,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:31:16,070 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:31:16,091 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-11 02:31:16,091 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:31:16,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-11 02:31:16,121 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:31:16 BoogieIcfgContainer [2021-10-11 02:31:16,121 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:31:16,122 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:31:16,122 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:31:16,122 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:31:16,123 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:31:10" (3/4) ... [2021-10-11 02:31:16,125 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-11 02:31:16,170 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df485ec6-0b37-4396-9847-96ab202c1b93/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:31:16,170 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:31:16,171 INFO L168 Benchmark]: Toolchain (without parser) took 6755.93 ms. Allocated memory was 121.6 MB in the beginning and 182.5 MB in the end (delta: 60.8 MB). Free memory was 86.0 MB in the beginning and 99.0 MB in the end (delta: -13.0 MB). Peak memory consumption was 46.2 MB. Max. memory is 16.1 GB. [2021-10-11 02:31:16,172 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 81.8 MB. Free memory was 36.3 MB in the beginning and 36.2 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:31:16,172 INFO L168 Benchmark]: CACSL2BoogieTranslator took 724.59 ms. Allocated memory is still 121.6 MB. Free memory was 86.0 MB in the beginning and 83.7 MB in the end (delta: 2.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:31:16,173 INFO L168 Benchmark]: Boogie Procedure Inliner took 74.23 ms. Allocated memory is still 121.6 MB. Free memory was 83.7 MB in the beginning and 82.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:31:16,174 INFO L168 Benchmark]: Boogie Preprocessor took 77.04 ms. Allocated memory is still 121.6 MB. Free memory was 82.2 MB in the beginning and 81.0 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:31:16,174 INFO L168 Benchmark]: RCFGBuilder took 693.18 ms. Allocated memory is still 121.6 MB. Free memory was 81.0 MB in the beginning and 59.8 MB in the end (delta: 21.1 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-10-11 02:31:16,175 INFO L168 Benchmark]: TraceAbstraction took 5128.11 ms. Allocated memory was 121.6 MB in the beginning and 182.5 MB in the end (delta: 60.8 MB). Free memory was 59.2 MB in the beginning and 101.1 MB in the end (delta: -41.9 MB). Peak memory consumption was 19.6 MB. Max. memory is 16.1 GB. [2021-10-11 02:31:16,175 INFO L168 Benchmark]: Witness Printer took 48.31 ms. Allocated memory is still 182.5 MB. Free memory was 101.1 MB in the beginning and 99.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:31:16,178 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 81.8 MB. Free memory was 36.3 MB in the beginning and 36.2 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 724.59 ms. Allocated memory is still 121.6 MB. Free memory was 86.0 MB in the beginning and 83.7 MB in the end (delta: 2.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 74.23 ms. Allocated memory is still 121.6 MB. Free memory was 83.7 MB in the beginning and 82.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 77.04 ms. Allocated memory is still 121.6 MB. Free memory was 82.2 MB in the beginning and 81.0 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 693.18 ms. Allocated memory is still 121.6 MB. Free memory was 81.0 MB in the beginning and 59.8 MB in the end (delta: 21.1 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5128.11 ms. Allocated memory was 121.6 MB in the beginning and 182.5 MB in the end (delta: 60.8 MB). Free memory was 59.2 MB in the beginning and 101.1 MB in the end (delta: -41.9 MB). Peak memory consumption was 19.6 MB. Max. memory is 16.1 GB. * Witness Printer took 48.31 ms. Allocated memory is still 182.5 MB. Free memory was 101.1 MB in the beginning and 99.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 549]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L532] List a = (List) malloc(sizeof(struct node)); [L533] COND FALSE !(a == 0) [L534] List t; [L535] List p = a; [L536] a->h = 2 [L537] COND TRUE __VERIFIER_nondet_int() [L538] p->h = 1 [L539] t = (List) malloc(sizeof(struct node)) [L540] COND FALSE !(t == 0) [L541] p->n = t [L542] EXPR p->n [L542] p = p->n [L537] COND FALSE !(__VERIFIER_nondet_int()) [L544] p->h = 2 [L545] p->n = 0 [L546] p = a [L547] COND TRUE p!=0 [L548] EXPR p->h [L548] COND TRUE p->h != 2 [L549] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.0s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 29 SDtfs, 16 SDslu, 25 SDs, 0 SdLazy, 54 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 8 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 48 NumberOfCodeBlocks, 48 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 43 ConstructedInterpolants, 0 QuantifiedInterpolants, 3307 SizeOfPredicates, 6 NumberOfNonLiveVariables, 70 ConjunctsInSsa, 21 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 3/6 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME[ms]: 772, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 8, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 14, TOOLS_POST_TIME[ms]: 582, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME[ms]: 0, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME[ms]: 0, TOOLS_QUANTIFIERELIM_APPLICATIONS: 14, TOOLS_QUANTIFIERELIM_TIME[ms]: 575, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 234, FLUID_QUERY_TIME[ms]: 3, FLUID_QUERIES: 28, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 0, DOMAIN_JOIN_TIME[ms]: 0, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 1, DOMAIN_WIDEN_TIME[ms]: 97, DOMAIN_ISSUBSETEQ_APPLICATIONS: 2, DOMAIN_ISSUBSETEQ_TIME[ms]: 7, DOMAIN_ISBOTTOM_APPLICATIONS: 8, DOMAIN_ISBOTTOM_TIME[ms]: 20, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 149, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 149, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 2, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 2, PATH_EXPR_TIME[ms]: 3, REGEX_TO_DAG_TIME[ms]: 3, DAG_COMPRESSION_TIME[ms]: 8, DAG_COMPRESSION_PROCESSED_NODES: 68, DAG_COMPRESSION_RETAINED_NODES: 28, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...