./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 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_c6a107b4-a771-4c47-b104-1140c2224017/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_c6a107b4-a771-4c47-b104-1140c2224017/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_c6a107b4-a771-4c47-b104-1140c2224017/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_c6a107b4-a771-4c47-b104-1140c2224017/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/brs3f.c -s /tmp/vcloud-vcloud-master/worker/run_dir_c6a107b4-a771-4c47-b104-1140c2224017/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_c6a107b4-a771-4c47-b104-1140c2224017/bin/utaipan --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 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 0.2.0-7b2dab5 [2020-12-09 05:01:54,986 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 05:01:54,988 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 05:01:55,040 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 05:01:55,040 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 05:01:55,042 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 05:01:55,043 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 05:01:55,045 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 05:01:55,047 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 05:01:55,048 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 05:01:55,048 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 05:01:55,049 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 05:01:55,050 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 05:01:55,051 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 05:01:55,052 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 05:01:55,053 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 05:01:55,053 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 05:01:55,054 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 05:01:55,056 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 05:01:55,057 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 05:01:55,059 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 05:01:55,060 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 05:01:55,061 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 05:01:55,062 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 05:01:55,064 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 05:01:55,065 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 05:01:55,065 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 05:01:55,066 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 05:01:55,066 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 05:01:55,067 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 05:01:55,068 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 05:01:55,068 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 05:01:55,069 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 05:01:55,069 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 05:01:55,070 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 05:01:55,070 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 05:01:55,071 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 05:01:55,071 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 05:01:55,071 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 05:01:55,072 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 05:01:55,072 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 05:01:55,073 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_c6a107b4-a771-4c47-b104-1140c2224017/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 05:01:55,091 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 05:01:55,092 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 05:01:55,092 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 05:01:55,092 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 05:01:55,092 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 05:01:55,093 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 05:01:55,093 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 05:01:55,093 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 05:01:55,093 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 05:01:55,093 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 05:01:55,093 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 05:01:55,093 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 05:01:55,093 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 05:01:55,094 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 05:01:55,094 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 05:01:55,094 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 05:01:55,094 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 05:01:55,094 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 05:01:55,094 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 05:01:55,094 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 05:01:55,095 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 05:01:55,095 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 05:01:55,095 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 05:01:55,095 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 05:01:55,095 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 05:01:55,095 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 05:01:55,095 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 05:01:55,095 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 05:01:55,096 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 05:01:55,096 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 05:01:55,096 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 05:01:55,096 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 05:01:55,096 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 05:01:55,096 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 05:01:55,096 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 05:01:55,096 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 05:01:55,096 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 05:01:55,097 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 05:01:55,097 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 05:01:55,097 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-vcloud-master/worker/run_dir_c6a107b4-a771-4c47-b104-1140c2224017/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_c6a107b4-a771-4c47-b104-1140c2224017/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5a6b49f9c2a6d2eda01ab26465c2ce5a73ff1827 [2020-12-09 05:01:55,288 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 05:01:55,303 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 05:01:55,305 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 05:01:55,306 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 05:01:55,307 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 05:01:55,307 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_c6a107b4-a771-4c47-b104-1140c2224017/bin/utaipan/../../sv-benchmarks/c/array-fpi/brs3f.c [2020-12-09 05:01:55,348 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c6a107b4-a771-4c47-b104-1140c2224017/bin/utaipan/data/bc723e6f1/1012eada323a41fc98bbe337cc4ff51b/FLAG2172ef519 [2020-12-09 05:01:55,706 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 05:01:55,706 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_c6a107b4-a771-4c47-b104-1140c2224017/sv-benchmarks/c/array-fpi/brs3f.c [2020-12-09 05:01:55,712 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c6a107b4-a771-4c47-b104-1140c2224017/bin/utaipan/data/bc723e6f1/1012eada323a41fc98bbe337cc4ff51b/FLAG2172ef519 [2020-12-09 05:01:55,723 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_c6a107b4-a771-4c47-b104-1140c2224017/bin/utaipan/data/bc723e6f1/1012eada323a41fc98bbe337cc4ff51b [2020-12-09 05:01:55,725 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 05:01:55,726 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 05:01:55,728 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 05:01:55,728 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 05:01:55,730 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 05:01:55,731 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:01:55" (1/1) ... [2020-12-09 05:01:55,732 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7607ae09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:01:55, skipping insertion in model container [2020-12-09 05:01:55,732 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:01:55" (1/1) ... [2020-12-09 05:01:55,738 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 05:01:55,749 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 05:01:55,867 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_c6a107b4-a771-4c47-b104-1140c2224017/sv-benchmarks/c/array-fpi/brs3f.c[588,601] [2020-12-09 05:01:55,880 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 05:01:55,886 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 05:01:55,894 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_c6a107b4-a771-4c47-b104-1140c2224017/sv-benchmarks/c/array-fpi/brs3f.c[588,601] [2020-12-09 05:01:55,900 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 05:01:55,911 INFO L208 MainTranslator]: Completed translation [2020-12-09 05:01:55,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:01:55 WrapperNode [2020-12-09 05:01:55,911 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 05:01:55,912 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 05:01:55,912 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 05:01:55,913 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 05:01:55,918 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:01:55" (1/1) ... [2020-12-09 05:01:55,923 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:01:55" (1/1) ... [2020-12-09 05:01:55,937 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 05:01:55,937 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 05:01:55,937 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 05:01:55,937 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 05:01:55,943 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:01:55" (1/1) ... [2020-12-09 05:01:55,943 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:01:55" (1/1) ... [2020-12-09 05:01:55,945 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:01:55" (1/1) ... [2020-12-09 05:01:55,945 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:01:55" (1/1) ... [2020-12-09 05:01:55,949 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:01:55" (1/1) ... [2020-12-09 05:01:55,953 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:01:55" (1/1) ... [2020-12-09 05:01:55,954 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:01:55" (1/1) ... [2020-12-09 05:01:55,955 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 05:01:55,956 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 05:01:55,956 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 05:01:55,956 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 05:01:55,957 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:01:55" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6a107b4-a771-4c47-b104-1140c2224017/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 05:01:56,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 05:01:56,026 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 05:01:56,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 05:01:56,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 05:01:56,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 05:01:56,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 05:01:56,027 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 05:01:56,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 05:01:56,308 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 05:01:56,308 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-09 05:01:56,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:01:56 BoogieIcfgContainer [2020-12-09 05:01:56,310 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 05:01:56,312 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 05:01:56,312 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 05:01:56,315 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 05:01:56,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 05:01:55" (1/3) ... [2020-12-09 05:01:56,316 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a5c183b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:01:56, skipping insertion in model container [2020-12-09 05:01:56,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:01:55" (2/3) ... [2020-12-09 05:01:56,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a5c183b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:01:56, skipping insertion in model container [2020-12-09 05:01:56,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:01:56" (3/3) ... [2020-12-09 05:01:56,318 INFO L111 eAbstractionObserver]: Analyzing ICFG brs3f.c [2020-12-09 05:01:56,328 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 05:01:56,331 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 05:01:56,340 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 05:01:56,358 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 05:01:56,358 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 05:01:56,358 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 05:01:56,358 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 05:01:56,358 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 05:01:56,358 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 05:01:56,359 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 05:01:56,359 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 05:01:56,369 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2020-12-09 05:01:56,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 05:01:56,373 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:01:56,373 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 05:01:56,374 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 05:01:56,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:01:56,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1441693108, now seen corresponding path program 1 times [2020-12-09 05:01:56,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:01:56,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114886141] [2020-12-09 05:01:56,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:01:56,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:01:56,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:01:56,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114886141] [2020-12-09 05:01:56,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:01:56,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 05:01:56,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840551538] [2020-12-09 05:01:56,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 05:01:56,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:01:56,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 05:01:56,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 05:01:56,544 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2020-12-09 05:01:56,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:01:56,587 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2020-12-09 05:01:56,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 05:01:56,589 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-09 05:01:56,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:01:56,595 INFO L225 Difference]: With dead ends: 18 [2020-12-09 05:01:56,595 INFO L226 Difference]: Without dead ends: 8 [2020-12-09 05:01:56,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 05:01:56,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-12-09 05:01:56,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-12-09 05:01:56,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-12-09 05:01:56,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2020-12-09 05:01:56,618 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2020-12-09 05:01:56,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:01:56,618 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2020-12-09 05:01:56,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 05:01:56,618 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2020-12-09 05:01:56,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 05:01:56,618 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:01:56,618 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:01:56,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 05:01:56,619 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 05:01:56,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:01:56,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1744495143, now seen corresponding path program 1 times [2020-12-09 05:01:56,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:01:56,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210555381] [2020-12-09 05:01:56,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:01:56,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:01:56,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 05:01:56,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210555381] [2020-12-09 05:01:56,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:01:56,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 05:01:56,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710073460] [2020-12-09 05:01:56,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 05:01:56,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:01:56,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 05:01:56,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 05:01:56,671 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 4 states. [2020-12-09 05:01:56,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:01:56,691 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2020-12-09 05:01:56,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 05:01:56,691 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-09 05:01:56,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:01:56,692 INFO L225 Difference]: With dead ends: 12 [2020-12-09 05:01:56,692 INFO L226 Difference]: Without dead ends: 9 [2020-12-09 05:01:56,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 05:01:56,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-12-09 05:01:56,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-12-09 05:01:56,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-12-09 05:01:56,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2020-12-09 05:01:56,695 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 7 [2020-12-09 05:01:56,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:01:56,696 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2020-12-09 05:01:56,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 05:01:56,696 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2020-12-09 05:01:56,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 05:01:56,696 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:01:56,696 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:01:56,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 05:01:56,697 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 05:01:56,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:01:56,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1755182165, now seen corresponding path program 1 times [2020-12-09 05:01:56,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:01:56,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955355262] [2020-12-09 05:01:56,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:01:56,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:01:56,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 05:01:56,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955355262] [2020-12-09 05:01:56,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787356702] [2020-12-09 05:01:56,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6a107b4-a771-4c47-b104-1140c2224017/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 05:01:56,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:01:56,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-09 05:01:56,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 05:01:56,900 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 [2020-12-09 05:01:56,901 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 05:01:56,905 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 05:01:56,906 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 05:01:56,906 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2020-12-09 05:01:56,945 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 05:01:56,951 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 05:01:56,959 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 05:01:56,963 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 05:01:56,966 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 05:01:56,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:01:56,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 05:01:57,007 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 05:01:57,027 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 05:01:57,027 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2020-12-09 05:01:57,030 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-12-09 05:01:57,034 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 05:01:57,042 INFO L625 ElimStorePlain]: treesize reduction 5, result has 64.3 percent of original size [2020-12-09 05:01:57,043 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-12-09 05:01:57,043 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:34, output treesize:9 [2020-12-09 05:01:57,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:01:57,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [100867056] [2020-12-09 05:01:57,115 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 05:01:57,116 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 05:01:57,120 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 05:01:57,125 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 05:01:57,125 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 05:01:57,228 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 05:01:57,380 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 05:01:57,578 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 05:01:57,617 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 05:01:57,891 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 05:01:57,990 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 05:01:58,153 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 55 [2020-12-09 05:01:58,412 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2020-12-09 05:01:58,555 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2020-12-09 05:01:58,557 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 05:01:58,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 05:01:58,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2020-12-09 05:01:58,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010207039] [2020-12-09 05:01:58,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-09 05:01:58,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:01:58,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-09 05:01:58,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2020-12-09 05:01:58,559 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 15 states. [2020-12-09 05:01:58,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:01:58,664 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2020-12-09 05:01:58,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-09 05:01:58,664 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 8 [2020-12-09 05:01:58,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:01:58,665 INFO L225 Difference]: With dead ends: 21 [2020-12-09 05:01:58,665 INFO L226 Difference]: Without dead ends: 17 [2020-12-09 05:01:58,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-12-09 05:01:58,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-09 05:01:58,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 10. [2020-12-09 05:01:58,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-09 05:01:58,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2020-12-09 05:01:58,668 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2020-12-09 05:01:58,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:01:58,668 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-12-09 05:01:58,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-09 05:01:58,668 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2020-12-09 05:01:58,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 05:01:58,668 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:01:58,668 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:01:58,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-09 05:01:58,870 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 05:01:58,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:01:58,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1423970983, now seen corresponding path program 2 times [2020-12-09 05:01:58,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:01:58,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16710563] [2020-12-09 05:01:58,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:01:58,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:01:58,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:01:58,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16710563] [2020-12-09 05:01:58,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923157874] [2020-12-09 05:01:58,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6a107b4-a771-4c47-b104-1140c2224017/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 05:01:58,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-09 05:01:58,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 05:01:58,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 05:01:58,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 05:01:59,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:01:59,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 05:01:59,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:01:59,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [206295069] [2020-12-09 05:01:59,035 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 05:01:59,035 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 05:01:59,035 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 05:01:59,035 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 05:01:59,036 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 05:01:59,125 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 05:01:59,218 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 05:01:59,227 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 05:01:59,238 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 05:01:59,249 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 05:01:59,259 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 05:01:59,270 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 05:01:59,278 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 05:01:59,417 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 05:01:59,505 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 05:01:59,631 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 55 [2020-12-09 05:01:59,935 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2020-12-09 05:01:59,935 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 05:01:59,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 05:01:59,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2020-12-09 05:01:59,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164032567] [2020-12-09 05:01:59,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-09 05:01:59,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:01:59,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-09 05:01:59,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-12-09 05:01:59,937 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 10 states. [2020-12-09 05:01:59,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:01:59,971 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2020-12-09 05:01:59,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 05:01:59,971 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-12-09 05:01:59,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:01:59,971 INFO L225 Difference]: With dead ends: 17 [2020-12-09 05:01:59,972 INFO L226 Difference]: Without dead ends: 11 [2020-12-09 05:01:59,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-12-09 05:01:59,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-12-09 05:01:59,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-12-09 05:01:59,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-09 05:01:59,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2020-12-09 05:01:59,974 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 9 [2020-12-09 05:01:59,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:01:59,974 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-12-09 05:01:59,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-09 05:01:59,974 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2020-12-09 05:01:59,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 05:01:59,974 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:01:59,974 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-12-09 05:02:00,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-09 05:02:00,176 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 05:02:00,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:02:00,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1526893228, now seen corresponding path program 3 times [2020-12-09 05:02:00,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:02:00,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117393136] [2020-12-09 05:02:00,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:02:00,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 05:02:00,251 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 05:02:00,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 05:02:00,299 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 05:02:00,317 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 05:02:00,317 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 05:02:00,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-12-09 05:02:00,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 05:02:00 BoogieIcfgContainer [2020-12-09 05:02:00,343 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 05:02:00,343 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 05:02:00,343 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 05:02:00,343 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 05:02:00,344 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:01:56" (3/4) ... [2020-12-09 05:02:00,345 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 05:02:00,374 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_c6a107b4-a771-4c47-b104-1140c2224017/bin/utaipan/witness.graphml [2020-12-09 05:02:00,374 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 05:02:00,375 INFO L168 Benchmark]: Toolchain (without parser) took 4648.17 ms. Allocated memory was 111.1 MB in the beginning and 169.9 MB in the end (delta: 58.7 MB). Free memory was 74.3 MB in the beginning and 68.1 MB in the end (delta: 6.1 MB). Peak memory consumption was 64.7 MB. Max. memory is 16.1 GB. [2020-12-09 05:02:00,376 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 111.1 MB. Free memory was 90.6 MB in the beginning and 90.5 MB in the end (delta: 83.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 05:02:00,376 INFO L168 Benchmark]: CACSL2BoogieTranslator took 183.91 ms. Allocated memory is still 111.1 MB. Free memory was 74.1 MB in the beginning and 87.7 MB in the end (delta: -13.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-09 05:02:00,376 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.50 ms. Allocated memory is still 111.1 MB. Free memory was 87.2 MB in the beginning and 86.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 05:02:00,377 INFO L168 Benchmark]: Boogie Preprocessor took 18.22 ms. Allocated memory is still 111.1 MB. Free memory was 86.0 MB in the beginning and 84.8 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 05:02:00,377 INFO L168 Benchmark]: RCFGBuilder took 354.21 ms. Allocated memory is still 111.1 MB. Free memory was 84.8 MB in the beginning and 60.4 MB in the end (delta: 24.4 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2020-12-09 05:02:00,378 INFO L168 Benchmark]: TraceAbstraction took 4030.74 ms. Allocated memory was 111.1 MB in the beginning and 169.9 MB in the end (delta: 58.7 MB). Free memory was 60.0 MB in the beginning and 70.2 MB in the end (delta: -10.2 MB). Peak memory consumption was 50.2 MB. Max. memory is 16.1 GB. [2020-12-09 05:02:00,378 INFO L168 Benchmark]: Witness Printer took 31.07 ms. Allocated memory is still 169.9 MB. Free memory was 70.2 MB in the beginning and 68.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 05:02:00,381 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 111.1 MB. Free memory was 90.6 MB in the beginning and 90.5 MB in the end (delta: 83.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 183.91 ms. Allocated memory is still 111.1 MB. Free memory was 74.1 MB in the beginning and 87.7 MB in the end (delta: -13.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 24.50 ms. Allocated memory is still 111.1 MB. Free memory was 87.2 MB in the beginning and 86.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 18.22 ms. Allocated memory is still 111.1 MB. Free memory was 86.0 MB in the beginning and 84.8 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 354.21 ms. Allocated memory is still 111.1 MB. Free memory was 84.8 MB in the beginning and 60.4 MB in the end (delta: 24.4 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4030.74 ms. Allocated memory was 111.1 MB in the beginning and 169.9 MB in the end (delta: 58.7 MB). Free memory was 60.0 MB in the beginning and 70.2 MB in the end (delta: -10.2 MB). Peak memory consumption was 50.2 MB. Max. memory is 16.1 GB. * Witness Printer took 31.07 ms. Allocated memory is still 169.9 MB. Free memory was 70.2 MB in the beginning and 68.1 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: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) [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