./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/test_while_int.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1a2609d-5b79-47a2-8e81-7ca4bb81106c/bin/utaipan-tZwUujhuQw/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1a2609d-5b79-47a2-8e81-7ca4bb81106c/bin/utaipan-tZwUujhuQw/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1a2609d-5b79-47a2-8e81-7ca4bb81106c/bin/utaipan-tZwUujhuQw/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1a2609d-5b79-47a2-8e81-7ca4bb81106c/bin/utaipan-tZwUujhuQw/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-regression/test_while_int.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1a2609d-5b79-47a2-8e81-7ca4bb81106c/bin/utaipan-tZwUujhuQw/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1a2609d-5b79-47a2-8e81-7ca4bb81106c/bin/utaipan-tZwUujhuQw --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 f3aef2cb0383bc51116609eb7d5762e5307f0f48dd90c41df34c9f2444e8da09 ............................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-20 05:54:45,530 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-20 05:54:45,534 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-20 05:54:45,598 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-20 05:54:45,599 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-20 05:54:45,600 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-20 05:54:45,602 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-20 05:54:45,605 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-20 05:54:45,607 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-20 05:54:45,608 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-20 05:54:45,609 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-20 05:54:45,611 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-20 05:54:45,611 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-20 05:54:45,617 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-20 05:54:45,619 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-20 05:54:45,622 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-20 05:54:45,642 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-20 05:54:45,644 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-20 05:54:45,646 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-20 05:54:45,649 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-20 05:54:45,652 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-20 05:54:45,654 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-20 05:54:45,656 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-20 05:54:45,657 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-20 05:54:45,661 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-20 05:54:45,662 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-20 05:54:45,663 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-20 05:54:45,664 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-20 05:54:45,665 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-20 05:54:45,667 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-20 05:54:45,667 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-20 05:54:45,669 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-20 05:54:45,670 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-20 05:54:45,689 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-20 05:54:45,691 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-20 05:54:45,691 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-20 05:54:45,693 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-20 05:54:45,693 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-20 05:54:45,694 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-20 05:54:45,695 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-20 05:54:45,696 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-20 05:54:45,697 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1a2609d-5b79-47a2-8e81-7ca4bb81106c/bin/utaipan-tZwUujhuQw/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-20 05:54:45,725 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-20 05:54:45,726 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-20 05:54:45,727 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-20 05:54:45,727 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-20 05:54:45,728 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-20 05:54:45,728 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-20 05:54:45,728 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-20 05:54:45,729 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-20 05:54:45,729 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-20 05:54:45,729 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-20 05:54:45,730 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-20 05:54:45,730 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-20 05:54:45,730 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-20 05:54:45,731 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-20 05:54:45,731 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-20 05:54:45,732 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-20 05:54:45,732 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-20 05:54:45,733 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-20 05:54:45,733 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-20 05:54:45,733 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-20 05:54:45,734 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-20 05:54:45,734 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-20 05:54:45,734 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-20 05:54:45,735 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-20 05:54:45,735 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-20 05:54:45,735 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-20 05:54:45,736 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-20 05:54:45,736 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-20 05:54:45,736 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-20 05:54:45,737 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-20 05:54:45,737 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-20 05:54:45,738 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-20 05:54:45,738 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-20 05:54:45,738 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-20 05:54:45,739 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-20 05:54:45,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-20 05:54:45,739 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-20 05:54:45,740 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-20 05:54:45,740 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-20 05:54:45,740 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_d1a2609d-5b79-47a2-8e81-7ca4bb81106c/bin/utaipan-tZwUujhuQw/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1a2609d-5b79-47a2-8e81-7ca4bb81106c/bin/utaipan-tZwUujhuQw Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f3aef2cb0383bc51116609eb7d5762e5307f0f48dd90c41df34c9f2444e8da09 [2021-10-20 05:54:46,022 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-20 05:54:46,048 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-20 05:54:46,052 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-20 05:54:46,053 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-20 05:54:46,054 INFO L275 PluginConnector]: CDTParser initialized [2021-10-20 05:54:46,055 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1a2609d-5b79-47a2-8e81-7ca4bb81106c/bin/utaipan-tZwUujhuQw/../../sv-benchmarks/c/ldv-regression/test_while_int.i [2021-10-20 05:54:46,126 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1a2609d-5b79-47a2-8e81-7ca4bb81106c/bin/utaipan-tZwUujhuQw/data/8ba101a9b/2ccdc7909ae24743a9e97fb273929a95/FLAGa8bb8dce0 [2021-10-20 05:54:46,719 INFO L306 CDTParser]: Found 1 translation units. [2021-10-20 05:54:46,720 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1a2609d-5b79-47a2-8e81-7ca4bb81106c/sv-benchmarks/c/ldv-regression/test_while_int.i [2021-10-20 05:54:46,732 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1a2609d-5b79-47a2-8e81-7ca4bb81106c/bin/utaipan-tZwUujhuQw/data/8ba101a9b/2ccdc7909ae24743a9e97fb273929a95/FLAGa8bb8dce0 [2021-10-20 05:54:47,061 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1a2609d-5b79-47a2-8e81-7ca4bb81106c/bin/utaipan-tZwUujhuQw/data/8ba101a9b/2ccdc7909ae24743a9e97fb273929a95 [2021-10-20 05:54:47,064 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-20 05:54:47,066 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-20 05:54:47,071 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-20 05:54:47,072 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-20 05:54:47,076 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-20 05:54:47,078 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 05:54:47" (1/1) ... [2021-10-20 05:54:47,081 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41849454 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:54:47, skipping insertion in model container [2021-10-20 05:54:47,081 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 05:54:47" (1/1) ... [2021-10-20 05:54:47,090 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-20 05:54:47,106 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-20 05:54:47,255 WARN L228 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_d1a2609d-5b79-47a2-8e81-7ca4bb81106c/sv-benchmarks/c/ldv-regression/test_while_int.i[296,309] [2021-10-20 05:54:47,274 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-20 05:54:47,285 INFO L203 MainTranslator]: Completed pre-run [2021-10-20 05:54:47,300 WARN L228 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_d1a2609d-5b79-47a2-8e81-7ca4bb81106c/sv-benchmarks/c/ldv-regression/test_while_int.i[296,309] [2021-10-20 05:54:47,303 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-20 05:54:47,320 INFO L208 MainTranslator]: Completed translation [2021-10-20 05:54:47,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:54:47 WrapperNode [2021-10-20 05:54:47,321 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-20 05:54:47,322 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-20 05:54:47,323 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-20 05:54:47,323 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-20 05:54:47,332 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:54:47" (1/1) ... [2021-10-20 05:54:47,340 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:54:47" (1/1) ... [2021-10-20 05:54:47,360 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-20 05:54:47,361 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-20 05:54:47,361 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-20 05:54:47,362 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-20 05:54:47,372 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:54:47" (1/1) ... [2021-10-20 05:54:47,372 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:54:47" (1/1) ... [2021-10-20 05:54:47,374 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:54:47" (1/1) ... [2021-10-20 05:54:47,374 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:54:47" (1/1) ... [2021-10-20 05:54:47,378 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:54:47" (1/1) ... [2021-10-20 05:54:47,383 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:54:47" (1/1) ... [2021-10-20 05:54:47,384 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:54:47" (1/1) ... [2021-10-20 05:54:47,386 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-20 05:54:47,387 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-20 05:54:47,387 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-20 05:54:47,388 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-20 05:54:47,389 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:54:47" (1/1) ... [2021-10-20 05:54:47,398 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-20 05:54:47,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1a2609d-5b79-47a2-8e81-7ca4bb81106c/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 05:54:47,431 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1a2609d-5b79-47a2-8e81-7ca4bb81106c/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-20 05:54:47,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1a2609d-5b79-47a2-8e81-7ca4bb81106c/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-20 05:54:47,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-20 05:54:47,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-20 05:54:47,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-20 05:54:47,488 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-20 05:54:47,816 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-20 05:54:47,816 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-10-20 05:54:47,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:54:47 BoogieIcfgContainer [2021-10-20 05:54:47,819 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-20 05:54:47,823 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-20 05:54:47,823 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-20 05:54:47,830 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-20 05:54:47,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 05:54:47" (1/3) ... [2021-10-20 05:54:47,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@593e587d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 05:54:47, skipping insertion in model container [2021-10-20 05:54:47,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:54:47" (2/3) ... [2021-10-20 05:54:47,832 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@593e587d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 05:54:47, skipping insertion in model container [2021-10-20 05:54:47,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:54:47" (3/3) ... [2021-10-20 05:54:47,834 INFO L111 eAbstractionObserver]: Analyzing ICFG test_while_int.i [2021-10-20 05:54:47,847 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-20 05:54:47,848 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-20 05:54:47,925 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-20 05:54:47,935 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-20 05:54:47,936 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-20 05:54:47,952 INFO L276 IsEmpty]: Start isEmpty. Operand has 6 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:54:47,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-20 05:54:47,957 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:54:47,958 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-20 05:54:47,959 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:54:47,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:54:47,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1828336, now seen corresponding path program 1 times [2021-10-20 05:54:47,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:54:47,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015777312] [2021-10-20 05:54:47,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:54:47,993 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:54:48,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:54:48,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:54:48,325 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:54:48,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015777312] [2021-10-20 05:54:48,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015777312] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:54:48,327 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:54:48,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-20 05:54:48,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170461229] [2021-10-20 05:54:48,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-20 05:54:48,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:54:48,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-20 05:54:48,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-20 05:54:48,368 INFO L87 Difference]: Start difference. First operand has 6 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:54:48,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:54:48,432 INFO L93 Difference]: Finished difference Result 13 states and 17 transitions. [2021-10-20 05:54:48,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-20 05:54:48,434 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-20 05:54:48,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:54:48,455 INFO L225 Difference]: With dead ends: 13 [2021-10-20 05:54:48,456 INFO L226 Difference]: Without dead ends: 7 [2021-10-20 05:54:48,458 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-20 05:54:48,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-10-20 05:54:48,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-10-20 05:54:48,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:54:48,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2021-10-20 05:54:48,501 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2021-10-20 05:54:48,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:54:48,501 INFO L470 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2021-10-20 05:54:48,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:54:48,502 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2021-10-20 05:54:48,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-20 05:54:48,503 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:54:48,503 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2021-10-20 05:54:48,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-20 05:54:48,504 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:54:48,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:54:48,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1756965101, now seen corresponding path program 1 times [2021-10-20 05:54:48,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:54:48,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044635817] [2021-10-20 05:54:48,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:54:48,506 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:54:48,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:54:48,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:54:48,601 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:54:48,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044635817] [2021-10-20 05:54:48,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044635817] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-20 05:54:48,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455469158] [2021-10-20 05:54:48,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:54:48,603 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-20 05:54:48,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1a2609d-5b79-47a2-8e81-7ca4bb81106c/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 05:54:48,614 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1a2609d-5b79-47a2-8e81-7ca4bb81106c/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-20 05:54:48,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1a2609d-5b79-47a2-8e81-7ca4bb81106c/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-20 05:54:48,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:54:48,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-20 05:54:48,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 05:54:48,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:54:48,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 05:54:48,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:54:48,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455469158] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-20 05:54:48,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1675219872] [2021-10-20 05:54:48,892 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-10-20 05:54:48,893 INFO L166 IcfgInterpreter]: Building call graph [2021-10-20 05:54:48,903 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-20 05:54:48,914 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-20 05:54:48,915 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-20 05:54:48,954 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 05:54:48,963 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 05:54:48,964 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 05:54:48,965 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-20 05:54:48,967 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 05:54:48,968 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 05:54:48,968 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-20 05:54:48,973 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-10-20 05:54:49,000 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_9|], 21=[|v_#valid_10|]} [2021-10-20 05:54:49,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 05:54:49,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 05:54:49,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 05:54:49,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-10-20 05:54:49,035 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 05:54:49,036 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-20 05:54:49,039 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 05:54:49,040 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-20 05:54:49,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-20 05:54:49,045 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 05:54:49,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 05:54:49,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 05:54:49,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 05:54:49,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 05:54:49,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 05:54:49,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 05:54:49,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 05:54:49,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 05:54:49,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 05:54:49,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 05:54:49,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-10-20 05:54:49,160 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 05:54:49,163 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-20 05:54:49,165 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 05:54:49,166 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-20 05:54:49,166 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-20 05:54:49,167 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 05:54:49,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 05:54:49,192 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 05:54:49,195 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94 [2021-10-20 05:54:49,196 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-20 05:54:49,205 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:119, output treesize:94 [2021-10-20 05:54:49,228 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.5 percent of original size [2021-10-20 05:54:49,240 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 113 [2021-10-20 05:54:49,266 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.9 percent of original size [2021-10-20 05:54:49,295 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 113 [2021-10-20 05:54:49,300 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 05:54:49,392 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 05:54:49,398 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 05:54:49,402 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 05:54:49,408 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 05:54:49,412 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 05:54:49,440 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 05:54:49,489 INFO L180 QuantifierPusher]: treesize reduction 34, result has 67.6 percent of original size [2021-10-20 05:54:49,504 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 53 [2021-10-20 05:54:49,509 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 05:54:49,524 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 05:54:49,529 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 05:54:49,532 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 05:54:49,539 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 05:54:49,552 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 05:54:49,574 INFO L180 QuantifierPusher]: treesize reduction 30, result has 69.7 percent of original size [2021-10-20 05:54:49,583 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 53 [2021-10-20 05:54:49,598 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 05:54:49,613 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 05:54:49,643 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 05:54:49,655 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 05:54:49,694 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-20 05:54:50,346 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-20 05:54:50,346 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-20 05:54:50,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-10-20 05:54:50,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386372294] [2021-10-20 05:54:50,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-20 05:54:50,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:54:50,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-20 05:54:50,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-20 05:54:50,352 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:54:50,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:54:50,442 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2021-10-20 05:54:50,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-20 05:54:50,443 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-20 05:54:50,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:54:50,444 INFO L225 Difference]: With dead ends: 18 [2021-10-20 05:54:50,444 INFO L226 Difference]: Without dead ends: 16 [2021-10-20 05:54:50,448 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 754.0ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-10-20 05:54:50,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-20 05:54:50,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 13. [2021-10-20 05:54:50,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:54:50,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-10-20 05:54:50,456 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 6 [2021-10-20 05:54:50,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:54:50,456 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-10-20 05:54:50,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:54:50,459 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-10-20 05:54:50,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-20 05:54:50,460 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:54:50,460 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2021-10-20 05:54:50,498 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1a2609d-5b79-47a2-8e81-7ca4bb81106c/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-20 05:54:50,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1a2609d-5b79-47a2-8e81-7ca4bb81106c/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-20 05:54:50,675 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:54:50,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:54:50,675 INFO L82 PathProgramCache]: Analyzing trace with hash 521248938, now seen corresponding path program 2 times [2021-10-20 05:54:50,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:54:50,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213278920] [2021-10-20 05:54:50,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:54:50,676 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:54:50,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-20 05:54:50,710 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-20 05:54:50,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-20 05:54:50,769 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-20 05:54:50,770 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-20 05:54:50,772 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-20 05:54:50,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-10-20 05:54:50,781 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-20 05:54:50,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 05:54:50 BoogieIcfgContainer [2021-10-20 05:54:50,802 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-20 05:54:50,803 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-20 05:54:50,803 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-20 05:54:50,803 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-20 05:54:50,804 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:54:47" (3/4) ... [2021-10-20 05:54:50,805 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-20 05:54:50,843 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1a2609d-5b79-47a2-8e81-7ca4bb81106c/bin/utaipan-tZwUujhuQw/witness.graphml [2021-10-20 05:54:50,844 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-20 05:54:50,845 INFO L168 Benchmark]: Toolchain (without parser) took 3778.89 ms. Allocated memory was 90.2 MB in the beginning and 138.4 MB in the end (delta: 48.2 MB). Free memory was 60.1 MB in the beginning and 56.2 MB in the end (delta: 3.9 MB). Peak memory consumption was 53.5 MB. Max. memory is 16.1 GB. [2021-10-20 05:54:50,846 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 90.2 MB. Free memory is still 58.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-20 05:54:50,846 INFO L168 Benchmark]: CACSL2BoogieTranslator took 250.07 ms. Allocated memory is still 90.2 MB. Free memory was 60.0 MB in the beginning and 50.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-20 05:54:50,847 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.96 ms. Allocated memory is still 90.2 MB. Free memory was 50.6 MB in the beginning and 49.4 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-20 05:54:50,848 INFO L168 Benchmark]: Boogie Preprocessor took 25.18 ms. Allocated memory is still 90.2 MB. Free memory was 49.2 MB in the beginning and 48.4 MB in the end (delta: 865.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-20 05:54:50,848 INFO L168 Benchmark]: RCFGBuilder took 432.46 ms. Allocated memory is still 90.2 MB. Free memory was 48.2 MB in the beginning and 38.6 MB in the end (delta: 9.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-20 05:54:50,849 INFO L168 Benchmark]: TraceAbstraction took 2978.96 ms. Allocated memory was 90.2 MB in the beginning and 138.4 MB in the end (delta: 48.2 MB). Free memory was 38.0 MB in the beginning and 58.3 MB in the end (delta: -20.3 MB). Peak memory consumption was 28.4 MB. Max. memory is 16.1 GB. [2021-10-20 05:54:50,850 INFO L168 Benchmark]: Witness Printer took 41.01 ms. Allocated memory is still 138.4 MB. Free memory was 58.3 MB in the beginning and 56.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-20 05:54:50,854 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 90.2 MB. Free memory is still 58.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 250.07 ms. Allocated memory is still 90.2 MB. Free memory was 60.0 MB in the beginning and 50.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 37.96 ms. Allocated memory is still 90.2 MB. Free memory was 50.6 MB in the beginning and 49.4 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 25.18 ms. Allocated memory is still 90.2 MB. Free memory was 49.2 MB in the beginning and 48.4 MB in the end (delta: 865.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 432.46 ms. Allocated memory is still 90.2 MB. Free memory was 48.2 MB in the beginning and 38.6 MB in the end (delta: 9.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2978.96 ms. Allocated memory was 90.2 MB in the beginning and 138.4 MB in the end (delta: 48.2 MB). Free memory was 38.0 MB in the beginning and 58.3 MB in the end (delta: -20.3 MB). Peak memory consumption was 28.4 MB. Max. memory is 16.1 GB. * Witness Printer took 41.01 ms. Allocated memory is still 138.4 MB. Free memory was 58.3 MB in the beginning and 56.2 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: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 8]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L25] int i=0; [L26] COND TRUE i<5 [L27] i++ [L20] (b) ? (0) : __blast_assert () [L26] COND TRUE i<5 [L27] i++ [L20] (b) ? (0) : __blast_assert () [L26] COND TRUE i<5 [L27] i++ [L20] (b) ? (0) : __blast_assert () [L8] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2856.7ms, OverallIterations: 3, TraceHistogramMax: 3, EmptinessCheckTime: 10.8ms, AutomataDifference: 219.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 8 SDtfs, 11 SDslu, 18 SDs, 0 SdLazy, 28 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 53.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 780.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=2, InterpolantAutomatonStates: 13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 27.7ms AutomataMinimizationTime, 2 MinimizatonAttempts, 3 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 25.0ms SsaConstructionTime, 116.2ms SatisfiabilityAnalysisTime, 413.8ms InterpolantComputationTime, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 51 SizeOfPredicates, 2 NumberOfNonLiveVariables, 51 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 0/6 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: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-20 05:54:50,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1a2609d-5b79-47a2-8e81-7ca4bb81106c/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...