./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/forester-heap/dll-01-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a58218-a180-4d62-afdf-5f4909c377a5/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a58218-a180-4d62-afdf-5f4909c377a5/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a58218-a180-4d62-afdf-5f4909c377a5/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a58218-a180-4d62-afdf-5f4909c377a5/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/forester-heap/dll-01-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a58218-a180-4d62-afdf-5f4909c377a5/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a58218-a180-4d62-afdf-5f4909c377a5/bin/utaipan-WLngWcDbfI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cdf63a831807312c569006a76efbe1414243703d ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:32:47,211 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:32:47,214 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:32:47,271 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:32:47,272 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:32:47,278 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:32:47,280 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:32:47,284 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:32:47,287 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:32:47,292 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:32:47,293 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:32:47,295 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:32:47,295 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:32:47,298 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:32:47,300 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:32:47,302 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:32:47,303 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:32:47,307 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:32:47,309 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:32:47,317 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:32:47,319 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:32:47,320 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:32:47,323 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:32:47,324 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:32:47,333 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:32:47,334 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:32:47,334 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:32:47,336 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:32:47,336 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:32:47,338 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:32:47,338 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:32:47,339 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:32:47,341 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:32:47,342 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:32:47,343 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:32:47,344 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:32:47,345 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:32:47,345 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:32:47,345 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:32:47,346 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:32:47,347 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:32:47,349 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a58218-a180-4d62-afdf-5f4909c377a5/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:32:47,392 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:32:47,392 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:32:47,394 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:32:47,394 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:32:47,394 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:32:47,395 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:32:47,395 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:32:47,395 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:32:47,396 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:32:47,396 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:32:47,403 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:32:47,404 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:32:47,404 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:32:47,404 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:32:47,405 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:32:47,406 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:32:47,406 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:32:47,407 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:32:47,407 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:32:47,407 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:32:47,408 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:32:47,408 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:32:47,408 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:32:47,408 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:32:47,409 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:32:47,409 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:32:47,409 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:32:47,410 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:32:47,410 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:32:47,412 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:32:47,412 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:32:47,412 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:32:47,413 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:32:47,413 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:32:47,413 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:32:47,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:32:47,414 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:32:47,414 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:32:47,415 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:32:47,415 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_32a58218-a180-4d62-afdf-5f4909c377a5/bin/utaipan-WLngWcDbfI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a58218-a180-4d62-afdf-5f4909c377a5/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cdf63a831807312c569006a76efbe1414243703d [2021-10-11 02:32:47,672 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:32:47,719 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:32:47,723 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:32:47,724 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:32:47,725 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:32:47,726 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a58218-a180-4d62-afdf-5f4909c377a5/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/forester-heap/dll-01-1.i [2021-10-11 02:32:47,809 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a58218-a180-4d62-afdf-5f4909c377a5/bin/utaipan-WLngWcDbfI/data/a1f8ad611/dfe4609becb74bac8337f0ba8acf982b/FLAGf03653198 [2021-10-11 02:32:48,396 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:32:48,397 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a58218-a180-4d62-afdf-5f4909c377a5/sv-benchmarks/c/forester-heap/dll-01-1.i [2021-10-11 02:32:48,409 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a58218-a180-4d62-afdf-5f4909c377a5/bin/utaipan-WLngWcDbfI/data/a1f8ad611/dfe4609becb74bac8337f0ba8acf982b/FLAGf03653198 [2021-10-11 02:32:48,661 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a58218-a180-4d62-afdf-5f4909c377a5/bin/utaipan-WLngWcDbfI/data/a1f8ad611/dfe4609becb74bac8337f0ba8acf982b [2021-10-11 02:32:48,664 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:32:48,666 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:32:48,670 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:32:48,670 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:32:48,674 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:32:48,675 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:32:48" (1/1) ... [2021-10-11 02:32:48,681 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f10734 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:48, skipping insertion in model container [2021-10-11 02:32:48,681 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:32:48" (1/1) ... [2021-10-11 02:32:48,689 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:32:48,759 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:32:49,111 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a58218-a180-4d62-afdf-5f4909c377a5/sv-benchmarks/c/forester-heap/dll-01-1.i[22080,22093] [2021-10-11 02:32:49,131 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a58218-a180-4d62-afdf-5f4909c377a5/sv-benchmarks/c/forester-heap/dll-01-1.i[22353,22366] [2021-10-11 02:32:49,136 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a58218-a180-4d62-afdf-5f4909c377a5/sv-benchmarks/c/forester-heap/dll-01-1.i[22587,22600] [2021-10-11 02:32:49,137 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a58218-a180-4d62-afdf-5f4909c377a5/sv-benchmarks/c/forester-heap/dll-01-1.i[22657,22670] [2021-10-11 02:32:49,141 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a58218-a180-4d62-afdf-5f4909c377a5/sv-benchmarks/c/forester-heap/dll-01-1.i[22924,22937] [2021-10-11 02:32:49,143 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a58218-a180-4d62-afdf-5f4909c377a5/sv-benchmarks/c/forester-heap/dll-01-1.i[23032,23045] [2021-10-11 02:32:49,150 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a58218-a180-4d62-afdf-5f4909c377a5/sv-benchmarks/c/forester-heap/dll-01-1.i[23263,23276] [2021-10-11 02:32:49,152 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a58218-a180-4d62-afdf-5f4909c377a5/sv-benchmarks/c/forester-heap/dll-01-1.i[23343,23356] [2021-10-11 02:32:49,154 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a58218-a180-4d62-afdf-5f4909c377a5/sv-benchmarks/c/forester-heap/dll-01-1.i[23422,23435] [2021-10-11 02:32:49,155 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a58218-a180-4d62-afdf-5f4909c377a5/sv-benchmarks/c/forester-heap/dll-01-1.i[23512,23525] [2021-10-11 02:32:49,158 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a58218-a180-4d62-afdf-5f4909c377a5/sv-benchmarks/c/forester-heap/dll-01-1.i[23690,23703] [2021-10-11 02:32:49,159 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a58218-a180-4d62-afdf-5f4909c377a5/sv-benchmarks/c/forester-heap/dll-01-1.i[23768,23781] [2021-10-11 02:32:49,162 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a58218-a180-4d62-afdf-5f4909c377a5/sv-benchmarks/c/forester-heap/dll-01-1.i[23845,23858] [2021-10-11 02:32:49,174 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:32:49,185 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:32:49,240 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a58218-a180-4d62-afdf-5f4909c377a5/sv-benchmarks/c/forester-heap/dll-01-1.i[22080,22093] [2021-10-11 02:32:49,247 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a58218-a180-4d62-afdf-5f4909c377a5/sv-benchmarks/c/forester-heap/dll-01-1.i[22353,22366] [2021-10-11 02:32:49,250 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a58218-a180-4d62-afdf-5f4909c377a5/sv-benchmarks/c/forester-heap/dll-01-1.i[22587,22600] [2021-10-11 02:32:49,253 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a58218-a180-4d62-afdf-5f4909c377a5/sv-benchmarks/c/forester-heap/dll-01-1.i[22657,22670] [2021-10-11 02:32:49,255 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a58218-a180-4d62-afdf-5f4909c377a5/sv-benchmarks/c/forester-heap/dll-01-1.i[22924,22937] [2021-10-11 02:32:49,258 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a58218-a180-4d62-afdf-5f4909c377a5/sv-benchmarks/c/forester-heap/dll-01-1.i[23032,23045] [2021-10-11 02:32:49,263 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a58218-a180-4d62-afdf-5f4909c377a5/sv-benchmarks/c/forester-heap/dll-01-1.i[23263,23276] [2021-10-11 02:32:49,265 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a58218-a180-4d62-afdf-5f4909c377a5/sv-benchmarks/c/forester-heap/dll-01-1.i[23343,23356] [2021-10-11 02:32:49,266 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a58218-a180-4d62-afdf-5f4909c377a5/sv-benchmarks/c/forester-heap/dll-01-1.i[23422,23435] [2021-10-11 02:32:49,269 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a58218-a180-4d62-afdf-5f4909c377a5/sv-benchmarks/c/forester-heap/dll-01-1.i[23512,23525] [2021-10-11 02:32:49,274 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a58218-a180-4d62-afdf-5f4909c377a5/sv-benchmarks/c/forester-heap/dll-01-1.i[23690,23703] [2021-10-11 02:32:49,276 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a58218-a180-4d62-afdf-5f4909c377a5/sv-benchmarks/c/forester-heap/dll-01-1.i[23768,23781] [2021-10-11 02:32:49,277 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a58218-a180-4d62-afdf-5f4909c377a5/sv-benchmarks/c/forester-heap/dll-01-1.i[23845,23858] [2021-10-11 02:32:49,285 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:32:49,351 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:32:49,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:49 WrapperNode [2021-10-11 02:32:49,353 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:32:49,354 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:32:49,354 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:32:49,354 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:32:49,363 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:49" (1/1) ... [2021-10-11 02:32:49,392 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:49" (1/1) ... [2021-10-11 02:32:49,424 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:32:49,425 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:32:49,425 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:32:49,425 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:32:49,437 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:49" (1/1) ... [2021-10-11 02:32:49,437 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:49" (1/1) ... [2021-10-11 02:32:49,443 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:49" (1/1) ... [2021-10-11 02:32:49,444 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:49" (1/1) ... [2021-10-11 02:32:49,465 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:49" (1/1) ... [2021-10-11 02:32:49,473 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:49" (1/1) ... [2021-10-11 02:32:49,476 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:49" (1/1) ... [2021-10-11 02:32:49,479 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:32:49,480 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:32:49,480 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:32:49,480 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:32:49,481 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:49" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a58218-a180-4d62-afdf-5f4909c377a5/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:32:49,560 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-11 02:32:49,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-11 02:32:49,561 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:32:49,561 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-11 02:32:49,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-11 02:32:49,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:32:49,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:32:49,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:32:50,596 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:32:50,597 INFO L299 CfgBuilder]: Removed 34 assume(true) statements. [2021-10-11 02:32:50,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:32:50 BoogieIcfgContainer [2021-10-11 02:32:50,599 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:32:50,601 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:32:50,602 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:32:50,605 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:32:50,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:32:48" (1/3) ... [2021-10-11 02:32:50,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c2e3cca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:32:50, skipping insertion in model container [2021-10-11 02:32:50,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:49" (2/3) ... [2021-10-11 02:32:50,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c2e3cca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:32:50, skipping insertion in model container [2021-10-11 02:32:50,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:32:50" (3/3) ... [2021-10-11 02:32:50,609 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-01-1.i [2021-10-11 02:32:50,624 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:32:50,628 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 13 error locations. [2021-10-11 02:32:50,639 INFO L253 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2021-10-11 02:32:50,663 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:32:50,664 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:32:50,664 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:32:50,664 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:32:50,664 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:32:50,665 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:32:50,665 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:32:50,665 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:32:50,681 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states. [2021-10-11 02:32:50,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-11 02:32:50,686 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:50,686 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-11 02:32:50,687 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:32:50,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:50,693 INFO L82 PathProgramCache]: Analyzing trace with hash 346217, now seen corresponding path program 1 times [2021-10-11 02:32:50,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:50,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996681010] [2021-10-11 02:32:50,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:50,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:50,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:50,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996681010] [2021-10-11 02:32:50,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:32:50,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:32:50,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344087362] [2021-10-11 02:32:50,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:32:50,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:50,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:32:50,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:32:50,910 INFO L87 Difference]: Start difference. First operand 74 states. Second operand 3 states. [2021-10-11 02:32:50,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:50,991 INFO L93 Difference]: Finished difference Result 163 states and 262 transitions. [2021-10-11 02:32:50,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:32:50,993 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2021-10-11 02:32:50,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:51,002 INFO L225 Difference]: With dead ends: 163 [2021-10-11 02:32:51,003 INFO L226 Difference]: Without dead ends: 89 [2021-10-11 02:32:51,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:32:51,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-10-11 02:32:51,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 71. [2021-10-11 02:32:51,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2021-10-11 02:32:51,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2021-10-11 02:32:51,044 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 3 [2021-10-11 02:32:51,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:51,044 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2021-10-11 02:32:51,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:32:51,045 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2021-10-11 02:32:51,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-11 02:32:51,045 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:51,045 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:32:51,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:32:51,046 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:32:51,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:51,047 INFO L82 PathProgramCache]: Analyzing trace with hash 2042412052, now seen corresponding path program 1 times [2021-10-11 02:32:51,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:51,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884768160] [2021-10-11 02:32:51,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:51,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:51,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:51,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884768160] [2021-10-11 02:32:51,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:32:51,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:32:51,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862468502] [2021-10-11 02:32:51,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:32:51,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:51,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:32:51,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:32:51,166 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 3 states. [2021-10-11 02:32:51,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:51,185 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2021-10-11 02:32:51,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:32:51,190 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2021-10-11 02:32:51,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:51,191 INFO L225 Difference]: With dead ends: 71 [2021-10-11 02:32:51,192 INFO L226 Difference]: Without dead ends: 69 [2021-10-11 02:32:51,192 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 [2021-10-11 02:32:51,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-10-11 02:32:51,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-10-11 02:32:51,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2021-10-11 02:32:51,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2021-10-11 02:32:51,200 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 7 [2021-10-11 02:32:51,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:51,201 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2021-10-11 02:32:51,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:32:51,201 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2021-10-11 02:32:51,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-11 02:32:51,202 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:51,202 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:32:51,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:32:51,202 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:32:51,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:51,209 INFO L82 PathProgramCache]: Analyzing trace with hash 259795555, now seen corresponding path program 1 times [2021-10-11 02:32:51,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:51,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043842674] [2021-10-11 02:32:51,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:51,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:51,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:51,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043842674] [2021-10-11 02:32:51,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:32:51,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:32:51,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333975325] [2021-10-11 02:32:51,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 02:32:51,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:51,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 02:32:51,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:32:51,384 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand 5 states. [2021-10-11 02:32:51,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:51,581 INFO L93 Difference]: Finished difference Result 130 states and 139 transitions. [2021-10-11 02:32:51,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:32:51,582 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2021-10-11 02:32:51,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:51,583 INFO L225 Difference]: With dead ends: 130 [2021-10-11 02:32:51,584 INFO L226 Difference]: Without dead ends: 108 [2021-10-11 02:32:51,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-11 02:32:51,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-10-11 02:32:51,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 66. [2021-10-11 02:32:51,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-10-11 02:32:51,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2021-10-11 02:32:51,595 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 12 [2021-10-11 02:32:51,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:51,595 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2021-10-11 02:32:51,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 02:32:51,595 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2021-10-11 02:32:51,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-11 02:32:51,596 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:51,596 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:32:51,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-11 02:32:51,597 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:32:51,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:51,597 INFO L82 PathProgramCache]: Analyzing trace with hash -536268187, now seen corresponding path program 1 times [2021-10-11 02:32:51,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:51,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962619979] [2021-10-11 02:32:51,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:51,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:51,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:51,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962619979] [2021-10-11 02:32:51,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:32:51,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:32:51,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379180574] [2021-10-11 02:32:51,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 02:32:51,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:51,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 02:32:51,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:32:51,698 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 5 states. [2021-10-11 02:32:51,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:51,853 INFO L93 Difference]: Finished difference Result 105 states and 111 transitions. [2021-10-11 02:32:51,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:32:51,854 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2021-10-11 02:32:51,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:51,855 INFO L225 Difference]: With dead ends: 105 [2021-10-11 02:32:51,855 INFO L226 Difference]: Without dead ends: 103 [2021-10-11 02:32:51,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-11 02:32:51,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-10-11 02:32:51,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 64. [2021-10-11 02:32:51,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-10-11 02:32:51,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2021-10-11 02:32:51,862 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 13 [2021-10-11 02:32:51,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:51,862 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2021-10-11 02:32:51,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 02:32:51,863 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2021-10-11 02:32:51,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-11 02:32:51,863 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:51,864 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:32:51,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-11 02:32:51,864 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:32:51,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:51,865 INFO L82 PathProgramCache]: Analyzing trace with hash -2127403138, now seen corresponding path program 1 times [2021-10-11 02:32:51,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:51,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207313583] [2021-10-11 02:32:51,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:51,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:51,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:51,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207313583] [2021-10-11 02:32:51,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:32:51,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:32:51,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113850153] [2021-10-11 02:32:51,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:32:51,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:51,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:32:51,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:32:51,907 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 3 states. [2021-10-11 02:32:51,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:51,922 INFO L93 Difference]: Finished difference Result 89 states and 96 transitions. [2021-10-11 02:32:51,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:32:51,923 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2021-10-11 02:32:51,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:51,924 INFO L225 Difference]: With dead ends: 89 [2021-10-11 02:32:51,924 INFO L226 Difference]: Without dead ends: 87 [2021-10-11 02:32:51,925 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 [2021-10-11 02:32:51,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-10-11 02:32:51,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 66. [2021-10-11 02:32:51,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-10-11 02:32:51,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2021-10-11 02:32:51,933 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 17 [2021-10-11 02:32:51,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:51,933 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2021-10-11 02:32:51,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:32:51,933 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2021-10-11 02:32:51,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-11 02:32:51,934 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:51,934 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:32:51,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-11 02:32:51,935 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:32:51,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:51,935 INFO L82 PathProgramCache]: Analyzing trace with hash -2127399196, now seen corresponding path program 1 times [2021-10-11 02:32:51,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:51,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040385940] [2021-10-11 02:32:51,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:51,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:51,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:51,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040385940] [2021-10-11 02:32:51,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:32:51,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:32:51,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442927737] [2021-10-11 02:32:51,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:32:51,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:51,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:32:51,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:32:51,980 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand 3 states. [2021-10-11 02:32:52,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:52,006 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2021-10-11 02:32:52,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:32:52,007 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2021-10-11 02:32:52,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:52,008 INFO L225 Difference]: With dead ends: 66 [2021-10-11 02:32:52,008 INFO L226 Difference]: Without dead ends: 64 [2021-10-11 02:32:52,009 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 [2021-10-11 02:32:52,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-11 02:32:52,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-10-11 02:32:52,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-10-11 02:32:52,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2021-10-11 02:32:52,019 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 17 [2021-10-11 02:32:52,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:52,019 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2021-10-11 02:32:52,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:32:52,020 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2021-10-11 02:32:52,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-11 02:32:52,020 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:52,021 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:32:52,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-11 02:32:52,021 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:32:52,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:52,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1823192676, now seen corresponding path program 1 times [2021-10-11 02:32:52,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:52,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653020302] [2021-10-11 02:32:52,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:52,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:52,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:52,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653020302] [2021-10-11 02:32:52,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:32:52,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:32:52,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685696632] [2021-10-11 02:32:52,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:32:52,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:52,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:32:52,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:32:52,126 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand 3 states. [2021-10-11 02:32:52,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:52,140 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2021-10-11 02:32:52,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:32:52,141 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2021-10-11 02:32:52,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:52,143 INFO L225 Difference]: With dead ends: 64 [2021-10-11 02:32:52,143 INFO L226 Difference]: Without dead ends: 62 [2021-10-11 02:32:52,145 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 [2021-10-11 02:32:52,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-11 02:32:52,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-10-11 02:32:52,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-10-11 02:32:52,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2021-10-11 02:32:52,150 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 18 [2021-10-11 02:32:52,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:52,150 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2021-10-11 02:32:52,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:32:52,151 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2021-10-11 02:32:52,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-11 02:32:52,151 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:52,151 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:32:52,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-11 02:32:52,152 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:32:52,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:52,152 INFO L82 PathProgramCache]: Analyzing trace with hash -807933893, now seen corresponding path program 1 times [2021-10-11 02:32:52,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:52,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357107928] [2021-10-11 02:32:52,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:52,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:52,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:52,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357107928] [2021-10-11 02:32:52,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:32:52,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-11 02:32:52,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023450901] [2021-10-11 02:32:52,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-10-11 02:32:52,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:52,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-11 02:32:52,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-10-11 02:32:52,487 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand 8 states. [2021-10-11 02:32:52,995 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2021-10-11 02:32:53,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:53,480 INFO L93 Difference]: Finished difference Result 148 states and 161 transitions. [2021-10-11 02:32:53,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-11 02:32:53,480 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2021-10-11 02:32:53,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:53,482 INFO L225 Difference]: With dead ends: 148 [2021-10-11 02:32:53,482 INFO L226 Difference]: Without dead ends: 146 [2021-10-11 02:32:53,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-10-11 02:32:53,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-10-11 02:32:53,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 79. [2021-10-11 02:32:53,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-10-11 02:32:53,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2021-10-11 02:32:53,492 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 20 [2021-10-11 02:32:53,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:53,493 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2021-10-11 02:32:53,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-10-11 02:32:53,493 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2021-10-11 02:32:53,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-11 02:32:53,494 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:53,494 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:32:53,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-11 02:32:53,494 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:32:53,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:53,495 INFO L82 PathProgramCache]: Analyzing trace with hash -895701575, now seen corresponding path program 1 times [2021-10-11 02:32:53,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:53,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7408879] [2021-10-11 02:32:53,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:53,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:53,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:32:53,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7408879] [2021-10-11 02:32:53,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:32:53,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:32:53,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571567460] [2021-10-11 02:32:53,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:32:53,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:53,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:32:53,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:32:53,530 INFO L87 Difference]: Start difference. First operand 79 states and 88 transitions. Second operand 3 states. [2021-10-11 02:32:53,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:53,576 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2021-10-11 02:32:53,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:32:53,577 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2021-10-11 02:32:53,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:53,578 INFO L225 Difference]: With dead ends: 79 [2021-10-11 02:32:53,578 INFO L226 Difference]: Without dead ends: 77 [2021-10-11 02:32:53,578 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 [2021-10-11 02:32:53,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-10-11 02:32:53,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-10-11 02:32:53,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2021-10-11 02:32:53,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2021-10-11 02:32:53,588 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 23 [2021-10-11 02:32:53,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:53,589 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2021-10-11 02:32:53,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:32:53,589 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2021-10-11 02:32:53,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-11 02:32:53,594 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:53,594 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:32:53,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-11 02:32:53,595 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:32:53,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:53,595 INFO L82 PathProgramCache]: Analyzing trace with hash -157767338, now seen corresponding path program 1 times [2021-10-11 02:32:53,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:53,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299368863] [2021-10-11 02:32:53,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:53,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:32:53,683 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:32:53,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:32:53,741 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:32:53,775 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-11 02:32:53,775 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:32:53,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-11 02:32:53,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:32:53 BoogieIcfgContainer [2021-10-11 02:32:53,830 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:32:53,831 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:32:53,831 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:32:53,832 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:32:53,833 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:32:50" (3/4) ... [2021-10-11 02:32:53,835 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-11 02:32:53,899 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a58218-a180-4d62-afdf-5f4909c377a5/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:32:53,902 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:32:53,905 INFO L168 Benchmark]: Toolchain (without parser) took 5236.78 ms. Allocated memory was 111.1 MB in the beginning and 142.6 MB in the end (delta: 31.5 MB). Free memory was 76.5 MB in the beginning and 100.5 MB in the end (delta: -24.0 MB). Peak memory consumption was 5.7 MB. Max. memory is 16.1 GB. [2021-10-11 02:32:53,907 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 88.1 MB. Free memory is still 49.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:32:53,907 INFO L168 Benchmark]: CACSL2BoogieTranslator took 682.85 ms. Allocated memory is still 111.1 MB. Free memory was 76.5 MB in the beginning and 71.0 MB in the end (delta: 5.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:32:53,908 INFO L168 Benchmark]: Boogie Procedure Inliner took 70.21 ms. Allocated memory is still 111.1 MB. Free memory was 71.0 MB in the beginning and 68.6 MB in the end (delta: 2.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-11 02:32:53,909 INFO L168 Benchmark]: Boogie Preprocessor took 54.81 ms. Allocated memory is still 111.1 MB. Free memory was 68.6 MB in the beginning and 66.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:32:53,909 INFO L168 Benchmark]: RCFGBuilder took 1119.40 ms. Allocated memory was 111.1 MB in the beginning and 142.6 MB in the end (delta: 31.5 MB). Free memory was 66.5 MB in the beginning and 99.5 MB in the end (delta: -33.1 MB). Peak memory consumption was 37.8 MB. Max. memory is 16.1 GB. [2021-10-11 02:32:53,910 INFO L168 Benchmark]: TraceAbstraction took 3229.33 ms. Allocated memory is still 142.6 MB. Free memory was 98.7 MB in the beginning and 103.6 MB in the end (delta: -4.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:32:53,911 INFO L168 Benchmark]: Witness Printer took 71.33 ms. Allocated memory is still 142.6 MB. Free memory was 103.6 MB in the beginning and 100.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:32:53,913 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 88.1 MB. Free memory is still 49.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 682.85 ms. Allocated memory is still 111.1 MB. Free memory was 76.5 MB in the beginning and 71.0 MB in the end (delta: 5.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 70.21 ms. Allocated memory is still 111.1 MB. Free memory was 71.0 MB in the beginning and 68.6 MB in the end (delta: 2.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 54.81 ms. Allocated memory is still 111.1 MB. Free memory was 68.6 MB in the beginning and 66.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1119.40 ms. Allocated memory was 111.1 MB in the beginning and 142.6 MB in the end (delta: 31.5 MB). Free memory was 66.5 MB in the beginning and 99.5 MB in the end (delta: -33.1 MB). Peak memory consumption was 37.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3229.33 ms. Allocated memory is still 142.6 MB. Free memory was 98.7 MB in the beginning and 103.6 MB in the end (delta: -4.9 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 71.33 ms. Allocated memory is still 142.6 MB. Free memory was 103.6 MB in the beginning and 100.5 MB in the end (delta: 3.1 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: 1040]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L1003] SLL* list = malloc(sizeof(SLL)); [L1004] list->next = ((void*)0) [L1005] list->prev = ((void*)0) [L1006] COND FALSE !(!(list != ((void*)0))) [L1006] COND FALSE !(__VERIFIER_nondet_int()) [L1006] list->inner = malloc(sizeof(SLL)) [L1006] EXPR list->inner [L1006] list->inner->next = ((void*)0) [L1006] EXPR list->inner [L1006] list->inner->inner = ((void*)0) [L1006] EXPR list->inner [L1006] EXPR list->inner != ((void*)0) || list->inner == ((void*)0) [L1006] COND FALSE !(!(list->inner != ((void*)0) || list->inner == ((void*)0))) [L1008] SLL* end = list; [L1011] COND FALSE !(__VERIFIER_nondet_int()) [L1022] end = ((void*)0) [L1023] end = list [L1026] COND FALSE !(!(((void*)0) != end)) [L1028] COND TRUE ((void*)0) != end [L1030] int len = 0; [L1031] EXPR end->inner [L1031] SLL* inner = end->inner; [L1032] COND TRUE ((void*)0) != inner [L1034] COND TRUE len == 0 [L1035] len = 1 [L1038] COND FALSE !(!(((void*)0) != inner)) [L1039] EXPR inner->inner [L1039] COND FALSE !(!(((void*)0) == inner->inner)) [L1040] EXPR inner->next [L1040] COND TRUE !(((void*)0) != inner->next) [L1040] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 74 locations, 13 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.1s, OverallIterations: 10, TraceHistogramMax: 1, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 531 SDtfs, 763 SDslu, 601 SDs, 0 SdLazy, 262 SolverSat, 57 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=79occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 187 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 153 NumberOfCodeBlocks, 153 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 121 ConstructedInterpolants, 0 QuantifiedInterpolants, 16069 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 PerfectInterpolantSequences, 1/1 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! Received shutdown request...