./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/forester-heap/sll-token-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cfb2b7-30fc-43dd-bb61-f24bb2c51022/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cfb2b7-30fc-43dd-bb61-f24bb2c51022/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cfb2b7-30fc-43dd-bb61-f24bb2c51022/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cfb2b7-30fc-43dd-bb61-f24bb2c51022/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/forester-heap/sll-token-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cfb2b7-30fc-43dd-bb61-f24bb2c51022/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cfb2b7-30fc-43dd-bb61-f24bb2c51022/bin/utaipan-gh47qXpMRh --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 3438cae56d160b7d84eadaf1a799e28d3e56fe8aa8ad4206f8bf5c7c0818717b --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 08:47:14,191 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 08:47:14,193 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 08:47:14,211 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 08:47:14,211 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 08:47:14,212 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 08:47:14,213 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 08:47:14,215 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 08:47:14,216 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 08:47:14,217 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 08:47:14,218 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 08:47:14,219 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 08:47:14,219 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 08:47:14,220 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 08:47:14,222 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 08:47:14,223 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 08:47:14,223 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 08:47:14,224 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 08:47:14,226 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 08:47:14,228 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 08:47:14,229 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 08:47:14,230 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 08:47:14,231 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 08:47:14,231 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 08:47:14,233 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 08:47:14,233 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 08:47:14,233 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 08:47:14,234 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 08:47:14,234 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 08:47:14,235 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 08:47:14,235 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 08:47:14,235 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 08:47:14,236 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 08:47:14,236 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 08:47:14,237 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 08:47:14,237 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 08:47:14,237 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 08:47:14,238 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 08:47:14,238 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 08:47:14,238 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 08:47:14,239 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 08:47:14,239 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cfb2b7-30fc-43dd-bb61-f24bb2c51022/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 08:47:14,264 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 08:47:14,264 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 08:47:14,264 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 08:47:14,264 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 08:47:14,265 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 08:47:14,265 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 08:47:14,265 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 08:47:14,266 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 08:47:14,266 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 08:47:14,266 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 08:47:14,266 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 08:47:14,266 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 08:47:14,266 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 08:47:14,267 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 08:47:14,267 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 08:47:14,267 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 08:47:14,267 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 08:47:14,267 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 08:47:14,268 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 08:47:14,268 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 08:47:14,268 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 08:47:14,268 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 08:47:14,269 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 08:47:14,269 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 08:47:14,269 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 08:47:14,269 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 08:47:14,269 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 08:47:14,269 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 08:47:14,270 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 08:47:14,270 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 08:47:14,270 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 08:47:14,270 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 08:47:14,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:47:14,270 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 08:47:14,271 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 08:47:14,271 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 08:47:14,271 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 08:47:14,271 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 08:47:14,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 08:47:14,271 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 08:47:14,272 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 08:47:14,272 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cfb2b7-30fc-43dd-bb61-f24bb2c51022/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cfb2b7-30fc-43dd-bb61-f24bb2c51022/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3438cae56d160b7d84eadaf1a799e28d3e56fe8aa8ad4206f8bf5c7c0818717b [2022-12-14 08:47:14,466 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 08:47:14,485 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 08:47:14,488 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 08:47:14,489 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 08:47:14,490 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 08:47:14,491 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cfb2b7-30fc-43dd-bb61-f24bb2c51022/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/forester-heap/sll-token-2.i [2022-12-14 08:47:17,103 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 08:47:17,295 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 08:47:17,296 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cfb2b7-30fc-43dd-bb61-f24bb2c51022/sv-benchmarks/c/forester-heap/sll-token-2.i [2022-12-14 08:47:17,306 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cfb2b7-30fc-43dd-bb61-f24bb2c51022/bin/utaipan-gh47qXpMRh/data/4a0cce02b/ed7f591da5e94c3cbc3afe33aa16c7c4/FLAG3082f5069 [2022-12-14 08:47:17,319 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cfb2b7-30fc-43dd-bb61-f24bb2c51022/bin/utaipan-gh47qXpMRh/data/4a0cce02b/ed7f591da5e94c3cbc3afe33aa16c7c4 [2022-12-14 08:47:17,321 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 08:47:17,322 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 08:47:17,323 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 08:47:17,323 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 08:47:17,326 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 08:47:17,326 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:47:17" (1/1) ... [2022-12-14 08:47:17,327 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4441b230 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:47:17, skipping insertion in model container [2022-12-14 08:47:17,327 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:47:17" (1/1) ... [2022-12-14 08:47:17,332 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 08:47:17,356 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 08:47:17,520 WARN L237 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_75cfb2b7-30fc-43dd-bb61-f24bb2c51022/sv-benchmarks/c/forester-heap/sll-token-2.i[22162,22175] [2022-12-14 08:47:17,525 WARN L237 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_75cfb2b7-30fc-43dd-bb61-f24bb2c51022/sv-benchmarks/c/forester-heap/sll-token-2.i[22311,22324] [2022-12-14 08:47:17,526 WARN L237 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_75cfb2b7-30fc-43dd-bb61-f24bb2c51022/sv-benchmarks/c/forester-heap/sll-token-2.i[22402,22415] [2022-12-14 08:47:17,526 WARN L237 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_75cfb2b7-30fc-43dd-bb61-f24bb2c51022/sv-benchmarks/c/forester-heap/sll-token-2.i[22484,22497] [2022-12-14 08:47:17,527 WARN L237 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_75cfb2b7-30fc-43dd-bb61-f24bb2c51022/sv-benchmarks/c/forester-heap/sll-token-2.i[22562,22575] [2022-12-14 08:47:17,528 WARN L237 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_75cfb2b7-30fc-43dd-bb61-f24bb2c51022/sv-benchmarks/c/forester-heap/sll-token-2.i[22708,22721] [2022-12-14 08:47:17,530 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:47:17,537 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 08:47:17,560 WARN L237 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_75cfb2b7-30fc-43dd-bb61-f24bb2c51022/sv-benchmarks/c/forester-heap/sll-token-2.i[22162,22175] [2022-12-14 08:47:17,561 WARN L237 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_75cfb2b7-30fc-43dd-bb61-f24bb2c51022/sv-benchmarks/c/forester-heap/sll-token-2.i[22311,22324] [2022-12-14 08:47:17,562 WARN L237 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_75cfb2b7-30fc-43dd-bb61-f24bb2c51022/sv-benchmarks/c/forester-heap/sll-token-2.i[22402,22415] [2022-12-14 08:47:17,563 WARN L237 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_75cfb2b7-30fc-43dd-bb61-f24bb2c51022/sv-benchmarks/c/forester-heap/sll-token-2.i[22484,22497] [2022-12-14 08:47:17,563 WARN L237 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_75cfb2b7-30fc-43dd-bb61-f24bb2c51022/sv-benchmarks/c/forester-heap/sll-token-2.i[22562,22575] [2022-12-14 08:47:17,565 WARN L237 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_75cfb2b7-30fc-43dd-bb61-f24bb2c51022/sv-benchmarks/c/forester-heap/sll-token-2.i[22708,22721] [2022-12-14 08:47:17,565 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:47:17,581 INFO L208 MainTranslator]: Completed translation [2022-12-14 08:47:17,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:47:17 WrapperNode [2022-12-14 08:47:17,582 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 08:47:17,582 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 08:47:17,583 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 08:47:17,583 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 08:47:17,588 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:47:17" (1/1) ... [2022-12-14 08:47:17,597 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:47:17" (1/1) ... [2022-12-14 08:47:17,610 INFO L138 Inliner]: procedures = 119, calls = 31, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 123 [2022-12-14 08:47:17,611 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 08:47:17,611 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 08:47:17,611 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 08:47:17,611 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 08:47:17,618 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:47:17" (1/1) ... [2022-12-14 08:47:17,618 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:47:17" (1/1) ... [2022-12-14 08:47:17,620 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:47:17" (1/1) ... [2022-12-14 08:47:17,620 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:47:17" (1/1) ... [2022-12-14 08:47:17,625 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:47:17" (1/1) ... [2022-12-14 08:47:17,628 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:47:17" (1/1) ... [2022-12-14 08:47:17,629 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:47:17" (1/1) ... [2022-12-14 08:47:17,630 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:47:17" (1/1) ... [2022-12-14 08:47:17,631 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 08:47:17,632 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 08:47:17,632 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 08:47:17,632 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 08:47:17,632 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:47:17" (1/1) ... [2022-12-14 08:47:17,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:47:17,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cfb2b7-30fc-43dd-bb61-f24bb2c51022/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:47:17,657 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cfb2b7-30fc-43dd-bb61-f24bb2c51022/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 08:47:17,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cfb2b7-30fc-43dd-bb61-f24bb2c51022/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 08:47:17,689 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 08:47:17,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 08:47:17,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 08:47:17,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 08:47:17,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-14 08:47:17,690 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-14 08:47:17,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 08:47:17,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 08:47:17,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 08:47:17,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 08:47:17,775 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 08:47:17,777 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 08:47:17,938 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 08:47:17,951 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 08:47:17,952 INFO L300 CfgBuilder]: Removed 15 assume(true) statements. [2022-12-14 08:47:17,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:47:17 BoogieIcfgContainer [2022-12-14 08:47:17,954 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 08:47:17,956 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 08:47:17,956 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 08:47:17,958 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 08:47:17,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 08:47:17" (1/3) ... [2022-12-14 08:47:17,959 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65a11e0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:47:17, skipping insertion in model container [2022-12-14 08:47:17,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:47:17" (2/3) ... [2022-12-14 08:47:17,959 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65a11e0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:47:17, skipping insertion in model container [2022-12-14 08:47:17,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:47:17" (3/3) ... [2022-12-14 08:47:17,961 INFO L112 eAbstractionObserver]: Analyzing ICFG sll-token-2.i [2022-12-14 08:47:17,975 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 08:47:17,976 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2022-12-14 08:47:18,016 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 08:47:18,021 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4a87f692, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 08:47:18,021 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-12-14 08:47:18,026 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 40 states have internal predecessors, (64), 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) [2022-12-14 08:47:18,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 08:47:18,030 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:47:18,031 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 08:47:18,031 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-14 08:47:18,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:47:18,035 INFO L85 PathProgramCache]: Analyzing trace with hash 177379778, now seen corresponding path program 1 times [2022-12-14 08:47:18,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:47:18,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356017696] [2022-12-14 08:47:18,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:47:18,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:47:18,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:47:18,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:47:18,192 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:47:18,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356017696] [2022-12-14 08:47:18,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356017696] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:47:18,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:47:18,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 08:47:18,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736662182] [2022-12-14 08:47:18,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:47:18,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 08:47:18,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:47:18,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 08:47:18,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 08:47:18,222 INFO L87 Difference]: Start difference. First operand has 41 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 40 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2022-12-14 08:47:18,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:47:18,244 INFO L93 Difference]: Finished difference Result 81 states and 127 transitions. [2022-12-14 08:47:18,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 08:47:18,246 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2022-12-14 08:47:18,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:47:18,253 INFO L225 Difference]: With dead ends: 81 [2022-12-14 08:47:18,254 INFO L226 Difference]: Without dead ends: 38 [2022-12-14 08:47:18,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 08:47:18,260 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:47:18,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:47:18,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-12-14 08:47:18,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-12-14 08:47:18,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 32 states have (on average 1.25) internal successors, (40), 37 states have internal predecessors, (40), 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) [2022-12-14 08:47:18,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2022-12-14 08:47:18,291 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 5 [2022-12-14 08:47:18,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:47:18,292 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2022-12-14 08:47:18,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2022-12-14 08:47:18,292 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2022-12-14 08:47:18,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 08:47:18,293 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:47:18,293 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 08:47:18,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 08:47:18,293 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-14 08:47:18,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:47:18,294 INFO L85 PathProgramCache]: Analyzing trace with hash 176613157, now seen corresponding path program 1 times [2022-12-14 08:47:18,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:47:18,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519304987] [2022-12-14 08:47:18,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:47:18,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:47:18,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:47:18,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:47:18,397 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:47:18,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519304987] [2022-12-14 08:47:18,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519304987] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:47:18,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:47:18,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:47:18,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739397888] [2022-12-14 08:47:18,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:47:18,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:47:18,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:47:18,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:47:18,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:47:18,401 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-12-14 08:47:18,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:47:18,440 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2022-12-14 08:47:18,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:47:18,440 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2022-12-14 08:47:18,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:47:18,441 INFO L225 Difference]: With dead ends: 38 [2022-12-14 08:47:18,441 INFO L226 Difference]: Without dead ends: 36 [2022-12-14 08:47:18,442 INFO L412 NwaCegarLoop]: 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 [2022-12-14 08:47:18,443 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:47:18,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 53 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:47:18,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-12-14 08:47:18,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-12-14 08:47:18,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 35 states have internal predecessors, (38), 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) [2022-12-14 08:47:18,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2022-12-14 08:47:18,450 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 5 [2022-12-14 08:47:18,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:47:18,450 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2022-12-14 08:47:18,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-12-14 08:47:18,451 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2022-12-14 08:47:18,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 08:47:18,451 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:47:18,451 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 08:47:18,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 08:47:18,452 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-14 08:47:18,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:47:18,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1179997057, now seen corresponding path program 1 times [2022-12-14 08:47:18,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:47:18,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253505036] [2022-12-14 08:47:18,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:47:18,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:47:18,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:47:18,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:47:18,536 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:47:18,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253505036] [2022-12-14 08:47:18,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253505036] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:47:18,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:47:18,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:47:18,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11700484] [2022-12-14 08:47:18,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:47:18,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:47:18,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:47:18,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:47:18,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:47:18,538 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-12-14 08:47:18,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:47:18,605 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2022-12-14 08:47:18,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:47:18,606 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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 [2022-12-14 08:47:18,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:47:18,606 INFO L225 Difference]: With dead ends: 62 [2022-12-14 08:47:18,607 INFO L226 Difference]: Without dead ends: 60 [2022-12-14 08:47:18,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:47:18,608 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 76 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:47:18,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 44 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:47:18,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-12-14 08:47:18,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 34. [2022-12-14 08:47:18,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 30 states have (on average 1.2) internal successors, (36), 33 states have internal predecessors, (36), 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) [2022-12-14 08:47:18,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2022-12-14 08:47:18,615 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 6 [2022-12-14 08:47:18,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:47:18,615 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2022-12-14 08:47:18,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-12-14 08:47:18,615 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2022-12-14 08:47:18,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 08:47:18,616 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:47:18,616 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:47:18,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 08:47:18,616 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-14 08:47:18,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:47:18,617 INFO L85 PathProgramCache]: Analyzing trace with hash -941369743, now seen corresponding path program 1 times [2022-12-14 08:47:18,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:47:18,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053093992] [2022-12-14 08:47:18,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:47:18,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:47:18,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:47:18,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:47:18,698 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:47:18,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053093992] [2022-12-14 08:47:18,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053093992] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:47:18,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:47:18,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 08:47:18,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323970784] [2022-12-14 08:47:18,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:47:18,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 08:47:18,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:47:18,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 08:47:18,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:47:18,700 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:47:18,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:47:18,757 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2022-12-14 08:47:18,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 08:47:18,758 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-14 08:47:18,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:47:18,758 INFO L225 Difference]: With dead ends: 34 [2022-12-14 08:47:18,758 INFO L226 Difference]: Without dead ends: 32 [2022-12-14 08:47:18,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:47:18,760 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 3 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:47:18,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 87 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:47:18,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-12-14 08:47:18,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-12-14 08:47:18,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 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) [2022-12-14 08:47:18,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2022-12-14 08:47:18,765 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 11 [2022-12-14 08:47:18,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:47:18,766 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2022-12-14 08:47:18,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:47:18,766 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2022-12-14 08:47:18,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 08:47:18,766 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:47:18,767 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:47:18,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 08:47:18,767 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-14 08:47:18,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:47:18,767 INFO L85 PathProgramCache]: Analyzing trace with hash -941332007, now seen corresponding path program 1 times [2022-12-14 08:47:18,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:47:18,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335027816] [2022-12-14 08:47:18,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:47:18,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:47:18,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:47:19,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:47:19,001 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:47:19,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335027816] [2022-12-14 08:47:19,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335027816] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:47:19,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:47:19,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 08:47:19,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249673568] [2022-12-14 08:47:19,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:47:19,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 08:47:19,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:47:19,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 08:47:19,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:47:19,003 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:47:19,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:47:19,081 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2022-12-14 08:47:19,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 08:47:19,081 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-14 08:47:19,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:47:19,082 INFO L225 Difference]: With dead ends: 67 [2022-12-14 08:47:19,082 INFO L226 Difference]: Without dead ends: 43 [2022-12-14 08:47:19,082 INFO L412 NwaCegarLoop]: 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 [2022-12-14 08:47:19,083 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 12 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:47:19,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 89 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:47:19,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-12-14 08:47:19,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2022-12-14 08:47:19,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 38 states have internal predecessors, (42), 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) [2022-12-14 08:47:19,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2022-12-14 08:47:19,091 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 11 [2022-12-14 08:47:19,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:47:19,091 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2022-12-14 08:47:19,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:47:19,091 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2022-12-14 08:47:19,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 08:47:19,092 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:47:19,092 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:47:19,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 08:47:19,092 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-14 08:47:19,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:47:19,093 INFO L85 PathProgramCache]: Analyzing trace with hash -207114599, now seen corresponding path program 1 times [2022-12-14 08:47:19,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:47:19,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346110627] [2022-12-14 08:47:19,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:47:19,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:47:19,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:47:19,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:47:19,367 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:47:19,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346110627] [2022-12-14 08:47:19,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346110627] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:47:19,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:47:19,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 08:47:19,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857281280] [2022-12-14 08:47:19,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:47:19,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:47:19,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:47:19,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:47:19,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:47:19,369 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 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) [2022-12-14 08:47:19,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:47:19,458 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2022-12-14 08:47:19,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 08:47:19,458 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 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 15 [2022-12-14 08:47:19,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:47:19,459 INFO L225 Difference]: With dead ends: 49 [2022-12-14 08:47:19,459 INFO L226 Difference]: Without dead ends: 47 [2022-12-14 08:47:19,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-14 08:47:19,460 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 10 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:47:19,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 104 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:47:19,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-12-14 08:47:19,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2022-12-14 08:47:19,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 44 states have internal predecessors, (48), 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) [2022-12-14 08:47:19,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2022-12-14 08:47:19,468 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 15 [2022-12-14 08:47:19,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:47:19,468 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2022-12-14 08:47:19,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 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) [2022-12-14 08:47:19,468 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2022-12-14 08:47:19,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 08:47:19,469 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:47:19,469 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:47:19,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 08:47:19,469 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-14 08:47:19,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:47:19,470 INFO L85 PathProgramCache]: Analyzing trace with hash -542473854, now seen corresponding path program 1 times [2022-12-14 08:47:19,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:47:19,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828547814] [2022-12-14 08:47:19,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:47:19,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:47:19,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:47:19,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:47:19,741 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:47:19,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828547814] [2022-12-14 08:47:19,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828547814] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:47:19,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911184615] [2022-12-14 08:47:19,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:47:19,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:47:19,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cfb2b7-30fc-43dd-bb61-f24bb2c51022/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:47:19,743 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cfb2b7-30fc-43dd-bb61-f24bb2c51022/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:47:19,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cfb2b7-30fc-43dd-bb61-f24bb2c51022/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 08:47:19,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:47:19,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-14 08:47:19,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:47:19,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 08:47:19,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 08:47:19,950 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 08:47:19,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-14 08:47:19,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:47:19,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2022-12-14 08:47:19,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 08:47:20,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:47:20,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:47:20,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-12-14 08:47:20,078 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-12-14 08:47:20,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 08:47:20,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 08:47:20,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:47:20,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:47:20,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:47:20,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911184615] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 08:47:20,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 08:47:20,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 10 [2022-12-14 08:47:20,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590666350] [2022-12-14 08:47:20,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:47:20,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:47:20,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:47:20,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:47:20,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-12-14 08:47:20,260 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 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) [2022-12-14 08:47:21,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:47:21,324 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2022-12-14 08:47:21,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 08:47:21,324 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 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 15 [2022-12-14 08:47:21,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:47:21,325 INFO L225 Difference]: With dead ends: 57 [2022-12-14 08:47:21,325 INFO L226 Difference]: Without dead ends: 55 [2022-12-14 08:47:21,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=134, Unknown=1, NotChecked=0, Total=182 [2022-12-14 08:47:21,327 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 25 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:47:21,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 105 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 58 Invalid, 2 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 08:47:21,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-12-14 08:47:21,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2022-12-14 08:47:21,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 48 states have internal predecessors, (53), 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) [2022-12-14 08:47:21,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2022-12-14 08:47:21,337 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 15 [2022-12-14 08:47:21,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:47:21,337 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2022-12-14 08:47:21,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 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) [2022-12-14 08:47:21,338 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2022-12-14 08:47:21,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 08:47:21,338 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:47:21,339 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:47:21,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cfb2b7-30fc-43dd-bb61-f24bb2c51022/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 08:47:21,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cfb2b7-30fc-43dd-bb61-f24bb2c51022/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:47:21,541 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-14 08:47:21,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:47:21,542 INFO L85 PathProgramCache]: Analyzing trace with hash 98027970, now seen corresponding path program 1 times [2022-12-14 08:47:21,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:47:21,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258579799] [2022-12-14 08:47:21,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:47:21,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:47:21,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:47:21,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:47:21,846 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:47:21,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258579799] [2022-12-14 08:47:21,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258579799] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:47:21,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615794652] [2022-12-14 08:47:21,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:47:21,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:47:21,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cfb2b7-30fc-43dd-bb61-f24bb2c51022/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:47:21,848 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cfb2b7-30fc-43dd-bb61-f24bb2c51022/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:47:21,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cfb2b7-30fc-43dd-bb61-f24bb2c51022/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 08:47:21,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:47:21,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-14 08:47:21,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:47:21,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 08:47:21,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 08:47:21,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:47:21,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2022-12-14 08:47:22,004 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 08:47:22,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-12-14 08:47:22,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-14 08:47:22,033 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 08:47:22,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-14 08:47:22,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:47:22,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:47:22,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-12-14 08:47:22,142 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-12-14 08:47:22,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 08:47:22,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 08:47:22,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:47:22,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:47:22,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:47:22,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615794652] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 08:47:22,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 08:47:22,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2022-12-14 08:47:22,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619271550] [2022-12-14 08:47:22,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:47:22,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:47:22,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:47:22,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:47:22,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-12-14 08:47:22,288 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:47:24,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 08:47:24,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:47:24,635 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2022-12-14 08:47:24,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 08:47:24,635 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-12-14 08:47:24,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:47:24,636 INFO L225 Difference]: With dead ends: 67 [2022-12-14 08:47:24,636 INFO L226 Difference]: Without dead ends: 51 [2022-12-14 08:47:24,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=159, Unknown=1, NotChecked=0, Total=210 [2022-12-14 08:47:24,637 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 19 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:47:24,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 108 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 62 Invalid, 2 Unknown, 0 Unchecked, 2.3s Time] [2022-12-14 08:47:24,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-12-14 08:47:24,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2022-12-14 08:47:24,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 48 states have internal predecessors, (52), 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) [2022-12-14 08:47:24,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2022-12-14 08:47:24,647 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 19 [2022-12-14 08:47:24,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:47:24,647 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2022-12-14 08:47:24,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:47:24,647 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2022-12-14 08:47:24,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 08:47:24,648 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:47:24,648 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:47:24,652 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cfb2b7-30fc-43dd-bb61-f24bb2c51022/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 08:47:24,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cfb2b7-30fc-43dd-bb61-f24bb2c51022/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:47:24,849 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-14 08:47:24,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:47:24,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1598318378, now seen corresponding path program 1 times [2022-12-14 08:47:24,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:47:24,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966253783] [2022-12-14 08:47:24,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:47:24,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:47:24,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:47:24,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:47:24,914 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:47:24,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966253783] [2022-12-14 08:47:24,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966253783] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:47:24,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:47:24,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 08:47:24,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229337323] [2022-12-14 08:47:24,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:47:24,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 08:47:24,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:47:24,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 08:47:24,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:47:24,915 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 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) [2022-12-14 08:47:24,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:47:24,994 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2022-12-14 08:47:24,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 08:47:24,994 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 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 21 [2022-12-14 08:47:24,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:47:24,995 INFO L225 Difference]: With dead ends: 49 [2022-12-14 08:47:24,995 INFO L226 Difference]: Without dead ends: 30 [2022-12-14 08:47:24,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:47:24,995 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:47:24,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 88 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:47:24,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-12-14 08:47:24,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-12-14 08:47:24,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 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) [2022-12-14 08:47:24,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2022-12-14 08:47:24,999 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 21 [2022-12-14 08:47:24,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:47:24,999 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2022-12-14 08:47:25,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 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) [2022-12-14 08:47:25,000 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2022-12-14 08:47:25,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 08:47:25,000 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:47:25,000 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:47:25,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 08:47:25,001 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-14 08:47:25,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:47:25,001 INFO L85 PathProgramCache]: Analyzing trace with hash 2016055281, now seen corresponding path program 1 times [2022-12-14 08:47:25,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:47:25,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798154362] [2022-12-14 08:47:25,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:47:25,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:47:25,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:47:25,568 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:47:25,569 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:47:25,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798154362] [2022-12-14 08:47:25,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798154362] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:47:25,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808135556] [2022-12-14 08:47:25,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:47:25,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:47:25,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cfb2b7-30fc-43dd-bb61-f24bb2c51022/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:47:25,570 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cfb2b7-30fc-43dd-bb61-f24bb2c51022/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:47:25,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cfb2b7-30fc-43dd-bb61-f24bb2c51022/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 08:47:25,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:47:25,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-14 08:47:25,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:47:25,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 08:47:25,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-12-14 08:47:25,736 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 08:47:25,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 08:47:25,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-14 08:47:25,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-12-14 08:47:25,772 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 08:47:25,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 08:47:25,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-14 08:47:25,815 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 08:47:25,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-14 08:47:25,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:47:26,001 INFO L321 Elim1Store]: treesize reduction 28, result has 28.2 percent of original size [2022-12-14 08:47:26,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 66 [2022-12-14 08:47:26,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:47:26,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:47:26,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 25 [2022-12-14 08:47:26,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 29 [2022-12-14 08:47:26,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:47:26,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-14 08:47:26,060 INFO L321 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2022-12-14 08:47:26,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-12-14 08:47:26,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 08:47:26,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-12-14 08:47:26,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 08:47:26,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:47:26,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:47:26,316 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:47:26,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 51 [2022-12-14 08:47:26,333 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:47:26,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 85 [2022-12-14 08:47:26,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 17 [2022-12-14 08:47:26,609 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:47:26,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 88 [2022-12-14 08:47:26,621 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:47:26,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 108 [2022-12-14 08:47:26,638 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:47:26,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 210 treesize of output 161 [2022-12-14 08:47:26,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 141 [2022-12-14 08:47:26,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 137 [2022-12-14 08:47:26,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 133 [2022-12-14 08:47:26,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 131 [2022-12-14 08:47:26,689 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:47:26,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 178 treesize of output 181 [2022-12-14 08:47:26,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 161 [2022-12-14 08:47:26,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 159 [2022-12-14 08:47:27,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:47:27,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808135556] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:47:27,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1520868379] [2022-12-14 08:47:27,642 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 08:47:27,643 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:47:27,645 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:47:27,649 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:47:27,649 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:47:27,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:47:27,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:47:27,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:47:27,714 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 08:47:27,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 41 [2022-12-14 08:47:27,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:47:27,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-12-14 08:47:27,769 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-12-14 08:47:27,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 30 [2022-12-14 08:47:27,821 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 08:47:27,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2022-12-14 08:47:27,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:47:27,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-12-14 08:47:27,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:47:27,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 11 [2022-12-14 08:47:27,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:47:27,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 11 [2022-12-14 08:47:27,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:47:27,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:47:27,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:47:27,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:47:27,903 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-12-14 08:47:27,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 49 [2022-12-14 08:47:27,957 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 08:47:27,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2022-12-14 08:47:28,031 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 08:47:28,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 08:47:28,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:47:28,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:47:28,092 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 08:47:28,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 198 treesize of output 104 [2022-12-14 08:47:28,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 47 [2022-12-14 08:47:28,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:47:28,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:47:28,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:47:28,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:47:28,166 INFO L321 Elim1Store]: treesize reduction 46, result has 31.3 percent of original size [2022-12-14 08:47:28,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 56 [2022-12-14 08:47:28,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:47:28,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 22 [2022-12-14 08:47:28,271 INFO L321 Elim1Store]: treesize reduction 60, result has 35.5 percent of original size [2022-12-14 08:47:28,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 31 treesize of output 50 [2022-12-14 08:47:28,390 INFO L321 Elim1Store]: treesize reduction 84, result has 34.9 percent of original size [2022-12-14 08:47:28,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 41 treesize of output 73 [2022-12-14 08:47:28,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:47:28,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:47:28,536 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:47:28,602 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 08:47:28,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 410 treesize of output 351 [2022-12-14 08:47:28,630 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:47:28,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:47:28,632 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:47:28,680 INFO L321 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2022-12-14 08:47:28,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 402 treesize of output 384 [2022-12-14 08:47:28,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:47:28,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:47:28,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:47:28,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:47:28,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:47:28,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:47:28,730 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:47:28,750 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-12-14 08:47:28,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 374 treesize of output 354 [2022-12-14 08:47:28,872 INFO L321 Elim1Store]: treesize reduction 170, result has 15.0 percent of original size [2022-12-14 08:47:28,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 365 treesize of output 371 [2022-12-14 08:47:28,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:47:29,036 INFO L321 Elim1Store]: treesize reduction 218, result has 17.4 percent of original size [2022-12-14 08:47:29,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 5 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 370 treesize of output 391 [2022-12-14 08:47:29,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:47:29,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:47:29,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:47:29,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:47:29,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:47:29,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:47:29,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:47:29,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:47:29,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:47:29,089 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-12-14 08:47:29,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 372 treesize of output 363 [2022-12-14 08:47:29,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 08:47:29,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 08:47:29,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:47:29,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 08:47:29,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:47:29,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 08:47:29,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:47:29,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 08:47:29,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:47:29,426 INFO L321 Elim1Store]: treesize reduction 19, result has 40.6 percent of original size [2022-12-14 08:47:29,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 21 [2022-12-14 08:47:29,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:47:29,447 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:47:29,471 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-12-14 08:47:29,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 25 [2022-12-14 08:47:29,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:47:29,490 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:47:29,514 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 08:47:29,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 36 [2022-12-14 08:47:29,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-12-14 08:47:29,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 13 [2022-12-14 08:47:29,683 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:47:30,463 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1549#(and (not (= (select (select |#memory_int| |ULTIMATE.start_main_~x~0#1.base|) (+ |ULTIMATE.start_main_~x~0#1.offset| 4)) 1)) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~x~0#1.base|) (+ |ULTIMATE.start_main_~x~0#1.offset| 4)) 0)) (= |ULTIMATE.start_main_~head~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 08:47:30,463 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:47:30,463 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:47:30,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 13 [2022-12-14 08:47:30,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651054100] [2022-12-14 08:47:30,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:47:30,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 08:47:30,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:47:30,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 08:47:30,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-12-14 08:47:30,465 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 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) [2022-12-14 08:47:30,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:47:30,777 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2022-12-14 08:47:30,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 08:47:30,778 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 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 21 [2022-12-14 08:47:30,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:47:30,778 INFO L225 Difference]: With dead ends: 65 [2022-12-14 08:47:30,778 INFO L226 Difference]: Without dead ends: 49 [2022-12-14 08:47:30,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2022-12-14 08:47:30,779 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 12 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:47:30,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 153 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:47:30,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-12-14 08:47:30,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2022-12-14 08:47:30,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 44 states have internal predecessors, (47), 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) [2022-12-14 08:47:30,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2022-12-14 08:47:30,784 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 21 [2022-12-14 08:47:30,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:47:30,784 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2022-12-14 08:47:30,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 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) [2022-12-14 08:47:30,784 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2022-12-14 08:47:30,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 08:47:30,784 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:47:30,785 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:47:30,790 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cfb2b7-30fc-43dd-bb61-f24bb2c51022/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 08:47:30,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cfb2b7-30fc-43dd-bb61-f24bb2c51022/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 08:47:30,985 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-14 08:47:30,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:47:30,986 INFO L85 PathProgramCache]: Analyzing trace with hash 700254385, now seen corresponding path program 1 times [2022-12-14 08:47:30,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:47:30,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103323472] [2022-12-14 08:47:30,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:47:30,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:47:31,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:47:31,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:47:31,667 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:47:31,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103323472] [2022-12-14 08:47:31,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103323472] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:47:31,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326709644] [2022-12-14 08:47:31,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:47:31,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:47:31,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cfb2b7-30fc-43dd-bb61-f24bb2c51022/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:47:31,668 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cfb2b7-30fc-43dd-bb61-f24bb2c51022/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:47:31,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cfb2b7-30fc-43dd-bb61-f24bb2c51022/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 08:47:31,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:47:31,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 61 conjunts are in the unsatisfiable core [2022-12-14 08:47:31,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:47:31,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 08:47:31,819 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 08:47:31,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-14 08:47:31,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-12-14 08:47:31,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 08:47:31,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-12-14 08:47:31,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 08:47:32,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:47:32,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:47:32,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 48 [2022-12-14 08:47:32,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 23 [2022-12-14 08:47:32,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:47:32,086 INFO L321 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2022-12-14 08:47:32,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 54 [2022-12-14 08:47:32,115 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2022-12-14 08:47:32,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 46 [2022-12-14 08:47:32,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2022-12-14 08:47:32,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-12-14 08:47:32,531 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 08:47:32,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 48 [2022-12-14 08:47:32,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2022-12-14 08:47:32,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 08:47:32,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:47:32,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:47:32,712 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:47:32,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 93 [2022-12-14 08:47:32,720 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:47:32,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 100 [2022-12-14 08:47:32,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 247 treesize of output 169 [2022-12-14 08:47:33,012 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:47:33,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 165 treesize of output 150 [2022-12-14 08:47:33,023 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:47:33,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 173 treesize of output 158 [2022-12-14 08:47:33,147 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:47:33,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 1759 treesize of output 1312 [2022-12-14 08:47:34,019 INFO L321 Elim1Store]: treesize reduction 294, result has 60.5 percent of original size [2022-12-14 08:47:34,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 12 new quantified variables, introduced 55 case distinctions, treesize of input 7452 treesize of output 7201 [2022-12-14 08:47:34,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6132 treesize of output 5660 [2022-12-14 08:47:34,470 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:47:34,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 5680 treesize of output 5266 [2022-12-14 08:47:34,808 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:47:34,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 5226 treesize of output 4576 [2022-12-14 08:47:35,050 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:47:35,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 4618 treesize of output 4530 [2022-12-14 08:47:35,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5072 treesize of output 5000 [2022-12-14 08:47:35,553 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:47:35,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 5000 treesize of output 4970 [2022-12-14 08:47:35,831 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:47:35,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 4984 treesize of output 4694 [2022-12-14 08:47:36,063 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:47:36,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 4208 treesize of output 4168