./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V --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 503e46fe74670dc8b1fd2e8b2c5a408fc01c83cb421ff9aefb8796417315d291 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:09:54,398 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:09:54,401 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:09:54,435 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:09:54,436 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:09:54,444 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:09:54,448 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:09:54,452 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:09:54,455 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:09:54,460 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:09:54,462 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:09:54,464 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:09:54,464 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:09:54,467 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:09:54,469 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:09:54,471 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:09:54,473 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:09:54,474 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:09:54,479 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:09:54,487 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:09:54,489 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:09:54,490 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:09:54,493 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:09:54,495 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:09:54,504 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:09:54,504 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:09:54,505 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:09:54,507 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:09:54,507 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:09:54,509 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:09:54,510 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:09:54,511 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:09:54,513 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:09:54,514 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:09:54,516 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:09:54,516 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:09:54,517 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:09:54,517 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:09:54,517 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:09:54,518 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:09:54,519 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:09:54,520 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 03:09:54,564 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:09:54,565 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:09:54,565 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:09:54,566 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:09:54,573 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:09:54,573 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:09:54,573 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:09:54,573 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:09:54,574 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:09:54,574 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:09:54,575 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:09:54,575 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:09:54,575 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:09:54,576 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:09:54,576 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:09:54,576 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:09:54,576 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:09:54,576 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:09:54,577 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:09:54,577 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:09:54,578 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:09:54,578 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:09:54,578 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:09:54,578 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:09:54,578 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:09:54,579 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:09:54,580 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:09:54,580 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:09:54,581 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:09:54,581 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:09:54,581 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:09:54,582 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:09:54,582 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:09:54,582 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:09:54,582 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:09:54,582 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:09:54,583 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:09:54,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:09:54,583 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:09:54,583 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:09:54,583 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:09:54,584 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 503e46fe74670dc8b1fd2e8b2c5a408fc01c83cb421ff9aefb8796417315d291 [2021-11-23 03:09:54,893 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:09:54,914 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:09:54,917 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:09:54,918 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:09:54,919 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:09:54,920 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i [2021-11-23 03:09:54,997 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/data/de05121e6/dd458fef25e647ef88c7a9556d023b20/FLAGaf8ddb557 [2021-11-23 03:09:55,575 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:09:55,576 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i [2021-11-23 03:09:55,601 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/data/de05121e6/dd458fef25e647ef88c7a9556d023b20/FLAGaf8ddb557 [2021-11-23 03:09:55,833 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/data/de05121e6/dd458fef25e647ef88c7a9556d023b20 [2021-11-23 03:09:55,836 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:09:55,837 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:09:55,839 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:09:55,839 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:09:55,845 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:09:55,846 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:09:55" (1/1) ... [2021-11-23 03:09:55,848 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42635e3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:09:55, skipping insertion in model container [2021-11-23 03:09:55,849 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:09:55" (1/1) ... [2021-11-23 03:09:55,857 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:09:55,903 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:09:56,235 WARN L230 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_4db0a5f5-92d9-49c7-b172-3b452197cd91/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22665,22678] [2021-11-23 03:09:56,241 WARN L230 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_4db0a5f5-92d9-49c7-b172-3b452197cd91/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22735,22748] [2021-11-23 03:09:56,244 WARN L230 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_4db0a5f5-92d9-49c7-b172-3b452197cd91/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22799,22812] [2021-11-23 03:09:56,247 WARN L230 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_4db0a5f5-92d9-49c7-b172-3b452197cd91/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22894,22907] [2021-11-23 03:09:56,250 WARN L230 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_4db0a5f5-92d9-49c7-b172-3b452197cd91/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22966,22979] [2021-11-23 03:09:56,252 WARN L230 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_4db0a5f5-92d9-49c7-b172-3b452197cd91/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[23105,23118] [2021-11-23 03:09:56,253 WARN L230 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_4db0a5f5-92d9-49c7-b172-3b452197cd91/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[23179,23192] [2021-11-23 03:09:56,265 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:09:56,275 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:09:56,332 WARN L230 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_4db0a5f5-92d9-49c7-b172-3b452197cd91/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22665,22678] [2021-11-23 03:09:56,336 WARN L230 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_4db0a5f5-92d9-49c7-b172-3b452197cd91/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22735,22748] [2021-11-23 03:09:56,338 WARN L230 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_4db0a5f5-92d9-49c7-b172-3b452197cd91/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22799,22812] [2021-11-23 03:09:56,339 WARN L230 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_4db0a5f5-92d9-49c7-b172-3b452197cd91/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22894,22907] [2021-11-23 03:09:56,340 WARN L230 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_4db0a5f5-92d9-49c7-b172-3b452197cd91/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22966,22979] [2021-11-23 03:09:56,342 WARN L230 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_4db0a5f5-92d9-49c7-b172-3b452197cd91/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[23105,23118] [2021-11-23 03:09:56,348 WARN L230 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_4db0a5f5-92d9-49c7-b172-3b452197cd91/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[23179,23192] [2021-11-23 03:09:56,352 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:09:56,380 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:09:56,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:09:56 WrapperNode [2021-11-23 03:09:56,381 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:09:56,382 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:09:56,382 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:09:56,382 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:09:56,390 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:09:56" (1/1) ... [2021-11-23 03:09:56,417 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:09:56" (1/1) ... [2021-11-23 03:09:56,457 INFO L137 Inliner]: procedures = 119, calls = 43, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 156 [2021-11-23 03:09:56,458 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:09:56,459 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:09:56,459 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:09:56,459 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:09:56,467 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:09:56" (1/1) ... [2021-11-23 03:09:56,468 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:09:56" (1/1) ... [2021-11-23 03:09:56,479 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:09:56" (1/1) ... [2021-11-23 03:09:56,479 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:09:56" (1/1) ... [2021-11-23 03:09:56,488 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:09:56" (1/1) ... [2021-11-23 03:09:56,494 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:09:56" (1/1) ... [2021-11-23 03:09:56,496 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:09:56" (1/1) ... [2021-11-23 03:09:56,499 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:09:56,500 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:09:56,500 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:09:56,500 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:09:56,501 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:09:56" (1/1) ... [2021-11-23 03:09:56,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:09:56,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:09:56,542 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:09:56,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:09:56,594 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 03:09:56,595 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 03:09:56,595 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 03:09:56,595 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:09:56,595 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 03:09:56,595 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 03:09:56,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 03:09:56,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:09:56,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:09:56,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:09:56,774 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:09:56,776 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:09:57,135 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:09:57,229 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:09:57,229 INFO L301 CfgBuilder]: Removed 17 assume(true) statements. [2021-11-23 03:09:57,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:09:57 BoogieIcfgContainer [2021-11-23 03:09:57,232 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:09:57,236 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:09:57,237 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:09:57,241 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:09:57,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:09:55" (1/3) ... [2021-11-23 03:09:57,243 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52b3089e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:09:57, skipping insertion in model container [2021-11-23 03:09:57,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:09:56" (2/3) ... [2021-11-23 03:09:57,244 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52b3089e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:09:57, skipping insertion in model container [2021-11-23 03:09:57,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:09:57" (3/3) ... [2021-11-23 03:09:57,245 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-rb-sentinel-1.i [2021-11-23 03:09:57,254 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:09:57,255 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-11-23 03:09:57,319 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:09:57,327 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 03:09:57,328 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-11-23 03:09:57,355 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 33 states have (on average 2.0) internal successors, (66), 40 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:09:57,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-23 03:09:57,363 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:09:57,364 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-23 03:09:57,365 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 03:09:57,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:09:57,371 INFO L85 PathProgramCache]: Analyzing trace with hash 203576989, now seen corresponding path program 1 times [2021-11-23 03:09:57,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:09:57,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076630861] [2021-11-23 03:09:57,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:09:57,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:09:57,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:09:57,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:09:57,568 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:09:57,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076630861] [2021-11-23 03:09:57,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076630861] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:09:57,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:09:57,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:09:57,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721211353] [2021-11-23 03:09:57,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:09:57,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 03:09:57,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:09:57,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 03:09:57,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 03:09:57,606 INFO L87 Difference]: Start difference. First operand has 41 states, 33 states have (on average 2.0) internal successors, (66), 40 states have internal predecessors, (66), 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) [2021-11-23 03:09:57,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:09:57,743 INFO L93 Difference]: Finished difference Result 81 states and 131 transitions. [2021-11-23 03:09:57,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 03:09:57,745 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 [2021-11-23 03:09:57,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:09:57,753 INFO L225 Difference]: With dead ends: 81 [2021-11-23 03:09:57,754 INFO L226 Difference]: Without dead ends: 39 [2021-11-23 03:09:57,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 03:09:57,761 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:09:57,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:09:57,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-23 03:09:57,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-11-23 03:09:57,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 32 states have (on average 1.28125) internal successors, (41), 38 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:09:57,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2021-11-23 03:09:57,795 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 5 [2021-11-23 03:09:57,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:09:57,796 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2021-11-23 03:09:57,796 INFO L471 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) [2021-11-23 03:09:57,796 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2021-11-23 03:09:57,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 03:09:57,797 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:09:57,797 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 03:09:57,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:09:57,798 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 03:09:57,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:09:57,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1958512255, now seen corresponding path program 1 times [2021-11-23 03:09:57,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:09:57,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028737944] [2021-11-23 03:09:57,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:09:57,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:09:57,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:09:58,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:09:58,014 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:09:58,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028737944] [2021-11-23 03:09:58,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028737944] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:09:58,018 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:09:58,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:09:58,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322424285] [2021-11-23 03:09:58,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:09:58,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:09:58,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:09:58,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:09:58,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:09:58,025 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 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) [2021-11-23 03:09:58,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:09:58,457 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2021-11-23 03:09:58,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:09:58,458 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 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 [2021-11-23 03:09:58,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:09:58,459 INFO L225 Difference]: With dead ends: 39 [2021-11-23 03:09:58,460 INFO L226 Difference]: Without dead ends: 37 [2021-11-23 03:09:58,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:09:58,462 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 13 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:09:58,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 77 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 03:09:58,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-23 03:09:58,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-11-23 03:09:58,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 36 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:09:58,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2021-11-23 03:09:58,468 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 6 [2021-11-23 03:09:58,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:09:58,469 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2021-11-23 03:09:58,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 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) [2021-11-23 03:09:58,469 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2021-11-23 03:09:58,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 03:09:58,470 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:09:58,470 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 03:09:58,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 03:09:58,471 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 03:09:58,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:09:58,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1953024847, now seen corresponding path program 1 times [2021-11-23 03:09:58,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:09:58,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240215632] [2021-11-23 03:09:58,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:09:58,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:09:58,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:09:58,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:09:58,538 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:09:58,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240215632] [2021-11-23 03:09:58,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240215632] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:09:58,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:09:58,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:09:58,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264191698] [2021-11-23 03:09:58,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:09:58,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:09:58,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:09:58,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:09:58,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:09:58,542 INFO L87 Difference]: Start difference. First operand 37 states and 39 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) [2021-11-23 03:09:58,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:09:58,862 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2021-11-23 03:09:58,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:09:58,863 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 [2021-11-23 03:09:58,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:09:58,865 INFO L225 Difference]: With dead ends: 43 [2021-11-23 03:09:58,865 INFO L226 Difference]: Without dead ends: 41 [2021-11-23 03:09:58,866 INFO L932 BasicCegarLoop]: 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 [2021-11-23 03:09:58,869 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 47 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:09:58,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 38 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:09:58,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-23 03:09:58,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2021-11-23 03:09:58,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 34 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:09:58,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2021-11-23 03:09:58,887 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 6 [2021-11-23 03:09:58,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:09:58,888 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2021-11-23 03:09:58,888 INFO L471 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) [2021-11-23 03:09:58,888 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2021-11-23 03:09:58,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 03:09:58,889 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:09:58,890 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:09:58,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 03:09:58,891 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 03:09:58,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:09:58,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1088186010, now seen corresponding path program 1 times [2021-11-23 03:09:58,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:09:58,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041850399] [2021-11-23 03:09:58,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:09:58,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:09:58,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:09:59,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:09:59,031 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:09:59,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041850399] [2021-11-23 03:09:59,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041850399] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:09:59,032 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:09:59,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:09:59,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615826466] [2021-11-23 03:09:59,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:09:59,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:09:59,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:09:59,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:09:59,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:09:59,034 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:09:59,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:09:59,264 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2021-11-23 03:09:59,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:09:59,265 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 9 [2021-11-23 03:09:59,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:09:59,266 INFO L225 Difference]: With dead ends: 35 [2021-11-23 03:09:59,266 INFO L226 Difference]: Without dead ends: 33 [2021-11-23 03:09:59,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:09:59,268 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 8 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:09:59,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 64 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:09:59,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-23 03:09:59,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-11-23 03:09:59,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 29 states have (on average 1.206896551724138) internal successors, (35), 32 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:09:59,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-11-23 03:09:59,274 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 9 [2021-11-23 03:09:59,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:09:59,274 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-11-23 03:09:59,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:09:59,275 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-11-23 03:09:59,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 03:09:59,275 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:09:59,276 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:09:59,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 03:09:59,276 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 03:09:59,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:09:59,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1354743889, now seen corresponding path program 1 times [2021-11-23 03:09:59,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:09:59,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331338675] [2021-11-23 03:09:59,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:09:59,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:09:59,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:09:59,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:09:59,337 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:09:59,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331338675] [2021-11-23 03:09:59,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331338675] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:09:59,337 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:09:59,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:09:59,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492396519] [2021-11-23 03:09:59,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:09:59,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:09:59,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:09:59,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:09:59,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:09:59,340 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:09:59,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:09:59,940 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2021-11-23 03:09:59,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:09:59,944 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 9 [2021-11-23 03:09:59,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:09:59,945 INFO L225 Difference]: With dead ends: 58 [2021-11-23 03:09:59,946 INFO L226 Difference]: Without dead ends: 56 [2021-11-23 03:09:59,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:09:59,947 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 37 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:09:59,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 78 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 03:09:59,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-23 03:09:59,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 40. [2021-11-23 03:09:59,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 39 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:09:59,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2021-11-23 03:09:59,955 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 9 [2021-11-23 03:09:59,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:09:59,956 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2021-11-23 03:09:59,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:09:59,956 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2021-11-23 03:09:59,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 03:09:59,957 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:09:59,957 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:09:59,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 03:09:59,958 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 03:09:59,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:09:59,958 INFO L85 PathProgramCache]: Analyzing trace with hash -2069574902, now seen corresponding path program 1 times [2021-11-23 03:09:59,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:09:59,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550561198] [2021-11-23 03:09:59,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:09:59,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:09:59,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:10:00,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:10:00,103 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:10:00,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550561198] [2021-11-23 03:10:00,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550561198] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:10:00,104 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:10:00,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:10:00,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596720239] [2021-11-23 03:10:00,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:10:00,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:10:00,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:10:00,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:10:00,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:10:00,106 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 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) [2021-11-23 03:10:00,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:10:00,283 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2021-11-23 03:10:00,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:10:00,285 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 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 [2021-11-23 03:10:00,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:10:00,286 INFO L225 Difference]: With dead ends: 40 [2021-11-23 03:10:00,286 INFO L226 Difference]: Without dead ends: 38 [2021-11-23 03:10:00,286 INFO L932 BasicCegarLoop]: 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 [2021-11-23 03:10:00,287 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 13 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:10:00,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 51 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:10:00,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-23 03:10:00,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-11-23 03:10:00,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 37 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:10:00,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-11-23 03:10:00,293 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 11 [2021-11-23 03:10:00,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:10:00,294 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-11-23 03:10:00,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 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) [2021-11-23 03:10:00,294 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-11-23 03:10:00,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 03:10:00,295 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:10:00,295 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:10:00,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 03:10:00,295 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 03:10:00,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:10:00,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1743206058, now seen corresponding path program 1 times [2021-11-23 03:10:00,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:10:00,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004289382] [2021-11-23 03:10:00,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:10:00,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:10:00,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:10:00,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:10:00,387 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:10:00,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004289382] [2021-11-23 03:10:00,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004289382] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:10:00,387 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:10:00,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 03:10:00,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806073828] [2021-11-23 03:10:00,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:10:00,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:10:00,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:10:00,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:10:00,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:10:00,390 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:10:00,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:10:00,640 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2021-11-23 03:10:00,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:10:00,641 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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 13 [2021-11-23 03:10:00,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:10:00,641 INFO L225 Difference]: With dead ends: 53 [2021-11-23 03:10:00,642 INFO L226 Difference]: Without dead ends: 41 [2021-11-23 03:10:00,642 INFO L932 BasicCegarLoop]: 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 [2021-11-23 03:10:00,643 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 11 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:10:00,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 70 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:10:00,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-23 03:10:00,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2021-11-23 03:10:00,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 37 states have (on average 1.162162162162162) internal successors, (43), 39 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:10:00,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2021-11-23 03:10:00,650 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 13 [2021-11-23 03:10:00,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:10:00,650 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2021-11-23 03:10:00,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:10:00,651 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2021-11-23 03:10:00,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 03:10:00,651 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:10:00,652 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:10:00,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 03:10:00,652 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 03:10:00,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:10:00,653 INFO L85 PathProgramCache]: Analyzing trace with hash -282967061, now seen corresponding path program 1 times [2021-11-23 03:10:00,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:10:00,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134508958] [2021-11-23 03:10:00,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:10:00,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:10:00,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:10:00,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:10:00,715 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:10:00,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134508958] [2021-11-23 03:10:00,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134508958] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:10:00,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275378634] [2021-11-23 03:10:00,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:10:00,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:10:00,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:10:00,723 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:10:00,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:10:00,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:10:00,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 03:10:00,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:10:00,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:00,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:00,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:00,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 27 treesize of output 17 [2021-11-23 03:10:00,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:00,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:00,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:00,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 27 treesize of output 17 [2021-11-23 03:10:01,237 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:10:01,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-11-23 03:10:01,253 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:10:01,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 03:10:01,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:10:01,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:10:01,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:10:01,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275378634] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:10:01,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [397262679] [2021-11-23 03:10:01,405 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 03:10:01,405 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:10:01,409 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:10:01,415 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:10:01,419 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:10:01,567 INFO L354 Elim1Store]: treesize reduction 60, result has 33.3 percent of original size [2021-11-23 03:10:01,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 41 [2021-11-23 03:10:01,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:01,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:01,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:01,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:01,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:01,683 INFO L354 Elim1Store]: treesize reduction 47, result has 35.6 percent of original size [2021-11-23 03:10:01,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 98 treesize of output 89 [2021-11-23 03:10:01,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:01,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:01,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:01,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:01,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:01,715 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:10:01,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 74 treesize of output 67 [2021-11-23 03:10:01,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:01,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:01,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:10:01,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:01,752 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-23 03:10:01,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 55 treesize of output 63 [2021-11-23 03:10:01,856 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-23 03:10:01,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 39 treesize of output 61 [2021-11-23 03:10:01,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:01,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:01,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:01,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:01,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:01,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:01,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 42 [2021-11-23 03:10:01,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:01,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:01,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:01,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:01,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:01,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:10:01,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 42 [2021-11-23 03:10:02,226 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:10:02,661 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '856#(and (<= 0 |#NULL.base|) (= |ULTIMATE.start_main_~null~0#1.base| |ULTIMATE.start_main_~end~0#1.base|) (= |ULTIMATE.start_main_~null~0#1.offset| |ULTIMATE.start_main_~end~0#1.offset|) (exists ((|v_ULTIMATE.start_main_~end~0#1.base_45| Int) (|v_ULTIMATE.start_main_~end~0#1.offset_46| Int)) (and (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~end~0#1.base_45|) |v_ULTIMATE.start_main_~end~0#1.offset_46|) |ULTIMATE.start_main_~end~0#1.offset|) (= |ULTIMATE.start_main_~end~0#1.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_main_~end~0#1.base_45|) |v_ULTIMATE.start_main_~end~0#1.offset_46|)))) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~null~0#1.offset|) (<= 0 |ULTIMATE.start_main_~list~0#1.offset|) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~list~0#1.offset| 0) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~null~0#1.offset| 0) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-23 03:10:02,662 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:10:02,662 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:10:02,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2021-11-23 03:10:02,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073671712] [2021-11-23 03:10:02,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:10:02,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 03:10:02,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:10:02,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 03:10:02,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-11-23 03:10:02,672 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:10:03,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:10:03,243 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2021-11-23 03:10:03,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:10:03,243 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 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 16 [2021-11-23 03:10:03,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:10:03,244 INFO L225 Difference]: With dead ends: 57 [2021-11-23 03:10:03,244 INFO L226 Difference]: Without dead ends: 35 [2021-11-23 03:10:03,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-11-23 03:10:03,245 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 20 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:10:03,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 109 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 03:10:03,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-23 03:10:03,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-11-23 03:10:03,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 32 states have (on average 1.15625) internal successors, (37), 34 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:10:03,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2021-11-23 03:10:03,250 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 16 [2021-11-23 03:10:03,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:10:03,250 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2021-11-23 03:10:03,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:10:03,251 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2021-11-23 03:10:03,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-23 03:10:03,251 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:10:03,251 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:10:03,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:10:03,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:10:03,465 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 03:10:03,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:10:03,466 INFO L85 PathProgramCache]: Analyzing trace with hash -78338206, now seen corresponding path program 1 times [2021-11-23 03:10:03,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:10:03,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300291518] [2021-11-23 03:10:03,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:10:03,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:10:03,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:10:03,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:10:03,985 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:10:03,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300291518] [2021-11-23 03:10:03,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300291518] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:10:03,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506071309] [2021-11-23 03:10:03,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:10:03,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:10:03,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:10:03,989 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:10:04,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 03:10:04,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:10:04,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 03:10:04,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:10:04,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 03:10:04,089 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 03:10:04,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 03:11:10,407 WARN L227 SmtUtils]: Spent 1.10m on a formula simplification. DAG size of input: 143 DAG size of output: 58 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-23 03:11:10,408 INFO L354 Elim1Store]: treesize reduction 2835, result has 9.4 percent of original size [2021-11-23 03:11:10,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 12 case distinctions, treesize of input 3331 treesize of output 3362 [2021-11-23 03:13:28,325 WARN L227 SmtUtils]: Spent 2.30m on a formula simplification. DAG size of input: 160 DAG size of output: 67 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-23 03:13:28,326 INFO L354 Elim1Store]: treesize reduction 1006, result has 12.7 percent of original size [2021-11-23 03:13:28,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 8 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 8 new quantified variables, introduced 14 case distinctions, treesize of input 3535 treesize of output 3381 [2021-11-23 03:13:28,536 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Some non-self update cases but no top-level DER relation [2021-11-23 03:13:28,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1681165586] [2021-11-23 03:13:28,541 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-23 03:13:28,541 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:13:28,542 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:13:28,542 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:13:28,542 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:13:28,581 FATAL L? ?]: Ignoring exception! java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@6f9f717e at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker.assertLhs(IncrementalPlicationChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker.checkPlication(IncrementalPlicationChecker.java:135) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.ArrayIndexEqualityManager.(ArrayIndexEqualityManager.java:92) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:115) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:903) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:865) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:783) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:425) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:162) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:243) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:233) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:285) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:119) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 03:13:28,584 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:13:28,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-23 03:13:28,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284049934] [2021-11-23 03:13:28,585 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-23 03:13:28,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 03:13:28,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:13:28,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 03:13:28,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-23 03:13:28,587 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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) [2021-11-23 03:13:28,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 03:13:28,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-23 03:13:28,590 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:13:28,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:13:28,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 03:13:28,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:13:28,817 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@6f9f717e at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:455) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.chooseFalseSuccessor2(BasicAbstractInterpolantAutomaton.java:107) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:73) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 03:13:28,819 INFO L158 Benchmark]: Toolchain (without parser) took 212981.75ms. Allocated memory was 127.9MB in the beginning and 155.2MB in the end (delta: 27.3MB). Free memory was 91.9MB in the beginning and 118.4MB in the end (delta: -26.6MB). Peak memory consumption was 753.7kB. Max. memory is 16.1GB. [2021-11-23 03:13:28,819 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 86.0MB. Free memory was 55.7MB in the beginning and 55.6MB in the end (delta: 27.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:13:28,819 INFO L158 Benchmark]: CACSL2BoogieTranslator took 541.93ms. Allocated memory is still 127.9MB. Free memory was 91.6MB in the beginning and 95.9MB in the end (delta: -4.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 03:13:28,820 INFO L158 Benchmark]: Boogie Procedure Inliner took 76.45ms. Allocated memory is still 127.9MB. Free memory was 95.9MB in the beginning and 93.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 03:13:28,820 INFO L158 Benchmark]: Boogie Preprocessor took 40.32ms. Allocated memory is still 127.9MB. Free memory was 93.8MB in the beginning and 91.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 03:13:28,820 INFO L158 Benchmark]: RCFGBuilder took 732.71ms. Allocated memory is still 127.9MB. Free memory was 91.7MB in the beginning and 68.1MB in the end (delta: 23.6MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2021-11-23 03:13:28,820 INFO L158 Benchmark]: TraceAbstraction took 211582.35ms. Allocated memory was 127.9MB in the beginning and 155.2MB in the end (delta: 27.3MB). Free memory was 67.7MB in the beginning and 118.4MB in the end (delta: -50.7MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:13:28,822 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 86.0MB. Free memory was 55.7MB in the beginning and 55.6MB in the end (delta: 27.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 541.93ms. Allocated memory is still 127.9MB. Free memory was 91.6MB in the beginning and 95.9MB in the end (delta: -4.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 76.45ms. Allocated memory is still 127.9MB. Free memory was 95.9MB in the beginning and 93.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 40.32ms. Allocated memory is still 127.9MB. Free memory was 93.8MB in the beginning and 91.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 732.71ms. Allocated memory is still 127.9MB. Free memory was 91.7MB in the beginning and 68.1MB in the end (delta: 23.6MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * TraceAbstraction took 211582.35ms. Allocated memory was 127.9MB in the beginning and 155.2MB in the end (delta: 27.3MB). Free memory was 67.7MB in the beginning and 118.4MB in the end (delta: -50.7MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@6f9f717e de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@6f9f717e: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 03:13:28,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V --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 503e46fe74670dc8b1fd2e8b2c5a408fc01c83cb421ff9aefb8796417315d291 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:13:31,222 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:13:31,224 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:13:31,256 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:13:31,257 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:13:31,258 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:13:31,260 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:13:31,262 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:13:31,264 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:13:31,266 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:13:31,267 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:13:31,268 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:13:31,269 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:13:31,270 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:13:31,272 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:13:31,273 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:13:31,274 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:13:31,275 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:13:31,281 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:13:31,284 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:13:31,289 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:13:31,291 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:13:31,293 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:13:31,295 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:13:31,303 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:13:31,304 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:13:31,308 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:13:31,310 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:13:31,311 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:13:31,312 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:13:31,313 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:13:31,315 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:13:31,317 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:13:31,318 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:13:31,330 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:13:31,330 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:13:31,331 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:13:31,331 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:13:31,332 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:13:31,333 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:13:31,334 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:13:31,334 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 03:13:31,361 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:13:31,361 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:13:31,362 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:13:31,362 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:13:31,363 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:13:31,363 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:13:31,364 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:13:31,364 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:13:31,364 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:13:31,364 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:13:31,364 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:13:31,365 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:13:31,366 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:13:31,366 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:13:31,366 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:13:31,366 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:13:31,366 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:13:31,367 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:13:31,367 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:13:31,367 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 03:13:31,367 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 03:13:31,367 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 03:13:31,368 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:13:31,368 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:13:31,368 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:13:31,368 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:13:31,369 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:13:31,369 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 03:13:31,369 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:13:31,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:13:31,370 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:13:31,370 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:13:31,370 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:13:31,370 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 03:13:31,370 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 03:13:31,371 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:13:31,371 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:13:31,371 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:13:31,371 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 503e46fe74670dc8b1fd2e8b2c5a408fc01c83cb421ff9aefb8796417315d291 [2021-11-23 03:13:31,710 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:13:31,741 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:13:31,744 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:13:31,745 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:13:31,749 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:13:31,751 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i [2021-11-23 03:13:31,827 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/data/c801d9f06/b432a6a72a3e491ebf6345e7ed8ff613/FLAGe6e06a074 [2021-11-23 03:13:32,400 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:13:32,401 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i [2021-11-23 03:13:32,432 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/data/c801d9f06/b432a6a72a3e491ebf6345e7ed8ff613/FLAGe6e06a074 [2021-11-23 03:13:32,688 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/data/c801d9f06/b432a6a72a3e491ebf6345e7ed8ff613 [2021-11-23 03:13:32,691 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:13:32,692 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:13:32,693 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:13:32,694 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:13:32,697 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:13:32,698 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:13:32" (1/1) ... [2021-11-23 03:13:32,699 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ef2b979 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:32, skipping insertion in model container [2021-11-23 03:13:32,699 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:13:32" (1/1) ... [2021-11-23 03:13:32,707 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:13:32,753 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:13:33,089 WARN L230 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_4db0a5f5-92d9-49c7-b172-3b452197cd91/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22665,22678] [2021-11-23 03:13:33,094 WARN L230 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_4db0a5f5-92d9-49c7-b172-3b452197cd91/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22735,22748] [2021-11-23 03:13:33,095 WARN L230 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_4db0a5f5-92d9-49c7-b172-3b452197cd91/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22799,22812] [2021-11-23 03:13:33,098 WARN L230 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_4db0a5f5-92d9-49c7-b172-3b452197cd91/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22894,22907] [2021-11-23 03:13:33,099 WARN L230 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_4db0a5f5-92d9-49c7-b172-3b452197cd91/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22966,22979] [2021-11-23 03:13:33,102 WARN L230 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_4db0a5f5-92d9-49c7-b172-3b452197cd91/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[23105,23118] [2021-11-23 03:13:33,104 WARN L230 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_4db0a5f5-92d9-49c7-b172-3b452197cd91/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[23179,23192] [2021-11-23 03:13:33,115 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:13:33,130 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:13:33,187 WARN L230 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_4db0a5f5-92d9-49c7-b172-3b452197cd91/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22665,22678] [2021-11-23 03:13:33,189 WARN L230 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_4db0a5f5-92d9-49c7-b172-3b452197cd91/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22735,22748] [2021-11-23 03:13:33,197 WARN L230 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_4db0a5f5-92d9-49c7-b172-3b452197cd91/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22799,22812] [2021-11-23 03:13:33,198 WARN L230 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_4db0a5f5-92d9-49c7-b172-3b452197cd91/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22894,22907] [2021-11-23 03:13:33,200 WARN L230 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_4db0a5f5-92d9-49c7-b172-3b452197cd91/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22966,22979] [2021-11-23 03:13:33,206 WARN L230 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_4db0a5f5-92d9-49c7-b172-3b452197cd91/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[23105,23118] [2021-11-23 03:13:33,208 WARN L230 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_4db0a5f5-92d9-49c7-b172-3b452197cd91/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[23179,23192] [2021-11-23 03:13:33,219 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:13:33,258 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:13:33,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:33 WrapperNode [2021-11-23 03:13:33,262 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:13:33,263 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:13:33,263 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:13:33,264 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:13:33,273 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:33" (1/1) ... [2021-11-23 03:13:33,315 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:33" (1/1) ... [2021-11-23 03:13:33,350 INFO L137 Inliner]: procedures = 122, calls = 43, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 155 [2021-11-23 03:13:33,350 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:13:33,352 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:13:33,352 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:13:33,353 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:13:33,360 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:33" (1/1) ... [2021-11-23 03:13:33,361 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:33" (1/1) ... [2021-11-23 03:13:33,379 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:33" (1/1) ... [2021-11-23 03:13:33,380 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:33" (1/1) ... [2021-11-23 03:13:33,390 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:33" (1/1) ... [2021-11-23 03:13:33,407 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:33" (1/1) ... [2021-11-23 03:13:33,417 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:33" (1/1) ... [2021-11-23 03:13:33,421 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:13:33,427 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:13:33,428 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:13:33,428 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:13:33,429 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:33" (1/1) ... [2021-11-23 03:13:33,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:13:33,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:13:33,467 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:13:33,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:13:33,515 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-23 03:13:33,516 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 03:13:33,516 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:13:33,516 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 03:13:33,516 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 03:13:33,516 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 03:13:33,516 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-23 03:13:33,516 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 03:13:33,516 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:13:33,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:13:33,702 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:13:33,704 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:13:34,986 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:13:34,993 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:13:34,994 INFO L301 CfgBuilder]: Removed 17 assume(true) statements. [2021-11-23 03:13:34,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:13:34 BoogieIcfgContainer [2021-11-23 03:13:34,996 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:13:34,998 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:13:34,998 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:13:35,001 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:13:35,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:13:32" (1/3) ... [2021-11-23 03:13:35,002 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@255fb690 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:13:35, skipping insertion in model container [2021-11-23 03:13:35,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:33" (2/3) ... [2021-11-23 03:13:35,003 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@255fb690 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:13:35, skipping insertion in model container [2021-11-23 03:13:35,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:13:34" (3/3) ... [2021-11-23 03:13:35,004 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-rb-sentinel-1.i [2021-11-23 03:13:35,010 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:13:35,011 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-11-23 03:13:35,057 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:13:35,064 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 03:13:35,065 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-11-23 03:13:35,080 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 45 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:35,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 03:13:35,085 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:13:35,086 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 03:13:35,087 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 03:13:35,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:13:35,093 INFO L85 PathProgramCache]: Analyzing trace with hash 891569350, now seen corresponding path program 1 times [2021-11-23 03:13:35,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:13:35,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1448527831] [2021-11-23 03:13:35,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:13:35,106 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:13:35,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:13:35,111 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:13:35,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 03:13:35,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:13:35,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-23 03:13:35,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:13:35,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:13:35,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:13:35,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:13:35,309 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:13:35,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1448527831] [2021-11-23 03:13:35,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1448527831] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:13:35,311 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:13:35,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-23 03:13:35,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601758119] [2021-11-23 03:13:35,313 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:13:35,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 03:13:35,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:13:35,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 03:13:35,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 03:13:35,379 INFO L87 Difference]: Start difference. First operand has 46 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 45 states have internal predecessors, (75), 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 3.0) internal successors, (6), 2 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) [2021-11-23 03:13:35,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:13:35,399 INFO L93 Difference]: Finished difference Result 90 states and 148 transitions. [2021-11-23 03:13:35,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 03:13:35,401 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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 [2021-11-23 03:13:35,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:13:35,415 INFO L225 Difference]: With dead ends: 90 [2021-11-23 03:13:35,416 INFO L226 Difference]: Without dead ends: 40 [2021-11-23 03:13:35,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 03:13:35,422 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:13:35,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:13:35,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-23 03:13:35,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-11-23 03:13:35,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 33 states have (on average 1.303030303030303) internal successors, (43), 39 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:35,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2021-11-23 03:13:35,475 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 6 [2021-11-23 03:13:35,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:13:35,476 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2021-11-23 03:13:35,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2021-11-23 03:13:35,477 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2021-11-23 03:13:35,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 03:13:35,477 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:13:35,477 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 03:13:35,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:13:35,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:13:35,690 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 03:13:35,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:13:35,691 INFO L85 PathProgramCache]: Analyzing trace with hash 889692517, now seen corresponding path program 1 times [2021-11-23 03:13:35,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:13:35,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1897972885] [2021-11-23 03:13:35,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:13:35,693 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:13:35,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:13:35,699 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:13:35,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 03:13:35,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:13:35,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:13:35,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:13:35,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 11 treesize of output 9 [2021-11-23 03:13:35,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:13:35,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:13:35,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:13:35,891 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:13:35,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1897972885] [2021-11-23 03:13:35,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1897972885] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:13:35,892 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:13:35,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-23 03:13:35,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999443123] [2021-11-23 03:13:35,893 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:13:35,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:13:35,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:13:35,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:13:35,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:13:35,896 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 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) [2021-11-23 03:13:36,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:13:36,821 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2021-11-23 03:13:36,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:13:36,822 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 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 [2021-11-23 03:13:36,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:13:36,823 INFO L225 Difference]: With dead ends: 45 [2021-11-23 03:13:36,823 INFO L226 Difference]: Without dead ends: 43 [2021-11-23 03:13:36,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:13:36,825 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 50 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 03:13:36,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 45 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-23 03:13:36,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-23 03:13:36,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2021-11-23 03:13:36,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 32 states have (on average 1.28125) internal successors, (41), 37 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:36,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-11-23 03:13:36,833 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 6 [2021-11-23 03:13:36,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:13:36,834 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-11-23 03:13:36,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 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) [2021-11-23 03:13:36,834 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-11-23 03:13:36,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 03:13:36,835 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:13:36,835 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:13:36,844 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-23 03:13:37,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:13:37,044 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 03:13:37,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:13:37,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1810723981, now seen corresponding path program 1 times [2021-11-23 03:13:37,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:13:37,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1185333158] [2021-11-23 03:13:37,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:13:37,047 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:13:37,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:13:37,048 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:13:37,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 03:13:37,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:13:37,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:13:37,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:13:37,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 03:13:37,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-23 03:13:37,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:13:37,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:13:37,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:13:37,217 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:13:37,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1185333158] [2021-11-23 03:13:37,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1185333158] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:13:37,217 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:13:37,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-23 03:13:37,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615968188] [2021-11-23 03:13:37,218 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:13:37,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:13:37,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:13:37,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:13:37,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:13:37,235 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:37,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:13:37,519 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2021-11-23 03:13:37,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:13:37,520 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-23 03:13:37,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:13:37,521 INFO L225 Difference]: With dead ends: 38 [2021-11-23 03:13:37,521 INFO L226 Difference]: Without dead ends: 36 [2021-11-23 03:13:37,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:13:37,523 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 12 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:13:37,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 77 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:13:37,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-23 03:13:37,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-11-23 03:13:37,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 35 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:37,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2021-11-23 03:13:37,530 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 7 [2021-11-23 03:13:37,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:13:37,531 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2021-11-23 03:13:37,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:37,531 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2021-11-23 03:13:37,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 03:13:37,532 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:13:37,532 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:13:37,549 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-23 03:13:37,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:13:37,749 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 03:13:37,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:13:37,750 INFO L85 PathProgramCache]: Analyzing trace with hash 590587384, now seen corresponding path program 1 times [2021-11-23 03:13:37,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:13:37,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1814781837] [2021-11-23 03:13:37,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:13:37,752 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:13:37,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:13:37,753 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:13:37,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 03:13:37,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:13:37,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:13:37,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:13:37,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 03:13:37,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-23 03:13:37,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:13:37,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:13:37,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:13:37,965 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:13:37,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1814781837] [2021-11-23 03:13:37,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1814781837] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:13:37,966 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:13:37,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-23 03:13:37,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133342125] [2021-11-23 03:13:37,966 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:13:37,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:13:37,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:13:37,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:13:37,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:13:37,968 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:38,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:13:38,526 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2021-11-23 03:13:38,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:13:38,527 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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 9 [2021-11-23 03:13:38,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:13:38,528 INFO L225 Difference]: With dead ends: 60 [2021-11-23 03:13:38,529 INFO L226 Difference]: Without dead ends: 58 [2021-11-23 03:13:38,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:13:38,530 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 37 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:13:38,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 88 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 03:13:38,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-23 03:13:38,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 42. [2021-11-23 03:13:38,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 41 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:38,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2021-11-23 03:13:38,539 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 9 [2021-11-23 03:13:38,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:13:38,539 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2021-11-23 03:13:38,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:38,540 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2021-11-23 03:13:38,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 03:13:38,540 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:13:38,541 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:13:38,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 03:13:38,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:13:38,757 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 03:13:38,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:13:38,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1507179337, now seen corresponding path program 1 times [2021-11-23 03:13:38,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:13:38,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2002780972] [2021-11-23 03:13:38,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:13:38,758 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:13:38,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:13:38,759 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:13:38,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 03:13:38,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:13:38,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 03:13:38,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:13:40,112 INFO L354 Elim1Store]: treesize reduction 163, result has 25.6 percent of original size [2021-11-23 03:13:40,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 141 treesize of output 126 [2021-11-23 03:13:40,894 INFO L354 Elim1Store]: treesize reduction 163, result has 25.6 percent of original size [2021-11-23 03:13:40,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 126 treesize of output 111 [2021-11-23 03:13:44,375 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:13:44,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 135 treesize of output 142 [2021-11-23 03:13:44,446 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:13:44,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 142 treesize of output 141 [2021-11-23 03:13:47,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:13:47,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:13:47,521 INFO L354 Elim1Store]: treesize reduction 235, result has 0.4 percent of original size [2021-11-23 03:13:47,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 158 treesize of output 1 [2021-11-23 03:13:47,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:13:47,526 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:13:47,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2002780972] [2021-11-23 03:13:47,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2002780972] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:13:47,527 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:13:47,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-23 03:13:47,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915476654] [2021-11-23 03:13:47,527 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:13:47,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 03:13:47,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:13:47,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 03:13:47,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:13:47,529 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:48,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:13:48,834 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2021-11-23 03:13:48,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 03:13:48,835 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 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 10 [2021-11-23 03:13:48,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:13:48,836 INFO L225 Difference]: With dead ends: 75 [2021-11-23 03:13:48,836 INFO L226 Difference]: Without dead ends: 73 [2021-11-23 03:13:48,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:13:48,838 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 32 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:13:48,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 91 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 43 Invalid, 0 Unknown, 5 Unchecked, 1.3s Time] [2021-11-23 03:13:48,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-23 03:13:48,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 40. [2021-11-23 03:13:48,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 39 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:48,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2021-11-23 03:13:48,846 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 10 [2021-11-23 03:13:48,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:13:48,847 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2021-11-23 03:13:48,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:48,847 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2021-11-23 03:13:48,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 03:13:48,848 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:13:48,848 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:13:48,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 03:13:49,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:13:49,057 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 03:13:49,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:13:49,058 INFO L85 PathProgramCache]: Analyzing trace with hash -995236357, now seen corresponding path program 1 times [2021-11-23 03:13:49,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:13:49,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [28465038] [2021-11-23 03:13:49,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:13:49,059 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:13:49,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:13:49,059 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:13:49,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 03:13:49,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:13:49,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 03:13:49,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:13:49,249 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-23 03:13:49,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 20 treesize of output 22 [2021-11-23 03:13:49,354 INFO L354 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2021-11-23 03:13:49,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 58 treesize of output 75 [2021-11-23 03:13:49,553 INFO L354 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2021-11-23 03:13:49,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 93 treesize of output 97 [2021-11-23 03:13:49,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:13:49,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:13:51,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:13:51,735 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:13:51,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [28465038] [2021-11-23 03:13:51,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [28465038] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:13:51,736 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:13:51,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-23 03:13:51,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112144469] [2021-11-23 03:13:51,736 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:13:51,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 03:13:51,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:13:51,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 03:13:51,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=22, Unknown=1, NotChecked=0, Total=42 [2021-11-23 03:13:51,737 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 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) [2021-11-23 03:13:52,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:13:52,008 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2021-11-23 03:13:52,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:13:52,009 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 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 12 [2021-11-23 03:13:52,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:13:52,010 INFO L225 Difference]: With dead ends: 66 [2021-11-23 03:13:52,010 INFO L226 Difference]: Without dead ends: 64 [2021-11-23 03:13:52,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=19, Invalid=22, Unknown=1, NotChecked=0, Total=42 [2021-11-23 03:13:52,011 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 42 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:13:52,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 89 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 17 Unchecked, 0.3s Time] [2021-11-23 03:13:52,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-23 03:13:52,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 48. [2021-11-23 03:13:52,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 47 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) [2021-11-23 03:13:52,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2021-11-23 03:13:52,017 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 12 [2021-11-23 03:13:52,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:13:52,018 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2021-11-23 03:13:52,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 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) [2021-11-23 03:13:52,018 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2021-11-23 03:13:52,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 03:13:52,019 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:13:52,019 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:13:52,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 03:13:52,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:13:52,220 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 03:13:52,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:13:52,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1675294727, now seen corresponding path program 1 times [2021-11-23 03:13:52,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:13:52,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [625980593] [2021-11-23 03:13:52,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:13:52,221 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:13:52,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:13:52,222 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:13:52,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 03:13:52,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:13:52,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:13:52,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:13:52,359 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-23 03:13:52,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 9 treesize of output 14 [2021-11-23 03:13:52,422 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-23 03:13:52,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 48 [2021-11-23 03:13:52,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:13:52,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:13:52,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:13:52,563 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:13:52,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [625980593] [2021-11-23 03:13:52,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [625980593] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:13:52,563 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:13:52,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-23 03:13:52,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981013087] [2021-11-23 03:13:52,563 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:13:52,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:13:52,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:13:52,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:13:52,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:13:52,565 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:53,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:13:53,551 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2021-11-23 03:13:53,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:13:53,552 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-23 03:13:53,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:13:53,553 INFO L225 Difference]: With dead ends: 48 [2021-11-23 03:13:53,553 INFO L226 Difference]: Without dead ends: 46 [2021-11-23 03:13:53,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:13:53,554 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 33 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:13:53,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 48 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-23 03:13:53,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-23 03:13:53,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 38. [2021-11-23 03:13:53,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 35 states have (on average 1.2) internal successors, (42), 37 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) [2021-11-23 03:13:53,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-11-23 03:13:53,560 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 12 [2021-11-23 03:13:53,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:13:53,560 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-11-23 03:13:53,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:53,560 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-11-23 03:13:53,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 03:13:53,561 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:13:53,561 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:13:53,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 03:13:53,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:13:53,773 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 03:13:53,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:13:53,774 INFO L85 PathProgramCache]: Analyzing trace with hash 2079156959, now seen corresponding path program 1 times [2021-11-23 03:13:53,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:13:53,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [780420229] [2021-11-23 03:13:53,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:13:53,775 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:13:53,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:13:53,775 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:13:53,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 03:13:53,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:13:53,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:13:53,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:13:53,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 03:13:53,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-23 03:13:53,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:13:53,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:13:54,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:13:54,018 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:13:54,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [780420229] [2021-11-23 03:13:54,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [780420229] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:13:54,018 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:13:54,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-23 03:13:54,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648350593] [2021-11-23 03:13:54,019 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:13:54,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 03:13:54,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:13:54,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 03:13:54,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:13:54,020 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:55,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:13:55,090 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2021-11-23 03:13:55,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:13:55,091 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 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 13 [2021-11-23 03:13:55,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:13:55,092 INFO L225 Difference]: With dead ends: 66 [2021-11-23 03:13:55,092 INFO L226 Difference]: Without dead ends: 54 [2021-11-23 03:13:55,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-23 03:13:55,093 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 30 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:13:55,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 138 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-23 03:13:55,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-23 03:13:55,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2021-11-23 03:13:55,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 40 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:55,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2021-11-23 03:13:55,099 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 13 [2021-11-23 03:13:55,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:13:55,100 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2021-11-23 03:13:55,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:55,100 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2021-11-23 03:13:55,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 03:13:55,101 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:13:55,101 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:13:55,129 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-23 03:13:55,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:13:55,317 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 03:13:55,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:13:55,317 INFO L85 PathProgramCache]: Analyzing trace with hash -734247455, now seen corresponding path program 1 times [2021-11-23 03:13:55,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:13:55,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [764857132] [2021-11-23 03:13:55,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:13:55,318 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:13:55,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:13:55,319 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:13:55,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 03:13:55,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:13:55,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 03:13:55,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:13:55,458 INFO L354 Elim1Store]: treesize reduction 82, result has 17.2 percent of original size [2021-11-23 03:13:55,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 17 [2021-11-23 03:13:55,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:55,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:55,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:55,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 27 treesize of output 17 [2021-11-23 03:13:55,807 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 03:13:55,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 33 [2021-11-23 03:13:55,814 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 03:13:55,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 13 [2021-11-23 03:13:55,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:13:55,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:13:56,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:13:56,051 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:13:56,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [764857132] [2021-11-23 03:13:56,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [764857132] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:13:56,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1928832024] [2021-11-23 03:13:56,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:13:56,051 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 03:13:56,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 03:13:56,058 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 03:13:56,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-23 03:13:56,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:13:56,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 03:13:56,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:13:56,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:56,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:56,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:56,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 27 treesize of output 17 [2021-11-23 03:13:56,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:56,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:56,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:56,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 27 treesize of output 17 [2021-11-23 03:13:56,574 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:13:56,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-11-23 03:13:56,592 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:13:56,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 03:13:56,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:13:56,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:13:56,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:13:56,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1928832024] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:13:56,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929329992] [2021-11-23 03:13:56,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:13:56,719 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:13:56,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:13:56,725 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:13:56,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 03:13:56,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:13:56,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 03:13:56,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:13:56,822 INFO L354 Elim1Store]: treesize reduction 82, result has 17.2 percent of original size [2021-11-23 03:13:56,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 17 [2021-11-23 03:13:56,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:56,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:56,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:56,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 27 treesize of output 17 [2021-11-23 03:13:57,107 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 03:13:57,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 33 [2021-11-23 03:13:57,113 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 03:13:57,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 13 [2021-11-23 03:13:57,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:13:57,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:13:57,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:13:57,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929329992] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:13:57,241 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 03:13:57,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 12 [2021-11-23 03:13:57,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985092518] [2021-11-23 03:13:57,242 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 03:13:57,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 03:13:57,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:13:57,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 03:13:57,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:13:57,243 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:59,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:13:59,791 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2021-11-23 03:13:59,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:13:59,792 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 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 16 [2021-11-23 03:13:59,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:13:59,792 INFO L225 Difference]: With dead ends: 55 [2021-11-23 03:13:59,792 INFO L226 Difference]: Without dead ends: 33 [2021-11-23 03:13:59,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-11-23 03:13:59,794 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 25 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:13:59,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 150 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-23 03:13:59,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-23 03:13:59,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-11-23 03:13:59,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 30 states have (on average 1.2) internal successors, (36), 32 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) [2021-11-23 03:13:59,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-11-23 03:13:59,798 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 16 [2021-11-23 03:13:59,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:13:59,799 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-11-23 03:13:59,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:13:59,799 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-11-23 03:13:59,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-23 03:13:59,800 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:13:59,800 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:13:59,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-23 03:14:00,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 03:14:00,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 03:14:00,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:14:00,401 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 03:14:00,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:14:00,401 INFO L85 PathProgramCache]: Analyzing trace with hash -587248931, now seen corresponding path program 1 times [2021-11-23 03:14:00,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:14:00,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [968715217] [2021-11-23 03:14:00,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:14:00,402 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:14:00,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:14:00,403 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:14:00,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 03:14:00,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:14:00,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 03:14:00,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:14:00,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 03:14:00,570 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-23 03:14:00,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 9 treesize of output 14 [2021-11-23 03:14:00,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:00,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:00,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:00,717 INFO L354 Elim1Store]: treesize reduction 78, result has 26.4 percent of original size [2021-11-23 03:14:00,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 65 treesize of output 52 [2021-11-23 03:14:00,747 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 03:14:00,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 42 treesize of output 49 [2021-11-23 03:14:00,853 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:14:00,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [968715217] [2021-11-23 03:14:00,853 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Some non-self update cases but no top-level DER relation [2021-11-23 03:14:00,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1540891245] [2021-11-23 03:14:00,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:14:00,854 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 03:14:00,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 03:14:00,857 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 03:14:00,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-23 03:14:00,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:14:00,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 03:14:00,983 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@21ebce39 [2021-11-23 03:14:00,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148368597] [2021-11-23 03:14:00,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:14:00,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:14:00,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:14:00,984 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:14:00,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-23 03:14:01,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:14:01,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 03:14:01,058 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@21ebce39 [2021-11-23 03:14:01,058 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:14:01,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-23 03:14:01,059 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-11-23 03:14:01,059 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-11-23 03:14:01,065 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (6 of 7 remaining) [2021-11-23 03:14:01,067 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2021-11-23 03:14:01,067 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2021-11-23 03:14:01,067 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2021-11-23 03:14:01,068 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2021-11-23 03:14:01,068 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2021-11-23 03:14:01,068 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2021-11-23 03:14:01,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-23 03:14:01,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-23 03:14:01,478 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-23 03:14:01,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:14:01,673 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:14:01,676 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 03:14:01,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 03:14:01 BoogieIcfgContainer [2021-11-23 03:14:01,691 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 03:14:01,692 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 03:14:01,692 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 03:14:01,692 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 03:14:01,693 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:13:34" (3/4) ... [2021-11-23 03:14:01,696 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-23 03:14:01,696 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 03:14:01,696 INFO L158 Benchmark]: Toolchain (without parser) took 29004.18ms. Allocated memory was 67.1MB in the beginning and 94.4MB in the end (delta: 27.3MB). Free memory was 48.5MB in the beginning and 28.8MB in the end (delta: 19.7MB). Peak memory consumption was 45.3MB. Max. memory is 16.1GB. [2021-11-23 03:14:01,697 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 67.1MB. Free memory is still 48.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:14:01,697 INFO L158 Benchmark]: CACSL2BoogieTranslator took 568.73ms. Allocated memory is still 67.1MB. Free memory was 48.4MB in the beginning and 41.6MB in the end (delta: 6.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 03:14:01,697 INFO L158 Benchmark]: Boogie Procedure Inliner took 88.33ms. Allocated memory is still 67.1MB. Free memory was 41.6MB in the beginning and 39.4MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 03:14:01,698 INFO L158 Benchmark]: Boogie Preprocessor took 69.29ms. Allocated memory is still 67.1MB. Free memory was 39.4MB in the beginning and 37.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 03:14:01,698 INFO L158 Benchmark]: RCFGBuilder took 1568.67ms. Allocated memory is still 67.1MB. Free memory was 37.3MB in the beginning and 38.6MB in the end (delta: -1.3MB). Peak memory consumption was 14.9MB. Max. memory is 16.1GB. [2021-11-23 03:14:01,698 INFO L158 Benchmark]: TraceAbstraction took 26693.67ms. Allocated memory was 67.1MB in the beginning and 94.4MB in the end (delta: 27.3MB). Free memory was 38.0MB in the beginning and 28.8MB in the end (delta: 9.2MB). Peak memory consumption was 35.5MB. Max. memory is 16.1GB. [2021-11-23 03:14:01,699 INFO L158 Benchmark]: Witness Printer took 3.81ms. Allocated memory is still 94.4MB. Free memory is still 28.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:14:01,700 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 67.1MB. Free memory is still 48.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 568.73ms. Allocated memory is still 67.1MB. Free memory was 48.4MB in the beginning and 41.6MB in the end (delta: 6.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 88.33ms. Allocated memory is still 67.1MB. Free memory was 41.6MB in the beginning and 39.4MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 69.29ms. Allocated memory is still 67.1MB. Free memory was 39.4MB in the beginning and 37.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1568.67ms. Allocated memory is still 67.1MB. Free memory was 37.3MB in the beginning and 38.6MB in the end (delta: -1.3MB). Peak memory consumption was 14.9MB. Max. memory is 16.1GB. * TraceAbstraction took 26693.67ms. Allocated memory was 67.1MB in the beginning and 94.4MB in the end (delta: 27.3MB). Free memory was 38.0MB in the beginning and 28.8MB in the end (delta: 9.2MB). Peak memory consumption was 35.5MB. Max. memory is 16.1GB. * Witness Printer took 3.81ms. Allocated memory is still 94.4MB. Free memory is still 28.8MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 1042]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L998] struct TSLL* null = malloc(sizeof(struct TSLL)); [L999] null->next = ((void*)0) [L1000] null->prev = ((void*)0) [L1001] null->colour = BLACK [L1003] struct TSLL* list = malloc(sizeof(struct TSLL)); [L1004] list->next = null [L1005] list->prev = null [L1006] list->colour = BLACK [L1008] struct TSLL* end = list; [L1011] COND TRUE __VERIFIER_nondet_int() [L1014] end->next = malloc(sizeof(struct TSLL)) [L1015] EXPR end->next [L1015] end->next->prev = end [L1016] EXPR end->next [L1016] end = end->next [L1017] end->next = null [L1019] COND FALSE !(__VERIFIER_nondet_int()) [L1025] end->colour = RED [L1026] end->next = malloc(sizeof(struct TSLL)) [L1027] EXPR end->next [L1027] end->next->prev = end [L1028] EXPR end->next [L1028] end = end->next [L1029] end->next = null [L1030] end->colour = BLACK [L1032] EXPR end->colour [L1032] COND FALSE !(!(BLACK == end->colour)) [L1033] EXPR end->next [L1033] COND FALSE !(!(null == end->next)) [L1034] COND FALSE !(!(null != end)) [L1011] COND FALSE !(__VERIFIER_nondet_int()) [L1037] end = null [L1038] end = list [L1041] COND FALSE !(!(null != end)) [L1042] EXPR end->colour [L1042] COND TRUE !(BLACK == end->colour) [L1042] reach_error() - UnprovableResult [Line: 1032]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1033]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1034]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1041]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1048]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1049]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 46 locations, 7 error locations. Started 1 CEGAR loops. OverallTime: 26.6s, OverallIterations: 10, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 8.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 261 SdHoareTripleChecker+Valid, 7.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 261 mSDsluCounter, 777 SdHoareTripleChecker+Invalid, 7.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 22 IncrementalHoareTripleChecker+Unchecked, 518 mSDsCounter, 50 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 413 IncrementalHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 50 mSolverCounterUnsat, 259 mSDtfsCounter, 413 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 235 GetRequests, 186 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 3.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=6, InterpolantAutomatonStates: 47, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 91 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 13.9s InterpolantComputationTime, 142 NumberOfCodeBlocks, 142 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 224 ConstructedInterpolants, 6 QuantifiedInterpolants, 2715 SizeOfPredicates, 40 NumberOfNonLiveVariables, 690 ConjunctsInSsa, 83 ConjunctsInUnsatCore, 22 InterpolantComputations, 16 PerfectInterpolantSequences, 6/12 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-23 03:14:01,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4db0a5f5-92d9-49c7-b172-3b452197cd91/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN