./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/dll2c_insert_unequal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2c_insert_unequal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1b81f923e96224472f8219a473f794261ff02356a47c6b09b527f0fc600725a8 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:02:39,171 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:02:39,172 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:02:39,227 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:02:39,228 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:02:39,233 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:02:39,235 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:02:39,240 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:02:39,243 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:02:39,252 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:02:39,253 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:02:39,255 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:02:39,256 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:02:39,259 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:02:39,263 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:02:39,271 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:02:39,274 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:02:39,275 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:02:39,278 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:02:39,283 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:02:39,288 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:02:39,290 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:02:39,291 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:02:39,292 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:02:39,296 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:02:39,297 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:02:39,297 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:02:39,298 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:02:39,299 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:02:39,300 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:02:39,301 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:02:39,302 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:02:39,303 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:02:39,304 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:02:39,305 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:02:39,306 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:02:39,307 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:02:39,308 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:02:39,308 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:02:39,309 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:02:39,310 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:02:39,311 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-25 18:02:39,365 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:02:39,365 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:02:39,369 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:02:39,369 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:02:39,370 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:02:39,371 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:02:39,371 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:02:39,371 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:02:39,372 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:02:39,372 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:02:39,373 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:02:39,374 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:02:39,374 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:02:39,374 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:02:39,374 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:02:39,375 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:02:39,375 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:02:39,375 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:02:39,376 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-25 18:02:39,377 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-25 18:02:39,377 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:02:39,377 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:02:39,378 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 18:02:39,380 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:02:39,381 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:02:39,381 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:02:39,381 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-25 18:02:39,382 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-25 18:02:39,382 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-25 18:02:39,382 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:02:39,383 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 18:02:39,383 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:02:39,383 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:02:39,384 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:02:39,384 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:02:39,384 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:02:39,385 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:02:39,385 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:02:39,385 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:02:39,385 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:02:39,386 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:02:39,386 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:02:39,386 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_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b81f923e96224472f8219a473f794261ff02356a47c6b09b527f0fc600725a8 [2021-11-25 18:02:39,666 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:02:39,705 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:02:39,708 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:02:39,709 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:02:39,710 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:02:39,712 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/list-simple/dll2c_insert_unequal.i [2021-11-25 18:02:39,810 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/data/e3f3e08a4/6461e4ff4f65472a8f6d19181be0211c/FLAG327cfe85b [2021-11-25 18:02:40,377 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:02:40,378 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/sv-benchmarks/c/list-simple/dll2c_insert_unequal.i [2021-11-25 18:02:40,404 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/data/e3f3e08a4/6461e4ff4f65472a8f6d19181be0211c/FLAG327cfe85b [2021-11-25 18:02:40,656 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/data/e3f3e08a4/6461e4ff4f65472a8f6d19181be0211c [2021-11-25 18:02:40,659 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:02:40,661 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:02:40,663 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:02:40,663 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:02:40,667 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:02:40,668 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:02:40" (1/1) ... [2021-11-25 18:02:40,669 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2facc542 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:40, skipping insertion in model container [2021-11-25 18:02:40,670 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:02:40" (1/1) ... [2021-11-25 18:02:40,677 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:02:40,724 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:02:41,183 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_4d341d8c-8e35-44c3-b072-133fb14b84bc/sv-benchmarks/c/list-simple/dll2c_insert_unequal.i[25148,25161] [2021-11-25 18:02:41,187 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:02:41,201 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:02:41,287 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_4d341d8c-8e35-44c3-b072-133fb14b84bc/sv-benchmarks/c/list-simple/dll2c_insert_unequal.i[25148,25161] [2021-11-25 18:02:41,288 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:02:41,335 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:02:41,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:41 WrapperNode [2021-11-25 18:02:41,336 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:02:41,338 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:02:41,338 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:02:41,338 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:02:41,351 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:41" (1/1) ... [2021-11-25 18:02:41,391 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:41" (1/1) ... [2021-11-25 18:02:41,439 INFO L137 Inliner]: procedures = 127, calls = 58, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 191 [2021-11-25 18:02:41,440 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:02:41,441 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:02:41,441 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:02:41,441 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:02:41,451 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:41" (1/1) ... [2021-11-25 18:02:41,453 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:41" (1/1) ... [2021-11-25 18:02:41,474 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:41" (1/1) ... [2021-11-25 18:02:41,475 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:41" (1/1) ... [2021-11-25 18:02:41,487 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:41" (1/1) ... [2021-11-25 18:02:41,509 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:41" (1/1) ... [2021-11-25 18:02:41,519 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:41" (1/1) ... [2021-11-25 18:02:41,523 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:02:41,524 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:02:41,524 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:02:41,525 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:02:41,534 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:41" (1/1) ... [2021-11-25 18:02:41,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:02:41,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:02:41,576 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:02:41,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:02:41,629 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 18:02:41,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 18:02:41,630 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-11-25 18:02:41,630 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-11-25 18:02:41,631 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 18:02:41,631 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:02:41,631 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 18:02:41,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 18:02:41,631 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 18:02:41,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 18:02:41,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 18:02:41,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:02:41,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:02:41,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:02:41,801 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:02:41,809 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:02:42,432 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:02:42,525 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:02:42,525 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-25 18:02:42,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:02:42 BoogieIcfgContainer [2021-11-25 18:02:42,528 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:02:42,530 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:02:42,530 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:02:42,534 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:02:42,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:02:40" (1/3) ... [2021-11-25 18:02:42,535 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f7dcd9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:02:42, skipping insertion in model container [2021-11-25 18:02:42,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:41" (2/3) ... [2021-11-25 18:02:42,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f7dcd9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:02:42, skipping insertion in model container [2021-11-25 18:02:42,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:02:42" (3/3) ... [2021-11-25 18:02:42,540 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2c_insert_unequal.i [2021-11-25 18:02:42,549 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:02:42,549 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 82 error locations. [2021-11-25 18:02:42,613 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:02:42,652 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2021-11-25 18:02:42,653 INFO L340 AbstractCegarLoop]: Starting to check reachability of 82 error locations. [2021-11-25 18:02:42,675 INFO L276 IsEmpty]: Start isEmpty. Operand has 155 states, 68 states have (on average 2.4411764705882355) internal successors, (166), 150 states have internal predecessors, (166), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:02:42,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-25 18:02:42,683 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:02:42,684 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-25 18:02:42,685 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 78 more)] === [2021-11-25 18:02:42,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:02:42,691 INFO L85 PathProgramCache]: Analyzing trace with hash 303911087, now seen corresponding path program 1 times [2021-11-25 18:02:42,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:02:42,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402827640] [2021-11-25 18:02:42,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:02:42,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:02:42,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:02:42,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:02:42,900 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:02:42,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402827640] [2021-11-25 18:02:42,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402827640] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:02:42,901 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:02:42,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:02:42,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616892815] [2021-11-25 18:02:42,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:02:42,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:02:42,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:02:42,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:02:42,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:02:42,945 INFO L87 Difference]: Start difference. First operand has 155 states, 68 states have (on average 2.4411764705882355) internal successors, (166), 150 states have internal predecessors, (166), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:02:43,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:02:43,144 INFO L93 Difference]: Finished difference Result 152 states and 166 transitions. [2021-11-25 18:02:43,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:02:43,147 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-25 18:02:43,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:02:43,159 INFO L225 Difference]: With dead ends: 152 [2021-11-25 18:02:43,159 INFO L226 Difference]: Without dead ends: 150 [2021-11-25 18:02:43,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:02:43,166 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 8 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:02:43,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 213 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:02:43,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-25 18:02:43,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2021-11-25 18:02:43,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 67 states have (on average 2.343283582089552) internal successors, (157), 145 states have internal predecessors, (157), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:02:43,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 163 transitions. [2021-11-25 18:02:43,226 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 163 transitions. Word has length 5 [2021-11-25 18:02:43,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:02:43,226 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 163 transitions. [2021-11-25 18:02:43,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:02:43,227 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 163 transitions. [2021-11-25 18:02:43,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-25 18:02:43,228 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:02:43,228 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-25 18:02:43,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:02:43,229 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 78 more)] === [2021-11-25 18:02:43,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:02:43,230 INFO L85 PathProgramCache]: Analyzing trace with hash 303911088, now seen corresponding path program 1 times [2021-11-25 18:02:43,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:02:43,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393647196] [2021-11-25 18:02:43,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:02:43,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:02:43,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:02:43,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:02:43,296 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:02:43,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393647196] [2021-11-25 18:02:43,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393647196] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:02:43,297 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:02:43,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:02:43,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942153815] [2021-11-25 18:02:43,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:02:43,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:02:43,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:02:43,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:02:43,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:02:43,307 INFO L87 Difference]: Start difference. First operand 150 states and 163 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:02:43,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:02:43,520 INFO L93 Difference]: Finished difference Result 147 states and 160 transitions. [2021-11-25 18:02:43,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:02:43,520 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-25 18:02:43,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:02:43,523 INFO L225 Difference]: With dead ends: 147 [2021-11-25 18:02:43,523 INFO L226 Difference]: Without dead ends: 147 [2021-11-25 18:02:43,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:02:43,525 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 3 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:02:43,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 218 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:02:43,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-11-25 18:02:43,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2021-11-25 18:02:43,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 67 states have (on average 2.298507462686567) internal successors, (154), 142 states have internal predecessors, (154), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:02:43,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 160 transitions. [2021-11-25 18:02:43,551 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 160 transitions. Word has length 5 [2021-11-25 18:02:43,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:02:43,552 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 160 transitions. [2021-11-25 18:02:43,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:02:43,552 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 160 transitions. [2021-11-25 18:02:43,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 18:02:43,553 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:02:43,553 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:02:43,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 18:02:43,554 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 78 more)] === [2021-11-25 18:02:43,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:02:43,554 INFO L85 PathProgramCache]: Analyzing trace with hash 36050156, now seen corresponding path program 1 times [2021-11-25 18:02:43,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:02:43,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069646311] [2021-11-25 18:02:43,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:02:43,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:02:43,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:02:43,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:02:43,646 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:02:43,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069646311] [2021-11-25 18:02:43,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069646311] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:02:43,647 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:02:43,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:02:43,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233903481] [2021-11-25 18:02:43,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:02:43,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:02:43,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:02:43,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:02:43,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:02:43,649 INFO L87 Difference]: Start difference. First operand 147 states and 160 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:02:43,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:02:43,708 INFO L93 Difference]: Finished difference Result 158 states and 173 transitions. [2021-11-25 18:02:43,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:02:43,708 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-25 18:02:43,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:02:43,711 INFO L225 Difference]: With dead ends: 158 [2021-11-25 18:02:43,711 INFO L226 Difference]: Without dead ends: 158 [2021-11-25 18:02:43,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:02:43,714 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 10 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:02:43,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 277 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:02:43,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-25 18:02:43,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 148. [2021-11-25 18:02:43,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 68 states have (on average 2.2794117647058822) internal successors, (155), 143 states have internal predecessors, (155), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:02:43,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 161 transitions. [2021-11-25 18:02:43,732 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 161 transitions. Word has length 11 [2021-11-25 18:02:43,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:02:43,732 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 161 transitions. [2021-11-25 18:02:43,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:02:43,733 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 161 transitions. [2021-11-25 18:02:43,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-25 18:02:43,733 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:02:43,734 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:02:43,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 18:02:43,734 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 78 more)] === [2021-11-25 18:02:43,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:02:43,735 INFO L85 PathProgramCache]: Analyzing trace with hash -919966499, now seen corresponding path program 1 times [2021-11-25 18:02:43,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:02:43,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402551234] [2021-11-25 18:02:43,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:02:43,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:02:43,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:02:43,882 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 18:02:43,882 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:02:43,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402551234] [2021-11-25 18:02:43,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402551234] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:02:43,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:02:43,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:02:43,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053909440] [2021-11-25 18:02:43,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:02:43,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:02:43,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:02:43,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:02:43,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:02:43,888 INFO L87 Difference]: Start difference. First operand 148 states and 161 transitions. Second operand has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 18:02:44,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:02:44,193 INFO L93 Difference]: Finished difference Result 148 states and 162 transitions. [2021-11-25 18:02:44,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:02:44,194 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-11-25 18:02:44,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:02:44,196 INFO L225 Difference]: With dead ends: 148 [2021-11-25 18:02:44,196 INFO L226 Difference]: Without dead ends: 148 [2021-11-25 18:02:44,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:02:44,199 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 18 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:02:44,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 409 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 18:02:44,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-11-25 18:02:44,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2021-11-25 18:02:44,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 68 states have (on average 2.264705882352941) internal successors, (154), 142 states have internal predecessors, (154), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:02:44,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 160 transitions. [2021-11-25 18:02:44,227 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 160 transitions. Word has length 19 [2021-11-25 18:02:44,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:02:44,228 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 160 transitions. [2021-11-25 18:02:44,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 18:02:44,229 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 160 transitions. [2021-11-25 18:02:44,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-25 18:02:44,230 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:02:44,230 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:02:44,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 18:02:44,230 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 78 more)] === [2021-11-25 18:02:44,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:02:44,231 INFO L85 PathProgramCache]: Analyzing trace with hash -919966498, now seen corresponding path program 1 times [2021-11-25 18:02:44,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:02:44,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682204236] [2021-11-25 18:02:44,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:02:44,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:02:44,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:02:44,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:02:44,450 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:02:44,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682204236] [2021-11-25 18:02:44,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682204236] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:02:44,451 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:02:44,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:02:44,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626157448] [2021-11-25 18:02:44,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:02:44,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:02:44,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:02:44,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:02:44,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:02:44,456 INFO L87 Difference]: Start difference. First operand 147 states and 160 transitions. Second operand has 6 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 18:02:44,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:02:44,751 INFO L93 Difference]: Finished difference Result 147 states and 161 transitions. [2021-11-25 18:02:44,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:02:44,752 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-11-25 18:02:44,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:02:44,753 INFO L225 Difference]: With dead ends: 147 [2021-11-25 18:02:44,754 INFO L226 Difference]: Without dead ends: 147 [2021-11-25 18:02:44,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:02:44,755 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 16 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:02:44,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 486 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 18:02:44,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-11-25 18:02:44,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2021-11-25 18:02:44,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 68 states have (on average 2.25) internal successors, (153), 141 states have internal predecessors, (153), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:02:44,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 159 transitions. [2021-11-25 18:02:44,766 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 159 transitions. Word has length 19 [2021-11-25 18:02:44,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:02:44,767 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 159 transitions. [2021-11-25 18:02:44,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 18:02:44,768 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 159 transitions. [2021-11-25 18:02:44,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-25 18:02:44,769 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:02:44,769 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:02:44,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 18:02:44,770 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 78 more)] === [2021-11-25 18:02:44,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:02:44,770 INFO L85 PathProgramCache]: Analyzing trace with hash 675457150, now seen corresponding path program 1 times [2021-11-25 18:02:44,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:02:44,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544746655] [2021-11-25 18:02:44,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:02:44,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:02:44,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:02:44,939 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:02:44,939 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:02:44,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544746655] [2021-11-25 18:02:44,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544746655] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:02:44,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283245065] [2021-11-25 18:02:44,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:02:44,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:02:44,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:02:44,946 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:02:44,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:02:45,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:02:45,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-25 18:02:45,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:02:45,152 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:02:45,381 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:02:45,382 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 17 treesize of output 21 [2021-11-25 18:02:45,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:02:45,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:02:45,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283245065] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:02:45,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [24755977] [2021-11-25 18:02:45,571 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 18:02:45,572 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:02:45,578 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:02:45,585 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:02:45,585 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:02:45,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:45,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:45,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:02:45,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:45,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:45,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 27 treesize of output 33 [2021-11-25 18:02:45,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:02:45,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:02:45,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:02:45,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:02:45,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:02:45,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:45,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 18:02:45,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:02:45,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:45,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 18:02:45,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:02:45,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:45,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:45,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:45,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-11-25 18:02:45,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:45,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:45,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:45,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-11-25 18:02:45,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:45,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:45,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-11-25 18:02:46,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:46,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:46,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 27 treesize of output 33 [2021-11-25 18:02:46,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:46,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:46,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-11-25 18:02:46,410 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-25 18:02:46,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 240 treesize of output 229 [2021-11-25 18:02:46,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 18:02:46,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:02:46,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:02:46,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 18:02:46,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:02:46,812 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:02:46,815 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:02:46,936 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-25 18:02:46,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 240 treesize of output 229 [2021-11-25 18:02:47,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:02:47,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:02:47,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 18:02:47,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:02:47,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 18:02:47,315 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:02:47,317 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:02:47,322 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:02:47,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 26 treesize of output 21 [2021-11-25 18:02:47,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-25 18:02:47,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2021-11-25 18:02:47,597 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-25 18:02:47,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 240 treesize of output 229 [2021-11-25 18:02:47,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:47,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:02:47,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 27 treesize of output 33 [2021-11-25 18:02:47,815 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 90 for LOIs [2021-11-25 18:02:48,623 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:02:58,614 WARN L227 SmtUtils]: Spent 7.81s on a formula simplification. DAG size of input: 130 DAG size of output: 119 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:03:06,791 WARN L227 SmtUtils]: Spent 8.05s on a formula simplification. DAG size of input: 143 DAG size of output: 132 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:03:08,004 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1760#(and (< |#StackHeapBarrier| |ULTIMATE.start_main_~#s~0#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 4) 0) (= (select |#valid| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 1) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 4) 0) (not (= |ULTIMATE.start_dll_circular_create_~new_head~0#1.base| 0)) (<= 0 |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (<= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (= |ULTIMATE.start_dll_circular_create_~data#1| |ULTIMATE.start_dll_circular_create_#in~data#1|) (= |ULTIMATE.start_dll_circular_create_#in~len#1| |ULTIMATE.start_main_~len~0#1|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (< |ULTIMATE.start_dll_circular_create_~head~0#1.base| |#StackHeapBarrier|) (= |ULTIMATE.start_dll_circular_create_#in~len#1| |ULTIMATE.start_dll_circular_create_~len#1|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (= |ULTIMATE.start_main_~data~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 8) |ULTIMATE.start_dll_circular_create_~data#1|) (= (select |ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_main_~#s~0#1.base|) 0) (= (select |#length| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 12) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_dll_circular_create_~data#1|) (not (= |ULTIMATE.start_dll_circular_create_~head~0#1.base| 0)) (< |ULTIMATE.start_dll_circular_create_~new_head~0#1.base| |#StackHeapBarrier|) (= |ULTIMATE.start_dll_circular_create_~head~0#1.base| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (= |ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 0) (<= |ULTIMATE.start_dll_circular_create_~data#1| 1) (not (= (select |#valid| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) 1)) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:03:08,004 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:03:08,004 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:03:08,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2021-11-25 18:03:08,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668958362] [2021-11-25 18:03:08,005 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:03:08,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-25 18:03:08,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:03:08,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-25 18:03:08,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-11-25 18:03:08,007 INFO L87 Difference]: Start difference. First operand 146 states and 159 transitions. Second operand has 11 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 18:03:08,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:03:08,517 INFO L93 Difference]: Finished difference Result 153 states and 168 transitions. [2021-11-25 18:03:08,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:03:08,518 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2021-11-25 18:03:08,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:03:08,520 INFO L225 Difference]: With dead ends: 153 [2021-11-25 18:03:08,520 INFO L226 Difference]: Without dead ends: 153 [2021-11-25 18:03:08,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-11-25 18:03:08,521 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 3 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:03:08,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 661 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 606 Invalid, 0 Unknown, 106 Unchecked, 0.4s Time] [2021-11-25 18:03:08,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-25 18:03:08,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 151. [2021-11-25 18:03:08,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 72 states have (on average 2.2083333333333335) internal successors, (159), 145 states have internal predecessors, (159), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-25 18:03:08,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 167 transitions. [2021-11-25 18:03:08,541 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 167 transitions. Word has length 21 [2021-11-25 18:03:08,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:03:08,541 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 167 transitions. [2021-11-25 18:03:08,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 18:03:08,541 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 167 transitions. [2021-11-25 18:03:08,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-25 18:03:08,542 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:03:08,542 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:03:08,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:03:08,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:03:08,761 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 78 more)] === [2021-11-25 18:03:08,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:03:08,765 INFO L85 PathProgramCache]: Analyzing trace with hash 675457151, now seen corresponding path program 1 times [2021-11-25 18:03:08,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:03:08,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512709996] [2021-11-25 18:03:08,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:08,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:03:08,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:09,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:03:09,071 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:03:09,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512709996] [2021-11-25 18:03:09,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512709996] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:03:09,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814899904] [2021-11-25 18:03:09,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:09,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:03:09,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:03:09,073 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:03:09,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:03:09,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:09,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-25 18:03:09,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:03:09,201 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:03:09,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:09,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 18:03:09,451 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:03:09,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-25 18:03:09,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:03:09,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:03:09,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814899904] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:03:09,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [743522247] [2021-11-25 18:03:09,667 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 18:03:09,667 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:03:09,668 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:03:09,668 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:03:09,668 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:03:09,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:09,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:09,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:03:09,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:09,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:09,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 27 treesize of output 33 [2021-11-25 18:03:09,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:03:09,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:03:09,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:03:09,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:03:09,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:03:09,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:09,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 18:03:09,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:09,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 18:03:09,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:03:09,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2021-11-25 18:03:09,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:09,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:09,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:09,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-11-25 18:03:09,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:09,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:09,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:09,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-11-25 18:03:09,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:09,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:09,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-11-25 18:03:09,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:09,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:09,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 27 treesize of output 33 [2021-11-25 18:03:09,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:09,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:09,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-11-25 18:03:10,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:10,074 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:03:10,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 18:03:10,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:03:10,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 18:03:10,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:03:10,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 18:03:10,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:03:10,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:10,224 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:03:10,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 18:03:10,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:03:10,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:03:10,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 18:03:10,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 18:03:10,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:03:10,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:10,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2021-11-25 18:03:10,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:10,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 18:03:10,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:10,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 28 treesize of output 23 [2021-11-25 18:03:10,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:10,488 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:03:10,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 18:03:10,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:10,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:10,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 27 treesize of output 33 [2021-11-25 18:03:10,534 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 94 for LOIs [2021-11-25 18:03:11,202 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:03:19,916 WARN L227 SmtUtils]: Spent 7.05s on a formula simplification. DAG size of input: 134 DAG size of output: 122 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:03:28,439 WARN L227 SmtUtils]: Spent 8.38s on a formula simplification. DAG size of input: 147 DAG size of output: 135 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:03:29,503 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2176#(and (< |#StackHeapBarrier| |ULTIMATE.start_main_~#s~0#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 4)) 0) (= (select |#valid| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 1) (not (= |ULTIMATE.start_dll_circular_create_~new_head~0#1.base| 0)) (<= 0 |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (<= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (= |ULTIMATE.start_dll_circular_create_~data#1| |ULTIMATE.start_dll_circular_create_#in~data#1|) (= |ULTIMATE.start_dll_circular_create_#in~len#1| |ULTIMATE.start_main_~len~0#1|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (< |ULTIMATE.start_dll_circular_create_~head~0#1.base| |#StackHeapBarrier|) (= |ULTIMATE.start_dll_circular_create_#in~len#1| |ULTIMATE.start_dll_circular_create_~len#1|) (< (select |#length| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 8)) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (= |ULTIMATE.start_main_~data~0#1| 1) (= (select |ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_main_~#s~0#1.base|) 0) (= (select |#length| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 12) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_dll_circular_create_~data#1| (select (select |#memory_int| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 8))) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_dll_circular_create_~data#1|) (not (= |ULTIMATE.start_dll_circular_create_~head~0#1.base| 0)) (< |ULTIMATE.start_dll_circular_create_~new_head~0#1.base| |#StackHeapBarrier|) (= |ULTIMATE.start_dll_circular_create_~head~0#1.base| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 4)) 0) (= |ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 0) (<= |ULTIMATE.start_dll_circular_create_~data#1| 1) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:03:29,504 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:03:29,504 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:03:29,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-11-25 18:03:29,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497585727] [2021-11-25 18:03:29,504 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:03:29,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-25 18:03:29,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:03:29,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-25 18:03:29,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2021-11-25 18:03:29,506 INFO L87 Difference]: Start difference. First operand 151 states and 167 transitions. Second operand has 17 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 14 states have internal predecessors, (33), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-25 18:03:30,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:03:30,244 INFO L93 Difference]: Finished difference Result 153 states and 168 transitions. [2021-11-25 18:03:30,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 18:03:30,244 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 14 states have internal predecessors, (33), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 21 [2021-11-25 18:03:30,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:03:30,246 INFO L225 Difference]: With dead ends: 153 [2021-11-25 18:03:30,246 INFO L226 Difference]: Without dead ends: 153 [2021-11-25 18:03:30,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2021-11-25 18:03:30,247 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 14 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:03:30,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 720 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1017 Invalid, 0 Unknown, 84 Unchecked, 0.6s Time] [2021-11-25 18:03:30,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-25 18:03:30,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 151. [2021-11-25 18:03:30,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 72 states have (on average 2.1944444444444446) internal successors, (158), 145 states have internal predecessors, (158), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-25 18:03:30,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 166 transitions. [2021-11-25 18:03:30,252 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 166 transitions. Word has length 21 [2021-11-25 18:03:30,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:03:30,253 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 166 transitions. [2021-11-25 18:03:30,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 14 states have internal predecessors, (33), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-25 18:03:30,253 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 166 transitions. [2021-11-25 18:03:30,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-25 18:03:30,254 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:03:30,254 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:03:30,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 18:03:30,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:03:30,454 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 78 more)] === [2021-11-25 18:03:30,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:03:30,455 INFO L85 PathProgramCache]: Analyzing trace with hash 574422547, now seen corresponding path program 1 times [2021-11-25 18:03:30,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:03:30,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148783020] [2021-11-25 18:03:30,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:30,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:03:30,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:30,542 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:03:30,543 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:03:30,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148783020] [2021-11-25 18:03:30,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148783020] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:03:30,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943008663] [2021-11-25 18:03:30,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:30,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:03:30,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:03:30,554 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:03:30,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 18:03:30,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:30,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 18:03:30,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:03:30,709 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:03:30,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:03:30,760 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:03:30,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943008663] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:03:30,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1519187511] [2021-11-25 18:03:30,765 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-25 18:03:30,765 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:03:30,765 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:03:30,766 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:03:30,766 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:03:30,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:30,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:30,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:03:30,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:30,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:30,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 27 treesize of output 33 [2021-11-25 18:03:30,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:03:30,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:03:30,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:03:30,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:03:30,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:03:30,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:03:30,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:30,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 18:03:30,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:30,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 18:03:30,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:30,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:30,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:30,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-11-25 18:03:30,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:30,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:30,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:30,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-11-25 18:03:30,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:03:30,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:30,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:30,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-11-25 18:03:30,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:30,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:30,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 27 treesize of output 33 [2021-11-25 18:03:31,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:31,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:31,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-11-25 18:03:31,183 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-25 18:03:31,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 240 treesize of output 229 [2021-11-25 18:03:31,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 18:03:31,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:03:31,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:03:31,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 18:03:31,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:03:31,449 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:31,452 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:31,550 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-25 18:03:31,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 240 treesize of output 229 [2021-11-25 18:03:31,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:31,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-25 18:03:31,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:03:31,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:31,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-25 18:03:31,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 18:03:31,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-11-25 18:03:31,861 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:31,864 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:31,867 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:31,869 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:31,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 26 treesize of output 21 [2021-11-25 18:03:31,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-25 18:03:31,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2021-11-25 18:03:32,075 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-25 18:03:32,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 240 treesize of output 229 [2021-11-25 18:03:32,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:03:32,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:03:32,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:03:32,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 18:03:32,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 18:03:32,393 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:32,396 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:32,399 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:32,487 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-25 18:03:32,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 240 treesize of output 229 [2021-11-25 18:03:32,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:03:32,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:03:32,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 18:03:32,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:03:32,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 18:03:32,768 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:32,771 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:32,774 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:03:32,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:03:32,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:32,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 278 treesize of output 262 [2021-11-25 18:03:32,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:32,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:03:32,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:32,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:03:32,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 276 treesize of output 263 [2021-11-25 18:03:32,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:32,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:03:32,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:32,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:03:32,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 270 treesize of output 257 [2021-11-25 18:03:33,092 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-25 18:03:33,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 240 treesize of output 229 [2021-11-25 18:03:33,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:33,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:33,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 27 treesize of output 33 [2021-11-25 18:03:33,333 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 90 for LOIs [2021-11-25 18:03:33,898 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:03:42,843 WARN L227 SmtUtils]: Spent 7.61s on a formula simplification. DAG size of input: 130 DAG size of output: 119 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:03:51,190 WARN L227 SmtUtils]: Spent 8.26s on a formula simplification. DAG size of input: 143 DAG size of output: 133 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:03:52,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1519187511] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:03:52,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:03:52,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [6, 6, 6] total 17 [2021-11-25 18:03:52,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512047178] [2021-11-25 18:03:52,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:03:52,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-25 18:03:52,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:03:52,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-25 18:03:52,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-11-25 18:03:52,604 INFO L87 Difference]: Start difference. First operand 151 states and 166 transitions. Second operand has 13 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 9 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:03:53,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:03:53,769 INFO L93 Difference]: Finished difference Result 157 states and 170 transitions. [2021-11-25 18:03:53,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-25 18:03:53,770 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 9 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2021-11-25 18:03:53,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:03:53,771 INFO L225 Difference]: With dead ends: 157 [2021-11-25 18:03:53,771 INFO L226 Difference]: Without dead ends: 157 [2021-11-25 18:03:53,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-11-25 18:03:53,773 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 1 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 1413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 625 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:03:53,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 444 Invalid, 1413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 788 Invalid, 0 Unknown, 625 Unchecked, 1.1s Time] [2021-11-25 18:03:53,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-11-25 18:03:53,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2021-11-25 18:03:53,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 77 states have (on average 2.103896103896104) internal successors, (162), 150 states have internal predecessors, (162), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-25 18:03:53,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 170 transitions. [2021-11-25 18:03:53,779 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 170 transitions. Word has length 23 [2021-11-25 18:03:53,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:03:53,780 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 170 transitions. [2021-11-25 18:03:53,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 9 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:03:53,780 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 170 transitions. [2021-11-25 18:03:53,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-25 18:03:53,781 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:03:53,781 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:03:53,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 18:03:53,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:03:53,982 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 78 more)] === [2021-11-25 18:03:53,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:03:53,983 INFO L85 PathProgramCache]: Analyzing trace with hash 622180340, now seen corresponding path program 1 times [2021-11-25 18:03:53,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:03:53,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860230815] [2021-11-25 18:03:53,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:53,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:03:54,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:54,081 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 18:03:54,082 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:03:54,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860230815] [2021-11-25 18:03:54,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860230815] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:03:54,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056690553] [2021-11-25 18:03:54,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:54,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:03:54,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:03:54,086 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:03:54,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 18:03:54,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:54,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 18:03:54,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:03:54,227 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 18:03:54,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:03:54,241 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 18:03:54,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2021-11-25 18:03:54,287 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 18:03:54,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056690553] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:03:54,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [284497742] [2021-11-25 18:03:54,290 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-25 18:03:54,290 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:03:54,291 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:03:54,291 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:03:54,291 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:03:54,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:54,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:54,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:03:54,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:54,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:54,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 27 treesize of output 33 [2021-11-25 18:03:54,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:03:54,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:03:54,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:03:54,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:03:54,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:03:54,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:03:54,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:54,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 18:03:54,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:54,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 18:03:54,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:54,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:54,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:54,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-11-25 18:03:54,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:54,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:54,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:54,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-11-25 18:03:54,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:03:54,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:54,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:54,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-11-25 18:03:54,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:54,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:54,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 27 treesize of output 33 [2021-11-25 18:03:54,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:54,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:54,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-11-25 18:03:54,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:54,614 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:03:54,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 18:03:54,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:03:54,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 18:03:54,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 18:03:54,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:03:54,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:03:54,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:54,728 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:03:54,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 18:03:54,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 18:03:54,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 18:03:54,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:03:54,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:03:54,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:03:54,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:54,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2021-11-25 18:03:54,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:54,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 18:03:54,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:54,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 28 treesize of output 23 [2021-11-25 18:03:54,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:54,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:03:54,956 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 18:03:54,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 30 treesize of output 36 [2021-11-25 18:03:54,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:54,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:03:54,987 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-25 18:03:54,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 30 treesize of output 32 [2021-11-25 18:03:55,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:55,006 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 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-25 18:03:55,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:55,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:03:55,079 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 18:03:55,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 30 treesize of output 36 [2021-11-25 18:03:55,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:55,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:03:55,109 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-25 18:03:55,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 30 treesize of output 32 [2021-11-25 18:03:55,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:55,137 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 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-25 18:03:55,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:55,270 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:03:55,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 18:03:55,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 18:03:55,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:03:55,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 18:03:55,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:03:55,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:03:55,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:55,384 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:03:55,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 18:03:55,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:03:55,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:03:55,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 18:03:55,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:03:55,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 18:03:55,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:03:55,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:55,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 278 treesize of output 262 [2021-11-25 18:03:55,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:55,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:03:55,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:03:55,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 276 treesize of output 263 [2021-11-25 18:03:55,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:55,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:03:55,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:55,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:03:55,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 270 treesize of output 257 [2021-11-25 18:03:55,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:55,719 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:03:55,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 18:03:55,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:55,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:55,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 27 treesize of output 33 [2021-11-25 18:03:55,757 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 94 for LOIs [2021-11-25 18:03:56,339 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:04:05,323 WARN L227 SmtUtils]: Spent 7.43s on a formula simplification. DAG size of input: 134 DAG size of output: 119 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:04:13,407 WARN L227 SmtUtils]: Spent 7.99s on a formula simplification. DAG size of input: 147 DAG size of output: 135 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:04:15,190 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3102#(and (<= 2 |ULTIMATE.start_dll_circular_create_#in~len#1|) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (<= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~data#1| 1) (<= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (<= |#NULL.offset| 0) (not (= (select |#valid| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) 1)) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 1 |ULTIMATE.start_dll_circular_create_#in~data#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 1 |ULTIMATE.start_dll_circular_create_~data#1|) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 2) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= |ULTIMATE.start_dll_circular_create_~data#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (<= 0 |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2021-11-25 18:04:15,191 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:04:15,191 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:04:15,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 4 [2021-11-25 18:04:15,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315206915] [2021-11-25 18:04:15,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:04:15,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:04:15,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:04:15,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:04:15,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-11-25 18:04:15,193 INFO L87 Difference]: Start difference. First operand 157 states and 170 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 18:04:15,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:04:15,405 INFO L93 Difference]: Finished difference Result 162 states and 177 transitions. [2021-11-25 18:04:15,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:04:15,405 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-11-25 18:04:15,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:04:15,407 INFO L225 Difference]: With dead ends: 162 [2021-11-25 18:04:15,407 INFO L226 Difference]: Without dead ends: 162 [2021-11-25 18:04:15,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-25 18:04:15,408 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 8 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:04:15,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 402 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:04:15,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-11-25 18:04:15,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 160. [2021-11-25 18:04:15,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 80 states have (on average 2.0875) internal successors, (167), 153 states have internal predecessors, (167), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-25 18:04:15,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 175 transitions. [2021-11-25 18:04:15,416 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 175 transitions. Word has length 24 [2021-11-25 18:04:15,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:04:15,416 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 175 transitions. [2021-11-25 18:04:15,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 18:04:15,417 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 175 transitions. [2021-11-25 18:04:15,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-25 18:04:15,417 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:04:15,418 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:04:15,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 18:04:15,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:04:15,633 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 78 more)] === [2021-11-25 18:04:15,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:04:15,634 INFO L85 PathProgramCache]: Analyzing trace with hash 622180341, now seen corresponding path program 1 times [2021-11-25 18:04:15,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:04:15,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695731490] [2021-11-25 18:04:15,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:04:15,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:04:15,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:04:15,746 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:04:15,747 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:04:15,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695731490] [2021-11-25 18:04:15,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695731490] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:04:15,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255003653] [2021-11-25 18:04:15,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:04:15,748 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:04:15,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:04:15,751 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:04:15,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 18:04:15,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:04:15,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-25 18:04:15,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:04:16,015 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:04:16,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:04:16,054 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:04:16,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2021-11-25 18:04:16,196 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:04:16,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255003653] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:04:16,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1151420565] [2021-11-25 18:04:16,202 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-25 18:04:16,202 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:04:16,203 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:04:16,203 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:04:16,203 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:04:16,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:16,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:16,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:04:16,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:16,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:16,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 27 treesize of output 33 [2021-11-25 18:04:16,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:04:16,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:04:16,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:04:16,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:04:16,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:04:16,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:16,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 18:04:16,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:16,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 18:04:16,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:04:16,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:16,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:16,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:16,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-11-25 18:04:16,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:04:16,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:16,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:16,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:16,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-11-25 18:04:16,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:16,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:16,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-11-25 18:04:16,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:16,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:16,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 27 treesize of output 33 [2021-11-25 18:04:16,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:16,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:16,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-11-25 18:04:16,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:16,508 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:04:16,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 18:04:16,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:04:16,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:04:16,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 18:04:16,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:04:16,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 18:04:16,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:16,621 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:04:16,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 18:04:16,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:04:16,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:04:16,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 18:04:16,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 18:04:16,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:04:16,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:04:16,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:16,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 278 treesize of output 262 [2021-11-25 18:04:16,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:16,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:04:16,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:04:16,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 276 treesize of output 263 [2021-11-25 18:04:16,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:16,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:04:16,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:16,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:04:16,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 270 treesize of output 257 [2021-11-25 18:04:16,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:16,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 260 treesize of output 238 [2021-11-25 18:04:17,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:17,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:04:17,019 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-25 18:04:17,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 261 treesize of output 257 [2021-11-25 18:04:17,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:17,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:04:17,053 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 18:04:17,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 261 treesize of output 261 [2021-11-25 18:04:17,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:17,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 260 treesize of output 238 [2021-11-25 18:04:17,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:17,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:04:17,250 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-25 18:04:17,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 261 treesize of output 257 [2021-11-25 18:04:17,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:17,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:04:17,275 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 18:04:17,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 261 treesize of output 261 [2021-11-25 18:04:17,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:17,458 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:04:17,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 18:04:17,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:04:17,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:04:17,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 18:04:17,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 18:04:17,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:04:17,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:17,579 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:04:17,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 18:04:17,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 18:04:17,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:04:17,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:04:17,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:04:17,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 18:04:17,716 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 11 treesize of output 7 [2021-11-25 18:04:17,722 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 11 treesize of output 7 [2021-11-25 18:04:17,732 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 15 treesize of output 1 [2021-11-25 18:04:17,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:17,761 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:04:17,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 18:04:17,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:17,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:17,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 27 treesize of output 33 [2021-11-25 18:04:17,791 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 94 for LOIs [2021-11-25 18:04:18,385 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:04:27,367 WARN L227 SmtUtils]: Spent 7.31s on a formula simplification. DAG size of input: 134 DAG size of output: 119 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:04:35,123 WARN L227 SmtUtils]: Spent 7.63s on a formula simplification. DAG size of input: 147 DAG size of output: 135 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:04:36,742 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3596#(and (< (select |#length| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 4)) (<= 2 |ULTIMATE.start_dll_circular_create_#in~len#1|) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (<= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~data#1| 1) (<= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (<= |#NULL.offset| 0) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 1 |ULTIMATE.start_dll_circular_create_#in~data#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 1 |ULTIMATE.start_dll_circular_create_~data#1|) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 2) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= |ULTIMATE.start_dll_circular_create_~data#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (<= 0 |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2021-11-25 18:04:36,743 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:04:36,743 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:04:36,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2021-11-25 18:04:36,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178089328] [2021-11-25 18:04:36,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:04:36,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-25 18:04:36,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:04:36,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-25 18:04:36,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-11-25 18:04:36,745 INFO L87 Difference]: Start difference. First operand 160 states and 175 transitions. Second operand has 15 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 13 states have internal predecessors, (43), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-25 18:04:37,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:04:37,118 INFO L93 Difference]: Finished difference Result 165 states and 181 transitions. [2021-11-25 18:04:37,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 18:04:37,119 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 13 states have internal predecessors, (43), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 24 [2021-11-25 18:04:37,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:04:37,120 INFO L225 Difference]: With dead ends: 165 [2021-11-25 18:04:37,120 INFO L226 Difference]: Without dead ends: 165 [2021-11-25 18:04:37,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2021-11-25 18:04:37,122 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 19 mSDsluCounter, 1178 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 1192 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:04:37,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 1192 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 18:04:37,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-25 18:04:37,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 160. [2021-11-25 18:04:37,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 80 states have (on average 2.075) internal successors, (166), 153 states have internal predecessors, (166), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-25 18:04:37,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 174 transitions. [2021-11-25 18:04:37,128 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 174 transitions. Word has length 24 [2021-11-25 18:04:37,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:04:37,128 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 174 transitions. [2021-11-25 18:04:37,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 13 states have internal predecessors, (43), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-25 18:04:37,129 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 174 transitions. [2021-11-25 18:04:37,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-25 18:04:37,130 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:04:37,130 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:04:37,155 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-25 18:04:37,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-25 18:04:37,345 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 78 more)] === [2021-11-25 18:04:37,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:04:37,346 INFO L85 PathProgramCache]: Analyzing trace with hash 2107721361, now seen corresponding path program 1 times [2021-11-25 18:04:37,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:04:37,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382690499] [2021-11-25 18:04:37,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:04:37,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:04:37,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:04:37,410 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 18:04:37,411 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:04:37,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382690499] [2021-11-25 18:04:37,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382690499] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:04:37,411 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:04:37,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 18:04:37,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814612234] [2021-11-25 18:04:37,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:04:37,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:04:37,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:04:37,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:04:37,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:04:37,413 INFO L87 Difference]: Start difference. First operand 160 states and 174 transitions. Second operand has 7 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 18:04:37,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:04:37,731 INFO L93 Difference]: Finished difference Result 160 states and 174 transitions. [2021-11-25 18:04:37,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:04:37,732 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2021-11-25 18:04:37,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:04:37,734 INFO L225 Difference]: With dead ends: 160 [2021-11-25 18:04:37,734 INFO L226 Difference]: Without dead ends: 160 [2021-11-25 18:04:37,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-25 18:04:37,735 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 18 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:04:37,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 469 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 18:04:37,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-25 18:04:37,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2021-11-25 18:04:37,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 80 states have (on average 2.0625) internal successors, (165), 152 states have internal predecessors, (165), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-25 18:04:37,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 173 transitions. [2021-11-25 18:04:37,745 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 173 transitions. Word has length 25 [2021-11-25 18:04:37,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:04:37,746 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 173 transitions. [2021-11-25 18:04:37,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 18:04:37,746 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 173 transitions. [2021-11-25 18:04:37,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-25 18:04:37,751 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:04:37,752 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:04:37,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-25 18:04:37,752 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 78 more)] === [2021-11-25 18:04:37,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:04:37,753 INFO L85 PathProgramCache]: Analyzing trace with hash 2107721362, now seen corresponding path program 1 times [2021-11-25 18:04:37,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:04:37,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14137769] [2021-11-25 18:04:37,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:04:37,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:04:37,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:04:37,880 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:04:37,880 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:04:37,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14137769] [2021-11-25 18:04:37,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14137769] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:04:37,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:04:37,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 18:04:37,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130210997] [2021-11-25 18:04:37,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:04:37,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:04:37,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:04:37,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:04:37,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:04:37,883 INFO L87 Difference]: Start difference. First operand 159 states and 173 transitions. Second operand has 7 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 18:04:38,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:04:38,176 INFO L93 Difference]: Finished difference Result 158 states and 172 transitions. [2021-11-25 18:04:38,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:04:38,177 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2021-11-25 18:04:38,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:04:38,179 INFO L225 Difference]: With dead ends: 158 [2021-11-25 18:04:38,179 INFO L226 Difference]: Without dead ends: 158 [2021-11-25 18:04:38,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-25 18:04:38,180 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 15 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:04:38,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 499 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 18:04:38,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-25 18:04:38,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2021-11-25 18:04:38,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 80 states have (on average 2.05) internal successors, (164), 151 states have internal predecessors, (164), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-25 18:04:38,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 172 transitions. [2021-11-25 18:04:38,193 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 172 transitions. Word has length 25 [2021-11-25 18:04:38,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:04:38,194 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 172 transitions. [2021-11-25 18:04:38,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 18:04:38,196 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 172 transitions. [2021-11-25 18:04:38,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-25 18:04:38,197 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:04:38,197 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:04:38,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-25 18:04:38,197 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 78 more)] === [2021-11-25 18:04:38,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:04:38,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1425906564, now seen corresponding path program 1 times [2021-11-25 18:04:38,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:04:38,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745061746] [2021-11-25 18:04:38,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:04:38,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:04:38,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:04:38,423 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 18:04:38,423 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:04:38,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745061746] [2021-11-25 18:04:38,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745061746] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:04:38,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430706883] [2021-11-25 18:04:38,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:04:38,424 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:04:38,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:04:38,424 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:04:38,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 18:04:38,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:04:38,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-25 18:04:38,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:04:38,580 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:04:38,591 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 5 treesize of output 3 [2021-11-25 18:04:38,746 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:04:38,746 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 12 treesize of output 14 [2021-11-25 18:04:38,828 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:04:38,829 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 12 treesize of output 14 [2021-11-25 18:04:38,848 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 18:04:38,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:04:39,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430706883] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:04:39,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [809223344] [2021-11-25 18:04:39,206 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2021-11-25 18:04:39,207 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:04:39,207 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:04:39,207 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:04:39,207 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:04:39,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:39,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:39,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:04:39,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:39,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:39,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 27 treesize of output 33 [2021-11-25 18:04:39,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:04:39,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:04:39,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:04:39,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:04:39,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:04:39,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:39,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 18:04:39,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:39,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 18:04:39,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:04:39,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:04:39,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:39,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:39,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:39,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-11-25 18:04:39,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:39,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:39,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:39,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-11-25 18:04:39,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:39,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:39,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-11-25 18:04:39,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:39,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:39,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 27 treesize of output 33 [2021-11-25 18:04:39,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:39,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:39,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-11-25 18:04:39,562 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-25 18:04:39,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 240 treesize of output 229 [2021-11-25 18:04:39,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:39,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-25 18:04:39,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-11-25 18:04:39,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:04:39,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:39,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-25 18:04:39,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 18:04:39,844 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:04:39,850 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:04:39,852 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:04:39,934 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-25 18:04:39,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 240 treesize of output 229 [2021-11-25 18:04:40,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:04:40,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:04:40,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:04:40,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 18:04:40,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 18:04:40,251 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:04:40,256 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:04:40,258 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:04:40,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:04:40,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:40,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 278 treesize of output 262 [2021-11-25 18:04:40,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:40,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:04:40,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:04:40,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 276 treesize of output 263 [2021-11-25 18:04:40,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:40,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:04:40,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:40,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:04:40,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 270 treesize of output 257 [2021-11-25 18:04:40,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:40,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 260 treesize of output 238 [2021-11-25 18:04:40,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:40,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:04:40,572 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 18:04:40,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 261 treesize of output 261 [2021-11-25 18:04:40,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:40,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:04:40,603 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-25 18:04:40,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 249 treesize of output 245 [2021-11-25 18:04:40,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:40,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 260 treesize of output 238 [2021-11-25 18:04:40,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:40,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:04:40,751 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 18:04:40,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 261 treesize of output 261 [2021-11-25 18:04:40,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:40,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:04:40,775 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-25 18:04:40,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 249 treesize of output 245 [2021-11-25 18:04:40,919 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 11 treesize of output 7 [2021-11-25 18:04:40,926 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 11 treesize of output 7 [2021-11-25 18:04:40,937 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 15 treesize of output 1 [2021-11-25 18:04:40,967 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 19 treesize of output 1 [2021-11-25 18:04:40,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:40,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 18:04:40,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:40,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 18:04:41,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:41,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:41,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:04:41,105 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:04:41,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2021-11-25 18:04:41,121 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:04:41,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-11-25 18:04:41,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:41,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:41,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:04:41,154 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:04:41,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2021-11-25 18:04:41,173 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:04:41,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:04:41,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:41,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:41,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:04:41,378 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:04:41,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2021-11-25 18:04:41,398 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:04:41,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:04:41,420 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:04:41,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-11-25 18:04:41,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:41,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:41,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:04:41,454 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:04:41,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2021-11-25 18:04:41,748 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-25 18:04:41,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 240 treesize of output 229 [2021-11-25 18:04:41,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:04:41,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 18:04:41,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:04:41,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 18:04:41,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:04:42,004 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:04:42,006 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:04:42,008 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:04:42,095 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-25 18:04:42,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 240 treesize of output 229 [2021-11-25 18:04:42,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:04:42,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:04:42,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:04:42,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 18:04:42,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 18:04:42,369 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:04:42,372 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:04:42,375 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:04:42,436 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 11 treesize of output 7 [2021-11-25 18:04:42,445 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 15 treesize of output 1 [2021-11-25 18:04:42,466 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 11 treesize of output 7 [2021-11-25 18:04:42,539 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-25 18:04:42,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 240 treesize of output 229 [2021-11-25 18:04:42,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:42,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:42,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 27 treesize of output 33 [2021-11-25 18:04:42,719 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 13 for LOIs [2021-11-25 18:04:42,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:04:42,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:04:42,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:04:42,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:04:42,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:04:42,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:42,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 18:04:42,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:04:42,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:42,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 18:04:42,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:42,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:42,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:42,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-11-25 18:04:42,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:04:42,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:42,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:42,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:42,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-11-25 18:04:42,822 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:04:46,708 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4796#(and (= |ULTIMATE.start_main_~mid_index~0#1| (ite (and (not (= (mod |ULTIMATE.start_main_~len~0#1| 2) 0)) (< |ULTIMATE.start_main_~len~0#1| 0)) (+ (div |ULTIMATE.start_main_~len~0#1| 2) 1) (div |ULTIMATE.start_main_~len~0#1| 2))) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 0) 0) (= |ULTIMATE.start_dll_circular_insert_~head#1.base| |ULTIMATE.start_dll_circular_insert_#in~head#1.base|) (<= 2 |ULTIMATE.start_dll_circular_create_#in~len#1|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 0) 0) (= |ULTIMATE.start_main_~uneq~0#1| |ULTIMATE.start_dll_circular_insert_#in~data#1|) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (<= 0 |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~data#1| 1) (<= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= |ULTIMATE.start_main_~uneq~0#1| 5) (= |ULTIMATE.start_dll_circular_insert_#in~data#1| |ULTIMATE.start_dll_circular_insert_~data#1|) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |ULTIMATE.start_main_~mid_index~0#1| |ULTIMATE.start_dll_circular_insert_#in~index#1|) (not (= |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| 0)) (= |ULTIMATE.start_dll_circular_insert_~snd_to_last~0#1.offset| 0) (= |ULTIMATE.start_dll_circular_insert_~new_node~0#1.offset| 0) (= 1 (select |#valid| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|)) (= |ULTIMATE.start_main_~#s~0#1.offset| |ULTIMATE.start_dll_circular_insert_#in~head#1.offset|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4) 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 4) 0) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 1 |ULTIMATE.start_dll_circular_create_#in~data#1|) (= |ULTIMATE.start_dll_circular_insert_~snd_to_last~0#1.base| 0) (= |ULTIMATE.start_dll_circular_insert_~index#1| |ULTIMATE.start_dll_circular_insert_#in~index#1|) (= (select |#length| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 12) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_dll_circular_create_~data#1|) (< |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (= |ULTIMATE.start_dll_circular_insert_~head#1.offset| |ULTIMATE.start_dll_circular_insert_#in~head#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#res#1.offset| 0) (<= |ULTIMATE.start_dll_circular_insert_~head#1.offset| 0) (not (= 1 (select |#valid| |ULTIMATE.start_dll_circular_insert_~head#1.base|))) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 2) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= |ULTIMATE.start_dll_circular_create_~data#1| 1) (= |ULTIMATE.start_dll_circular_insert_~data#1| (select (select |#memory_int| |ULTIMATE.start_dll_circular_insert_~new_node~0#1.base|) 8)) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (= |ULTIMATE.start_dll_circular_insert_#in~head#1.base| |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (= |#NULL.base| 0))' at error location [2021-11-25 18:04:46,708 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:04:46,708 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:04:46,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 12 [2021-11-25 18:04:46,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570995272] [2021-11-25 18:04:46,709 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:04:46,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-25 18:04:46,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:04:46,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-25 18:04:46,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1133, Unknown=0, NotChecked=0, Total=1260 [2021-11-25 18:04:46,710 INFO L87 Difference]: Start difference. First operand 158 states and 172 transitions. Second operand has 14 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 12 states have internal predecessors, (40), 3 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-25 18:04:47,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:04:47,118 INFO L93 Difference]: Finished difference Result 164 states and 179 transitions. [2021-11-25 18:04:47,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:04:47,118 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 12 states have internal predecessors, (40), 3 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 34 [2021-11-25 18:04:47,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:04:47,120 INFO L225 Difference]: With dead ends: 164 [2021-11-25 18:04:47,120 INFO L226 Difference]: Without dead ends: 164 [2021-11-25 18:04:47,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 66 SyntacticMatches, 9 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=144, Invalid=1262, Unknown=0, NotChecked=0, Total=1406 [2021-11-25 18:04:47,122 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 371 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:04:47,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 418 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 473 Invalid, 0 Unknown, 94 Unchecked, 0.4s Time] [2021-11-25 18:04:47,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-25 18:04:47,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 147. [2021-11-25 18:04:47,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 80 states have (on average 1.9125) internal successors, (153), 140 states have internal predecessors, (153), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-25 18:04:47,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 161 transitions. [2021-11-25 18:04:47,128 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 161 transitions. Word has length 34 [2021-11-25 18:04:47,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:04:47,129 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 161 transitions. [2021-11-25 18:04:47,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 12 states have internal predecessors, (40), 3 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-25 18:04:47,129 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 161 transitions. [2021-11-25 18:04:47,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-25 18:04:47,130 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:04:47,131 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:04:47,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 18:04:47,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-25 18:04:47,345 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 78 more)] === [2021-11-25 18:04:47,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:04:47,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1425906565, now seen corresponding path program 1 times [2021-11-25 18:04:47,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:04:47,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051092492] [2021-11-25 18:04:47,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:04:47,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:04:47,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:04:47,622 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 18:04:47,622 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:04:47,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051092492] [2021-11-25 18:04:47,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051092492] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:04:47,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138443971] [2021-11-25 18:04:47,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:04:47,623 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:04:47,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:04:47,624 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:04:47,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 18:04:47,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:04:47,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-25 18:04:47,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:04:47,842 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:04:47,875 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 5 treesize of output 3 [2021-11-25 18:04:47,982 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 5 treesize of output 3 [2021-11-25 18:04:48,079 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: line 664299 column 46: unknown constant v_#length_BEFORE_CALL_87 [2021-11-25 18:04:48,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [278295264] [2021-11-25 18:04:48,081 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2021-11-25 18:04:48,081 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:04:48,082 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:04:48,082 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:04:48,082 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:04:48,124 FATAL L? ?]: Ignoring exception! java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@1be9de07 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:401) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:184) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne3(DualJunctionSaa.java:166) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne2(DualJunctionSaa.java:154) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne1(DualJunctionSaa.java:142) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne0(DualJunctionSaa.java:124) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:110) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:95) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:90) 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) [2021-11-25 18:04:48,136 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:04:48,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-25 18:04:48,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37548054] [2021-11-25 18:04:48,136 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-25 18:04:48,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 18:04:48,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:04:48,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 18:04:48,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-25 18:04:48,144 INFO L87 Difference]: Start difference. First operand 147 states and 161 transitions. Second operand has 12 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:04:48,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-25 18:04:48,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-25 18:04:48,146 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 [2021-11-25 18:04:48,146 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] [2021-11-25 18:04:48,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 18:04:48,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-25 18:04:48,363 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.modelcheckerutils.smt.MonolithicImplicationChecker@1be9de07 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) [2021-11-25 18:04:48,367 INFO L158 Benchmark]: Toolchain (without parser) took 127705.54ms. Allocated memory was 92.3MB in the beginning and 201.3MB in the end (delta: 109.1MB). Free memory was 57.7MB in the beginning and 94.4MB in the end (delta: -36.7MB). Peak memory consumption was 72.0MB. Max. memory is 16.1GB. [2021-11-25 18:04:48,367 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 92.3MB. Free memory was 46.5MB in the beginning and 46.4MB in the end (delta: 45.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 18:04:48,367 INFO L158 Benchmark]: CACSL2BoogieTranslator took 673.90ms. Allocated memory was 92.3MB in the beginning and 111.1MB in the end (delta: 18.9MB). Free memory was 57.6MB in the beginning and 79.4MB in the end (delta: -21.9MB). Peak memory consumption was 9.9MB. Max. memory is 16.1GB. [2021-11-25 18:04:48,368 INFO L158 Benchmark]: Boogie Procedure Inliner took 102.46ms. Allocated memory is still 111.1MB. Free memory was 78.9MB in the beginning and 76.7MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 18:04:48,368 INFO L158 Benchmark]: Boogie Preprocessor took 82.33ms. Allocated memory is still 111.1MB. Free memory was 76.7MB in the beginning and 74.2MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 18:04:48,368 INFO L158 Benchmark]: RCFGBuilder took 1003.91ms. Allocated memory is still 111.1MB. Free memory was 74.2MB in the beginning and 45.9MB in the end (delta: 28.4MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. [2021-11-25 18:04:48,369 INFO L158 Benchmark]: TraceAbstraction took 125835.75ms. Allocated memory was 111.1MB in the beginning and 201.3MB in the end (delta: 90.2MB). Free memory was 45.4MB in the beginning and 94.4MB in the end (delta: -49.0MB). Peak memory consumption was 41.1MB. Max. memory is 16.1GB. [2021-11-25 18:04:48,371 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 92.3MB. Free memory was 46.5MB in the beginning and 46.4MB in the end (delta: 45.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 673.90ms. Allocated memory was 92.3MB in the beginning and 111.1MB in the end (delta: 18.9MB). Free memory was 57.6MB in the beginning and 79.4MB in the end (delta: -21.9MB). Peak memory consumption was 9.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 102.46ms. Allocated memory is still 111.1MB. Free memory was 78.9MB in the beginning and 76.7MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 82.33ms. Allocated memory is still 111.1MB. Free memory was 76.7MB in the beginning and 74.2MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1003.91ms. Allocated memory is still 111.1MB. Free memory was 74.2MB in the beginning and 45.9MB in the end (delta: 28.4MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. * TraceAbstraction took 125835.75ms. Allocated memory was 111.1MB in the beginning and 201.3MB in the end (delta: 90.2MB). Free memory was 45.4MB in the beginning and 94.4MB in the end (delta: -49.0MB). Peak memory consumption was 41.1MB. 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.modelcheckerutils.smt.MonolithicImplicationChecker@1be9de07 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@1be9de07: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-25 18:04:48,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 1 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_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2c_insert_unequal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1b81f923e96224472f8219a473f794261ff02356a47c6b09b527f0fc600725a8 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:04:50,986 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:04:50,990 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:04:51,044 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:04:51,045 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:04:51,051 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:04:51,055 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:04:51,060 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:04:51,064 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:04:51,075 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:04:51,076 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:04:51,078 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:04:51,080 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:04:51,082 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:04:51,084 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:04:51,086 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:04:51,089 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:04:51,090 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:04:51,096 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:04:51,101 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:04:51,105 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:04:51,107 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:04:51,109 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:04:51,112 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:04:51,118 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:04:51,118 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:04:51,119 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:04:51,121 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:04:51,121 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:04:51,122 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:04:51,123 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:04:51,124 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:04:51,126 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:04:51,127 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:04:51,128 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:04:51,128 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:04:51,129 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:04:51,130 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:04:51,130 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:04:51,132 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:04:51,132 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:04:51,133 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-25 18:04:51,196 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:04:51,196 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:04:51,197 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:04:51,198 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:04:51,198 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:04:51,199 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:04:51,199 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:04:51,199 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:04:51,200 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:04:51,200 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:04:51,201 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:04:51,201 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:04:51,203 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-25 18:04:51,203 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-25 18:04:51,204 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:04:51,204 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:04:51,204 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 18:04:51,205 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:04:51,205 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:04:51,205 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:04:51,206 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-25 18:04:51,206 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-25 18:04:51,206 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-25 18:04:51,206 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:04:51,207 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 18:04:51,207 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-25 18:04:51,207 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-25 18:04:51,208 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:04:51,208 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:04:51,208 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:04:51,209 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-25 18:04:51,209 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:04:51,209 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:04:51,210 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:04:51,210 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:04:51,211 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-25 18:04:51,211 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-25 18:04:51,211 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:04:51,212 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:04:51,212 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_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b81f923e96224472f8219a473f794261ff02356a47c6b09b527f0fc600725a8 [2021-11-25 18:04:51,614 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:04:51,655 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:04:51,658 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:04:51,659 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:04:51,660 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:04:51,661 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/list-simple/dll2c_insert_unequal.i [2021-11-25 18:04:51,747 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/data/3de776fe9/ad9d63684e5c46afb332048749e5f639/FLAG49025c105 [2021-11-25 18:04:52,511 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:04:52,517 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/sv-benchmarks/c/list-simple/dll2c_insert_unequal.i [2021-11-25 18:04:52,535 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/data/3de776fe9/ad9d63684e5c46afb332048749e5f639/FLAG49025c105 [2021-11-25 18:04:52,756 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/data/3de776fe9/ad9d63684e5c46afb332048749e5f639 [2021-11-25 18:04:52,759 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:04:52,761 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:04:52,765 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:04:52,765 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:04:52,770 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:04:52,771 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:04:52" (1/1) ... [2021-11-25 18:04:52,772 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dde7ce2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:04:52, skipping insertion in model container [2021-11-25 18:04:52,772 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:04:52" (1/1) ... [2021-11-25 18:04:52,782 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:04:52,853 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:04:53,267 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_4d341d8c-8e35-44c3-b072-133fb14b84bc/sv-benchmarks/c/list-simple/dll2c_insert_unequal.i[25148,25161] [2021-11-25 18:04:53,274 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:04:53,298 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:04:53,399 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_4d341d8c-8e35-44c3-b072-133fb14b84bc/sv-benchmarks/c/list-simple/dll2c_insert_unequal.i[25148,25161] [2021-11-25 18:04:53,401 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:04:53,445 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:04:53,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:04:53 WrapperNode [2021-11-25 18:04:53,446 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:04:53,447 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:04:53,447 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:04:53,448 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:04:53,455 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:04:53" (1/1) ... [2021-11-25 18:04:53,477 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:04:53" (1/1) ... [2021-11-25 18:04:53,512 INFO L137 Inliner]: procedures = 130, calls = 58, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 192 [2021-11-25 18:04:53,513 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:04:53,514 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:04:53,514 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:04:53,514 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:04:53,524 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:04:53" (1/1) ... [2021-11-25 18:04:53,524 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:04:53" (1/1) ... [2021-11-25 18:04:53,530 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:04:53" (1/1) ... [2021-11-25 18:04:53,530 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:04:53" (1/1) ... [2021-11-25 18:04:53,562 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:04:53" (1/1) ... [2021-11-25 18:04:53,568 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:04:53" (1/1) ... [2021-11-25 18:04:53,571 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:04:53" (1/1) ... [2021-11-25 18:04:53,588 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:04:53,589 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:04:53,589 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:04:53,589 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:04:53,590 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:04:53" (1/1) ... [2021-11-25 18:04:53,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:04:53,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:04:53,628 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:04:53,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:04:53,675 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-25 18:04:53,676 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-11-25 18:04:53,676 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-11-25 18:04:53,676 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 18:04:53,676 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:04:53,677 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 18:04:53,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 18:04:53,677 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 18:04:53,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 18:04:53,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-25 18:04:53,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 18:04:53,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-25 18:04:53,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:04:53,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:04:53,828 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:04:53,830 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:04:54,892 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:04:54,901 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:04:54,901 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-25 18:04:54,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:04:54 BoogieIcfgContainer [2021-11-25 18:04:54,904 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:04:54,906 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:04:54,906 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:04:54,909 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:04:54,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:04:52" (1/3) ... [2021-11-25 18:04:54,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70ef6cf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:04:54, skipping insertion in model container [2021-11-25 18:04:54,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:04:53" (2/3) ... [2021-11-25 18:04:54,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70ef6cf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:04:54, skipping insertion in model container [2021-11-25 18:04:54,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:04:54" (3/3) ... [2021-11-25 18:04:54,913 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2c_insert_unequal.i [2021-11-25 18:04:54,919 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:04:54,920 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 82 error locations. [2021-11-25 18:04:54,971 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:04:54,987 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2021-11-25 18:04:54,987 INFO L340 AbstractCegarLoop]: Starting to check reachability of 82 error locations. [2021-11-25 18:04:55,014 INFO L276 IsEmpty]: Start isEmpty. Operand has 174 states, 87 states have (on average 2.160919540229885) internal successors, (188), 169 states have internal predecessors, (188), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:04:55,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 18:04:55,023 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:04:55,024 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 18:04:55,024 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 78 more)] === [2021-11-25 18:04:55,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:04:55,035 INFO L85 PathProgramCache]: Analyzing trace with hash 897735090, now seen corresponding path program 1 times [2021-11-25 18:04:55,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:04:55,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [324883785] [2021-11-25 18:04:55,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:04:55,053 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:04:55,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:04:55,059 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:04:55,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-25 18:04:55,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:04:55,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:04:55,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:04:55,355 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:04:55,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:04:55,380 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:04:55,381 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:04:55,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [324883785] [2021-11-25 18:04:55,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [324883785] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:04:55,383 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:04:55,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:04:55,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248685562] [2021-11-25 18:04:55,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:04:55,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:04:55,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:04:55,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:04:55,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:04:55,436 INFO L87 Difference]: Start difference. First operand has 174 states, 87 states have (on average 2.160919540229885) internal successors, (188), 169 states have internal predecessors, (188), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:04:55,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:04:55,907 INFO L93 Difference]: Finished difference Result 171 states and 185 transitions. [2021-11-25 18:04:55,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:04:55,910 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-25 18:04:55,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:04:55,930 INFO L225 Difference]: With dead ends: 171 [2021-11-25 18:04:55,930 INFO L226 Difference]: Without dead ends: 168 [2021-11-25 18:04:55,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:04:55,938 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 10 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:04:55,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 269 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 18:04:55,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-11-25 18:04:55,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2021-11-25 18:04:55,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 85 states have (on average 2.0588235294117645) internal successors, (175), 163 states have internal predecessors, (175), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:04:55,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 181 transitions. [2021-11-25 18:04:55,998 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 181 transitions. Word has length 6 [2021-11-25 18:04:55,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:04:55,999 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 181 transitions. [2021-11-25 18:04:55,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:04:55,999 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 181 transitions. [2021-11-25 18:04:56,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 18:04:56,000 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:04:56,000 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 18:04:56,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:04:56,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:04:56,213 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 78 more)] === [2021-11-25 18:04:56,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:04:56,217 INFO L85 PathProgramCache]: Analyzing trace with hash 897735091, now seen corresponding path program 1 times [2021-11-25 18:04:56,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:04:56,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1982442559] [2021-11-25 18:04:56,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:04:56,221 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:04:56,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:04:56,223 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:04:56,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-25 18:04:56,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:04:56,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 18:04:56,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:04:56,342 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:04:56,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:04:56,375 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:04:56,375 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:04:56,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1982442559] [2021-11-25 18:04:56,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1982442559] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:04:56,383 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:04:56,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:04:56,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617085685] [2021-11-25 18:04:56,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:04:56,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:04:56,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:04:56,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:04:56,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:04:56,406 INFO L87 Difference]: Start difference. First operand 168 states and 181 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:04:57,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:04:57,011 INFO L93 Difference]: Finished difference Result 165 states and 178 transitions. [2021-11-25 18:04:57,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:04:57,013 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-25 18:04:57,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:04:57,015 INFO L225 Difference]: With dead ends: 165 [2021-11-25 18:04:57,016 INFO L226 Difference]: Without dead ends: 165 [2021-11-25 18:04:57,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:04:57,017 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 5 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:04:57,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 271 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 18:04:57,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-25 18:04:57,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2021-11-25 18:04:57,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 85 states have (on average 2.023529411764706) internal successors, (172), 160 states have internal predecessors, (172), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:04:57,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 178 transitions. [2021-11-25 18:04:57,062 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 178 transitions. Word has length 6 [2021-11-25 18:04:57,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:04:57,062 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 178 transitions. [2021-11-25 18:04:57,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:04:57,063 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 178 transitions. [2021-11-25 18:04:57,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-25 18:04:57,064 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:04:57,065 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:04:57,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-25 18:04:57,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:04:57,277 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 78 more)] === [2021-11-25 18:04:57,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:04:57,278 INFO L85 PathProgramCache]: Analyzing trace with hash 165946077, now seen corresponding path program 1 times [2021-11-25 18:04:57,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:04:57,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1268133637] [2021-11-25 18:04:57,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:04:57,279 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:04:57,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:04:57,281 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:04:57,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-25 18:04:57,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:04:57,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 18:04:57,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:04:57,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:04:57,462 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:04:57,462 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:04:57,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1268133637] [2021-11-25 18:04:57,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1268133637] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:04:57,463 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:04:57,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:04:57,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126185509] [2021-11-25 18:04:57,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:04:57,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:04:57,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:04:57,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:04:57,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:04:57,469 INFO L87 Difference]: Start difference. First operand 165 states and 178 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:04:57,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:04:57,493 INFO L93 Difference]: Finished difference Result 176 states and 191 transitions. [2021-11-25 18:04:57,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:04:57,494 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-11-25 18:04:57,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:04:57,497 INFO L225 Difference]: With dead ends: 176 [2021-11-25 18:04:57,500 INFO L226 Difference]: Without dead ends: 176 [2021-11-25 18:04:57,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:04:57,502 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 10 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:04:57,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 349 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:04:57,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-11-25 18:04:57,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 166. [2021-11-25 18:04:57,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 86 states have (on average 2.011627906976744) internal successors, (173), 161 states have internal predecessors, (173), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:04:57,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 179 transitions. [2021-11-25 18:04:57,530 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 179 transitions. Word has length 14 [2021-11-25 18:04:57,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:04:57,530 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 179 transitions. [2021-11-25 18:04:57,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:04:57,531 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 179 transitions. [2021-11-25 18:04:57,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-25 18:04:57,532 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:04:57,532 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:04:57,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-25 18:04:57,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:04:57,745 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 78 more)] === [2021-11-25 18:04:57,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:04:57,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1886331456, now seen corresponding path program 1 times [2021-11-25 18:04:57,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:04:57,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1973172058] [2021-11-25 18:04:57,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:04:57,747 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:04:57,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:04:57,748 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:04:57,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-25 18:04:57,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:04:57,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 18:04:57,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:04:57,943 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:04:58,010 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:04:58,010 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:04:58,010 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:04:58,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1973172058] [2021-11-25 18:04:58,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1973172058] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:04:58,011 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:04:58,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:04:58,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863074744] [2021-11-25 18:04:58,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:04:58,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:04:58,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:04:58,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:04:58,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:04:58,014 INFO L87 Difference]: Start difference. First operand 166 states and 179 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 18:04:58,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:04:58,894 INFO L93 Difference]: Finished difference Result 166 states and 180 transitions. [2021-11-25 18:04:58,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:04:58,896 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-11-25 18:04:58,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:04:58,898 INFO L225 Difference]: With dead ends: 166 [2021-11-25 18:04:58,899 INFO L226 Difference]: Without dead ends: 166 [2021-11-25 18:04:58,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:04:58,900 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 20 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:04:58,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 514 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-25 18:04:58,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-25 18:04:58,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 165. [2021-11-25 18:04:58,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 86 states have (on average 2.0) internal successors, (172), 160 states have internal predecessors, (172), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:04:58,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 178 transitions. [2021-11-25 18:04:58,915 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 178 transitions. Word has length 24 [2021-11-25 18:04:58,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:04:58,916 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 178 transitions. [2021-11-25 18:04:58,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 18:04:58,917 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 178 transitions. [2021-11-25 18:04:58,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-25 18:04:58,917 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:04:58,918 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:04:58,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-25 18:04:59,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:04:59,130 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 78 more)] === [2021-11-25 18:04:59,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:04:59,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1886331457, now seen corresponding path program 1 times [2021-11-25 18:04:59,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:04:59,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [298097954] [2021-11-25 18:04:59,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:04:59,133 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:04:59,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:04:59,134 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:04:59,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-25 18:04:59,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:04:59,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 18:04:59,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:04:59,313 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:04:59,437 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:04:59,437 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:04:59,438 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:04:59,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [298097954] [2021-11-25 18:04:59,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [298097954] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:04:59,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:04:59,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:04:59,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728003932] [2021-11-25 18:04:59,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:04:59,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:04:59,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:04:59,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:04:59,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:04:59,441 INFO L87 Difference]: Start difference. First operand 165 states and 178 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 18:05:00,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:05:00,398 INFO L93 Difference]: Finished difference Result 165 states and 179 transitions. [2021-11-25 18:05:00,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:05:00,399 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-11-25 18:05:00,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:05:00,400 INFO L225 Difference]: With dead ends: 165 [2021-11-25 18:05:00,400 INFO L226 Difference]: Without dead ends: 165 [2021-11-25 18:05:00,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:05:00,401 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 19 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-25 18:05:00,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 538 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-25 18:05:00,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-25 18:05:00,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2021-11-25 18:05:00,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 86 states have (on average 1.9883720930232558) internal successors, (171), 159 states have internal predecessors, (171), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:05:00,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 177 transitions. [2021-11-25 18:05:00,413 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 177 transitions. Word has length 24 [2021-11-25 18:05:00,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:05:00,413 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 177 transitions. [2021-11-25 18:05:00,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 18:05:00,414 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 177 transitions. [2021-11-25 18:05:00,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-25 18:05:00,415 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:05:00,415 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:05:00,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-25 18:05:00,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:05:00,628 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 78 more)] === [2021-11-25 18:05:00,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:05:00,629 INFO L85 PathProgramCache]: Analyzing trace with hash 288330017, now seen corresponding path program 1 times [2021-11-25 18:05:00,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:05:00,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [96004372] [2021-11-25 18:05:00,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:05:00,629 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:05:00,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:05:00,633 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:05:00,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-25 18:05:00,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:05:00,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 18:05:00,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:05:00,818 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:05:01,070 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 18:05:01,071 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 24 treesize of output 31 [2021-11-25 18:05:01,110 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:05:01,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:05:01,580 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:05:01,581 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:05:01,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [96004372] [2021-11-25 18:05:01,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [96004372] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:05:01,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [517836670] [2021-11-25 18:05:01,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:05:01,582 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:05:01,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:05:01,585 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:05:01,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-25 18:05:01,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:05:01,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-25 18:05:01,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:05:01,875 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:05:06,136 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-25 18:05:06,136 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 17 treesize of output 22 [2021-11-25 18:05:06,219 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:05:06,220 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:05:06,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [517836670] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:05:06,220 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:05:06,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 6] total 11 [2021-11-25 18:05:06,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211014720] [2021-11-25 18:05:06,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:05:06,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 18:05:06,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:05:06,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 18:05:06,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=102, Unknown=2, NotChecked=0, Total=132 [2021-11-25 18:05:06,222 INFO L87 Difference]: Start difference. First operand 164 states and 177 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:05:07,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:05:07,127 INFO L93 Difference]: Finished difference Result 171 states and 186 transitions. [2021-11-25 18:05:07,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 18:05:07,128 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2021-11-25 18:05:07,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:05:07,130 INFO L225 Difference]: With dead ends: 171 [2021-11-25 18:05:07,130 INFO L226 Difference]: Without dead ends: 171 [2021-11-25 18:05:07,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 57 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=28, Invalid=102, Unknown=2, NotChecked=0, Total=132 [2021-11-25 18:05:07,131 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 5 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-25 18:05:07,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 661 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 418 Invalid, 0 Unknown, 111 Unchecked, 0.9s Time] [2021-11-25 18:05:07,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-25 18:05:07,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 169. [2021-11-25 18:05:07,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 90 states have (on average 1.9666666666666666) internal successors, (177), 163 states have internal predecessors, (177), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-25 18:05:07,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 185 transitions. [2021-11-25 18:05:07,154 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 185 transitions. Word has length 26 [2021-11-25 18:05:07,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:05:07,155 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 185 transitions. [2021-11-25 18:05:07,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:05:07,155 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 185 transitions. [2021-11-25 18:05:07,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-25 18:05:07,157 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:05:07,157 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:05:07,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-25 18:05:07,376 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2021-11-25 18:05:07,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 18:05:07,575 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 78 more)] === [2021-11-25 18:05:07,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:05:07,575 INFO L85 PathProgramCache]: Analyzing trace with hash 288330018, now seen corresponding path program 1 times [2021-11-25 18:05:07,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:05:07,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1952323008] [2021-11-25 18:05:07,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:05:07,576 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:05:07,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:05:07,578 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:05:07,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-25 18:05:07,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:05:07,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-25 18:05:07,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:05:07,810 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:05:07,819 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:05:10,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:10,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 18:05:10,259 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:05:10,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-11-25 18:05:10,325 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:05:10,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:05:10,734 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:05:10,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1952323008] [2021-11-25 18:05:10,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1952323008] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:05:10,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1028254285] [2021-11-25 18:05:10,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:05:10,735 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:05:10,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:05:10,735 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:05:10,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-25 18:05:11,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:05:11,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-25 18:05:11,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:05:11,098 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:05:11,106 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:05:11,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:11,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 18:05:11,429 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:05:11,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-11-25 18:05:11,462 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:05:11,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:05:11,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1028254285] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:05:11,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276885388] [2021-11-25 18:05:11,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:05:11,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:05:11,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:05:11,790 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:05:11,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 18:05:11,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:05:11,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-25 18:05:11,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:05:11,923 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:05:14,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:14,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 18:05:14,262 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:05:14,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-11-25 18:05:14,293 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:05:14,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:05:14,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276885388] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:05:14,571 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:05:14,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 9 [2021-11-25 18:05:14,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926282960] [2021-11-25 18:05:14,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:05:14,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 18:05:14,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:05:14,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 18:05:14,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=105, Unknown=1, NotChecked=0, Total=132 [2021-11-25 18:05:14,573 INFO L87 Difference]: Start difference. First operand 169 states and 185 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:05:16,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:05:16,366 INFO L93 Difference]: Finished difference Result 171 states and 186 transitions. [2021-11-25 18:05:16,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 18:05:16,366 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2021-11-25 18:05:16,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:05:16,368 INFO L225 Difference]: With dead ends: 171 [2021-11-25 18:05:16,368 INFO L226 Difference]: Without dead ends: 171 [2021-11-25 18:05:16,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 75 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=35, Invalid=146, Unknown=1, NotChecked=0, Total=182 [2021-11-25 18:05:16,370 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 2 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:05:16,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 717 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 722 Invalid, 0 Unknown, 101 Unchecked, 1.7s Time] [2021-11-25 18:05:16,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-25 18:05:16,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 169. [2021-11-25 18:05:16,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 90 states have (on average 1.9555555555555555) internal successors, (176), 163 states have internal predecessors, (176), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-25 18:05:16,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 184 transitions. [2021-11-25 18:05:16,378 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 184 transitions. Word has length 26 [2021-11-25 18:05:16,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:05:16,378 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 184 transitions. [2021-11-25 18:05:16,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:05:16,379 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 184 transitions. [2021-11-25 18:05:16,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-25 18:05:16,380 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:05:16,380 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:05:16,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 18:05:16,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-25 18:05:16,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-25 18:05:16,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:05:16,998 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 78 more)] === [2021-11-25 18:05:16,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:05:16,999 INFO L85 PathProgramCache]: Analyzing trace with hash -2087573769, now seen corresponding path program 1 times [2021-11-25 18:05:16,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:05:16,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1219273404] [2021-11-25 18:05:17,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:05:17,000 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:05:17,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:05:17,001 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:05:17,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-25 18:05:17,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:05:17,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 18:05:17,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:05:17,253 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:05:17,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:05:17,353 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:05:17,354 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:05:17,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1219273404] [2021-11-25 18:05:17,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1219273404] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:05:17,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2048445943] [2021-11-25 18:05:17,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:05:17,354 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:05:17,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:05:17,365 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:05:17,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-25 18:05:17,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:05:17,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 18:05:17,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:05:17,654 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:05:17,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:05:17,742 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:05:17,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2048445943] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:05:17,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446457082] [2021-11-25 18:05:17,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:05:17,743 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:05:17,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:05:17,744 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:05:17,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-25 18:05:17,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:05:17,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 18:05:17,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:05:17,957 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:05:17,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:05:18,046 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:05:18,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446457082] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:05:18,046 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 18:05:18,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 6 [2021-11-25 18:05:18,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440090865] [2021-11-25 18:05:18,047 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 18:05:18,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:05:18,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:05:18,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:05:18,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:05:18,051 INFO L87 Difference]: Start difference. First operand 169 states and 184 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:05:18,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:05:18,243 INFO L93 Difference]: Finished difference Result 170 states and 184 transitions. [2021-11-25 18:05:18,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:05:18,245 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2021-11-25 18:05:18,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:05:18,247 INFO L225 Difference]: With dead ends: 170 [2021-11-25 18:05:18,247 INFO L226 Difference]: Without dead ends: 170 [2021-11-25 18:05:18,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:05:18,248 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 4 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 824 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:05:18,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 824 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:05:18,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-25 18:05:18,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2021-11-25 18:05:18,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 90 states have (on average 1.9444444444444444) internal successors, (175), 163 states have internal predecessors, (175), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-25 18:05:18,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 183 transitions. [2021-11-25 18:05:18,256 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 183 transitions. Word has length 28 [2021-11-25 18:05:18,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:05:18,256 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 183 transitions. [2021-11-25 18:05:18,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:05:18,257 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 183 transitions. [2021-11-25 18:05:18,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-25 18:05:18,258 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:05:18,258 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:05:18,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-25 18:05:18,493 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-11-25 18:05:18,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-25 18:05:18,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 18:05:18,865 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 78 more)] === [2021-11-25 18:05:18,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:05:18,866 INFO L85 PathProgramCache]: Analyzing trace with hash -295058062, now seen corresponding path program 1 times [2021-11-25 18:05:18,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:05:18,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1334413594] [2021-11-25 18:05:18,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:05:18,867 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:05:18,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:05:18,868 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:05:18,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-25 18:05:19,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:05:19,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:05:19,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:05:19,112 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 18:05:19,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:05:19,143 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 18:05:19,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 18:05:19,199 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 18:05:19,199 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:05:19,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1334413594] [2021-11-25 18:05:19,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1334413594] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:05:19,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1502411141] [2021-11-25 18:05:19,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:05:19,200 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:05:19,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:05:19,201 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:05:19,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-25 18:05:19,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:05:19,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 18:05:19,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:05:19,567 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 18:05:19,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:05:19,596 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 18:05:19,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 18:05:19,666 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 18:05:19,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1502411141] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:05:19,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881073672] [2021-11-25 18:05:19,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:05:19,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:05:19,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:05:19,668 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:05:19,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-25 18:05:19,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:05:19,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:05:19,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:05:19,862 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 18:05:19,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:05:19,886 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 18:05:19,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 18:05:19,941 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 18:05:19,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881073672] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:05:19,942 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 18:05:19,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 3 [2021-11-25 18:05:19,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344255930] [2021-11-25 18:05:19,942 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 18:05:19,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:05:19,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:05:19,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:05:19,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:05:19,945 INFO L87 Difference]: Start difference. First operand 169 states and 183 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:05:20,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:05:20,312 INFO L93 Difference]: Finished difference Result 174 states and 190 transitions. [2021-11-25 18:05:20,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:05:20,312 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2021-11-25 18:05:20,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:05:20,314 INFO L225 Difference]: With dead ends: 174 [2021-11-25 18:05:20,314 INFO L226 Difference]: Without dead ends: 174 [2021-11-25 18:05:20,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 163 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:05:20,315 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 9 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:05:20,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 422 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 18:05:20,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-11-25 18:05:20,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2021-11-25 18:05:20,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 93 states have (on average 1.935483870967742) internal successors, (180), 166 states have internal predecessors, (180), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-25 18:05:20,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 188 transitions. [2021-11-25 18:05:20,322 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 188 transitions. Word has length 29 [2021-11-25 18:05:20,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:05:20,322 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 188 transitions. [2021-11-25 18:05:20,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:05:20,323 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 188 transitions. [2021-11-25 18:05:20,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-25 18:05:20,324 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:05:20,324 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:05:20,340 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2021-11-25 18:05:20,538 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-25 18:05:20,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-25 18:05:20,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:05:20,927 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 78 more)] === [2021-11-25 18:05:20,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:05:20,928 INFO L85 PathProgramCache]: Analyzing trace with hash -295058061, now seen corresponding path program 1 times [2021-11-25 18:05:20,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:05:20,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1661720273] [2021-11-25 18:05:20,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:05:20,929 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:05:20,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:05:20,929 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:05:20,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-25 18:05:21,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:05:21,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 18:05:21,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:05:21,243 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:05:21,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:05:21,333 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:05:21,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2021-11-25 18:05:22,018 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:05:22,018 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:05:22,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1661720273] [2021-11-25 18:05:22,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1661720273] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:05:22,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1526939430] [2021-11-25 18:05:22,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:05:22,019 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:05:22,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:05:22,025 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:05:22,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-25 18:05:22,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:05:22,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 18:05:22,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:05:22,424 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:05:22,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:05:22,497 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:05:22,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2021-11-25 18:05:22,907 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:05:22,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1526939430] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:05:22,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97379303] [2021-11-25 18:05:22,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:05:22,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:05:22,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:05:22,909 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:05:22,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-25 18:05:23,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:05:23,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 18:05:23,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:05:23,197 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:05:23,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:05:23,253 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:05:23,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2021-11-25 18:05:23,585 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:05:23,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97379303] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:05:23,586 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 18:05:23,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 11 [2021-11-25 18:05:23,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287249377] [2021-11-25 18:05:23,587 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 18:05:23,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 18:05:23,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:05:23,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 18:05:23,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-25 18:05:23,589 INFO L87 Difference]: Start difference. First operand 172 states and 188 transitions. Second operand has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-25 18:05:24,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:05:24,765 INFO L93 Difference]: Finished difference Result 179 states and 196 transitions. [2021-11-25 18:05:24,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 18:05:24,766 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2021-11-25 18:05:24,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:05:24,768 INFO L225 Difference]: With dead ends: 179 [2021-11-25 18:05:24,768 INFO L226 Difference]: Without dead ends: 179 [2021-11-25 18:05:24,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-11-25 18:05:24,770 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 18 mSDsluCounter, 846 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 1015 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:05:24,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 1015 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-25 18:05:24,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-11-25 18:05:24,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 172. [2021-11-25 18:05:24,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 93 states have (on average 1.924731182795699) internal successors, (179), 166 states have internal predecessors, (179), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-25 18:05:24,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 187 transitions. [2021-11-25 18:05:24,777 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 187 transitions. Word has length 29 [2021-11-25 18:05:24,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:05:24,778 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 187 transitions. [2021-11-25 18:05:24,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-25 18:05:24,778 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 187 transitions. [2021-11-25 18:05:24,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-25 18:05:24,779 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:05:24,780 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:05:24,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-25 18:05:25,007 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2021-11-25 18:05:25,218 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-25 18:05:25,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:05:25,406 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 78 more)] === [2021-11-25 18:05:25,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:05:25,406 INFO L85 PathProgramCache]: Analyzing trace with hash -556865325, now seen corresponding path program 1 times [2021-11-25 18:05:25,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:05:25,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [497598486] [2021-11-25 18:05:25,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:05:25,407 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:05:25,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:05:25,408 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:05:25,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-25 18:05:25,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:05:25,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 18:05:25,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:05:25,616 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:05:25,698 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:05:25,698 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:05:25,698 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:05:25,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [497598486] [2021-11-25 18:05:25,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [497598486] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:05:25,698 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:05:25,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 18:05:25,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284281670] [2021-11-25 18:05:25,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:05:25,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:05:25,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:05:25,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:05:25,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:05:25,701 INFO L87 Difference]: Start difference. First operand 172 states and 187 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 18:05:26,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:05:26,512 INFO L93 Difference]: Finished difference Result 172 states and 187 transitions. [2021-11-25 18:05:26,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:05:26,513 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2021-11-25 18:05:26,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:05:26,515 INFO L225 Difference]: With dead ends: 172 [2021-11-25 18:05:26,515 INFO L226 Difference]: Without dead ends: 172 [2021-11-25 18:05:26,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-25 18:05:26,516 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 22 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:05:26,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 586 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-25 18:05:26,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-25 18:05:26,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 171. [2021-11-25 18:05:26,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 93 states have (on average 1.913978494623656) internal successors, (178), 165 states have internal predecessors, (178), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-25 18:05:26,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 186 transitions. [2021-11-25 18:05:26,523 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 186 transitions. Word has length 30 [2021-11-25 18:05:26,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:05:26,524 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 186 transitions. [2021-11-25 18:05:26,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 18:05:26,524 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 186 transitions. [2021-11-25 18:05:26,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-25 18:05:26,525 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:05:26,525 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:05:26,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-25 18:05:26,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:05:26,738 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 78 more)] === [2021-11-25 18:05:26,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:05:26,738 INFO L85 PathProgramCache]: Analyzing trace with hash -556865324, now seen corresponding path program 1 times [2021-11-25 18:05:26,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:05:26,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [104289972] [2021-11-25 18:05:26,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:05:26,739 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:05:26,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:05:26,740 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:05:26,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-25 18:05:26,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:05:26,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 18:05:26,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:05:26,927 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:05:27,062 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:05:27,063 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:05:27,063 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:05:27,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [104289972] [2021-11-25 18:05:27,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [104289972] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:05:27,063 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:05:27,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 18:05:27,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007081677] [2021-11-25 18:05:27,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:05:27,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:05:27,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:05:27,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:05:27,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:05:27,065 INFO L87 Difference]: Start difference. First operand 171 states and 186 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 18:05:28,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:05:28,064 INFO L93 Difference]: Finished difference Result 170 states and 185 transitions. [2021-11-25 18:05:28,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:05:28,065 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2021-11-25 18:05:28,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:05:28,067 INFO L225 Difference]: With dead ends: 170 [2021-11-25 18:05:28,067 INFO L226 Difference]: Without dead ends: 170 [2021-11-25 18:05:28,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-25 18:05:28,068 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 20 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:05:28,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 616 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-25 18:05:28,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-25 18:05:28,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2021-11-25 18:05:28,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 93 states have (on average 1.903225806451613) internal successors, (177), 164 states have internal predecessors, (177), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-25 18:05:28,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 185 transitions. [2021-11-25 18:05:28,076 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 185 transitions. Word has length 30 [2021-11-25 18:05:28,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:05:28,077 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 185 transitions. [2021-11-25 18:05:28,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 18:05:28,078 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 185 transitions. [2021-11-25 18:05:28,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-25 18:05:28,079 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:05:28,079 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:05:28,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-25 18:05:28,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:05:28,294 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 78 more)] === [2021-11-25 18:05:28,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:05:28,294 INFO L85 PathProgramCache]: Analyzing trace with hash 311753782, now seen corresponding path program 1 times [2021-11-25 18:05:28,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:05:28,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1942443610] [2021-11-25 18:05:28,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:05:28,295 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:05:28,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:05:28,296 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:05:28,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-25 18:05:28,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:05:28,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 18:05:28,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:05:28,591 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 18:05:28,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:05:28,698 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-25 18:05:28,699 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:05:28,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1942443610] [2021-11-25 18:05:28,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1942443610] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:05:28,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1819134298] [2021-11-25 18:05:28,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:05:28,700 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:05:28,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:05:28,713 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:05:28,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-25 18:05:29,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:05:29,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 18:05:29,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:05:29,108 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 18:05:29,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:05:29,211 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-25 18:05:29,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1819134298] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:05:29,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866878981] [2021-11-25 18:05:29,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:05:29,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:05:29,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:05:29,213 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:05:29,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-25 18:05:29,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:05:29,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 18:05:29,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:05:29,471 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 18:05:29,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:05:29,553 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-25 18:05:29,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866878981] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:05:29,554 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 18:05:29,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 6 [2021-11-25 18:05:29,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411157490] [2021-11-25 18:05:29,554 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 18:05:29,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:05:29,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:05:29,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:05:29,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:05:29,556 INFO L87 Difference]: Start difference. First operand 170 states and 185 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-25 18:05:29,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:05:29,594 INFO L93 Difference]: Finished difference Result 158 states and 169 transitions. [2021-11-25 18:05:29,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:05:29,595 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2021-11-25 18:05:29,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:05:29,596 INFO L225 Difference]: With dead ends: 158 [2021-11-25 18:05:29,597 INFO L226 Difference]: Without dead ends: 158 [2021-11-25 18:05:29,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:05:29,598 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 147 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:05:29,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 366 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:05:29,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-25 18:05:29,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2021-11-25 18:05:29,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 86 states have (on average 1.8953488372093024) internal successors, (163), 153 states have internal predecessors, (163), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:05:29,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 169 transitions. [2021-11-25 18:05:29,605 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 169 transitions. Word has length 41 [2021-11-25 18:05:29,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:05:29,605 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 169 transitions. [2021-11-25 18:05:29,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-25 18:05:29,606 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 169 transitions. [2021-11-25 18:05:29,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-25 18:05:29,607 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:05:29,607 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:05:29,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-25 18:05:29,822 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (24)] Ended with exit code 0 [2021-11-25 18:05:30,043 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-11-25 18:05:30,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:05:30,220 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 78 more)] === [2021-11-25 18:05:30,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:05:30,221 INFO L85 PathProgramCache]: Analyzing trace with hash -670127466, now seen corresponding path program 1 times [2021-11-25 18:05:30,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:05:30,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [612793563] [2021-11-25 18:05:30,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:05:30,222 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:05:30,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:05:30,222 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:05:30,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-25 18:05:30,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:05:30,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-25 18:05:30,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:05:30,564 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:05:30,582 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 9 treesize of output 7 [2021-11-25 18:05:30,751 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 18:05:30,752 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 21 treesize of output 28 [2021-11-25 18:05:30,798 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 10 treesize of output 8 [2021-11-25 18:05:30,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:30,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-11-25 18:05:31,335 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-25 18:05:31,336 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 25 [2021-11-25 18:05:31,404 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:05:31,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:05:31,843 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:05:31,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [612793563] [2021-11-25 18:05:31,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [612793563] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:05:31,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [498584954] [2021-11-25 18:05:31,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:05:31,843 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:05:31,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:05:31,844 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:05:31,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-25 18:05:32,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:05:32,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-25 18:05:32,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:05:32,265 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-25 18:05:32,266 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 15 treesize of output 20 [2021-11-25 18:05:32,318 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:05:32,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 18 [2021-11-25 18:05:32,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:32,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:32,481 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-11-25 18:05:32,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 41 [2021-11-25 18:05:32,947 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:05:32,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 30 [2021-11-25 18:05:33,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:33,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:33,350 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-11-25 18:05:33,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 51 [2021-11-25 18:05:36,089 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:05:36,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 32 [2021-11-25 18:05:36,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:36,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:36,350 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-11-25 18:05:36,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 57 [2021-11-25 18:05:37,511 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 18:05:37,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:05:37,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [498584954] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:05:37,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549617104] [2021-11-25 18:05:37,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:05:37,640 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:05:37,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:05:37,641 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:05:37,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-25 18:05:37,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:05:37,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-25 18:05:37,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:05:37,841 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:05:38,103 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 18:05:38,103 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 23 treesize of output 30 [2021-11-25 18:05:38,501 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-11-25 18:05:38,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 52 [2021-11-25 18:05:39,426 INFO L354 Elim1Store]: treesize reduction 22, result has 43.6 percent of original size [2021-11-25 18:05:39,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 36 [2021-11-25 18:05:39,553 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 18:05:39,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:05:45,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549617104] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:05:45,368 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:05:45,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 14] total 30 [2021-11-25 18:05:45,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010183742] [2021-11-25 18:05:45,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:05:45,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-25 18:05:45,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:05:45,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-25 18:05:45,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1175, Unknown=2, NotChecked=0, Total=1332 [2021-11-25 18:05:45,371 INFO L87 Difference]: Start difference. First operand 158 states and 169 transitions. Second operand has 31 states, 27 states have (on average 3.3703703703703702) internal successors, (91), 25 states have internal predecessors, (91), 8 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-25 18:05:46,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:05:46,670 INFO L93 Difference]: Finished difference Result 175 states and 187 transitions. [2021-11-25 18:05:46,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-25 18:05:46,671 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 27 states have (on average 3.3703703703703702) internal successors, (91), 25 states have internal predecessors, (91), 8 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 43 [2021-11-25 18:05:46,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:05:46,672 INFO L225 Difference]: With dead ends: 175 [2021-11-25 18:05:46,672 INFO L226 Difference]: Without dead ends: 175 [2021-11-25 18:05:46,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 128 SyntacticMatches, 25 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 897 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=257, Invalid=1903, Unknown=2, NotChecked=0, Total=2162 [2021-11-25 18:05:46,674 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 69 mSDsluCounter, 1489 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 1607 SdHoareTripleChecker+Invalid, 1444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1158 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:05:46,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 1607 Invalid, 1444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 281 Invalid, 0 Unknown, 1158 Unchecked, 0.5s Time] [2021-11-25 18:05:46,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-11-25 18:05:46,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 154. [2021-11-25 18:05:46,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 86 states have (on average 1.8488372093023255) internal successors, (159), 149 states have internal predecessors, (159), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:05:46,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 165 transitions. [2021-11-25 18:05:46,680 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 165 transitions. Word has length 43 [2021-11-25 18:05:46,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:05:46,681 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 165 transitions. [2021-11-25 18:05:46,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 27 states have (on average 3.3703703703703702) internal successors, (91), 25 states have internal predecessors, (91), 8 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-25 18:05:46,681 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 165 transitions. [2021-11-25 18:05:46,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-25 18:05:46,682 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:05:46,682 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:05:46,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-25 18:05:46,898 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2021-11-25 18:05:47,116 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-11-25 18:05:47,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:05:47,296 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 78 more)] === [2021-11-25 18:05:47,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:05:47,296 INFO L85 PathProgramCache]: Analyzing trace with hash -670127465, now seen corresponding path program 1 times [2021-11-25 18:05:47,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:05:47,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1342756569] [2021-11-25 18:05:47,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:05:47,297 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:05:47,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:05:47,298 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:05:47,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-25 18:05:47,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:05:47,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-25 18:05:47,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:05:47,739 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:05:47,746 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:05:47,781 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 9 treesize of output 7 [2021-11-25 18:05:47,786 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 5 treesize of output 3 [2021-11-25 18:05:49,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:49,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 18:05:49,977 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:05:49,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-25 18:05:50,046 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 5 treesize of output 3 [2021-11-25 18:05:52,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:52,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 18:05:52,620 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:05:52,620 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 12 treesize of output 18 [2021-11-25 18:05:52,708 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:05:52,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:05:53,003 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:05:53,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1342756569] [2021-11-25 18:05:53,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1342756569] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:05:53,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1438500342] [2021-11-25 18:05:53,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:05:53,004 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:05:53,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:05:53,016 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:05:53,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-25 18:05:53,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:05:53,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-25 18:05:53,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:05:53,465 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:05:53,479 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 5 treesize of output 3 [2021-11-25 18:05:53,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:53,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 18:05:53,764 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 5 treesize of output 3 [2021-11-25 18:05:56,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:56,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 18:05:56,391 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 5 treesize of output 3 [2021-11-25 18:05:56,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:56,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 18:05:56,592 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 18:05:56,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:05:56,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1438500342] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:05:56,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084444610] [2021-11-25 18:05:56,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:05:56,805 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:05:56,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:05:56,806 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:05:56,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-25 18:05:57,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:05:57,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-25 18:05:57,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:05:57,070 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:05:57,079 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:05:57,556 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 18:05:57,557 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 23 treesize of output 30 [2021-11-25 18:05:57,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 18:05:58,152 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-25 18:05:58,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 31 [2021-11-25 18:05:58,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 18:05:58,616 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:05:58,616 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 12 treesize of output 18 [2021-11-25 18:05:58,743 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:05:58,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:05:58,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084444610] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:05:58,946 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:05:58,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 17] total 33 [2021-11-25 18:05:58,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731596162] [2021-11-25 18:05:58,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:05:58,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-25 18:05:58,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:05:58,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-25 18:05:58,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1202, Unknown=3, NotChecked=0, Total=1332 [2021-11-25 18:05:58,949 INFO L87 Difference]: Start difference. First operand 154 states and 165 transitions. Second operand has 34 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 26 states have internal predecessors, (89), 8 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-25 18:06:03,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:06:03,586 INFO L93 Difference]: Finished difference Result 161 states and 171 transitions. [2021-11-25 18:06:03,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-25 18:06:03,586 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 26 states have internal predecessors, (89), 8 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 43 [2021-11-25 18:06:03,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:06:03,588 INFO L225 Difference]: With dead ends: 161 [2021-11-25 18:06:03,588 INFO L226 Difference]: Without dead ends: 161 [2021-11-25 18:06:03,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 99 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=230, Invalid=2022, Unknown=4, NotChecked=0, Total=2256 [2021-11-25 18:06:03,590 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 22 mSDsluCounter, 1203 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 1350 SdHoareTripleChecker+Invalid, 1317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 827 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:06:03,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 1350 Invalid, 1317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 483 Invalid, 0 Unknown, 827 Unchecked, 1.3s Time] [2021-11-25 18:06:03,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-25 18:06:03,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2021-11-25 18:06:03,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 93 states have (on average 1.7741935483870968) internal successors, (165), 155 states have internal predecessors, (165), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:06:03,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 171 transitions. [2021-11-25 18:06:03,596 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 171 transitions. Word has length 43 [2021-11-25 18:06:03,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:06:03,597 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 171 transitions. [2021-11-25 18:06:03,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 26 states have internal predecessors, (89), 8 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-25 18:06:03,597 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 171 transitions. [2021-11-25 18:06:03,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-25 18:06:03,598 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:06:03,598 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:06:03,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-25 18:06:03,815 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2021-11-25 18:06:04,034 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-11-25 18:06:04,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:06:04,212 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 78 more)] === [2021-11-25 18:06:04,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:06:04,213 INFO L85 PathProgramCache]: Analyzing trace with hash -759331621, now seen corresponding path program 1 times [2021-11-25 18:06:04,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:06:04,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1301966050] [2021-11-25 18:06:04,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:06:04,213 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:06:04,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:06:04,214 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:06:04,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-25 18:06:04,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:06:04,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-25 18:06:04,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:06:04,733 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:06:05,167 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 15 [2021-11-25 18:06:05,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:05,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 18:06:05,711 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-11-25 18:06:05,712 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 32 treesize of output 43 [2021-11-25 18:06:05,867 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 36 treesize of output 24 [2021-11-25 18:06:05,979 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:06:05,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:06:06,205 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:06:06,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1301966050] [2021-11-25 18:06:06,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1301966050] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:06:06,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [785283440] [2021-11-25 18:06:06,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:06:06,205 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:06:06,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:06:06,206 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:06:06,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-25 18:06:06,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:06:06,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-25 18:06:06,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:06:06,848 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:06:07,388 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 18 treesize of output 14 [2021-11-25 18:06:07,893 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-11-25 18:06:07,894 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 33 treesize of output 44 [2021-11-25 18:06:07,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:07,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 37 [2021-11-25 18:06:08,060 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 39 treesize of output 27 [2021-11-25 18:06:08,157 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:06:08,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:06:08,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [785283440] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:06:08,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594589571] [2021-11-25 18:06:08,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:06:08,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:06:08,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:06:08,383 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:06:08,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-25 18:06:08,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:06:08,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-25 18:06:08,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:06:09,198 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 21 treesize of output 17 [2021-11-25 18:06:09,572 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-11-25 18:06:09,572 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 31 treesize of output 42 [2021-11-25 18:06:09,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:09,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 35 [2021-11-25 18:06:09,666 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 36 treesize of output 24 [2021-11-25 18:06:09,709 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 18:06:09,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:06:09,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594589571] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:06:09,895 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:06:09,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 35 [2021-11-25 18:06:09,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844793073] [2021-11-25 18:06:09,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:06:09,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-25 18:06:09,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:06:09,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-25 18:06:09,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1232, Unknown=3, NotChecked=0, Total=1406 [2021-11-25 18:06:09,897 INFO L87 Difference]: Start difference. First operand 161 states and 171 transitions. Second operand has 36 states, 32 states have (on average 2.65625) internal successors, (85), 31 states have internal predecessors, (85), 6 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2021-11-25 18:06:12,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:06:12,442 INFO L93 Difference]: Finished difference Result 297 states and 317 transitions. [2021-11-25 18:06:12,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-25 18:06:12,443 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 32 states have (on average 2.65625) internal successors, (85), 31 states have internal predecessors, (85), 6 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) Word has length 46 [2021-11-25 18:06:12,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:06:12,444 INFO L225 Difference]: With dead ends: 297 [2021-11-25 18:06:12,444 INFO L226 Difference]: Without dead ends: 297 [2021-11-25 18:06:12,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 105 SyntacticMatches, 18 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=303, Invalid=2041, Unknown=8, NotChecked=0, Total=2352 [2021-11-25 18:06:12,446 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 184 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 869 SdHoareTripleChecker+Invalid, 1028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 221 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:06:12,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 869 Invalid, 1028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 783 Invalid, 0 Unknown, 221 Unchecked, 1.7s Time] [2021-11-25 18:06:12,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-11-25 18:06:12,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 168. [2021-11-25 18:06:12,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 100 states have (on average 1.82) internal successors, (182), 162 states have internal predecessors, (182), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:06:12,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 188 transitions. [2021-11-25 18:06:12,452 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 188 transitions. Word has length 46 [2021-11-25 18:06:12,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:06:12,453 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 188 transitions. [2021-11-25 18:06:12,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 32 states have (on average 2.65625) internal successors, (85), 31 states have internal predecessors, (85), 6 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2021-11-25 18:06:12,453 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 188 transitions. [2021-11-25 18:06:12,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-25 18:06:12,454 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:06:12,454 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:06:12,482 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-11-25 18:06:12,676 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2021-11-25 18:06:12,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2021-11-25 18:06:13,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 18:06:13,067 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 78 more)] === [2021-11-25 18:06:13,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:06:13,068 INFO L85 PathProgramCache]: Analyzing trace with hash -759331620, now seen corresponding path program 1 times [2021-11-25 18:06:13,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:06:13,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1891225739] [2021-11-25 18:06:13,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:06:13,069 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:06:13,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:06:13,070 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:06:13,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-25 18:06:13,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:06:13,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-25 18:06:13,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:06:13,592 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:06:13,602 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:06:14,143 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 30 treesize of output 22 [2021-11-25 18:06:14,149 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 7 treesize of output 3 [2021-11-25 18:06:14,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:14,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 35 [2021-11-25 18:06:14,835 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-25 18:06:14,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2021-11-25 18:06:14,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-25 18:06:14,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:14,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 18:06:15,033 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 15 treesize of output 7 [2021-11-25 18:06:15,038 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 25 treesize of output 13 [2021-11-25 18:06:15,157 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:06:15,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:06:15,862 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:06:15,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1891225739] [2021-11-25 18:06:15,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1891225739] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:06:15,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1044326635] [2021-11-25 18:06:15,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:06:15,862 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:06:15,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:06:15,863 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:06:15,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-25 18:06:16,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:06:16,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-25 18:06:16,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:06:16,582 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:06:16,601 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:06:17,443 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 29 treesize of output 21 [2021-11-25 18:06:17,449 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 7 treesize of output 3 [2021-11-25 18:06:17,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:17,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 35 [2021-11-25 18:06:17,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:17,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-25 18:06:17,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:17,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 18:06:18,008 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-25 18:06:18,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2021-11-25 18:06:18,192 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 15 treesize of output 7 [2021-11-25 18:06:18,197 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 25 treesize of output 13 [2021-11-25 18:06:18,252 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:06:18,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:06:19,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1044326635] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:06:19,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882396783] [2021-11-25 18:06:19,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:06:19,527 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:06:19,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:06:19,528 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:06:19,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-25 18:06:19,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:06:19,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-25 18:06:19,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:06:19,899 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:06:20,801 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 28 treesize of output 20 [2021-11-25 18:06:20,806 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 7 treesize of output 3 [2021-11-25 18:06:21,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:21,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 36 [2021-11-25 18:06:21,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:21,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-25 18:06:21,263 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-25 18:06:21,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2021-11-25 18:06:21,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:21,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 18:06:21,393 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 15 treesize of output 7 [2021-11-25 18:06:21,398 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 25 treesize of output 13 [2021-11-25 18:06:21,450 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:06:21,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:06:22,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882396783] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:06:22,170 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:06:22,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 18] total 39 [2021-11-25 18:06:22,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540096869] [2021-11-25 18:06:22,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:06:22,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-25 18:06:22,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:06:22,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-25 18:06:22,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1846, Unknown=13, NotChecked=0, Total=2070 [2021-11-25 18:06:22,172 INFO L87 Difference]: Start difference. First operand 168 states and 188 transitions. Second operand has 40 states, 36 states have (on average 2.4166666666666665) internal successors, (87), 33 states have internal predecessors, (87), 6 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2021-11-25 18:06:26,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:06:26,917 INFO L93 Difference]: Finished difference Result 314 states and 333 transitions. [2021-11-25 18:06:26,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-25 18:06:26,918 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 36 states have (on average 2.4166666666666665) internal successors, (87), 33 states have internal predecessors, (87), 6 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) Word has length 46 [2021-11-25 18:06:26,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:06:26,920 INFO L225 Difference]: With dead ends: 314 [2021-11-25 18:06:26,920 INFO L226 Difference]: Without dead ends: 314 [2021-11-25 18:06:26,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 101 SyntacticMatches, 10 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=363, Invalid=2924, Unknown=19, NotChecked=0, Total=3306 [2021-11-25 18:06:26,922 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 202 mSDsluCounter, 1268 mSDsCounter, 0 mSdLazyCounter, 1410 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 1364 SdHoareTripleChecker+Invalid, 1920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 487 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:06:26,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 1364 Invalid, 1920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1410 Invalid, 0 Unknown, 487 Unchecked, 3.3s Time] [2021-11-25 18:06:26,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-11-25 18:06:26,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 168. [2021-11-25 18:06:26,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 100 states have (on average 1.8) internal successors, (180), 162 states have internal predecessors, (180), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:06:26,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 186 transitions. [2021-11-25 18:06:26,929 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 186 transitions. Word has length 46 [2021-11-25 18:06:26,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:06:26,929 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 186 transitions. [2021-11-25 18:06:26,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 36 states have (on average 2.4166666666666665) internal successors, (87), 33 states have internal predecessors, (87), 6 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2021-11-25 18:06:26,930 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 186 transitions. [2021-11-25 18:06:26,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-25 18:06:26,930 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:06:26,931 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:06:26,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2021-11-25 18:06:27,156 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-11-25 18:06:27,344 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2021-11-25 18:06:27,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:06:27,535 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 78 more)] === [2021-11-25 18:06:27,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:06:27,536 INFO L85 PathProgramCache]: Analyzing trace with hash -2064445378, now seen corresponding path program 1 times [2021-11-25 18:06:27,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:06:27,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1977183374] [2021-11-25 18:06:27,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:06:27,536 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:06:27,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:06:27,537 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:06:27,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-25 18:06:27,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:06:27,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 18:06:27,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:06:27,870 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-25 18:06:27,870 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:06:27,870 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:06:27,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1977183374] [2021-11-25 18:06:27,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1977183374] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:06:27,871 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:06:27,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:06:27,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918254290] [2021-11-25 18:06:27,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:06:27,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:06:27,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:06:27,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:06:27,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:06:27,873 INFO L87 Difference]: Start difference. First operand 168 states and 186 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 18:06:27,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:06:27,920 INFO L93 Difference]: Finished difference Result 164 states and 174 transitions. [2021-11-25 18:06:27,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:06:27,921 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2021-11-25 18:06:27,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:06:27,921 INFO L225 Difference]: With dead ends: 164 [2021-11-25 18:06:27,922 INFO L226 Difference]: Without dead ends: 164 [2021-11-25 18:06:27,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:06:27,922 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 142 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:06:27,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 324 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:06:27,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-25 18:06:27,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2021-11-25 18:06:27,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 95 states have (on average 1.7578947368421052) internal successors, (167), 157 states have internal predecessors, (167), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:06:27,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 173 transitions. [2021-11-25 18:06:27,929 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 173 transitions. Word has length 47 [2021-11-25 18:06:27,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:06:27,929 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 173 transitions. [2021-11-25 18:06:27,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 18:06:27,929 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 173 transitions. [2021-11-25 18:06:27,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-25 18:06:27,930 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:06:27,930 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:06:27,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-11-25 18:06:28,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:06:28,143 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 78 more)] === [2021-11-25 18:06:28,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:06:28,143 INFO L85 PathProgramCache]: Analyzing trace with hash 344455491, now seen corresponding path program 1 times [2021-11-25 18:06:28,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:06:28,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [359532330] [2021-11-25 18:06:28,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:06:28,144 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:06:28,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:06:28,145 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:06:28,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-25 18:06:28,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:06:28,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 18:06:28,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:06:28,503 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-25 18:06:28,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:06:29,178 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-25 18:06:29,178 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:06:29,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [359532330] [2021-11-25 18:06:29,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [359532330] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:06:29,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2033549462] [2021-11-25 18:06:29,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:06:29,179 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:06:29,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:06:29,179 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:06:29,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2021-11-25 18:06:29,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:06:29,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 18:06:29,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:06:29,775 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-25 18:06:29,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:06:30,374 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-25 18:06:30,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2033549462] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:06:30,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704462089] [2021-11-25 18:06:30,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:06:30,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:06:30,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:06:30,376 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:06:30,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-25 18:06:30,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:06:30,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 18:06:30,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:06:30,764 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-25 18:06:30,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:06:31,673 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-25 18:06:31,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704462089] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:06:31,673 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 18:06:31,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 6, 6] total 10 [2021-11-25 18:06:31,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139819943] [2021-11-25 18:06:31,674 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 18:06:31,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 18:06:31,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:06:31,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 18:06:31,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-25 18:06:31,675 INFO L87 Difference]: Start difference. First operand 163 states and 173 transitions. Second operand has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 6 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-25 18:06:31,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:06:31,776 INFO L93 Difference]: Finished difference Result 160 states and 169 transitions. [2021-11-25 18:06:31,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:06:31,776 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 6 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 49 [2021-11-25 18:06:31,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:06:31,777 INFO L225 Difference]: With dead ends: 160 [2021-11-25 18:06:31,777 INFO L226 Difference]: Without dead ends: 160 [2021-11-25 18:06:31,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-25 18:06:31,778 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 537 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:06:31,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [538 Valid, 489 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:06:31,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-25 18:06:31,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2021-11-25 18:06:31,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 94 states have (on average 1.7340425531914894) internal successors, (163), 154 states have internal predecessors, (163), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:06:31,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 169 transitions. [2021-11-25 18:06:31,783 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 169 transitions. Word has length 49 [2021-11-25 18:06:31,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:06:31,784 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 169 transitions. [2021-11-25 18:06:31,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 6 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-25 18:06:31,784 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 169 transitions. [2021-11-25 18:06:31,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-25 18:06:31,785 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:06:31,785 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:06:31,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-11-25 18:06:32,001 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (40)] Ended with exit code 0 [2021-11-25 18:06:32,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-25 18:06:32,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:06:32,398 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 78 more)] === [2021-11-25 18:06:32,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:06:32,399 INFO L85 PathProgramCache]: Analyzing trace with hash 2088184022, now seen corresponding path program 1 times [2021-11-25 18:06:32,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:06:32,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1717481752] [2021-11-25 18:06:32,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:06:32,400 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:06:32,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:06:32,400 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:06:32,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-25 18:06:32,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:06:32,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:06:32,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:06:32,738 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-25 18:06:32,739 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:06:32,739 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:06:32,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1717481752] [2021-11-25 18:06:32,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1717481752] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:06:32,739 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:06:32,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:06:32,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830470251] [2021-11-25 18:06:32,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:06:32,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:06:32,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:06:32,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:06:32,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:06:32,744 INFO L87 Difference]: Start difference. First operand 160 states and 169 transitions. Second operand has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 18:06:33,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:06:33,140 INFO L93 Difference]: Finished difference Result 177 states and 187 transitions. [2021-11-25 18:06:33,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:06:33,140 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2021-11-25 18:06:33,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:06:33,142 INFO L225 Difference]: With dead ends: 177 [2021-11-25 18:06:33,142 INFO L226 Difference]: Without dead ends: 177 [2021-11-25 18:06:33,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:06:33,143 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 123 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:06:33,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 223 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 18:06:33,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-11-25 18:06:33,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 159. [2021-11-25 18:06:33,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 94 states have (on average 1.7234042553191489) internal successors, (162), 153 states have internal predecessors, (162), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:06:33,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 168 transitions. [2021-11-25 18:06:33,149 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 168 transitions. Word has length 50 [2021-11-25 18:06:33,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:06:33,149 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 168 transitions. [2021-11-25 18:06:33,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 18:06:33,150 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 168 transitions. [2021-11-25 18:06:33,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-25 18:06:33,150 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:06:33,151 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:06:33,160 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (42)] Ended with exit code 0 [2021-11-25 18:06:33,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:06:33,357 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 78 more)] === [2021-11-25 18:06:33,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:06:33,357 INFO L85 PathProgramCache]: Analyzing trace with hash 2088184023, now seen corresponding path program 1 times [2021-11-25 18:06:33,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:06:33,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [336535964] [2021-11-25 18:06:33,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:06:33,358 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:06:33,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:06:33,359 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:06:33,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-25 18:06:33,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:06:33,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 18:06:33,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:06:33,795 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-25 18:06:33,795 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:06:33,795 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:06:33,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [336535964] [2021-11-25 18:06:33,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [336535964] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:06:33,795 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:06:33,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:06:33,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166230786] [2021-11-25 18:06:33,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:06:33,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:06:33,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:06:33,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:06:33,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:06:33,797 INFO L87 Difference]: Start difference. First operand 159 states and 168 transitions. Second operand has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 18:06:34,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:06:34,461 INFO L93 Difference]: Finished difference Result 158 states and 167 transitions. [2021-11-25 18:06:34,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:06:34,462 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2021-11-25 18:06:34,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:06:34,463 INFO L225 Difference]: With dead ends: 158 [2021-11-25 18:06:34,464 INFO L226 Difference]: Without dead ends: 158 [2021-11-25 18:06:34,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:06:34,465 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 126 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:06:34,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 215 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 18:06:34,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-25 18:06:34,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2021-11-25 18:06:34,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 94 states have (on average 1.7127659574468086) internal successors, (161), 152 states have internal predecessors, (161), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:06:34,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 167 transitions. [2021-11-25 18:06:34,470 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 167 transitions. Word has length 50 [2021-11-25 18:06:34,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:06:34,470 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 167 transitions. [2021-11-25 18:06:34,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 18:06:34,471 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 167 transitions. [2021-11-25 18:06:34,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-25 18:06:34,471 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:06:34,472 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:06:34,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-11-25 18:06:34,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:06:34,684 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 78 more)] === [2021-11-25 18:06:34,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:06:34,685 INFO L85 PathProgramCache]: Analyzing trace with hash 2088184470, now seen corresponding path program 1 times [2021-11-25 18:06:34,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:06:34,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1816216978] [2021-11-25 18:06:34,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:06:34,686 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:06:34,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:06:34,687 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:06:34,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-25 18:06:34,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:06:34,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 18:06:34,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:06:35,039 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-25 18:06:35,039 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:06:35,040 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:06:35,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1816216978] [2021-11-25 18:06:35,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1816216978] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:06:35,040 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:06:35,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:06:35,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274284820] [2021-11-25 18:06:35,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:06:35,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:06:35,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:06:35,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:06:35,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:06:35,041 INFO L87 Difference]: Start difference. First operand 158 states and 167 transitions. Second operand has 3 states, 2 states have (on average 15.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 18:06:35,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:06:35,319 INFO L93 Difference]: Finished difference Result 170 states and 180 transitions. [2021-11-25 18:06:35,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:06:35,320 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 15.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2021-11-25 18:06:35,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:06:35,321 INFO L225 Difference]: With dead ends: 170 [2021-11-25 18:06:35,321 INFO L226 Difference]: Without dead ends: 170 [2021-11-25 18:06:35,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:06:35,322 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 115 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:06:35,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 125 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 18:06:35,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-25 18:06:35,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 152. [2021-11-25 18:06:35,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 94 states have (on average 1.648936170212766) internal successors, (155), 146 states have internal predecessors, (155), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:06:35,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 161 transitions. [2021-11-25 18:06:35,328 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 161 transitions. Word has length 50 [2021-11-25 18:06:35,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:06:35,328 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 161 transitions. [2021-11-25 18:06:35,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 15.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 18:06:35,328 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 161 transitions. [2021-11-25 18:06:35,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-25 18:06:35,329 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:06:35,329 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:06:35,357 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (44)] Ended with exit code 0 [2021-11-25 18:06:35,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:06:35,542 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 78 more)] === [2021-11-25 18:06:35,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:06:35,543 INFO L85 PathProgramCache]: Analyzing trace with hash 2088184471, now seen corresponding path program 1 times [2021-11-25 18:06:35,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:06:35,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [910553114] [2021-11-25 18:06:35,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:06:35,544 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:06:35,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:06:35,545 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:06:35,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-11-25 18:06:35,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:06:35,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 18:06:35,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:06:36,082 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-25 18:06:36,083 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:06:36,083 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:06:36,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [910553114] [2021-11-25 18:06:36,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [910553114] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:06:36,083 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:06:36,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:06:36,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145594078] [2021-11-25 18:06:36,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:06:36,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:06:36,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:06:36,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:06:36,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:06:36,085 INFO L87 Difference]: Start difference. First operand 152 states and 161 transitions. Second operand has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 18:06:36,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:06:36,435 INFO L93 Difference]: Finished difference Result 146 states and 155 transitions. [2021-11-25 18:06:36,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:06:36,436 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2021-11-25 18:06:36,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:06:36,437 INFO L225 Difference]: With dead ends: 146 [2021-11-25 18:06:36,437 INFO L226 Difference]: Without dead ends: 146 [2021-11-25 18:06:36,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:06:36,438 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 240 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:06:36,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 149 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 18:06:36,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-11-25 18:06:36,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2021-11-25 18:06:36,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 94 states have (on average 1.5851063829787233) internal successors, (149), 140 states have internal predecessors, (149), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:06:36,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 155 transitions. [2021-11-25 18:06:36,443 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 155 transitions. Word has length 50 [2021-11-25 18:06:36,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:06:36,443 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 155 transitions. [2021-11-25 18:06:36,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 18:06:36,444 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 155 transitions. [2021-11-25 18:06:36,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-25 18:06:36,444 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:06:36,444 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:06:36,456 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (45)] Ended with exit code 0 [2021-11-25 18:06:36,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:06:36,653 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 78 more)] === [2021-11-25 18:06:36,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:06:36,653 INFO L85 PathProgramCache]: Analyzing trace with hash 309195281, now seen corresponding path program 1 times [2021-11-25 18:06:36,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:06:36,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1908456292] [2021-11-25 18:06:36,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:06:36,654 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:06:36,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:06:36,655 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:06:36,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-11-25 18:06:36,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:06:36,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 18:06:36,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:06:36,980 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:06:37,048 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 18:06:37,048 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:06:37,048 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:06:37,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1908456292] [2021-11-25 18:06:37,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1908456292] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:06:37,048 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:06:37,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:06:37,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669565566] [2021-11-25 18:06:37,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:06:37,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:06:37,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:06:37,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:06:37,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:06:37,050 INFO L87 Difference]: Start difference. First operand 146 states and 155 transitions. Second operand has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 18:06:37,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:06:37,747 INFO L93 Difference]: Finished difference Result 158 states and 168 transitions. [2021-11-25 18:06:37,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:06:37,748 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2021-11-25 18:06:37,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:06:37,749 INFO L225 Difference]: With dead ends: 158 [2021-11-25 18:06:37,749 INFO L226 Difference]: Without dead ends: 158 [2021-11-25 18:06:37,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:06:37,750 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 104 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:06:37,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 319 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 18:06:37,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-25 18:06:37,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 140. [2021-11-25 18:06:37,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 94 states have (on average 1.5212765957446808) internal successors, (143), 134 states have internal predecessors, (143), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:06:37,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 149 transitions. [2021-11-25 18:06:37,756 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 149 transitions. Word has length 51 [2021-11-25 18:06:37,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:06:37,756 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 149 transitions. [2021-11-25 18:06:37,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 18:06:37,757 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 149 transitions. [2021-11-25 18:06:37,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-25 18:06:37,757 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:06:37,758 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:06:37,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2021-11-25 18:06:37,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:06:37,971 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 78 more)] === [2021-11-25 18:06:37,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:06:37,972 INFO L85 PathProgramCache]: Analyzing trace with hash 309195282, now seen corresponding path program 1 times [2021-11-25 18:06:37,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:06:37,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1994800090] [2021-11-25 18:06:37,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:06:37,972 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:06:37,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:06:37,973 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:06:37,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-11-25 18:06:38,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:06:38,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 18:06:38,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:06:38,331 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:06:38,481 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 18:06:38,482 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:06:38,482 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:06:38,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1994800090] [2021-11-25 18:06:38,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1994800090] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:06:38,482 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:06:38,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:06:38,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097297518] [2021-11-25 18:06:38,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:06:38,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:06:38,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:06:38,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:06:38,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:06:38,483 INFO L87 Difference]: Start difference. First operand 140 states and 149 transitions. Second operand has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 18:06:39,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:06:39,211 INFO L93 Difference]: Finished difference Result 134 states and 143 transitions. [2021-11-25 18:06:39,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:06:39,212 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2021-11-25 18:06:39,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:06:39,213 INFO L225 Difference]: With dead ends: 134 [2021-11-25 18:06:39,213 INFO L226 Difference]: Without dead ends: 134 [2021-11-25 18:06:39,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:06:39,214 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 102 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:06:39,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 318 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 18:06:39,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-11-25 18:06:39,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2021-11-25 18:06:39,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 94 states have (on average 1.4574468085106382) internal successors, (137), 128 states have internal predecessors, (137), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:06:39,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 143 transitions. [2021-11-25 18:06:39,219 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 143 transitions. Word has length 51 [2021-11-25 18:06:39,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:06:39,219 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 143 transitions. [2021-11-25 18:06:39,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 18:06:39,219 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 143 transitions. [2021-11-25 18:06:39,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-25 18:06:39,219 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:06:39,219 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:06:39,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2021-11-25 18:06:39,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:06:39,420 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 78 more)] === [2021-11-25 18:06:39,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:06:39,421 INFO L85 PathProgramCache]: Analyzing trace with hash 783922964, now seen corresponding path program 1 times [2021-11-25 18:06:39,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:06:39,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2066027745] [2021-11-25 18:06:39,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:06:39,422 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:06:39,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:06:39,423 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:06:39,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-11-25 18:06:39,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:06:39,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-25 18:06:39,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:06:39,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:39,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-25 18:06:40,248 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 18:06:40,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 30 [2021-11-25 18:06:40,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 18:06:41,073 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-11-25 18:06:41,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 53 [2021-11-25 18:06:41,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:06:42,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 18:06:42,714 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:06:42,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 50 [2021-11-25 18:06:42,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:42,962 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 0 case distinctions, treesize of input 58 treesize of output 41 [2021-11-25 18:06:43,556 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-25 18:06:43,556 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 56 [2021-11-25 18:06:43,581 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 7 treesize of output 3 [2021-11-25 18:06:43,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2021-11-25 18:06:45,266 INFO L354 Elim1Store]: treesize reduction 81, result has 43.0 percent of original size [2021-11-25 18:06:45,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 case distinctions, treesize of input 61 treesize of output 100 [2021-11-25 18:06:45,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:45,332 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:06:45,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 129 treesize of output 95 [2021-11-25 18:06:45,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:45,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 18:06:46,428 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 15 treesize of output 7 [2021-11-25 18:06:48,627 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-25 18:06:48,627 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 136 treesize of output 59 [2021-11-25 18:06:52,381 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:06:52,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:06:53,155 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:06:53,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2066027745] [2021-11-25 18:06:53,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2066027745] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:06:53,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1657133668] [2021-11-25 18:06:53,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:06:53,156 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:06:53,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:06:53,161 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:06:53,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2021-11-25 18:06:53,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:06:53,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-25 18:06:53,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:06:54,150 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:06:55,147 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 18:06:55,147 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 23 treesize of output 30 [2021-11-25 18:06:55,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:06:55,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 18:06:56,249 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:06:56,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 34 [2021-11-25 18:06:56,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:56,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 32 [2021-11-25 18:06:56,926 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:06:56,926 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 37 [2021-11-25 18:06:56,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:06:56,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-25 18:06:57,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:57,899 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:06:57,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 59 [2021-11-25 18:06:57,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:57,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 18:06:57,967 INFO L354 Elim1Store]: treesize reduction 66, result has 42.6 percent of original size [2021-11-25 18:06:57,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 51 treesize of output 80 [2021-11-25 18:06:58,517 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 15 treesize of output 7 [2021-11-25 18:06:59,342 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:06:59,343 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 43 [2021-11-25 18:07:00,905 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:07:00,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:07:01,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1657133668] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:07:01,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338543628] [2021-11-25 18:07:01,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:07:01,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:07:01,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:07:01,345 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:07:01,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-25 18:07:01,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:07:01,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-25 18:07:01,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:07:02,830 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:07:02,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-11-25 18:07:03,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:07:03,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 18:07:03,692 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:07:03,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 33 [2021-11-25 18:07:03,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:07:03,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 32 [2021-11-25 18:07:51,124 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:07:51,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 73 [2021-11-25 18:07:51,154 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-25 18:07:51,154 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 1 case distinctions, treesize of input 25 treesize of output 32 [2021-11-25 18:07:51,209 INFO L354 Elim1Store]: treesize reduction 42, result has 44.0 percent of original size [2021-11-25 18:07:51,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 42 treesize of output 63 [2021-11-25 18:07:52,257 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:07:52,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2021-11-25 18:07:54,521 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-11-25 18:07:54,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 65 treesize of output 60 [2021-11-25 18:07:56,752 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:07:56,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:08:01,098 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_node_create_~temp~0#1.base_201| (_ BitVec 32)) (v_ArrVal_3681 (_ BitVec 32)) (v_ArrVal_3682 (_ BitVec 32)) (v_ArrVal_3678 (_ BitVec 32)) (v_ArrVal_3679 (_ BitVec 32)) (v_ArrVal_3680 (_ BitVec 1))) (let ((.cse2 (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_201| (store (store (store (select |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_201|) (_ bv0 32) (_ bv0 32)) (_ bv4 32) v_ArrVal_3681) (_ bv8 32) v_ArrVal_3679)))) (let ((.cse1 (select (select .cse2 |c_ULTIMATE.start_dll_circular_insert_~head#1.base|) |c_ULTIMATE.start_dll_circular_insert_~head#1.offset|)) (.cse0 (select (select (store |c_#memory_$Pointer$.offset| |v_node_create_~temp~0#1.base_201| (store (store (store (select |c_#memory_$Pointer$.offset| |v_node_create_~temp~0#1.base_201|) (_ bv0 32) (_ bv0 32)) (_ bv4 32) v_ArrVal_3682) (_ bv8 32) v_ArrVal_3678)) |c_ULTIMATE.start_dll_circular_insert_~head#1.base|) |c_ULTIMATE.start_dll_circular_insert_~head#1.offset|))) (or (and (= .cse0 (_ bv0 32)) (= .cse1 (_ bv0 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| |v_node_create_~temp~0#1.base_201| v_ArrVal_3680) (select (select .cse2 .cse1) .cse0)))))))) (_ bv1 1))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_#valid| |v_node_create_~temp~0#1.base_201|)))))))))) is different from false [2021-11-25 18:08:01,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338543628] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:08:01,104 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:08:01,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 30] total 83 [2021-11-25 18:08:01,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738153500] [2021-11-25 18:08:01,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:08:01,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-11-25 18:08:01,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:08:01,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-11-25 18:08:01,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=427, Invalid=8848, Unknown=41, NotChecked=190, Total=9506 [2021-11-25 18:08:01,110 INFO L87 Difference]: Start difference. First operand 134 states and 143 transitions. Second operand has 84 states, 77 states have (on average 1.8181818181818181) internal successors, (140), 70 states have internal predecessors, (140), 9 states have call successors, (9), 9 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-25 18:08:26,404 WARN L227 SmtUtils]: Spent 8.11s on a formula simplification. DAG size of input: 73 DAG size of output: 48 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:09:15,471 WARN L227 SmtUtils]: Spent 8.28s on a formula simplification. DAG size of input: 87 DAG size of output: 63 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:09:37,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:09:37,635 INFO L93 Difference]: Finished difference Result 141 states and 149 transitions. [2021-11-25 18:09:37,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-25 18:09:37,636 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 77 states have (on average 1.8181818181818181) internal successors, (140), 70 states have internal predecessors, (140), 9 states have call successors, (9), 9 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 53 [2021-11-25 18:09:37,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:09:37,637 INFO L225 Difference]: With dead ends: 141 [2021-11-25 18:09:37,637 INFO L226 Difference]: Without dead ends: 141 [2021-11-25 18:09:37,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 98 SyntacticMatches, 7 SemanticMatches, 125 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6385 ImplicationChecksByTransitivity, 158.3s TimeCoverageRelationStatistics Valid=781, Invalid=14890, Unknown=83, NotChecked=248, Total=16002 [2021-11-25 18:09:37,644 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 10 mSDsluCounter, 2033 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 2138 SdHoareTripleChecker+Invalid, 1403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1032 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:09:37,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 2138 Invalid, 1403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 362 Invalid, 0 Unknown, 1032 Unchecked, 0.8s Time] [2021-11-25 18:09:37,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-25 18:09:37,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2021-11-25 18:09:37,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 101 states have (on average 1.4158415841584158) internal successors, (143), 134 states have internal predecessors, (143), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:09:37,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 149 transitions. [2021-11-25 18:09:37,648 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 149 transitions. Word has length 53 [2021-11-25 18:09:37,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:09:37,649 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 149 transitions. [2021-11-25 18:09:37,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 77 states have (on average 1.8181818181818181) internal successors, (140), 70 states have internal predecessors, (140), 9 states have call successors, (9), 9 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-25 18:09:37,649 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 149 transitions. [2021-11-25 18:09:37,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-25 18:09:37,650 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:09:37,650 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:09:37,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-11-25 18:09:37,877 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (49)] Ended with exit code 0 [2021-11-25 18:09:38,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2021-11-25 18:09:38,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:09:38,273 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 78 more)] === [2021-11-25 18:09:38,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:09:38,274 INFO L85 PathProgramCache]: Analyzing trace with hash 783922965, now seen corresponding path program 1 times [2021-11-25 18:09:38,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:09:38,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1529221295] [2021-11-25 18:09:38,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:09:38,274 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:09:38,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:09:38,275 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:09:38,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2021-11-25 18:09:38,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:09:38,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 90 conjunts are in the unsatisfiable core [2021-11-25 18:09:38,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:09:38,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:38,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 18:09:38,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:09:39,320 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 18:09:39,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 28 [2021-11-25 18:09:39,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 18:09:39,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-25 18:09:40,209 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:09:40,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 12 treesize of output 18 [2021-11-25 18:09:40,307 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-11-25 18:09:40,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 31 treesize of output 48 [2021-11-25 18:09:40,791 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 11 treesize of output 7 [2021-11-25 18:09:40,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:09:41,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 18:09:41,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 18:09:41,765 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:09:41,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 65 [2021-11-25 18:09:41,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-11-25 18:09:41,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:41,993 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 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 18:09:42,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:42,006 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 0 case distinctions, treesize of input 67 treesize of output 46 [2021-11-25 18:09:42,494 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-25 18:09:42,494 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 137 treesize of output 68 [2021-11-25 18:09:42,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:42,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:09:42,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-11-25 18:09:42,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 18:09:44,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:44,115 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:09:44,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 145 treesize of output 111 [2021-11-25 18:09:44,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:44,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:44,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:44,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 30 [2021-11-25 18:09:44,243 INFO L354 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2021-11-25 18:09:44,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 61 [2021-11-25 18:09:44,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-11-25 18:09:47,594 INFO L354 Elim1Store]: treesize reduction 29, result has 9.4 percent of original size [2021-11-25 18:09:47,595 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 149 treesize of output 67 [2021-11-25 18:09:47,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:47,633 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 18:09:47,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-11-25 18:09:51,080 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:09:51,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:09:54,804 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:09:54,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1529221295] [2021-11-25 18:09:54,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1529221295] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:09:54,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [538926572] [2021-11-25 18:09:54,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:09:54,805 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:09:54,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:09:54,805 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:09:54,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2021-11-25 18:09:55,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:09:55,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 85 conjunts are in the unsatisfiable core [2021-11-25 18:09:55,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:09:55,978 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:09:55,984 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:09:57,521 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 18:09:57,521 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 25 treesize of output 32 [2021-11-25 18:09:57,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 18:09:58,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:09:58,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:09:58,528 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:09:58,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 66 [2021-11-25 18:09:58,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-11-25 18:09:59,250 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:09:59,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 54 [2021-11-25 18:09:59,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-11-25 18:09:59,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:59,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 44 [2021-11-25 18:09:59,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:59,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 18:10:00,497 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:10:00,497 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 57 [2021-11-25 18:10:00,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-25 18:10:00,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 18:10:00,525 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 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:10:02,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:02,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:02,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:02,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 25 treesize of output 30 [2021-11-25 18:10:02,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:02,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-11-25 18:10:02,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:02,131 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:10:02,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 95 treesize of output 85 [2021-11-25 18:10:02,172 INFO L354 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2021-11-25 18:10:02,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 57 [2021-11-25 18:10:03,946 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-25 18:10:03,946 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 91 treesize of output 49 [2021-11-25 18:10:03,970 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 18:10:03,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-11-25 18:10:04,466 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:10:04,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:10:07,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [538926572] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:10:07,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656285574] [2021-11-25 18:10:07,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:10:07,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:10:07,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:10:07,870 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:10:07,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-25 18:10:08,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:10:08,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 88 conjunts are in the unsatisfiable core [2021-11-25 18:10:08,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:10:08,332 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:10:10,369 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 18:10:10,370 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 26 treesize of output 33 [2021-11-25 18:10:10,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 18:10:11,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:10:11,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:10:11,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 18:10:11,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 18:10:12,060 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:10:12,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 51 [2021-11-25 18:10:12,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-11-25 18:10:12,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:12,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 18:10:12,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:12,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 46 [2021-11-25 18:11:16,418 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:11:16,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 95 [2021-11-25 18:11:16,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:16,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:16,453 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-25 18:11:16,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 42 [2021-11-25 18:11:16,488 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-11-25 18:11:16,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 51 [2021-11-25 18:11:16,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-25 18:11:19,740 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-11-25 18:11:19,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 81 treesize of output 68 [2021-11-25 18:11:19,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:19,798 INFO L354 Elim1Store]: treesize reduction 28, result has 37.8 percent of original size [2021-11-25 18:11:19,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 35 [2021-11-25 18:11:20,607 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:11:20,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:11:28,817 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4120 (_ BitVec 32)) (v_ArrVal_4118 (_ BitVec 32)) (v_ArrVal_4116 (_ BitVec 32)) (|v_node_create_~temp~0#1.base_210| (_ BitVec 32)) (v_ArrVal_4117 (_ BitVec 32))) (let ((.cse1 (store |c_#memory_$Pointer$.offset| |v_node_create_~temp~0#1.base_210| (store (store (store (select |c_#memory_$Pointer$.offset| |v_node_create_~temp~0#1.base_210|) (_ bv0 32) (_ bv0 32)) (_ bv4 32) v_ArrVal_4120) (_ bv8 32) v_ArrVal_4116)))) (let ((.cse2 (select (select (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_210| (store (store (store (select |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_210|) (_ bv0 32) (_ bv0 32)) (_ bv4 32) v_ArrVal_4117) (_ bv8 32) v_ArrVal_4118)) |c_ULTIMATE.start_dll_circular_insert_~head#1.base|) |c_ULTIMATE.start_dll_circular_insert_~head#1.offset|)) (.cse3 (select (select .cse1 |c_ULTIMATE.start_dll_circular_insert_~head#1.base|) |c_ULTIMATE.start_dll_circular_insert_~head#1.offset|))) (or (and (let ((.cse0 (select (select .cse1 .cse2) .cse3))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0))) (forall ((v_ArrVal_4119 (_ BitVec 32))) (let ((.cse4 (store |c_#memory_$Pointer$.offset| |v_node_create_~temp~0#1.base_210| (store (store (store (select |c_#memory_$Pointer$.offset| |v_node_create_~temp~0#1.base_210|) (_ bv0 32) (_ bv0 32)) (_ bv4 32) v_ArrVal_4120) (_ bv8 32) v_ArrVal_4116))) (.cse7 (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_210| (store (store (store (select |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_210|) (_ bv0 32) (_ bv0 32)) (_ bv4 32) v_ArrVal_4117) (_ bv8 32) v_ArrVal_4118)))) (let ((.cse5 (select (select .cse7 |c_ULTIMATE.start_dll_circular_insert_~head#1.base|) |c_ULTIMATE.start_dll_circular_insert_~head#1.offset|)) (.cse6 (select (select .cse4 |c_ULTIMATE.start_dll_circular_insert_~head#1.base|) |c_ULTIMATE.start_dll_circular_insert_~head#1.offset|))) (bvule (bvadd (_ bv8 32) (select (select .cse4 .cse5) .cse6)) (select (store |c_#length| |v_node_create_~temp~0#1.base_210| v_ArrVal_4119) (select (select .cse7 .cse5) .cse6))))))) (and (= .cse2 (_ bv0 32)) (= .cse3 (_ bv0 32))) (not (= (_ bv0 1) (select |c_#valid| |v_node_create_~temp~0#1.base_210|))))))) is different from false [2021-11-25 18:11:28,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656285574] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:11:28,825 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:11:28,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 31] total 83 [2021-11-25 18:11:28,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692032154] [2021-11-25 18:11:28,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:11:28,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-11-25 18:11:28,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:11:28,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-11-25 18:11:28,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=8868, Unknown=53, NotChecked=190, Total=9506 [2021-11-25 18:11:28,830 INFO L87 Difference]: Start difference. First operand 141 states and 149 transitions. Second operand has 84 states, 77 states have (on average 1.7662337662337662) internal successors, (136), 70 states have internal predecessors, (136), 9 states have call successors, (9), 9 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-25 18:11:52,298 WARN L227 SmtUtils]: Spent 8.17s on a formula simplification. DAG size of input: 82 DAG size of output: 57 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:12:42,139 WARN L227 SmtUtils]: Spent 8.20s on a formula simplification. DAG size of input: 92 DAG size of output: 65 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:13:44,456 WARN L227 SmtUtils]: Spent 8.40s on a formula simplification. DAG size of input: 108 DAG size of output: 73 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:14:12,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:14:12,351 INFO L93 Difference]: Finished difference Result 140 states and 148 transitions. [2021-11-25 18:14:12,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-25 18:14:12,352 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 77 states have (on average 1.7662337662337662) internal successors, (136), 70 states have internal predecessors, (136), 9 states have call successors, (9), 9 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 53 [2021-11-25 18:14:12,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:14:12,353 INFO L225 Difference]: With dead ends: 140 [2021-11-25 18:14:12,353 INFO L226 Difference]: Without dead ends: 140 [2021-11-25 18:14:12,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 102 SyntacticMatches, 5 SemanticMatches, 130 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6124 ImplicationChecksByTransitivity, 252.7s TimeCoverageRelationStatistics Valid=821, Invalid=16090, Unknown=123, NotChecked=258, Total=17292 [2021-11-25 18:14:12,360 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 16 mSDsluCounter, 2703 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 2808 SdHoareTripleChecker+Invalid, 2373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1683 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:14:12,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 2808 Invalid, 2373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 678 Invalid, 0 Unknown, 1683 Unchecked, 1.7s Time] [2021-11-25 18:14:12,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-25 18:14:12,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2021-11-25 18:14:12,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 101 states have (on average 1.4059405940594059) internal successors, (142), 133 states have internal predecessors, (142), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:14:12,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 148 transitions. [2021-11-25 18:14:12,365 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 148 transitions. Word has length 53 [2021-11-25 18:14:12,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:14:12,365 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 148 transitions. [2021-11-25 18:14:12,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 77 states have (on average 1.7662337662337662) internal successors, (136), 70 states have internal predecessors, (136), 9 states have call successors, (9), 9 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-25 18:14:12,365 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 148 transitions. [2021-11-25 18:14:12,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-25 18:14:12,366 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:14:12,366 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:14:12,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2021-11-25 18:14:12,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (52)] Forceful destruction successful, exit code 0 [2021-11-25 18:14:12,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-11-25 18:14:12,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:14:12,981 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr44REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 78 more)] === [2021-11-25 18:14:12,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:14:12,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1730694709, now seen corresponding path program 1 times [2021-11-25 18:14:12,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:14:12,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1527395786] [2021-11-25 18:14:12,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:14:12,982 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:14:12,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:14:12,983 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:14:12,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2021-11-25 18:14:13,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:14:13,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 18:14:13,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:14:13,449 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-25 18:14:13,449 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:14:13,449 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:14:13,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1527395786] [2021-11-25 18:14:13,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1527395786] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:14:13,449 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:14:13,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:14:13,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973918545] [2021-11-25 18:14:13,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:14:13,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:14:13,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:14:13,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:14:13,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:14:13,450 INFO L87 Difference]: Start difference. First operand 140 states and 148 transitions. Second operand has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 18:14:13,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:14:13,744 INFO L93 Difference]: Finished difference Result 157 states and 166 transitions. [2021-11-25 18:14:13,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:14:13,744 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2021-11-25 18:14:13,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:14:13,745 INFO L225 Difference]: With dead ends: 157 [2021-11-25 18:14:13,745 INFO L226 Difference]: Without dead ends: 157 [2021-11-25 18:14:13,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:14:13,746 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 208 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:14:13,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 134 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 18:14:13,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-11-25 18:14:13,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 139. [2021-11-25 18:14:13,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 101 states have (on average 1.396039603960396) internal successors, (141), 132 states have internal predecessors, (141), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:14:13,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 147 transitions. [2021-11-25 18:14:13,750 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 147 transitions. Word has length 55 [2021-11-25 18:14:13,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:14:13,750 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 147 transitions. [2021-11-25 18:14:13,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 18:14:13,751 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 147 transitions. [2021-11-25 18:14:13,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-25 18:14:13,751 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:14:13,751 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:14:13,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2021-11-25 18:14:13,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:14:13,965 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr45REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 78 more)] === [2021-11-25 18:14:13,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:14:13,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1730694710, now seen corresponding path program 1 times [2021-11-25 18:14:13,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:14:13,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1948645466] [2021-11-25 18:14:13,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:14:13,966 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:14:13,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:14:13,967 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:14:13,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2021-11-25 18:14:14,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:14:14,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 18:14:14,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:14:14,541 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-25 18:14:14,541 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:14:14,541 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:14:14,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1948645466] [2021-11-25 18:14:14,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1948645466] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:14:14,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:14:14,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:14:14,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855055257] [2021-11-25 18:14:14,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:14:14,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:14:14,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:14:14,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:14:14,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:14:14,543 INFO L87 Difference]: Start difference. First operand 139 states and 147 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 18:14:14,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:14:14,864 INFO L93 Difference]: Finished difference Result 135 states and 143 transitions. [2021-11-25 18:14:14,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:14:14,878 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2021-11-25 18:14:14,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:14:14,879 INFO L225 Difference]: With dead ends: 135 [2021-11-25 18:14:14,879 INFO L226 Difference]: Without dead ends: 135 [2021-11-25 18:14:14,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:14:14,880 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 188 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:14:14,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 136 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 18:14:14,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-11-25 18:14:14,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2021-11-25 18:14:14,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 101 states have (on average 1.3564356435643565) internal successors, (137), 128 states have internal predecessors, (137), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:14:14,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 143 transitions. [2021-11-25 18:14:14,885 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 143 transitions. Word has length 55 [2021-11-25 18:14:14,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:14:14,885 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 143 transitions. [2021-11-25 18:14:14,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 18:14:14,886 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 143 transitions. [2021-11-25 18:14:14,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-25 18:14:14,886 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:14:14,886 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:14:14,900 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (55)] Ended with exit code 0 [2021-11-25 18:14:15,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:14:15,100 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr46REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 78 more)] === [2021-11-25 18:14:15,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:14:15,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1045275033, now seen corresponding path program 1 times [2021-11-25 18:14:15,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:14:15,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [801086343] [2021-11-25 18:14:15,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:14:15,101 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:14:15,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:14:15,102 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:14:15,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d341d8c-8e35-44c3-b072-133fb14b84bc/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2021-11-25 18:14:15,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:14:15,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 65 conjunts are in the unsatisfiable core [2021-11-25 18:14:15,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:14:15,781 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:14:15,791 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:14:15,825 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 10 treesize of output 8 [2021-11-25 18:14:15,831 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 5 treesize of output 3 [2021-11-25 18:14:18,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:18,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 18:14:18,080 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:14:18,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-11-25 18:14:18,157 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 5 treesize of output 3 [2021-11-25 18:14:20,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:20,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 18:14:21,036 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 5 treesize of output 3 [2021-11-25 18:14:21,041 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 7 treesize of output 3 [2021-11-25 18:14:23,124 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:14:23,767 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:14:23,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-11-25 18:14:23,773 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 5 treesize of output 3 [2021-11-25 18:14:23,793 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 6 treesize of output 5 [2021-11-25 18:14:23,850 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:14:23,850 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 12 treesize of output 18 [2021-11-25 18:14:24,287 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 15 treesize of output 7 [2021-11-25 18:14:25,246 INFO L354 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2021-11-25 18:14:25,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 44 [2021-11-25 18:14:25,274 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 5 treesize of output 3 [2021-11-25 18:14:25,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-11-25 18:14:25,531 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:14:25,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 48 [2021-11-25 18:14:25,560 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 18 treesize of output 14 [2021-11-25 18:14:25,792 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:14:25,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 49 [2021-11-25 18:14:25,816 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 19 treesize of output 15 [2021-11-25 18:14:26,242 INFO L354 Elim1Store]: treesize reduction 25, result has 30.6 percent of original size [2021-11-25 18:14:26,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 51 [2021-11-25 18:14:26,289 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:14:26,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-11-25 18:14:28,393 INFO L354 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2021-11-25 18:14:28,393 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 61 treesize of output 45 [2021-11-25 18:14:29,086 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:14:29,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:14:39,102 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:14:39,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 342130 treesize of output 320536 [2021-11-25 18:14:46,650 WARN L227 SmtUtils]: Spent 5.86s on a formula simplification. DAG size of input: 309 DAG size of output: 205 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-25 18:14:46,651 INFO L354 Elim1Store]: treesize reduction 357, result has 68.2 percent of original size [2021-11-25 18:14:46,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 421932 treesize of output 378593 [2021-11-25 18:15:01,761 WARN L227 SmtUtils]: Spent 15.11s on a formula simplification. DAG size of input: 1576 DAG size of output: 1560 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-25 18:15:01,915 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 321325 treesize of output 318075 [2021-11-25 18:15:11,518 WARN L227 SmtUtils]: Spent 9.60s on a formula simplification. DAG size of input: 1568 DAG size of output: 1566 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-25 18:15:11,830 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:15:11,832 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 316825 treesize of output 287901 [2021-11-25 18:15:18,445 WARN L227 SmtUtils]: Spent 6.61s on a formula simplification. DAG size of input: 1583 DAG size of output: 1581 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-25 18:15:18,709 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 294645 treesize of output 288159 [2021-11-25 18:15:30,330 WARN L227 SmtUtils]: Spent 11.62s on a formula simplification. DAG size of input: 1583 DAG size of output: 1575 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)