./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-array/btor2c-lazyMod.unsafe_linked_list_fifo_n2d4.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-array/btor2c-lazyMod.unsafe_linked_list_fifo_n2d4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 96d9860a7686f708af2c69f8c9732693665f35b4386bdf987f4dd5e89313b9fb --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 01:05:38,332 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 01:05:38,335 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 01:05:38,375 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 01:05:38,376 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 01:05:38,381 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 01:05:38,383 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 01:05:38,392 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 01:05:38,394 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 01:05:38,395 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 01:05:38,397 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 01:05:38,398 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 01:05:38,398 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 01:05:38,400 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 01:05:38,401 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 01:05:38,402 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 01:05:38,403 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 01:05:38,404 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 01:05:38,406 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 01:05:38,409 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 01:05:38,410 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 01:05:38,412 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 01:05:38,414 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 01:05:38,415 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 01:05:38,419 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 01:05:38,420 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 01:05:38,420 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 01:05:38,421 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 01:05:38,422 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 01:05:38,423 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 01:05:38,423 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 01:05:38,424 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 01:05:38,425 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 01:05:38,426 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 01:05:38,427 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 01:05:38,428 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 01:05:38,429 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 01:05:38,429 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 01:05:38,429 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 01:05:38,430 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 01:05:38,431 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 01:05:38,432 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-26 01:05:38,479 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 01:05:38,481 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 01:05:38,482 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 01:05:38,482 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 01:05:38,483 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 01:05:38,483 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 01:05:38,483 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 01:05:38,484 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 01:05:38,484 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 01:05:38,484 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 01:05:38,486 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 01:05:38,486 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 01:05:38,486 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 01:05:38,486 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 01:05:38,487 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 01:05:38,487 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 01:05:38,487 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 01:05:38,487 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 01:05:38,488 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 01:05:38,488 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 01:05:38,489 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 01:05:38,489 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 01:05:38,489 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 01:05:38,489 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 01:05:38,490 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 01:05:38,490 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 01:05:38,490 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 01:05:38,490 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 01:05:38,491 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 01:05:38,491 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:05:38,491 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 01:05:38,492 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 01:05:38,492 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 01:05:38,492 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 01:05:38,492 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 01:05:38,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 01:05:38,493 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 01:05:38,493 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 01:05:38,493 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 96d9860a7686f708af2c69f8c9732693665f35b4386bdf987f4dd5e89313b9fb [2022-11-26 01:05:38,905 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 01:05:38,937 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 01:05:38,940 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 01:05:38,942 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 01:05:38,943 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 01:05:38,944 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/hardware-verification-array/btor2c-lazyMod.unsafe_linked_list_fifo_n2d4.c [2022-11-26 01:05:42,550 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 01:05:42,949 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 01:05:42,950 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/sv-benchmarks/c/hardware-verification-array/btor2c-lazyMod.unsafe_linked_list_fifo_n2d4.c [2022-11-26 01:05:42,971 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/data/c142d9b7c/488bf0c1265c4be895a3fecec505f9d4/FLAG2ef0d730c [2022-11-26 01:05:43,003 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/data/c142d9b7c/488bf0c1265c4be895a3fecec505f9d4 [2022-11-26 01:05:43,009 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 01:05:43,012 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 01:05:43,017 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 01:05:43,017 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 01:05:43,022 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 01:05:43,024 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:05:43" (1/1) ... [2022-11-26 01:05:43,025 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ad75da2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:05:43, skipping insertion in model container [2022-11-26 01:05:43,025 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:05:43" (1/1) ... [2022-11-26 01:05:43,035 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 01:05:43,155 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 01:05:43,342 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/sv-benchmarks/c/hardware-verification-array/btor2c-lazyMod.unsafe_linked_list_fifo_n2d4.c[1107,1120] [2022-11-26 01:05:43,721 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:05:43,746 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 01:05:43,760 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/sv-benchmarks/c/hardware-verification-array/btor2c-lazyMod.unsafe_linked_list_fifo_n2d4.c[1107,1120] [2022-11-26 01:05:44,016 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:05:44,038 INFO L208 MainTranslator]: Completed translation [2022-11-26 01:05:44,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:05:44 WrapperNode [2022-11-26 01:05:44,039 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 01:05:44,040 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 01:05:44,040 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 01:05:44,040 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 01:05:44,048 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:05:44" (1/1) ... [2022-11-26 01:05:44,115 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:05:44" (1/1) ... [2022-11-26 01:05:44,230 INFO L138 Inliner]: procedures = 15, calls = 102, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1472 [2022-11-26 01:05:44,231 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 01:05:44,232 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 01:05:44,232 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 01:05:44,232 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 01:05:44,245 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:05:44" (1/1) ... [2022-11-26 01:05:44,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:05:44" (1/1) ... [2022-11-26 01:05:44,268 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:05:44" (1/1) ... [2022-11-26 01:05:44,268 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:05:44" (1/1) ... [2022-11-26 01:05:44,322 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:05:44" (1/1) ... [2022-11-26 01:05:44,331 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:05:44" (1/1) ... [2022-11-26 01:05:44,338 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:05:44" (1/1) ... [2022-11-26 01:05:44,346 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:05:44" (1/1) ... [2022-11-26 01:05:44,362 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 01:05:44,363 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 01:05:44,363 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 01:05:44,363 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 01:05:44,364 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:05:44" (1/1) ... [2022-11-26 01:05:44,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:05:44,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:05:44,415 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 01:05:44,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 01:05:44,537 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-26 01:05:44,537 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-26 01:05:44,537 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-26 01:05:44,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-26 01:05:44,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 01:05:44,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 01:05:44,539 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-26 01:05:44,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 01:05:45,145 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 01:05:45,147 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 01:05:48,815 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 01:05:49,168 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 01:05:49,168 INFO L300 CfgBuilder]: Removed 19 assume(true) statements. [2022-11-26 01:05:49,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:05:49 BoogieIcfgContainer [2022-11-26 01:05:49,171 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 01:05:49,174 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 01:05:49,174 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 01:05:49,178 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 01:05:49,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 01:05:43" (1/3) ... [2022-11-26 01:05:49,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5900aece and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 01:05:49, skipping insertion in model container [2022-11-26 01:05:49,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:05:44" (2/3) ... [2022-11-26 01:05:49,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5900aece and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 01:05:49, skipping insertion in model container [2022-11-26 01:05:49,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:05:49" (3/3) ... [2022-11-26 01:05:49,181 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.unsafe_linked_list_fifo_n2d4.c [2022-11-26 01:05:49,205 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 01:05:49,205 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 01:05:49,263 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 01:05:49,271 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@71697328, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 01:05:49,272 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 01:05:49,277 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 30 states have internal predecessors, (50), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-26 01:05:49,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-26 01:05:49,287 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:05:49,287 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:05:49,288 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:05:49,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:05:49,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1432321088, now seen corresponding path program 1 times [2022-11-26 01:05:49,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:05:49,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884650608] [2022-11-26 01:05:49,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:49,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:05:49,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:50,575 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-26 01:05:50,576 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:05:50,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884650608] [2022-11-26 01:05:50,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884650608] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:05:50,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:05:50,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 01:05:50,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316979638] [2022-11-26 01:05:50,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:05:50,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:05:50,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:05:50,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:05:50,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:05:50,627 INFO L87 Difference]: Start difference. First operand has 37 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 30 states have internal predecessors, (50), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-26 01:05:52,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:05:52,142 INFO L93 Difference]: Finished difference Result 72 states and 119 transitions. [2022-11-26 01:05:52,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:05:52,145 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 27 [2022-11-26 01:05:52,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:05:52,154 INFO L225 Difference]: With dead ends: 72 [2022-11-26 01:05:52,154 INFO L226 Difference]: Without dead ends: 37 [2022-11-26 01:05:52,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:05:52,165 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-26 01:05:52,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-26 01:05:52,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-26 01:05:52,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-11-26 01:05:52,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 30 states have internal predecessors, (49), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-26 01:05:52,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 59 transitions. [2022-11-26 01:05:52,224 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 59 transitions. Word has length 27 [2022-11-26 01:05:52,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:05:52,225 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 59 transitions. [2022-11-26 01:05:52,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-26 01:05:52,225 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 59 transitions. [2022-11-26 01:05:52,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-26 01:05:52,227 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:05:52,228 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:05:52,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 01:05:52,229 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:05:52,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:05:52,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1523799713, now seen corresponding path program 1 times [2022-11-26 01:05:52,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:05:52,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595518965] [2022-11-26 01:05:52,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:52,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:05:52,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:52,907 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-26 01:05:52,908 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:05:52,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595518965] [2022-11-26 01:05:52,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595518965] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:05:52,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868912095] [2022-11-26 01:05:52,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:52,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:05:52,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:05:52,918 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:05:52,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 01:05:53,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:53,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 01:05:53,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:05:53,830 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-26 01:05:53,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:05:53,875 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-26 01:05:53,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868912095] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-26 01:05:53,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:05:53,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2022-11-26 01:05:53,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688590286] [2022-11-26 01:05:53,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:05:53,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:05:53,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:05:53,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:05:53,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:05:53,880 INFO L87 Difference]: Start difference. First operand 37 states and 59 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-26 01:05:54,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:05:54,907 INFO L93 Difference]: Finished difference Result 70 states and 112 transitions. [2022-11-26 01:05:54,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:05:54,908 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 28 [2022-11-26 01:05:54,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:05:54,909 INFO L225 Difference]: With dead ends: 70 [2022-11-26 01:05:54,909 INFO L226 Difference]: Without dead ends: 38 [2022-11-26 01:05:54,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:05:54,911 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:05:54,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-26 01:05:54,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-26 01:05:54,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-11-26 01:05:54,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 31 states have internal predecessors, (50), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-26 01:05:54,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 60 transitions. [2022-11-26 01:05:54,920 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 60 transitions. Word has length 28 [2022-11-26 01:05:54,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:05:54,921 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 60 transitions. [2022-11-26 01:05:54,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-26 01:05:54,921 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 60 transitions. [2022-11-26 01:05:54,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-26 01:05:54,922 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:05:54,923 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:05:54,938 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-26 01:05:55,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:05:55,131 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:05:55,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:05:55,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1178371353, now seen corresponding path program 1 times [2022-11-26 01:05:55,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:05:55,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794345772] [2022-11-26 01:05:55,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:55,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:05:55,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:55,712 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-26 01:05:55,713 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:05:55,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794345772] [2022-11-26 01:05:55,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794345772] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:05:55,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979565009] [2022-11-26 01:05:55,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:55,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:05:55,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:05:55,723 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:05:55,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 01:05:56,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:56,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 757 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 01:05:56,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:05:56,992 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-26 01:05:56,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:05:57,028 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-26 01:05:57,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979565009] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-26 01:05:57,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:05:57,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2022-11-26 01:05:57,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507374918] [2022-11-26 01:05:57,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:05:57,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:05:57,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:05:57,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:05:57,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:05:57,032 INFO L87 Difference]: Start difference. First operand 38 states and 60 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-26 01:05:57,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:05:57,694 INFO L93 Difference]: Finished difference Result 73 states and 116 transitions. [2022-11-26 01:05:57,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:05:57,695 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 29 [2022-11-26 01:05:57,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:05:57,696 INFO L225 Difference]: With dead ends: 73 [2022-11-26 01:05:57,696 INFO L226 Difference]: Without dead ends: 39 [2022-11-26 01:05:57,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:05:57,699 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 01:05:57,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 01:05:57,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-26 01:05:57,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-11-26 01:05:57,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 32 states have (on average 1.59375) internal successors, (51), 32 states have internal predecessors, (51), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-26 01:05:57,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 61 transitions. [2022-11-26 01:05:57,708 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 61 transitions. Word has length 29 [2022-11-26 01:05:57,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:05:57,709 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 61 transitions. [2022-11-26 01:05:57,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-26 01:05:57,710 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 61 transitions. [2022-11-26 01:05:57,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-26 01:05:57,711 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:05:57,711 INFO L195 NwaCegarLoop]: trace histogram [5, 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] [2022-11-26 01:05:57,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 01:05:57,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:05:57,922 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:05:57,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:05:57,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1362070592, now seen corresponding path program 1 times [2022-11-26 01:05:57,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:05:57,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991579160] [2022-11-26 01:05:57,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:57,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:05:58,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:58,606 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-26 01:05:58,606 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:05:58,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991579160] [2022-11-26 01:05:58,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991579160] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:05:58,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491250474] [2022-11-26 01:05:58,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:58,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:05:58,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:05:58,617 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:05:58,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 01:06:00,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:06:00,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-26 01:06:00,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:06:00,215 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-26 01:06:00,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:06:00,272 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-26 01:06:00,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491250474] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:06:00,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [590628311] [2022-11-26 01:06:00,305 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-26 01:06:00,305 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:06:00,318 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:06:00,325 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:06:00,326 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:06:00,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 01:06:00,666 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 17 treesize of output 17 [2022-11-26 01:06:00,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2022-11-26 01:06:01,920 INFO L321 Elim1Store]: treesize reduction 41, result has 26.8 percent of original size [2022-11-26 01:06:01,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 652 treesize of output 659 [2022-11-26 01:06:03,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2022-11-26 01:06:03,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 01:06:03,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 01:06:03,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2022-11-26 01:06:04,812 INFO L321 Elim1Store]: treesize reduction 41, result has 26.8 percent of original size [2022-11-26 01:06:04,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 492 treesize of output 499 [2022-11-26 01:06:06,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2022-11-26 01:06:06,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 01:06:06,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 01:06:07,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2022-11-26 01:06:07,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:07,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 96 [2022-11-26 01:06:08,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2022-11-26 01:06:18,200 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 10 for LOIs [2022-11-26 01:06:18,203 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:06:38,383 WARN L233 SmtUtils]: Spent 5.57s on a formula simplification. DAG size of input: 423 DAG size of output: 417 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:06:51,778 WARN L233 SmtUtils]: Spent 5.88s on a formula simplification. DAG size of input: 426 DAG size of output: 425 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:06:59,356 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1128#(and (<= 1 |ULTIMATE.start_main_~var_93_arg_0~0#1|) (<= 0 |ULTIMATE.start_main_~var_25_arg_0~0#1|) (<= 33554432 |ULTIMATE.start_main_~msb_SORT_234~0#1|) (<= (+ |ULTIMATE.start_main_~mask_SORT_240~0#1| 1) 0) (<= (+ |ULTIMATE.start_main_~mask_SORT_238~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~mask_SORT_240~0#1| 1)) (<= 1023 |ULTIMATE.start_main_~mask_SORT_202~0#1|) (<= 0 (+ |ULTIMATE.start_main_~mask_SORT_244~0#1| 1)) (<= 0 |ULTIMATE.start_main_~var_21~0#1|) (<= 2097152 |ULTIMATE.start_main_~msb_SORT_226~0#1|) (<= |ULTIMATE.start_main_~msb_SORT_216~0#1| 65536) (<= |ULTIMATE.start_main_~msb_SORT_212~0#1| 16384) (<= 2147483648 |ULTIMATE.start_main_~msb_SORT_156~0#1|) (<= |ULTIMATE.start_main_~#state_13~0#1.offset| 0) (<= 4096 |ULTIMATE.start_main_~msb_SORT_208~0#1|) (<= 0 (+ |ULTIMATE.start_main_~mask_SORT_222~0#1| 1)) (<= 7 |ULTIMATE.start_main_~mask_SORT_19~0#1|) (<= 0 |#NULL.base|) (<= |ULTIMATE.start_main_~msb_SORT_214~0#1| 32768) (<= |ULTIMATE.start_main_~msb_SORT_191~0#1| 8) (<= |ULTIMATE.start_main_~msb_SORT_156~0#1| 2147483648) (<= 0 |ULTIMATE.start_main_~#state_249~0#1.offset|) (<= |ULTIMATE.start_main_~msb_SORT_226~0#1| 2097152) (<= |ULTIMATE.start_main_~mask_SORT_200~0#1| 511) (<= |ULTIMATE.start_main_~msb_SORT_197~0#1| 64) (<= 0 (+ |ULTIMATE.start_main_~mask_SORT_232~0#1| 1)) (<= (+ |ULTIMATE.start_main_~mask_SORT_242~0#1| 1) 0) (<= 256 |ULTIMATE.start_main_~msb_SORT_200~0#1|) (<= |ULTIMATE.start_main_~var_24~0#1| 1) (<= 0 |ULTIMATE.start_main_~var_22_arg_0~0#1|) (<= 0 |ULTIMATE.start_main_~#state_13~0#1.base|) (<= 0 |ULTIMATE.start_main_~var_50_arg_1~0#1|) (<= |ULTIMATE.start_main_~var_50_arg_1~0#1| 0) (<= 0 (+ |ULTIMATE.start_main_~mask_SORT_242~0#1| 1)) (<= 0 |ULTIMATE.start_main_~var_508~0#1|) (<= |ULTIMATE.start_main_~var_513~0#1| 3) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_~var_93_arg_0~0#1| 1) (<= 0 |ULTIMATE.start_main_~var_92~0#1|) (<= |ULTIMATE.start_main_~mask_SORT_197~0#1| 127) (<= (+ |ULTIMATE.start_main_~mask_SORT_232~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~var_52_arg_0~0#1|) (<= |ULTIMATE.start_main_~var_83_arg_0~0#1| 1) (<= 0 |ULTIMATE.start_main_~var_51~0#1|) (<= |ULTIMATE.start_main_~mask_SORT_19~0#1| 7) (<= 8192 |ULTIMATE.start_main_~msb_SORT_210~0#1|) (<= 0 (+ |ULTIMATE.start_main_~mask_SORT_236~0#1| 1)) (<= |ULTIMATE.start_main_~var_21~0#1| 1) (<= 0 |ULTIMATE.start_main_~var_30~0#1|) (<= 1024 |ULTIMATE.start_main_~msb_SORT_204~0#1|) (<= |ULTIMATE.start_main_~msb_SORT_234~0#1| 33554432) (<= |ULTIMATE.start_main_~var_25_arg_0~0#1| 1) (<= |ULTIMATE.start_main_~var_16_arg_0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#state_13~0#1.offset|) (<= |ULTIMATE.start_main_~msb_SORT_242~0#1| 536870912) (<= (+ |ULTIMATE.start_main_~mask_SORT_224~0#1| 1) 0) (<= 536870912 |ULTIMATE.start_main_~msb_SORT_242~0#1|) (<= 0 |ULTIMATE.start_main_~#state_249~0#1.base|) (<= |ULTIMATE.start_main_~mask_SORT_206~0#1| 4095) (<= |ULTIMATE.start_main_~var_531~0#1| 1) (<= |ULTIMATE.start_main_~mask_SORT_204~0#1| 2047) (<= 0 |ULTIMATE.start_main_~var_16_arg_0~0#1.offset|) (<= |ULTIMATE.start_main_~mask_SORT_193~0#1| 31) (<= |ULTIMATE.start_main_~var_51~0#1| 1) (<= (+ |ULTIMATE.start_main_~mask_SORT_236~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~var_17_arg_0~0#1.base|) (<= 4 |ULTIMATE.start_main_~msb_SORT_19~0#1|) (<= 1 |ULTIMATE.start_main_~var_77_arg_0~0#1|) (<= 0 (+ |ULTIMATE.start_main_~mask_SORT_220~0#1| 1)) (<= |ULTIMATE.start_main_~mask_SORT_202~0#1| 1023) (<= 32768 |ULTIMATE.start_main_~msb_SORT_214~0#1|) (<= 16777216 |ULTIMATE.start_main_~msb_SORT_232~0#1|) (<= |ULTIMATE.start_main_~#state_249~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~2#1|) (<= |ULTIMATE.start_main_~msb_SORT_228~0#1| 4194304) (<= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~mask_SORT_224~0#1| 1)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~msb_SORT_193~0#1| 16) (<= 131072 |ULTIMATE.start_main_~msb_SORT_218~0#1|) (<= |ULTIMATE.start_main_~msb_SORT_210~0#1| 8192) (<= |ULTIMATE.start_main_~msb_SORT_206~0#1| 2048) (<= |ULTIMATE.start_main_~var_60~0#1| 0) (<= 0 (+ |ULTIMATE.start_main_~mask_SORT_156~0#1| 1)) (<= (+ |ULTIMATE.start_main_~mask_SORT_216~0#1| 1) 0) (<= 134217728 |ULTIMATE.start_main_~msb_SORT_238~0#1|) (<= |ULTIMATE.start_main_~var_89_arg_0~0#1| 1) (<= 0 (+ |ULTIMATE.start_main_~mask_SORT_234~0#1| 1)) (<= |ULTIMATE.start_main_~var_508~0#1| 0) (<= 4194304 |ULTIMATE.start_main_~msb_SORT_228~0#1|) (<= 128 |ULTIMATE.start_main_~msb_SORT_3~0#1|) (<= 64 |ULTIMATE.start_main_~msb_SORT_197~0#1|) (<= 1 |ULTIMATE.start_main_~mask_SORT_1~0#1|) (<= |ULTIMATE.start_main_~var_92~0#1| 1) (<= 1 |ULTIMATE.start_main_~var_83_arg_0~0#1|) (<= |ULTIMATE.start_main_~var_37~0#1| 1) (<= |ULTIMATE.start_main_~var_80_arg_0~0#1| 1) (<= |ULTIMATE.start_main_~var_401~0#1| 0) (<= 0 (+ |ULTIMATE.start_main_~mask_SORT_226~0#1| 1)) (<= |ULTIMATE.start_main_~msb_SORT_202~0#1| 512) (<= |ULTIMATE.start_main_~var_29~0#1| 4) (<= 1 |ULTIMATE.start_main_~state_61~0#1|) (<= |ULTIMATE.start_main_~msb_SORT_11~0#1| 2) (<= 0 |ULTIMATE.start_main_~var_37~0#1|) (<= |ULTIMATE.start_main_~init_62_arg_1~0#1| 1) (<= 65535 |ULTIMATE.start_main_~mask_SORT_214~0#1|) (<= (+ |ULTIMATE.start_main_~mask_SORT_218~0#1| 1) 0) (<= |ULTIMATE.start_main_~mask_SORT_3~0#1| 255) (<= |ULTIMATE.start_main_~var_59~0#1| 1) (<= (+ |ULTIMATE.start_main_~mask_SORT_220~0#1| 1) 0) (<= |ULTIMATE.start_main_~state_61~0#1| 1) (<= 127 |ULTIMATE.start_main_~mask_SORT_197~0#1|) (<= 2 |ULTIMATE.start_main_~var_519~0#1|) (<= 0 |ULTIMATE.start_main_~var_24~0#1|) (<= (+ |ULTIMATE.start_main_~mask_SORT_228~0#1| 1) 0) (<= |ULTIMATE.start_main_~msb_SORT_232~0#1| 16777216) (<= 0 (+ |ULTIMATE.start_main_~mask_SORT_228~0#1| 1)) (<= 2048 |ULTIMATE.start_main_~msb_SORT_206~0#1|) (<= |ULTIMATE.start_main_~var_30_arg_1~0#1| 4) (<= 0 |ULTIMATE.start_main_~#state_15~0#1.offset|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 4 |ULTIMATE.start_main_~var_30_arg_1~0#1|) (<= 67108864 |ULTIMATE.start_main_~msb_SORT_236~0#1|) (<= 262144 |ULTIMATE.start_main_~msb_SORT_220~0#1|) (<= (+ |ULTIMATE.start_main_~mask_SORT_222~0#1| 1) 0) (<= |ULTIMATE.start_main_~msb_SORT_224~0#1| 1048576) (<= 0 |ULTIMATE.start_main_~var_57_arg_1~0#1|) (<= |ULTIMATE.start_main_~var_519~0#1| 2) (<= 511 |ULTIMATE.start_main_~mask_SORT_200~0#1|) (<= |ULTIMATE.start_main_~mask_SORT_195~0#1| 63) (<= 2047 |ULTIMATE.start_main_~mask_SORT_204~0#1|) (<= |ULTIMATE.start_main_~msb_SORT_3~0#1| 128) (<= 4 |ULTIMATE.start_main_~var_29~0#1|) (<= |ULTIMATE.start_main_~mask_SORT_208~0#1| 8191) (<= |ULTIMATE.start_main_~var_17_arg_0~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~var_63_arg_2~0#1|) (<= |ULTIMATE.start_main_~var_38_arg_1~0#1| 1) (<= 1 |ULTIMATE.start_main_~var_63_arg_0~0#1|) (<= 0 |ULTIMATE.start_main_~var_60~0#1|) (<= 1 |ULTIMATE.start_main_~var_59~0#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= |ULTIMATE.start_main_~msb_SORT_204~0#1| 1024) (<= 32 |ULTIMATE.start_main_~msb_SORT_195~0#1|) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~var_80_arg_0~0#1|) (<= (+ |ULTIMATE.start_main_~mask_SORT_230~0#1| 1) 0) (<= 31 |ULTIMATE.start_main_~mask_SORT_193~0#1|) (<= 1 |ULTIMATE.start_main_~var_92_arg_0~0#1|) (<= 8 |ULTIMATE.start_main_~msb_SORT_191~0#1|) (<= |ULTIMATE.start_main_~var_30~0#1| 1) (<= |ULTIMATE.start_main_~var_49~0#1| 0) (<= 268435456 |ULTIMATE.start_main_~msb_SORT_240~0#1|) (<= 0 |ULTIMATE.start_main_~var_17_arg_0~0#1.offset|) (<= |ULTIMATE.start_main_~msb_SORT_222~0#1| 524288) (<= |ULTIMATE.start_main_~mask_SORT_210~0#1| 16383) (<= 4095 |ULTIMATE.start_main_~mask_SORT_206~0#1|) (<= 8388608 |ULTIMATE.start_main_~msb_SORT_230~0#1|) (<= 15 |ULTIMATE.start_main_~mask_SORT_191~0#1|) (<= |ULTIMATE.start_main_~msb_SORT_200~0#1| 256) (<= |ULTIMATE.start_main_~var_63_arg_0~0#1| 1) (<= 2 |ULTIMATE.start_main_~msb_SORT_11~0#1|) (<= |ULTIMATE.start_main_~var_22_arg_0~0#1| 1) (<= 16384 |ULTIMATE.start_main_~msb_SORT_212~0#1|) (<= 16383 |ULTIMATE.start_main_~mask_SORT_210~0#1|) (<= |ULTIMATE.start_main_~msb_SORT_230~0#1| 8388608) (<= |ULTIMATE.start_main_~msb_SORT_208~0#1| 4096) (<= 3 |ULTIMATE.start_main_~mask_SORT_11~0#1|) (<= 63 |ULTIMATE.start_main_~mask_SORT_195~0#1|) (<= |ULTIMATE.start_main_~mask_SORT_191~0#1| 15) (<= |ULTIMATE.start_main_~#state_15~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~var_94_arg_0~0#1|) (<= 1 |ULTIMATE.start_main_~msb_SORT_1~0#1|) (<= (+ |ULTIMATE.start_main_~mask_SORT_226~0#1| 1) 0) (<= 1048576 |ULTIMATE.start_main_~msb_SORT_224~0#1|) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 255 |ULTIMATE.start_main_~mask_SORT_3~0#1|) (<= 0 (+ |ULTIMATE.start_main_~mask_SORT_238~0#1| 1)) (<= (+ |ULTIMATE.start_main_~mask_SORT_156~0#1| 1) 0) (<= |ULTIMATE.start_main_~msb_SORT_240~0#1| 268435456) (<= |ULTIMATE.start_main_~mask_SORT_11~0#1| 3) (<= |ULTIMATE.start_main_~var_77_arg_0~0#1| 1) (<= |ULTIMATE.start_main_~var_57_arg_1~0#1| 1) (<= 0 |ULTIMATE.start_main_~var_49~0#1|) (<= 16 |ULTIMATE.start_main_~msb_SORT_193~0#1|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_main_~var_63_arg_1~0#1|) (<= |ULTIMATE.start_main_~mask_SORT_214~0#1| 65535) (<= 32767 |ULTIMATE.start_main_~mask_SORT_212~0#1|) (<= |ULTIMATE.start_main_~var_92_arg_0~0#1| 1) (<= |ULTIMATE.start_main_~msb_SORT_236~0#1| 67108864) (<= 1 |ULTIMATE.start_main_~init_62_arg_1~0#1|) (<= |ULTIMATE.start_main_~var_56~0#1| 1) (<= |ULTIMATE.start_main_~msb_SORT_1~0#1| 1) (<= |ULTIMATE.start_main_~var_52_arg_0~0#1| 1) (<= 512 |ULTIMATE.start_main_~msb_SORT_202~0#1|) (<= |ULTIMATE.start_main_~msb_SORT_220~0#1| 262144) (<= 0 |ULTIMATE.start_main_~var_401~0#1|) (<= |ULTIMATE.start_main_~mask_SORT_212~0#1| 32767) (<= 8191 |ULTIMATE.start_main_~mask_SORT_208~0#1|) (<= 0 (+ |ULTIMATE.start_main_~mask_SORT_216~0#1| 1)) (<= 0 |ULTIMATE.start_main_~#state_15~0#1.base|) (<= |ULTIMATE.start_main_~msb_SORT_238~0#1| 134217728) (<= 1073741824 |ULTIMATE.start_main_~msb_SORT_244~0#1|) (<= |ULTIMATE.start_main_~msb_SORT_218~0#1| 131072) (<= |ULTIMATE.start_main_~msb_SORT_19~0#1| 4) (<= 0 |#StackHeapBarrier|) (<= 524288 |ULTIMATE.start_main_~msb_SORT_222~0#1|) (<= |ULTIMATE.start_main_~var_94_arg_0~0#1| 1) (<= |ULTIMATE.start_main_~var_63_arg_1~0#1| 0) (<= 0 |ULTIMATE.start_main_~var_38_arg_1~0#1|) (<= (+ |ULTIMATE.start_main_~mask_SORT_244~0#1| 1) 0) (<= 1 |ULTIMATE.start_main_~var_70_arg_0~0#1|) (<= 0 (+ |ULTIMATE.start_main_~mask_SORT_218~0#1| 1)) (<= 3 |ULTIMATE.start_main_~var_513~0#1|) (<= 1 |ULTIMATE.start_main_~var_531~0#1|) (<= |ULTIMATE.start_main_~mask_SORT_1~0#1| 1) (<= 0 (+ |ULTIMATE.start_main_~mask_SORT_230~0#1| 1)) (<= 65536 |ULTIMATE.start_main_~msb_SORT_216~0#1|) (<= 0 |ULTIMATE.start_main_~var_56~0#1|) (<= (+ |ULTIMATE.start_main_~mask_SORT_234~0#1| 1) 0) (<= |ULTIMATE.start_main_~msb_SORT_195~0#1| 32) (<= |ULTIMATE.start_main_~msb_SORT_244~0#1| 1073741824) (<= 0 |ULTIMATE.start_main_~var_16_arg_0~0#1.base|) (<= |ULTIMATE.start_main_~var_70_arg_0~0#1| 1) (<= |ULTIMATE.start_main_~var_63_arg_2~0#1| 1) (<= 1 |ULTIMATE.start_main_~var_89_arg_0~0#1|))' at error location [2022-11-26 01:06:59,356 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:06:59,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:06:59,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 8 [2022-11-26 01:06:59,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643432388] [2022-11-26 01:06:59,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:06:59,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 01:06:59,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:06:59,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 01:06:59,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2022-11-26 01:06:59,360 INFO L87 Difference]: Start difference. First operand 39 states and 61 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-26 01:07:00,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:07:01,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:07:01,119 INFO L93 Difference]: Finished difference Result 78 states and 124 transitions. [2022-11-26 01:07:01,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 01:07:01,120 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 30 [2022-11-26 01:07:01,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:07:01,120 INFO L225 Difference]: With dead ends: 78 [2022-11-26 01:07:01,121 INFO L226 Difference]: Without dead ends: 42 [2022-11-26 01:07:01,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 41.2s TimeCoverageRelationStatistics Valid=168, Invalid=534, Unknown=0, NotChecked=0, Total=702 [2022-11-26 01:07:01,123 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-26 01:07:01,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 60 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-26 01:07:01,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-26 01:07:01,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-11-26 01:07:01,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 35 states have (on average 1.542857142857143) internal successors, (54), 35 states have internal predecessors, (54), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-26 01:07:01,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 64 transitions. [2022-11-26 01:07:01,133 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 64 transitions. Word has length 30 [2022-11-26 01:07:01,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:07:01,133 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 64 transitions. [2022-11-26 01:07:01,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-26 01:07:01,134 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 64 transitions. [2022-11-26 01:07:01,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-26 01:07:01,135 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:07:01,135 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:07:01,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 01:07:01,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:07:01,336 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:07:01,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:07:01,337 INFO L85 PathProgramCache]: Analyzing trace with hash 388566495, now seen corresponding path program 2 times [2022-11-26 01:07:01,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:07:01,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963974861] [2022-11-26 01:07:01,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:07:01,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:07:01,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:07:01,959 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-26 01:07:01,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:07:01,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963974861] [2022-11-26 01:07:01,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963974861] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:07:01,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426945997] [2022-11-26 01:07:01,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 01:07:01,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:07:01,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:07:01,962 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:07:01,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 01:07:03,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-26 01:07:03,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:07:03,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-26 01:07:03,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:07:04,256 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-26 01:07:04,256 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:07:04,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426945997] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:07:04,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:07:04,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2022-11-26 01:07:04,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707519097] [2022-11-26 01:07:04,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:07:04,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 01:07:04,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:07:04,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 01:07:04,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:07:04,275 INFO L87 Difference]: Start difference. First operand 42 states and 64 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-26 01:07:06,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:07:06,840 INFO L93 Difference]: Finished difference Result 83 states and 130 transitions. [2022-11-26 01:07:06,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 01:07:06,841 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2022-11-26 01:07:06,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:07:06,842 INFO L225 Difference]: With dead ends: 83 [2022-11-26 01:07:06,842 INFO L226 Difference]: Without dead ends: 81 [2022-11-26 01:07:06,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-26 01:07:06,844 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 152 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-26 01:07:06,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 71 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-26 01:07:06,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-26 01:07:06,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 54. [2022-11-26 01:07:06,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 42 states have internal predecessors, (61), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 01:07:06,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 81 transitions. [2022-11-26 01:07:06,861 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 81 transitions. Word has length 33 [2022-11-26 01:07:06,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:07:06,862 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 81 transitions. [2022-11-26 01:07:06,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-26 01:07:06,862 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 81 transitions. [2022-11-26 01:07:06,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-26 01:07:06,865 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:07:06,865 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-26 01:07:06,875 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-26 01:07:07,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:07:07,075 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:07:07,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:07:07,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1441109787, now seen corresponding path program 1 times [2022-11-26 01:07:07,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:07:07,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343993399] [2022-11-26 01:07:07,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:07:07,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:07:07,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:07:08,623 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-11-26 01:07:08,623 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:07:08,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343993399] [2022-11-26 01:07:08,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343993399] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:07:08,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208956130] [2022-11-26 01:07:08,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:07:08,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:07:08,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:07:08,627 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:07:08,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 01:07:09,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:07:09,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 2722 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 01:07:09,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:07:09,945 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 62 proven. 1 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-26 01:07:09,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:07:09,996 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-11-26 01:07:09,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208956130] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-26 01:07:09,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:07:09,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2022-11-26 01:07:09,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077885123] [2022-11-26 01:07:09,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:07:09,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:07:09,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:07:09,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:07:10,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:07:10,000 INFO L87 Difference]: Start difference. First operand 54 states and 81 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-26 01:07:10,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:07:10,962 INFO L93 Difference]: Finished difference Result 87 states and 134 transitions. [2022-11-26 01:07:10,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:07:10,963 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 71 [2022-11-26 01:07:10,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:07:10,965 INFO L225 Difference]: With dead ends: 87 [2022-11-26 01:07:10,965 INFO L226 Difference]: Without dead ends: 55 [2022-11-26 01:07:10,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:07:10,966 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-26 01:07:10,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-26 01:07:10,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-26 01:07:10,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-11-26 01:07:10,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 43 states have (on average 1.441860465116279) internal successors, (62), 43 states have internal predecessors, (62), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 01:07:10,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 82 transitions. [2022-11-26 01:07:10,980 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 82 transitions. Word has length 71 [2022-11-26 01:07:10,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:07:10,981 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 82 transitions. [2022-11-26 01:07:10,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-26 01:07:10,982 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 82 transitions. [2022-11-26 01:07:10,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-26 01:07:10,984 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:07:10,984 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-26 01:07:11,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 01:07:11,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:07:11,201 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:07:11,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:07:11,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1283929529, now seen corresponding path program 1 times [2022-11-26 01:07:11,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:07:11,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138079337] [2022-11-26 01:07:11,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:07:11,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:07:11,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:07:12,718 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-26 01:07:12,719 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:07:12,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138079337] [2022-11-26 01:07:12,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138079337] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:07:12,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138968136] [2022-11-26 01:07:12,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:07:12,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:07:12,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:07:12,721 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:07:12,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 01:07:14,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:07:14,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 2729 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 01:07:14,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:07:14,069 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 62 proven. 1 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-26 01:07:14,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:07:14,115 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-11-26 01:07:14,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138968136] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-26 01:07:14,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:07:14,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2022-11-26 01:07:14,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121127387] [2022-11-26 01:07:14,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:07:14,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:07:14,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:07:14,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:07:14,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:07:14,118 INFO L87 Difference]: Start difference. First operand 55 states and 82 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-26 01:07:14,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:07:14,647 INFO L93 Difference]: Finished difference Result 89 states and 136 transitions. [2022-11-26 01:07:14,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:07:14,648 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 72 [2022-11-26 01:07:14,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:07:14,649 INFO L225 Difference]: With dead ends: 89 [2022-11-26 01:07:14,649 INFO L226 Difference]: Without dead ends: 56 [2022-11-26 01:07:14,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:07:14,651 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 01:07:14,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 01:07:14,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-26 01:07:14,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-11-26 01:07:14,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 44 states have internal predecessors, (63), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 01:07:14,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 83 transitions. [2022-11-26 01:07:14,662 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 83 transitions. Word has length 72 [2022-11-26 01:07:14,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:07:14,663 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 83 transitions. [2022-11-26 01:07:14,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-26 01:07:14,663 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 83 transitions. [2022-11-26 01:07:14,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-26 01:07:14,665 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:07:14,665 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1] [2022-11-26 01:07:14,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 01:07:14,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-26 01:07:14,879 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:07:14,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:07:14,879 INFO L85 PathProgramCache]: Analyzing trace with hash -531948443, now seen corresponding path program 1 times [2022-11-26 01:07:14,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:07:14,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962819859] [2022-11-26 01:07:14,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:07:14,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:07:15,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:07:16,104 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-11-26 01:07:16,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:07:16,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962819859] [2022-11-26 01:07:16,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962819859] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:07:16,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850532814] [2022-11-26 01:07:16,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:07:16,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:07:16,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:07:16,111 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:07:16,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 01:07:17,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:07:17,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 2736 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 01:07:17,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:07:17,588 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 62 proven. 1 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-11-26 01:07:17,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:07:17,648 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-11-26 01:07:17,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850532814] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-26 01:07:17,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:07:17,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2022-11-26 01:07:17,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810237288] [2022-11-26 01:07:17,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:07:17,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:07:17,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:07:17,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:07:17,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:07:17,652 INFO L87 Difference]: Start difference. First operand 56 states and 83 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-26 01:07:18,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:07:18,664 INFO L93 Difference]: Finished difference Result 91 states and 138 transitions. [2022-11-26 01:07:18,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:07:18,665 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 73 [2022-11-26 01:07:18,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:07:18,666 INFO L225 Difference]: With dead ends: 91 [2022-11-26 01:07:18,666 INFO L226 Difference]: Without dead ends: 57 [2022-11-26 01:07:18,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:07:18,667 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:07:18,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-26 01:07:18,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-26 01:07:18,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-11-26 01:07:18,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 45 states have (on average 1.4222222222222223) internal successors, (64), 45 states have internal predecessors, (64), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 01:07:18,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 84 transitions. [2022-11-26 01:07:18,681 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 84 transitions. Word has length 73 [2022-11-26 01:07:18,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:07:18,681 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 84 transitions. [2022-11-26 01:07:18,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-26 01:07:18,682 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 84 transitions. [2022-11-26 01:07:18,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-26 01:07:18,683 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:07:18,684 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1] [2022-11-26 01:07:18,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 01:07:18,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-26 01:07:18,898 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:07:18,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:07:18,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1548574988, now seen corresponding path program 1 times [2022-11-26 01:07:18,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:07:18,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455078391] [2022-11-26 01:07:18,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:07:18,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:07:19,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:07:20,149 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-11-26 01:07:20,150 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:07:20,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455078391] [2022-11-26 01:07:20,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455078391] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:07:20,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954512211] [2022-11-26 01:07:20,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:07:20,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:07:20,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:07:20,152 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:07:20,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 01:07:21,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:07:21,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 2743 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 01:07:21,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:07:21,545 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 62 proven. 1 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-26 01:07:21,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:07:21,591 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-26 01:07:21,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954512211] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-26 01:07:21,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:07:21,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2022-11-26 01:07:21,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392881721] [2022-11-26 01:07:21,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:07:21,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:07:21,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:07:21,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:07:21,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:07:21,594 INFO L87 Difference]: Start difference. First operand 57 states and 84 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-26 01:07:22,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:07:22,451 INFO L93 Difference]: Finished difference Result 93 states and 140 transitions. [2022-11-26 01:07:22,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:07:22,452 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 74 [2022-11-26 01:07:22,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:07:22,453 INFO L225 Difference]: With dead ends: 93 [2022-11-26 01:07:22,453 INFO L226 Difference]: Without dead ends: 58 [2022-11-26 01:07:22,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:07:22,454 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-26 01:07:22,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-26 01:07:22,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-26 01:07:22,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-11-26 01:07:22,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 46 states have internal predecessors, (65), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 01:07:22,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 85 transitions. [2022-11-26 01:07:22,465 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 85 transitions. Word has length 74 [2022-11-26 01:07:22,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:07:22,466 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 85 transitions. [2022-11-26 01:07:22,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-26 01:07:22,466 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 85 transitions. [2022-11-26 01:07:22,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-26 01:07:22,468 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:07:22,468 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1] [2022-11-26 01:07:22,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-26 01:07:22,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:07:22,679 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:07:22,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:07:22,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1359662176, now seen corresponding path program 1 times [2022-11-26 01:07:22,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:07:22,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421697038] [2022-11-26 01:07:22,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:07:22,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:07:23,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:07:24,048 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-11-26 01:07:24,049 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:07:24,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421697038] [2022-11-26 01:07:24,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421697038] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:07:24,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867066135] [2022-11-26 01:07:24,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:07:24,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:07:24,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:07:24,051 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:07:24,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-26 01:07:25,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:07:25,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 2750 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 01:07:25,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:07:25,540 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 62 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-26 01:07:25,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:07:25,592 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-11-26 01:07:25,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867066135] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-26 01:07:25,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:07:25,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2022-11-26 01:07:25,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473810948] [2022-11-26 01:07:25,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:07:25,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:07:25,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:07:25,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:07:25,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:07:25,597 INFO L87 Difference]: Start difference. First operand 58 states and 85 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-26 01:07:26,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:07:26,370 INFO L93 Difference]: Finished difference Result 95 states and 142 transitions. [2022-11-26 01:07:26,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:07:26,371 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 75 [2022-11-26 01:07:26,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:07:26,372 INFO L225 Difference]: With dead ends: 95 [2022-11-26 01:07:26,373 INFO L226 Difference]: Without dead ends: 59 [2022-11-26 01:07:26,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:07:26,374 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-26 01:07:26,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-26 01:07:26,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-26 01:07:26,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-11-26 01:07:26,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 47 states have (on average 1.4042553191489362) internal successors, (66), 47 states have internal predecessors, (66), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 01:07:26,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 86 transitions. [2022-11-26 01:07:26,389 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 86 transitions. Word has length 75 [2022-11-26 01:07:26,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:07:26,389 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 86 transitions. [2022-11-26 01:07:26,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-26 01:07:26,390 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 86 transitions. [2022-11-26 01:07:26,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-26 01:07:26,391 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:07:26,392 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1] [2022-11-26 01:07:26,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-26 01:07:26,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-26 01:07:26,599 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:07:26,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:07:26,599 INFO L85 PathProgramCache]: Analyzing trace with hash -990761753, now seen corresponding path program 1 times [2022-11-26 01:07:26,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:07:26,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267561612] [2022-11-26 01:07:26,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:07:26,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:07:26,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:07:27,828 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-11-26 01:07:27,829 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:07:27,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267561612] [2022-11-26 01:07:27,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267561612] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:07:27,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780312044] [2022-11-26 01:07:27,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:07:27,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:07:27,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:07:27,835 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:07:27,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-26 01:07:29,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:07:29,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 2757 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 01:07:29,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:07:29,280 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 62 proven. 4 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-11-26 01:07:29,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:07:29,327 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-11-26 01:07:29,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780312044] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-26 01:07:29,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:07:29,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 7 [2022-11-26 01:07:29,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818873986] [2022-11-26 01:07:29,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:07:29,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:07:29,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:07:29,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:07:29,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:07:29,332 INFO L87 Difference]: Start difference. First operand 59 states and 86 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-26 01:07:30,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:07:30,112 INFO L93 Difference]: Finished difference Result 97 states and 144 transitions. [2022-11-26 01:07:30,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:07:30,114 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 76 [2022-11-26 01:07:30,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:07:30,115 INFO L225 Difference]: With dead ends: 97 [2022-11-26 01:07:30,115 INFO L226 Difference]: Without dead ends: 60 [2022-11-26 01:07:30,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:07:30,116 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-26 01:07:30,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-26 01:07:30,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-26 01:07:30,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-11-26 01:07:30,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 48 states have internal predecessors, (67), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 01:07:30,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 87 transitions. [2022-11-26 01:07:30,140 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 87 transitions. Word has length 76 [2022-11-26 01:07:30,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:07:30,142 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 87 transitions. [2022-11-26 01:07:30,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-26 01:07:30,143 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 87 transitions. [2022-11-26 01:07:30,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-26 01:07:30,151 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:07:30,152 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1] [2022-11-26 01:07:30,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-26 01:07:30,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:07:30,367 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:07:30,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:07:30,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1356481381, now seen corresponding path program 1 times [2022-11-26 01:07:30,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:07:30,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201660237] [2022-11-26 01:07:30,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:07:30,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:07:30,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:07:31,495 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-11-26 01:07:31,496 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:07:31,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201660237] [2022-11-26 01:07:31,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201660237] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:07:31,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714946792] [2022-11-26 01:07:31,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:07:31,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:07:31,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:07:31,499 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:07:31,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-26 01:07:32,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:07:32,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 2764 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 01:07:32,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:07:32,979 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 62 proven. 4 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-26 01:07:32,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:07:33,021 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-11-26 01:07:33,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714946792] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-26 01:07:33,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:07:33,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 7 [2022-11-26 01:07:33,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466879204] [2022-11-26 01:07:33,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:07:33,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:07:33,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:07:33,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:07:33,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:07:33,024 INFO L87 Difference]: Start difference. First operand 60 states and 87 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-26 01:07:33,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:07:33,823 INFO L93 Difference]: Finished difference Result 99 states and 146 transitions. [2022-11-26 01:07:33,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:07:33,823 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 77 [2022-11-26 01:07:33,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:07:33,824 INFO L225 Difference]: With dead ends: 99 [2022-11-26 01:07:33,824 INFO L226 Difference]: Without dead ends: 61 [2022-11-26 01:07:33,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:07:33,825 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-26 01:07:33,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-26 01:07:33,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-11-26 01:07:33,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-11-26 01:07:33,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 49 states have (on average 1.3877551020408163) internal successors, (68), 49 states have internal predecessors, (68), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 01:07:33,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 88 transitions. [2022-11-26 01:07:33,836 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 88 transitions. Word has length 77 [2022-11-26 01:07:33,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:07:33,837 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 88 transitions. [2022-11-26 01:07:33,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-26 01:07:33,837 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 88 transitions. [2022-11-26 01:07:33,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-26 01:07:33,838 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:07:33,839 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2022-11-26 01:07:33,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-26 01:07:34,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-26 01:07:34,039 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:07:34,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:07:34,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1171963248, now seen corresponding path program 1 times [2022-11-26 01:07:34,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:07:34,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075238311] [2022-11-26 01:07:34,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:07:34,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:07:34,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:07:35,258 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-11-26 01:07:35,258 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:07:35,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075238311] [2022-11-26 01:07:35,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075238311] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:07:35,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723823610] [2022-11-26 01:07:35,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:07:35,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:07:35,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:07:35,269 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:07:35,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-26 01:07:36,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:07:36,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 2771 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 01:07:36,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:07:36,812 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 62 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-26 01:07:36,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:07:36,858 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-26 01:07:36,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723823610] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-26 01:07:36,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:07:36,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 7 [2022-11-26 01:07:36,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243853804] [2022-11-26 01:07:36,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:07:36,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:07:36,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:07:36,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:07:36,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:07:36,862 INFO L87 Difference]: Start difference. First operand 61 states and 88 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-26 01:07:38,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:07:38,007 INFO L93 Difference]: Finished difference Result 101 states and 148 transitions. [2022-11-26 01:07:38,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:07:38,008 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 78 [2022-11-26 01:07:38,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:07:38,009 INFO L225 Difference]: With dead ends: 101 [2022-11-26 01:07:38,009 INFO L226 Difference]: Without dead ends: 62 [2022-11-26 01:07:38,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:07:38,011 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:07:38,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-26 01:07:38,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-26 01:07:38,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-11-26 01:07:38,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 50 states have (on average 1.38) internal successors, (69), 50 states have internal predecessors, (69), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 01:07:38,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 89 transitions. [2022-11-26 01:07:38,044 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 89 transitions. Word has length 78 [2022-11-26 01:07:38,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:07:38,045 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 89 transitions. [2022-11-26 01:07:38,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-26 01:07:38,046 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 89 transitions. [2022-11-26 01:07:38,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-26 01:07:38,047 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:07:38,048 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:07:38,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-26 01:07:38,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-26 01:07:38,248 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:07:38,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:07:38,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1295399476, now seen corresponding path program 1 times [2022-11-26 01:07:38,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:07:38,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357793657] [2022-11-26 01:07:38,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:07:38,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:07:38,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:07:39,150 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-11-26 01:07:39,151 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:07:39,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357793657] [2022-11-26 01:07:39,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357793657] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:07:39,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927378203] [2022-11-26 01:07:39,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:07:39,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:07:39,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:07:39,153 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:07:39,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-26 01:07:40,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:07:40,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 2778 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 01:07:40,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:07:40,705 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 62 proven. 4 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-26 01:07:40,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:07:40,757 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-26 01:07:40,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927378203] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-26 01:07:40,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:07:40,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 7 [2022-11-26 01:07:40,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654123518] [2022-11-26 01:07:40,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:07:40,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:07:40,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:07:40,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:07:40,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:07:40,760 INFO L87 Difference]: Start difference. First operand 62 states and 89 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-26 01:07:42,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:07:42,445 INFO L93 Difference]: Finished difference Result 103 states and 150 transitions. [2022-11-26 01:07:42,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:07:42,445 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 79 [2022-11-26 01:07:42,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:07:42,446 INFO L225 Difference]: With dead ends: 103 [2022-11-26 01:07:42,446 INFO L226 Difference]: Without dead ends: 63 [2022-11-26 01:07:42,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:07:42,447 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-26 01:07:42,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-26 01:07:42,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-26 01:07:42,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-11-26 01:07:42,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 51 states have (on average 1.3725490196078431) internal successors, (70), 51 states have internal predecessors, (70), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 01:07:42,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 90 transitions. [2022-11-26 01:07:42,456 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 90 transitions. Word has length 79 [2022-11-26 01:07:42,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:07:42,457 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 90 transitions. [2022-11-26 01:07:42,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-26 01:07:42,457 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 90 transitions. [2022-11-26 01:07:42,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-26 01:07:42,458 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:07:42,458 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:07:42,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-26 01:07:42,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-26 01:07:42,674 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:07:42,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:07:42,675 INFO L85 PathProgramCache]: Analyzing trace with hash -514884718, now seen corresponding path program 1 times [2022-11-26 01:07:42,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:07:42,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193595659] [2022-11-26 01:07:42,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:07:42,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:07:42,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:07:43,550 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-26 01:07:43,550 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:07:43,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193595659] [2022-11-26 01:07:43,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193595659] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:07:43,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092003671] [2022-11-26 01:07:43,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:07:43,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:07:43,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:07:43,555 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:07:43,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-26 01:07:44,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:07:45,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 2785 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 01:07:45,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:07:45,034 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 62 proven. 4 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-26 01:07:45,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:07:45,083 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-11-26 01:07:45,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092003671] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-26 01:07:45,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:07:45,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 7 [2022-11-26 01:07:45,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166889514] [2022-11-26 01:07:45,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:07:45,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:07:45,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:07:45,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:07:45,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:07:45,087 INFO L87 Difference]: Start difference. First operand 63 states and 90 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-26 01:07:46,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:07:46,229 INFO L93 Difference]: Finished difference Result 105 states and 152 transitions. [2022-11-26 01:07:46,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:07:46,230 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 80 [2022-11-26 01:07:46,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:07:46,231 INFO L225 Difference]: With dead ends: 105 [2022-11-26 01:07:46,231 INFO L226 Difference]: Without dead ends: 64 [2022-11-26 01:07:46,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:07:46,232 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:07:46,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-26 01:07:46,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-26 01:07:46,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-11-26 01:07:46,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 52 states have (on average 1.3653846153846154) internal successors, (71), 52 states have internal predecessors, (71), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 01:07:46,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 91 transitions. [2022-11-26 01:07:46,244 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 91 transitions. Word has length 80 [2022-11-26 01:07:46,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:07:46,245 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 91 transitions. [2022-11-26 01:07:46,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-26 01:07:46,245 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 91 transitions. [2022-11-26 01:07:46,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-26 01:07:46,246 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:07:46,247 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:07:46,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-26 01:07:46,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-26 01:07:46,463 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:07:46,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:07:46,463 INFO L85 PathProgramCache]: Analyzing trace with hash -2067092941, now seen corresponding path program 1 times [2022-11-26 01:07:46,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:07:46,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149226128] [2022-11-26 01:07:46,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:07:46,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:07:46,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:07:47,544 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-11-26 01:07:47,544 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:07:47,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149226128] [2022-11-26 01:07:47,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149226128] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:07:47,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059703122] [2022-11-26 01:07:47,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:07:47,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:07:47,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:07:47,555 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:07:47,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-26 01:07:49,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:07:49,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 2792 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 01:07:49,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:07:49,234 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 62 proven. 4 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-26 01:07:49,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:07:49,282 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-26 01:07:49,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059703122] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-26 01:07:49,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:07:49,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 7 [2022-11-26 01:07:49,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270856447] [2022-11-26 01:07:49,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:07:49,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:07:49,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:07:49,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:07:49,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:07:49,286 INFO L87 Difference]: Start difference. First operand 64 states and 91 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-26 01:07:50,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:07:50,421 INFO L93 Difference]: Finished difference Result 107 states and 154 transitions. [2022-11-26 01:07:50,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:07:50,422 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 81 [2022-11-26 01:07:50,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:07:50,422 INFO L225 Difference]: With dead ends: 107 [2022-11-26 01:07:50,422 INFO L226 Difference]: Without dead ends: 65 [2022-11-26 01:07:50,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:07:50,423 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:07:50,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-26 01:07:50,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-26 01:07:50,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-11-26 01:07:50,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 53 states have (on average 1.3584905660377358) internal successors, (72), 53 states have internal predecessors, (72), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 01:07:50,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 92 transitions. [2022-11-26 01:07:50,431 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 92 transitions. Word has length 81 [2022-11-26 01:07:50,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:07:50,432 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 92 transitions. [2022-11-26 01:07:50,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-26 01:07:50,432 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 92 transitions. [2022-11-26 01:07:50,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-26 01:07:50,433 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:07:50,433 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:07:50,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-26 01:07:50,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-26 01:07:50,647 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:07:50,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:07:50,647 INFO L85 PathProgramCache]: Analyzing trace with hash 897469488, now seen corresponding path program 1 times [2022-11-26 01:07:50,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:07:50,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210389588] [2022-11-26 01:07:50,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:07:50,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:07:50,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:07:51,716 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-11-26 01:07:51,717 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:07:51,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210389588] [2022-11-26 01:07:51,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210389588] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:07:51,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165444373] [2022-11-26 01:07:51,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:07:51,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:07:51,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:07:51,719 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:07:51,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-26 01:07:53,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:07:53,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 2799 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 01:07:53,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:07:53,438 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 62 proven. 4 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-26 01:07:53,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:07:53,488 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-11-26 01:07:53,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165444373] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-26 01:07:53,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:07:53,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 7 [2022-11-26 01:07:53,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737630352] [2022-11-26 01:07:53,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:07:53,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:07:53,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:07:53,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:07:53,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:07:53,491 INFO L87 Difference]: Start difference. First operand 65 states and 92 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-26 01:07:54,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:07:54,236 INFO L93 Difference]: Finished difference Result 109 states and 156 transitions. [2022-11-26 01:07:54,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:07:54,236 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 82 [2022-11-26 01:07:54,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:07:54,237 INFO L225 Difference]: With dead ends: 109 [2022-11-26 01:07:54,237 INFO L226 Difference]: Without dead ends: 66 [2022-11-26 01:07:54,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:07:54,238 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-26 01:07:54,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-26 01:07:54,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-26 01:07:54,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-11-26 01:07:54,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 54 states have (on average 1.3518518518518519) internal successors, (73), 54 states have internal predecessors, (73), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 01:07:54,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 93 transitions. [2022-11-26 01:07:54,251 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 93 transitions. Word has length 82 [2022-11-26 01:07:54,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:07:54,251 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 93 transitions. [2022-11-26 01:07:54,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-26 01:07:54,252 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 93 transitions. [2022-11-26 01:07:54,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-26 01:07:54,252 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:07:54,252 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:07:54,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-26 01:07:54,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-26 01:07:54,453 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:07:54,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:07:54,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1477854705, now seen corresponding path program 1 times [2022-11-26 01:07:54,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:07:54,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882123334] [2022-11-26 01:07:54,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:07:54,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:07:54,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:07:55,441 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2022-11-26 01:07:55,442 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:07:55,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882123334] [2022-11-26 01:07:55,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882123334] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:07:55,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404410861] [2022-11-26 01:07:55,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:07:55,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:07:55,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:07:55,443 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:07:55,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-26 01:07:56,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:07:56,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 2806 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 01:07:56,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:07:56,945 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 62 proven. 1 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-26 01:07:56,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:07:56,990 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-26 01:07:56,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404410861] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-26 01:07:56,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:07:56,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2022-11-26 01:07:56,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199232191] [2022-11-26 01:07:56,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:07:56,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:07:56,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:07:56,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:07:56,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:07:56,993 INFO L87 Difference]: Start difference. First operand 66 states and 93 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-26 01:07:57,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:07:57,609 INFO L93 Difference]: Finished difference Result 111 states and 158 transitions. [2022-11-26 01:07:57,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:07:57,610 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 83 [2022-11-26 01:07:57,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:07:57,611 INFO L225 Difference]: With dead ends: 111 [2022-11-26 01:07:57,611 INFO L226 Difference]: Without dead ends: 67 [2022-11-26 01:07:57,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:07:57,613 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 01:07:57,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 01:07:57,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-26 01:07:57,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-11-26 01:07:57,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 55 states have (on average 1.3454545454545455) internal successors, (74), 55 states have internal predecessors, (74), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 01:07:57,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 94 transitions. [2022-11-26 01:07:57,623 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 94 transitions. Word has length 83 [2022-11-26 01:07:57,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:07:57,624 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 94 transitions. [2022-11-26 01:07:57,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-26 01:07:57,624 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 94 transitions. [2022-11-26 01:07:57,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-26 01:07:57,625 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:07:57,625 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:07:57,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-26 01:07:57,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-26 01:07:57,839 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:07:57,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:07:57,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1023712466, now seen corresponding path program 1 times [2022-11-26 01:07:57,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:07:57,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051855398] [2022-11-26 01:07:57,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:07:57,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:07:58,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:07:58,517 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-11-26 01:07:58,517 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:07:58,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051855398] [2022-11-26 01:07:58,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051855398] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:07:58,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931357271] [2022-11-26 01:07:58,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:07:58,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:07:58,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:07:58,518 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:07:58,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-26 01:08:00,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:08:00,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 2813 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 01:08:00,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:08:00,046 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 62 proven. 4 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-26 01:08:00,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:08:00,087 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-11-26 01:08:00,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931357271] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-26 01:08:00,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:08:00,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 7 [2022-11-26 01:08:00,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618982658] [2022-11-26 01:08:00,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:08:00,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:08:00,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:08:00,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:08:00,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:08:00,089 INFO L87 Difference]: Start difference. First operand 67 states and 94 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-26 01:08:00,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:08:00,647 INFO L93 Difference]: Finished difference Result 113 states and 160 transitions. [2022-11-26 01:08:00,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:08:00,648 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 84 [2022-11-26 01:08:00,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:08:00,649 INFO L225 Difference]: With dead ends: 113 [2022-11-26 01:08:00,649 INFO L226 Difference]: Without dead ends: 68 [2022-11-26 01:08:00,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:08:00,650 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 01:08:00,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 01:08:00,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-26 01:08:00,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-11-26 01:08:00,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 56 states have (on average 1.3392857142857142) internal successors, (75), 56 states have internal predecessors, (75), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 01:08:00,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 95 transitions. [2022-11-26 01:08:00,659 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 95 transitions. Word has length 84 [2022-11-26 01:08:00,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:08:00,660 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 95 transitions. [2022-11-26 01:08:00,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-26 01:08:00,660 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 95 transitions. [2022-11-26 01:08:00,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-26 01:08:00,661 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:08:00,661 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:08:00,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-26 01:08:00,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:08:00,878 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:08:00,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:08:00,878 INFO L85 PathProgramCache]: Analyzing trace with hash 2005884612, now seen corresponding path program 1 times [2022-11-26 01:08:00,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:08:00,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292087032] [2022-11-26 01:08:00,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:08:00,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:08:01,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:08:01,575 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-11-26 01:08:01,575 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:08:01,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292087032] [2022-11-26 01:08:01,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292087032] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:08:01,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123708241] [2022-11-26 01:08:01,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:08:01,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:08:01,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:08:01,577 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:08:01,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-26 01:08:03,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:08:03,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 2820 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 01:08:03,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:08:03,199 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 62 proven. 4 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-26 01:08:03,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:08:03,247 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-11-26 01:08:03,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123708241] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-26 01:08:03,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:08:03,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 7 [2022-11-26 01:08:03,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552261823] [2022-11-26 01:08:03,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:08:03,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:08:03,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:08:03,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:08:03,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:08:03,250 INFO L87 Difference]: Start difference. First operand 68 states and 95 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-26 01:08:04,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:08:04,448 INFO L93 Difference]: Finished difference Result 115 states and 162 transitions. [2022-11-26 01:08:04,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:08:04,449 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 85 [2022-11-26 01:08:04,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:08:04,449 INFO L225 Difference]: With dead ends: 115 [2022-11-26 01:08:04,450 INFO L226 Difference]: Without dead ends: 69 [2022-11-26 01:08:04,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:08:04,451 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:08:04,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-26 01:08:04,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-11-26 01:08:04,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-11-26 01:08:04,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 57 states have (on average 1.3333333333333333) internal successors, (76), 57 states have internal predecessors, (76), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 01:08:04,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 96 transitions. [2022-11-26 01:08:04,461 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 96 transitions. Word has length 85 [2022-11-26 01:08:04,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:08:04,462 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 96 transitions. [2022-11-26 01:08:04,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-26 01:08:04,462 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 96 transitions. [2022-11-26 01:08:04,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-26 01:08:04,463 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:08:04,463 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:08:04,482 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-11-26 01:08:04,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:08:04,679 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:08:04,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:08:04,679 INFO L85 PathProgramCache]: Analyzing trace with hash -174363678, now seen corresponding path program 1 times [2022-11-26 01:08:04,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:08:04,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018484566] [2022-11-26 01:08:04,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:08:04,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:08:04,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:08:05,502 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-11-26 01:08:05,502 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:08:05,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018484566] [2022-11-26 01:08:05,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018484566] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:08:05,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396014424] [2022-11-26 01:08:05,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:08:05,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:08:05,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:08:05,504 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:08:05,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ad07be9-ed51-439b-bf09-db9e22af0c5f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-26 01:08:07,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:08:07,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 2827 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-26 01:08:07,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:08:07,425 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-11-26 01:08:07,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:08:07,494 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-11-26 01:08:07,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396014424] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:08:07,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1348461252] [2022-11-26 01:08:07,501 INFO L159 IcfgInterpreter]: Started Sifa with 36 locations of interest [2022-11-26 01:08:07,501 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:08:07,502 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:08:07,502 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:08:07,502 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:08:07,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 01:08:07,679 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 17 treesize of output 17 [2022-11-26 01:08:07,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2022-11-26 01:08:08,318 INFO L321 Elim1Store]: treesize reduction 41, result has 26.8 percent of original size [2022-11-26 01:08:08,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 652 treesize of output 659 [2022-11-26 01:08:09,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2022-11-26 01:08:09,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 01:08:09,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 01:08:09,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2022-11-26 01:08:10,132 INFO L321 Elim1Store]: treesize reduction 41, result has 26.8 percent of original size [2022-11-26 01:08:10,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 492 treesize of output 499 [2022-11-26 01:08:10,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2022-11-26 01:08:11,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 01:08:11,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 01:08:11,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2022-11-26 01:08:12,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:12,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 96 [2022-11-26 01:08:12,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2022-11-26 01:08:20,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 01:08:20,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 01:08:21,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:08:21,216 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-26 01:08:21,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-11-26 01:08:22,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:22,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:22,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:22,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:08:22,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:08:22,708 INFO L321 Elim1Store]: treesize reduction 31, result has 29.5 percent of original size [2022-11-26 01:08:22,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 69 treesize of output 74 [2022-11-26 01:08:23,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:08:23,732 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-26 01:08:23,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-11-26 01:08:24,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-26 01:08:24,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 01:08:24,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 01:08:25,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:25,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:08:25,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:08:25,329 INFO L321 Elim1Store]: treesize reduction 38, result has 49.3 percent of original size [2022-11-26 01:08:25,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 50 treesize of output 67 [2022-11-26 01:08:27,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:08:27,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:28,075 INFO L321 Elim1Store]: treesize reduction 82, result has 58.6 percent of original size [2022-11-26 01:08:28,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 6 case distinctions, treesize of input 249 treesize of output 334 [2022-11-26 01:08:31,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:08:31,526 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-26 01:08:31,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-11-26 01:08:32,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 01:08:32,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-26 01:08:32,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 01:08:33,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:33,508 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:08:33,600 INFO L321 Elim1Store]: treesize reduction 84, result has 18.4 percent of original size [2022-11-26 01:08:33,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 43 [2022-11-26 01:08:36,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:08:36,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:36,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:36,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:08:36,597 INFO L321 Elim1Store]: treesize reduction 256, result has 29.3 percent of original size [2022-11-26 01:08:36,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 466 treesize of output 517 [2022-11-26 01:08:40,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:08:40,646 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-26 01:08:40,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-11-26 01:08:41,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 01:08:41,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-26 01:08:41,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 01:08:42,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:08:43,072 INFO L321 Elim1Store]: treesize reduction 152, result has 43.5 percent of original size [2022-11-26 01:08:43,073 INFO L350 Elim1Store]: Elim1 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 4 new quantified variables, introduced 10 case distinctions, treesize of input 49 treesize of output 133 [2022-11-26 01:08:46,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:08:47,106 INFO L321 Elim1Store]: treesize reduction 112, result has 67.0 percent of original size [2022-11-26 01:08:47,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 272 treesize of output 460 [2022-11-26 01:09:36,986 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 7492 conjuctions. This might take some time... [2022-11-26 01:14:38,715 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 7492 conjuctions. [2022-11-26 01:14:45,122 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 7492 conjuctions. This might take some time... [2022-11-26 01:18:38,892 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 7492 conjuctions. [2022-11-26 01:18:51,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:18:51,535 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-26 01:18:51,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-11-26 01:18:52,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 01:18:52,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 01:18:52,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-26 01:18:53,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:18:53,922 INFO L321 Elim1Store]: treesize reduction 108, result has 34.9 percent of original size [2022-11-26 01:18:53,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 6 case distinctions, treesize of input 38 treesize of output 71 [2022-11-26 01:18:57,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:18:57,259 INFO L321 Elim1Store]: treesize reduction 82, result has 62.4 percent of original size [2022-11-26 01:18:57,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 249 treesize of output 354 [2022-11-26 01:19:03,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:19:03,543 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-26 01:19:03,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-11-26 01:19:04,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-26 01:19:04,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 01:19:04,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 01:19:06,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:19:06,126 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-26 01:19:06,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-11-26 01:19:09,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:19:09,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:19:09,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:19:09,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:19:09,584 INFO L321 Elim1Store]: treesize reduction 31, result has 29.5 percent of original size [2022-11-26 01:19:09,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 74 [2022-11-26 01:19:11,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:19:11,407 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-26 01:19:11,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-11-26 01:19:13,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 01:19:14,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 01:19:14,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-26 01:19:16,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:19:16,471 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-26 01:19:16,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-11-26 01:19:21,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:19:21,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:19:21,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:19:21,035 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:19:21,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:19:21,082 INFO L321 Elim1Store]: treesize reduction 31, result has 29.5 percent of original size [2022-11-26 01:19:21,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 69 treesize of output 74 [2022-11-26 01:19:23,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:19:23,812 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-26 01:19:23,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-11-26 01:19:25,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 01:19:25,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-26 01:19:25,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 01:19:27,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:19:27,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:19:27,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:19:27,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:19:27,211 INFO L321 Elim1Store]: treesize reduction 38, result has 49.3 percent of original size [2022-11-26 01:19:27,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 50 treesize of output 67 [2022-11-26 01:19:33,110 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:19:33,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:19:33,523 INFO L321 Elim1Store]: treesize reduction 82, result has 58.6 percent of original size [2022-11-26 01:19:33,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 6 case distinctions, treesize of input 249 treesize of output 334 [2022-11-26 01:19:38,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:19:38,750 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-26 01:19:38,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-11-26 01:19:40,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-26 01:19:40,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 01:19:40,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 01:19:42,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:19:42,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:19:42,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:19:42,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:19:42,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:19:42,672 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-26 01:19:42,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 55 [2022-11-26 01:19:48,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:19:48,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:19:48,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:19:48,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:19:48,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:19:48,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:19:49,197 INFO L321 Elim1Store]: treesize reduction 218, result has 25.9 percent of original size [2022-11-26 01:19:49,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 485 treesize of output 520 [2022-11-26 01:19:52,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:19:52,849 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-26 01:19:52,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-11-26 01:19:54,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 01:19:54,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 01:19:55,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-26 01:19:56,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:19:56,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:19:56,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:19:56,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:19:56,718 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-26 01:19:56,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 55 [2022-11-26 01:20:03,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:20:03,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:20:03,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:20:03,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:20:03,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:20:03,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:20:03,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:20:04,013 INFO L321 Elim1Store]: treesize reduction 214, result has 14.4 percent of original size [2022-11-26 01:20:04,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 491 treesize of output 486