./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/parallel-ticket-7.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa563c55-75a8-4a1f-8719-8933f238cc71/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa563c55-75a8-4a1f-8719-8933f238cc71/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa563c55-75a8-4a1f-8719-8933f238cc71/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa563c55-75a8-4a1f-8719-8933f238cc71/bin/utaipan-g80aRyZoba/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-ticket-7.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa563c55-75a8-4a1f-8719-8933f238cc71/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa563c55-75a8-4a1f-8719-8933f238cc71/bin/utaipan-g80aRyZoba --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 804a6f1d000a9eac5cab22029525644887c7b13b33bf8b82b475e09952d467ca --- 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-b5237d8 [2022-11-22 02:20:11,192 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 02:20:11,195 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 02:20:11,238 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 02:20:11,242 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 02:20:11,248 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 02:20:11,251 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 02:20:11,255 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 02:20:11,258 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 02:20:11,262 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 02:20:11,264 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 02:20:11,267 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 02:20:11,268 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 02:20:11,276 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 02:20:11,277 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 02:20:11,283 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 02:20:11,283 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 02:20:11,284 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 02:20:11,286 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 02:20:11,290 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 02:20:11,293 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 02:20:11,299 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 02:20:11,300 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 02:20:11,302 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 02:20:11,306 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 02:20:11,309 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 02:20:11,310 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 02:20:11,311 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 02:20:11,313 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 02:20:11,314 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 02:20:11,315 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 02:20:11,316 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 02:20:11,317 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 02:20:11,319 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 02:20:11,321 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 02:20:11,321 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 02:20:11,322 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 02:20:11,322 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 02:20:11,322 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 02:20:11,325 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 02:20:11,325 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 02:20:11,326 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa563c55-75a8-4a1f-8719-8933f238cc71/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-22 02:20:11,399 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 02:20:11,400 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 02:20:11,401 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 02:20:11,401 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 02:20:11,402 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 02:20:11,403 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 02:20:11,403 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 02:20:11,403 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 02:20:11,403 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 02:20:11,404 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 02:20:11,405 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 02:20:11,405 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 02:20:11,406 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 02:20:11,406 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 02:20:11,406 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 02:20:11,406 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 02:20:11,407 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 02:20:11,407 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 02:20:11,408 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-22 02:20:11,408 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-22 02:20:11,409 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 02:20:11,409 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 02:20:11,409 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-22 02:20:11,409 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 02:20:11,410 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 02:20:11,410 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 02:20:11,411 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-22 02:20:11,411 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-22 02:20:11,411 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-22 02:20:11,412 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 02:20:11,412 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-22 02:20:11,412 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 02:20:11,412 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 02:20:11,412 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 02:20:11,413 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 02:20:11,413 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:20:11,413 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 02:20:11,413 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 02:20:11,414 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 02:20:11,414 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 02:20:11,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 02:20:11,414 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 02:20:11,415 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_fa563c55-75a8-4a1f-8719-8933f238cc71/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa563c55-75a8-4a1f-8719-8933f238cc71/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 804a6f1d000a9eac5cab22029525644887c7b13b33bf8b82b475e09952d467ca [2022-11-22 02:20:11,779 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 02:20:11,828 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 02:20:11,831 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 02:20:11,833 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 02:20:11,834 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 02:20:11,835 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa563c55-75a8-4a1f-8719-8933f238cc71/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/weaver/parallel-ticket-7.wvr.c [2022-11-22 02:20:14,964 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 02:20:15,189 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 02:20:15,190 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa563c55-75a8-4a1f-8719-8933f238cc71/sv-benchmarks/c/weaver/parallel-ticket-7.wvr.c [2022-11-22 02:20:15,200 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa563c55-75a8-4a1f-8719-8933f238cc71/bin/utaipan-g80aRyZoba/data/6099516cd/41927c6f71d740b4920372eadf444f05/FLAG052b7b0be [2022-11-22 02:20:15,219 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa563c55-75a8-4a1f-8719-8933f238cc71/bin/utaipan-g80aRyZoba/data/6099516cd/41927c6f71d740b4920372eadf444f05 [2022-11-22 02:20:15,225 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 02:20:15,228 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 02:20:15,229 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 02:20:15,229 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 02:20:15,233 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 02:20:15,234 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:20:15" (1/1) ... [2022-11-22 02:20:15,236 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5942d47b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:20:15, skipping insertion in model container [2022-11-22 02:20:15,236 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:20:15" (1/1) ... [2022-11-22 02:20:15,244 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 02:20:15,281 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:20:15,511 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_fa563c55-75a8-4a1f-8719-8933f238cc71/sv-benchmarks/c/weaver/parallel-ticket-7.wvr.c[4837,4850] [2022-11-22 02:20:15,517 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:20:15,528 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 02:20:15,573 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_fa563c55-75a8-4a1f-8719-8933f238cc71/sv-benchmarks/c/weaver/parallel-ticket-7.wvr.c[4837,4850] [2022-11-22 02:20:15,576 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:20:15,592 INFO L208 MainTranslator]: Completed translation [2022-11-22 02:20:15,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:20:15 WrapperNode [2022-11-22 02:20:15,593 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 02:20:15,594 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 02:20:15,594 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 02:20:15,594 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 02:20:15,602 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:20:15" (1/1) ... [2022-11-22 02:20:15,612 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:20:15" (1/1) ... [2022-11-22 02:20:15,645 INFO L138 Inliner]: procedures = 26, calls = 115, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 318 [2022-11-22 02:20:15,646 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 02:20:15,647 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 02:20:15,647 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 02:20:15,647 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 02:20:15,656 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:20:15" (1/1) ... [2022-11-22 02:20:15,656 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:20:15" (1/1) ... [2022-11-22 02:20:15,662 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:20:15" (1/1) ... [2022-11-22 02:20:15,662 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:20:15" (1/1) ... [2022-11-22 02:20:15,671 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:20:15" (1/1) ... [2022-11-22 02:20:15,674 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:20:15" (1/1) ... [2022-11-22 02:20:15,692 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:20:15" (1/1) ... [2022-11-22 02:20:15,694 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:20:15" (1/1) ... [2022-11-22 02:20:15,698 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 02:20:15,698 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 02:20:15,699 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 02:20:15,699 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 02:20:15,700 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:20:15" (1/1) ... [2022-11-22 02:20:15,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:20:15,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa563c55-75a8-4a1f-8719-8933f238cc71/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:20:15,742 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa563c55-75a8-4a1f-8719-8933f238cc71/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 02:20:15,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa563c55-75a8-4a1f-8719-8933f238cc71/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 02:20:15,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 02:20:15,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 02:20:15,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-22 02:20:15,791 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-22 02:20:15,791 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-22 02:20:15,791 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-22 02:20:15,791 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-22 02:20:15,791 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-22 02:20:15,792 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-22 02:20:15,792 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-22 02:20:15,792 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-11-22 02:20:15,792 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-11-22 02:20:15,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 02:20:15,792 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2022-11-22 02:20:15,793 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2022-11-22 02:20:15,793 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2022-11-22 02:20:15,793 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2022-11-22 02:20:15,793 INFO L130 BoogieDeclarations]: Found specification of procedure thread7 [2022-11-22 02:20:15,793 INFO L138 BoogieDeclarations]: Found implementation of procedure thread7 [2022-11-22 02:20:15,793 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-22 02:20:15,794 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-22 02:20:15,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 02:20:15,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 02:20:15,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 02:20:15,796 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-22 02:20:15,979 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 02:20:15,982 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 02:20:16,790 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 02:20:16,957 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 02:20:16,957 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-22 02:20:16,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:20:16 BoogieIcfgContainer [2022-11-22 02:20:16,960 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 02:20:16,973 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 02:20:16,974 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 02:20:16,977 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 02:20:16,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:20:15" (1/3) ... [2022-11-22 02:20:16,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5064640f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:20:16, skipping insertion in model container [2022-11-22 02:20:16,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:20:15" (2/3) ... [2022-11-22 02:20:16,982 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5064640f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:20:16, skipping insertion in model container [2022-11-22 02:20:16,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:20:16" (3/3) ... [2022-11-22 02:20:16,988 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-ticket-7.wvr.c [2022-11-22 02:20:17,007 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 02:20:17,007 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2022-11-22 02:20:17,008 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-22 02:20:17,171 INFO L144 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2022-11-22 02:20:17,220 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-22 02:20:17,245 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 263 places, 243 transitions, 542 flow [2022-11-22 02:20:17,258 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 263 places, 243 transitions, 542 flow [2022-11-22 02:20:17,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 263 places, 243 transitions, 542 flow [2022-11-22 02:20:17,369 INFO L130 PetriNetUnfolder]: 2/236 cut-off events. [2022-11-22 02:20:17,369 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-22 02:20:17,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 265 conditions, 236 events. 2/236 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 189 event pairs, 0 based on Foata normal form. 0/204 useless extension candidates. Maximal degree in co-relation 173. Up to 2 conditions per place. [2022-11-22 02:20:17,384 INFO L119 LiptonReduction]: Number of co-enabled transitions 5386 [2022-11-22 02:20:36,372 INFO L134 LiptonReduction]: Checked pairs total: 15014 [2022-11-22 02:20:36,372 INFO L136 LiptonReduction]: Total number of compositions: 222 [2022-11-22 02:20:36,382 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 103 places, 81 transitions, 218 flow [2022-11-22 02:20:38,254 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 21863 states, 21833 states have (on average 5.141895296111391) internal successors, (112263), 21862 states have internal predecessors, (112263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:20:38,305 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 02:20:38,312 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@65d66b4c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 02:20:38,312 INFO L358 AbstractCegarLoop]: Starting to check reachability of 37 error locations. [2022-11-22 02:20:38,397 INFO L276 IsEmpty]: Start isEmpty. Operand has 21863 states, 21833 states have (on average 5.141895296111391) internal successors, (112263), 21862 states have internal predecessors, (112263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:20:38,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2022-11-22 02:20:38,402 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:20:38,403 INFO L195 NwaCegarLoop]: trace histogram [1] [2022-11-22 02:20:38,404 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 02:20:38,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:20:38,409 INFO L85 PathProgramCache]: Analyzing trace with hash 992, now seen corresponding path program 1 times [2022-11-22 02:20:38,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:20:38,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685069946] [2022-11-22 02:20:38,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:20:38,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:20:38,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:20:38,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:20:38,537 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:20:38,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685069946] [2022-11-22 02:20:38,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685069946] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:20:38,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:20:38,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-22 02:20:38,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691874461] [2022-11-22 02:20:38,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:20:38,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-22 02:20:38,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:20:38,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-22 02:20:38,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-22 02:20:38,615 INFO L87 Difference]: Start difference. First operand has 21863 states, 21833 states have (on average 5.141895296111391) internal successors, (112263), 21862 states have internal predecessors, (112263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:20:39,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:20:39,660 INFO L93 Difference]: Finished difference Result 21860 states and 112260 transitions. [2022-11-22 02:20:39,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-22 02:20:39,677 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1 [2022-11-22 02:20:39,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:20:40,287 INFO L225 Difference]: With dead ends: 21860 [2022-11-22 02:20:40,287 INFO L226 Difference]: Without dead ends: 21860 [2022-11-22 02:20:40,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 0 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-22 02:20:40,291 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:20:40,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:20:40,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21860 states. [2022-11-22 02:20:41,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21860 to 21860. [2022-11-22 02:20:41,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21860 states, 21833 states have (on average 5.141757889433427) internal successors, (112260), 21859 states have internal predecessors, (112260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:20:42,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21860 states to 21860 states and 112260 transitions. [2022-11-22 02:20:42,444 INFO L78 Accepts]: Start accepts. Automaton has 21860 states and 112260 transitions. Word has length 1 [2022-11-22 02:20:42,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:20:42,446 INFO L495 AbstractCegarLoop]: Abstraction has 21860 states and 112260 transitions. [2022-11-22 02:20:42,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:20:42,453 INFO L276 IsEmpty]: Start isEmpty. Operand 21860 states and 112260 transitions. [2022-11-22 02:20:42,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-22 02:20:42,454 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:20:42,455 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-22 02:20:42,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 02:20:42,459 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 02:20:42,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:20:42,460 INFO L85 PathProgramCache]: Analyzing trace with hash 977735, now seen corresponding path program 1 times [2022-11-22 02:20:42,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:20:42,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418268910] [2022-11-22 02:20:42,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:20:42,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:20:42,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:20:43,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:20:43,749 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:20:43,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418268910] [2022-11-22 02:20:43,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418268910] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:20:43,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:20:43,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 02:20:43,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733045692] [2022-11-22 02:20:43,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:20:43,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:20:43,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:20:43,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:20:43,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:20:43,755 INFO L87 Difference]: Start difference. First operand 21860 states and 112260 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:20:44,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:20:44,365 INFO L93 Difference]: Finished difference Result 21127 states and 108608 transitions. [2022-11-22 02:20:44,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:20:44,366 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-22 02:20:44,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:20:44,544 INFO L225 Difference]: With dead ends: 21127 [2022-11-22 02:20:44,545 INFO L226 Difference]: Without dead ends: 21127 [2022-11-22 02:20:44,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:20:44,548 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 66 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:20:44,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 0 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:20:44,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21127 states. [2022-11-22 02:20:45,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21127 to 21127. [2022-11-22 02:20:45,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21127 states, 21102 states have (on average 5.146810728840868) internal successors, (108608), 21126 states have internal predecessors, (108608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:20:45,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21127 states to 21127 states and 108608 transitions. [2022-11-22 02:20:45,899 INFO L78 Accepts]: Start accepts. Automaton has 21127 states and 108608 transitions. Word has length 3 [2022-11-22 02:20:45,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:20:45,899 INFO L495 AbstractCegarLoop]: Abstraction has 21127 states and 108608 transitions. [2022-11-22 02:20:45,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:20:45,899 INFO L276 IsEmpty]: Start isEmpty. Operand 21127 states and 108608 transitions. [2022-11-22 02:20:45,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-22 02:20:45,900 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:20:45,900 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-22 02:20:45,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 02:20:45,900 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 02:20:45,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:20:45,901 INFO L85 PathProgramCache]: Analyzing trace with hash 977736, now seen corresponding path program 1 times [2022-11-22 02:20:45,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:20:45,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128694370] [2022-11-22 02:20:45,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:20:45,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:20:45,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:20:46,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:20:46,311 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:20:46,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128694370] [2022-11-22 02:20:46,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128694370] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:20:46,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:20:46,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 02:20:46,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660642895] [2022-11-22 02:20:46,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:20:46,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:20:46,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:20:46,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:20:46,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:20:46,314 INFO L87 Difference]: Start difference. First operand 21127 states and 108608 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:20:46,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:20:46,951 INFO L93 Difference]: Finished difference Result 20394 states and 104956 transitions. [2022-11-22 02:20:46,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:20:46,951 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-22 02:20:46,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:20:47,176 INFO L225 Difference]: With dead ends: 20394 [2022-11-22 02:20:47,176 INFO L226 Difference]: Without dead ends: 20394 [2022-11-22 02:20:47,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:20:47,177 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 64 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:20:47,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 0 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:20:47,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20394 states. [2022-11-22 02:20:48,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20394 to 20394. [2022-11-22 02:20:48,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20394 states, 20371 states have (on average 5.152226203917333) internal successors, (104956), 20393 states have internal predecessors, (104956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:20:48,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20394 states to 20394 states and 104956 transitions. [2022-11-22 02:20:48,343 INFO L78 Accepts]: Start accepts. Automaton has 20394 states and 104956 transitions. Word has length 3 [2022-11-22 02:20:48,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:20:48,343 INFO L495 AbstractCegarLoop]: Abstraction has 20394 states and 104956 transitions. [2022-11-22 02:20:48,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:20:48,343 INFO L276 IsEmpty]: Start isEmpty. Operand 20394 states and 104956 transitions. [2022-11-22 02:20:48,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-22 02:20:48,344 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:20:48,344 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-22 02:20:48,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 02:20:48,344 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 02:20:48,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:20:48,345 INFO L85 PathProgramCache]: Analyzing trace with hash 939628544, now seen corresponding path program 1 times [2022-11-22 02:20:48,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:20:48,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307561348] [2022-11-22 02:20:48,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:20:48,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:20:48,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:20:48,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:20:48,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:20:48,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307561348] [2022-11-22 02:20:48,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307561348] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:20:48,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:20:48,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 02:20:48,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478518819] [2022-11-22 02:20:48,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:20:48,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:20:48,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:20:48,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:20:48,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:20:48,696 INFO L87 Difference]: Start difference. First operand 20394 states and 104956 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:20:49,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:20:49,480 INFO L93 Difference]: Finished difference Result 20139 states and 103874 transitions. [2022-11-22 02:20:49,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:20:49,481 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-22 02:20:49,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:20:49,671 INFO L225 Difference]: With dead ends: 20139 [2022-11-22 02:20:49,672 INFO L226 Difference]: Without dead ends: 20139 [2022-11-22 02:20:49,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:20:49,676 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 60 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:20:49,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 0 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:20:49,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20139 states. [2022-11-22 02:20:50,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20139 to 20139. [2022-11-22 02:20:50,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20139 states, 20118 states have (on average 5.1632369022765685) internal successors, (103874), 20138 states have internal predecessors, (103874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:20:50,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20139 states to 20139 states and 103874 transitions. [2022-11-22 02:20:50,693 INFO L78 Accepts]: Start accepts. Automaton has 20139 states and 103874 transitions. Word has length 5 [2022-11-22 02:20:50,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:20:50,694 INFO L495 AbstractCegarLoop]: Abstraction has 20139 states and 103874 transitions. [2022-11-22 02:20:50,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:20:50,695 INFO L276 IsEmpty]: Start isEmpty. Operand 20139 states and 103874 transitions. [2022-11-22 02:20:50,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-22 02:20:50,695 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:20:50,695 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-22 02:20:50,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 02:20:50,696 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 02:20:50,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:20:50,696 INFO L85 PathProgramCache]: Analyzing trace with hash 939628545, now seen corresponding path program 1 times [2022-11-22 02:20:50,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:20:50,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635630948] [2022-11-22 02:20:50,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:20:50,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:20:50,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:20:51,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:20:51,085 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:20:51,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635630948] [2022-11-22 02:20:51,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635630948] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:20:51,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:20:51,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 02:20:51,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117744522] [2022-11-22 02:20:51,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:20:51,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:20:51,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:20:51,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:20:51,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:20:51,088 INFO L87 Difference]: Start difference. First operand 20139 states and 103874 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:20:51,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:20:51,383 INFO L93 Difference]: Finished difference Result 19884 states and 102792 transitions. [2022-11-22 02:20:51,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:20:51,383 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-22 02:20:51,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:20:51,968 INFO L225 Difference]: With dead ends: 19884 [2022-11-22 02:20:51,969 INFO L226 Difference]: Without dead ends: 19884 [2022-11-22 02:20:51,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:20:51,970 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 58 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:20:51,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 0 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:20:52,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19884 states. [2022-11-22 02:20:52,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19884 to 19884. [2022-11-22 02:20:52,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19884 states, 19865 states have (on average 5.174528064434936) internal successors, (102792), 19883 states have internal predecessors, (102792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:20:52,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19884 states to 19884 states and 102792 transitions. [2022-11-22 02:20:52,937 INFO L78 Accepts]: Start accepts. Automaton has 19884 states and 102792 transitions. Word has length 5 [2022-11-22 02:20:52,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:20:52,938 INFO L495 AbstractCegarLoop]: Abstraction has 19884 states and 102792 transitions. [2022-11-22 02:20:52,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:20:52,938 INFO L276 IsEmpty]: Start isEmpty. Operand 19884 states and 102792 transitions. [2022-11-22 02:20:52,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-22 02:20:52,939 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:20:52,939 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:20:52,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 02:20:52,940 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 02:20:52,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:20:52,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1039924088, now seen corresponding path program 1 times [2022-11-22 02:20:52,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:20:52,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875871936] [2022-11-22 02:20:52,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:20:52,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:20:52,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:20:53,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:20:53,232 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:20:53,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875871936] [2022-11-22 02:20:53,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875871936] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:20:53,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:20:53,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 02:20:53,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404828041] [2022-11-22 02:20:53,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:20:53,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:20:53,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:20:53,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:20:53,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:20:53,235 INFO L87 Difference]: Start difference. First operand 19884 states and 102792 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:20:53,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:20:53,511 INFO L93 Difference]: Finished difference Result 19767 states and 102384 transitions. [2022-11-22 02:20:53,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:20:53,512 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-22 02:20:53,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:20:53,621 INFO L225 Difference]: With dead ends: 19767 [2022-11-22 02:20:53,621 INFO L226 Difference]: Without dead ends: 19767 [2022-11-22 02:20:53,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:20:53,622 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 54 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:20:53,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 0 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:20:53,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19767 states. [2022-11-22 02:20:54,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19767 to 19767. [2022-11-22 02:20:54,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19767 states, 19750 states have (on average 5.184) internal successors, (102384), 19766 states have internal predecessors, (102384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:20:54,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19767 states to 19767 states and 102384 transitions. [2022-11-22 02:20:54,647 INFO L78 Accepts]: Start accepts. Automaton has 19767 states and 102384 transitions. Word has length 7 [2022-11-22 02:20:54,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:20:54,648 INFO L495 AbstractCegarLoop]: Abstraction has 19767 states and 102384 transitions. [2022-11-22 02:20:54,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:20:54,648 INFO L276 IsEmpty]: Start isEmpty. Operand 19767 states and 102384 transitions. [2022-11-22 02:20:54,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-22 02:20:54,649 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:20:54,649 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:20:54,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 02:20:54,649 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 02:20:54,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:20:54,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1039924087, now seen corresponding path program 1 times [2022-11-22 02:20:54,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:20:54,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008750459] [2022-11-22 02:20:54,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:20:54,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:20:54,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:20:54,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:20:54,950 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:20:54,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008750459] [2022-11-22 02:20:54,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008750459] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:20:54,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:20:54,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 02:20:54,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389635579] [2022-11-22 02:20:54,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:20:54,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:20:54,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:20:54,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:20:54,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:20:54,952 INFO L87 Difference]: Start difference. First operand 19767 states and 102384 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:20:55,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:20:55,302 INFO L93 Difference]: Finished difference Result 19650 states and 101976 transitions. [2022-11-22 02:20:55,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:20:55,303 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-22 02:20:55,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:20:55,453 INFO L225 Difference]: With dead ends: 19650 [2022-11-22 02:20:55,453 INFO L226 Difference]: Without dead ends: 19650 [2022-11-22 02:20:55,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:20:55,455 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 52 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:20:55,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 0 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:20:55,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19650 states. [2022-11-22 02:20:56,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19650 to 19650. [2022-11-22 02:20:56,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19650 states, 19635 states have (on average 5.193582887700535) internal successors, (101976), 19649 states have internal predecessors, (101976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:20:56,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19650 states to 19650 states and 101976 transitions. [2022-11-22 02:20:56,444 INFO L78 Accepts]: Start accepts. Automaton has 19650 states and 101976 transitions. Word has length 7 [2022-11-22 02:20:56,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:20:56,445 INFO L495 AbstractCegarLoop]: Abstraction has 19650 states and 101976 transitions. [2022-11-22 02:20:56,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:20:56,445 INFO L276 IsEmpty]: Start isEmpty. Operand 19650 states and 101976 transitions. [2022-11-22 02:20:56,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-22 02:20:56,446 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:20:56,446 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:20:56,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-22 02:20:56,446 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 02:20:56,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:20:56,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1360307095, now seen corresponding path program 1 times [2022-11-22 02:20:56,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:20:56,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689662710] [2022-11-22 02:20:56,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:20:56,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:20:56,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:20:56,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:20:56,670 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:20:56,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689662710] [2022-11-22 02:20:56,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689662710] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:20:56,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:20:56,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 02:20:56,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388683319] [2022-11-22 02:20:56,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:20:56,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:20:56,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:20:56,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:20:56,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:20:56,672 INFO L87 Difference]: Start difference. First operand 19650 states and 101976 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:20:57,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:20:57,324 INFO L93 Difference]: Finished difference Result 19515 states and 101490 transitions. [2022-11-22 02:20:57,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:20:57,325 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-22 02:20:57,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:20:57,432 INFO L225 Difference]: With dead ends: 19515 [2022-11-22 02:20:57,432 INFO L226 Difference]: Without dead ends: 19515 [2022-11-22 02:20:57,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:20:57,433 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 48 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:20:57,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 0 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:20:57,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19515 states. [2022-11-22 02:20:57,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19515 to 19515. [2022-11-22 02:20:57,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19515 states, 19502 states have (on average 5.204081632653061) internal successors, (101490), 19514 states have internal predecessors, (101490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:20:58,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19515 states to 19515 states and 101490 transitions. [2022-11-22 02:20:58,001 INFO L78 Accepts]: Start accepts. Automaton has 19515 states and 101490 transitions. Word has length 9 [2022-11-22 02:20:58,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:20:58,001 INFO L495 AbstractCegarLoop]: Abstraction has 19515 states and 101490 transitions. [2022-11-22 02:20:58,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:20:58,002 INFO L276 IsEmpty]: Start isEmpty. Operand 19515 states and 101490 transitions. [2022-11-22 02:20:58,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-22 02:20:58,004 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:20:58,004 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:20:58,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-22 02:20:58,005 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 02:20:58,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:20:58,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1360307094, now seen corresponding path program 1 times [2022-11-22 02:20:58,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:20:58,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150170370] [2022-11-22 02:20:58,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:20:58,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:20:58,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:20:58,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:20:58,165 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:20:58,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150170370] [2022-11-22 02:20:58,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150170370] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:20:58,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:20:58,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 02:20:58,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832954468] [2022-11-22 02:20:58,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:20:58,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:20:58,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:20:58,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:20:58,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:20:58,167 INFO L87 Difference]: Start difference. First operand 19515 states and 101490 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:20:58,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:20:58,782 INFO L93 Difference]: Finished difference Result 19380 states and 101004 transitions. [2022-11-22 02:20:58,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:20:58,783 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-22 02:20:58,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:20:58,905 INFO L225 Difference]: With dead ends: 19380 [2022-11-22 02:20:58,905 INFO L226 Difference]: Without dead ends: 19380 [2022-11-22 02:20:58,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:20:58,906 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 46 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:20:58,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 0 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:20:58,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19380 states. [2022-11-22 02:20:59,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19380 to 19380. [2022-11-22 02:20:59,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19380 states, 19369 states have (on average 5.2147245598637) internal successors, (101004), 19379 states have internal predecessors, (101004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:20:59,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19380 states to 19380 states and 101004 transitions. [2022-11-22 02:20:59,499 INFO L78 Accepts]: Start accepts. Automaton has 19380 states and 101004 transitions. Word has length 9 [2022-11-22 02:20:59,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:20:59,500 INFO L495 AbstractCegarLoop]: Abstraction has 19380 states and 101004 transitions. [2022-11-22 02:20:59,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:20:59,500 INFO L276 IsEmpty]: Start isEmpty. Operand 19380 states and 101004 transitions. [2022-11-22 02:20:59,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-22 02:20:59,502 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:20:59,502 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:20:59,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-22 02:20:59,502 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 02:20:59,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:20:59,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1585034767, now seen corresponding path program 1 times [2022-11-22 02:20:59,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:20:59,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975182217] [2022-11-22 02:20:59,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:20:59,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:20:59,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:20:59,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:20:59,835 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:20:59,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975182217] [2022-11-22 02:20:59,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975182217] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:20:59,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:20:59,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 02:20:59,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234498046] [2022-11-22 02:20:59,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:20:59,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:20:59,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:20:59,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:20:59,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:20:59,837 INFO L87 Difference]: Start difference. First operand 19380 states and 101004 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:00,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:21:00,155 INFO L93 Difference]: Finished difference Result 19047 states and 99552 transitions. [2022-11-22 02:21:00,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:21:00,156 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-22 02:21:00,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:21:00,269 INFO L225 Difference]: With dead ends: 19047 [2022-11-22 02:21:00,269 INFO L226 Difference]: Without dead ends: 19047 [2022-11-22 02:21:00,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:21:00,270 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 42 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:21:00,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 0 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:21:00,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19047 states. [2022-11-22 02:21:00,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19047 to 19047. [2022-11-22 02:21:00,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19047 states, 19038 states have (on average 5.229120705956508) internal successors, (99552), 19046 states have internal predecessors, (99552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:00,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19047 states to 19047 states and 99552 transitions. [2022-11-22 02:21:00,997 INFO L78 Accepts]: Start accepts. Automaton has 19047 states and 99552 transitions. Word has length 11 [2022-11-22 02:21:00,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:21:00,997 INFO L495 AbstractCegarLoop]: Abstraction has 19047 states and 99552 transitions. [2022-11-22 02:21:00,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:00,998 INFO L276 IsEmpty]: Start isEmpty. Operand 19047 states and 99552 transitions. [2022-11-22 02:21:00,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-22 02:21:00,999 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:21:00,999 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:21:01,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-22 02:21:01,000 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 02:21:01,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:21:01,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1585034765, now seen corresponding path program 1 times [2022-11-22 02:21:01,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:21:01,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171167854] [2022-11-22 02:21:01,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:21:01,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:21:01,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:21:01,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:21:01,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:21:01,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171167854] [2022-11-22 02:21:01,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171167854] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:21:01,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:21:01,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 02:21:01,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739850502] [2022-11-22 02:21:01,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:21:01,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:21:01,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:21:01,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:21:01,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:21:01,254 INFO L87 Difference]: Start difference. First operand 19047 states and 99552 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:01,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:21:01,738 INFO L93 Difference]: Finished difference Result 18714 states and 98100 transitions. [2022-11-22 02:21:01,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:21:01,739 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-22 02:21:01,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:21:01,849 INFO L225 Difference]: With dead ends: 18714 [2022-11-22 02:21:01,849 INFO L226 Difference]: Without dead ends: 18714 [2022-11-22 02:21:01,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:21:01,850 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 40 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:21:01,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 0 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:21:01,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18714 states. [2022-11-22 02:21:02,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18714 to 18714. [2022-11-22 02:21:02,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18714 states, 18707 states have (on average 5.24402630031539) internal successors, (98100), 18713 states have internal predecessors, (98100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:02,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18714 states to 18714 states and 98100 transitions. [2022-11-22 02:21:02,366 INFO L78 Accepts]: Start accepts. Automaton has 18714 states and 98100 transitions. Word has length 11 [2022-11-22 02:21:02,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:21:02,366 INFO L495 AbstractCegarLoop]: Abstraction has 18714 states and 98100 transitions. [2022-11-22 02:21:02,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:02,367 INFO L276 IsEmpty]: Start isEmpty. Operand 18714 states and 98100 transitions. [2022-11-22 02:21:02,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-22 02:21:02,368 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:21:02,371 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:21:02,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-22 02:21:02,372 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 02:21:02,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:21:02,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1495003389, now seen corresponding path program 1 times [2022-11-22 02:21:02,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:21:02,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550303169] [2022-11-22 02:21:02,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:21:02,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:21:02,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:21:02,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:21:02,434 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:21:02,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550303169] [2022-11-22 02:21:02,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550303169] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:21:02,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:21:02,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 02:21:02,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421969321] [2022-11-22 02:21:02,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:21:02,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:21:02,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:21:02,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:21:02,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:21:02,436 INFO L87 Difference]: Start difference. First operand 18714 states and 98100 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:02,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:21:02,979 INFO L93 Difference]: Finished difference Result 17739 states and 93154 transitions. [2022-11-22 02:21:02,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:21:02,980 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-22 02:21:02,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:21:03,085 INFO L225 Difference]: With dead ends: 17739 [2022-11-22 02:21:03,086 INFO L226 Difference]: Without dead ends: 17739 [2022-11-22 02:21:03,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:21:03,086 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 36 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:21:03,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 0 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:21:03,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17739 states. [2022-11-22 02:21:03,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17739 to 17739. [2022-11-22 02:21:03,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17739 states, 17734 states have (on average 5.252847637306868) internal successors, (93154), 17738 states have internal predecessors, (93154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:03,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17739 states to 17739 states and 93154 transitions. [2022-11-22 02:21:03,665 INFO L78 Accepts]: Start accepts. Automaton has 17739 states and 93154 transitions. Word has length 13 [2022-11-22 02:21:03,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:21:03,665 INFO L495 AbstractCegarLoop]: Abstraction has 17739 states and 93154 transitions. [2022-11-22 02:21:03,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:03,666 INFO L276 IsEmpty]: Start isEmpty. Operand 17739 states and 93154 transitions. [2022-11-22 02:21:03,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-22 02:21:03,667 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:21:03,668 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:21:03,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-22 02:21:03,668 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 02:21:03,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:21:03,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1495003387, now seen corresponding path program 1 times [2022-11-22 02:21:03,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:21:03,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944919560] [2022-11-22 02:21:03,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:21:03,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:21:03,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:21:03,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:21:03,765 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:21:03,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944919560] [2022-11-22 02:21:03,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944919560] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:21:03,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:21:03,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 02:21:03,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953177343] [2022-11-22 02:21:03,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:21:03,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:21:03,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:21:03,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:21:03,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:21:03,768 INFO L87 Difference]: Start difference. First operand 17739 states and 93154 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:03,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:21:04,000 INFO L93 Difference]: Finished difference Result 16764 states and 88208 transitions. [2022-11-22 02:21:04,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:21:04,000 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-22 02:21:04,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:21:04,084 INFO L225 Difference]: With dead ends: 16764 [2022-11-22 02:21:04,084 INFO L226 Difference]: Without dead ends: 16764 [2022-11-22 02:21:04,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:21:04,085 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 34 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:21:04,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 0 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:21:04,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16764 states. [2022-11-22 02:21:04,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16764 to 16764. [2022-11-22 02:21:04,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16764 states, 16761 states have (on average 5.262693156732892) internal successors, (88208), 16763 states have internal predecessors, (88208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:04,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16764 states to 16764 states and 88208 transitions. [2022-11-22 02:21:04,842 INFO L78 Accepts]: Start accepts. Automaton has 16764 states and 88208 transitions. Word has length 13 [2022-11-22 02:21:04,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:21:04,842 INFO L495 AbstractCegarLoop]: Abstraction has 16764 states and 88208 transitions. [2022-11-22 02:21:04,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:04,843 INFO L276 IsEmpty]: Start isEmpty. Operand 16764 states and 88208 transitions. [2022-11-22 02:21:04,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-22 02:21:04,846 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:21:04,846 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:21:04,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-22 02:21:04,847 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 02:21:04,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:21:04,847 INFO L85 PathProgramCache]: Analyzing trace with hash -2115764654, now seen corresponding path program 1 times [2022-11-22 02:21:04,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:21:04,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704759367] [2022-11-22 02:21:04,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:21:04,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:21:04,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:21:05,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:21:05,276 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:21:05,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704759367] [2022-11-22 02:21:05,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704759367] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:21:05,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:21:05,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 02:21:05,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941247958] [2022-11-22 02:21:05,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:21:05,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-22 02:21:05,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:21:05,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-22 02:21:05,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-11-22 02:21:05,279 INFO L87 Difference]: Start difference. First operand 16764 states and 88208 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:05,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:21:05,477 INFO L93 Difference]: Finished difference Result 13848 states and 71441 transitions. [2022-11-22 02:21:05,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:21:05,478 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-22 02:21:05,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:21:05,538 INFO L225 Difference]: With dead ends: 13848 [2022-11-22 02:21:05,538 INFO L226 Difference]: Without dead ends: 13848 [2022-11-22 02:21:05,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-11-22 02:21:05,539 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 46 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:21:05,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 0 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:21:05,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13848 states. [2022-11-22 02:21:06,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13848 to 13848. [2022-11-22 02:21:06,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13848 states, 13846 states have (on average 5.159685107612307) internal successors, (71441), 13847 states have internal predecessors, (71441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:06,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13848 states to 13848 states and 71441 transitions. [2022-11-22 02:21:06,283 INFO L78 Accepts]: Start accepts. Automaton has 13848 states and 71441 transitions. Word has length 15 [2022-11-22 02:21:06,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:21:06,283 INFO L495 AbstractCegarLoop]: Abstraction has 13848 states and 71441 transitions. [2022-11-22 02:21:06,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:06,284 INFO L276 IsEmpty]: Start isEmpty. Operand 13848 states and 71441 transitions. [2022-11-22 02:21:06,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-22 02:21:06,286 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:21:06,286 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:21:06,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-22 02:21:06,287 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 02:21:06,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:21:06,287 INFO L85 PathProgramCache]: Analyzing trace with hash -2115764653, now seen corresponding path program 1 times [2022-11-22 02:21:06,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:21:06,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55514031] [2022-11-22 02:21:06,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:21:06,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:21:06,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:21:07,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:21:07,454 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:21:07,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55514031] [2022-11-22 02:21:07,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55514031] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:21:07,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:21:07,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 02:21:07,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197717658] [2022-11-22 02:21:07,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:21:07,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 02:21:07,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:21:07,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 02:21:07,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:21:07,457 INFO L87 Difference]: Start difference. First operand 13848 states and 71441 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:07,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:21:07,656 INFO L93 Difference]: Finished difference Result 10932 states and 54674 transitions. [2022-11-22 02:21:07,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:21:07,657 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-22 02:21:07,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:21:07,703 INFO L225 Difference]: With dead ends: 10932 [2022-11-22 02:21:07,703 INFO L226 Difference]: Without dead ends: 10932 [2022-11-22 02:21:07,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:21:07,704 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 80 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:21:07,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 0 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:21:07,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10932 states. [2022-11-22 02:21:08,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10932 to 10932. [2022-11-22 02:21:08,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10932 states, 10931 states have (on average 5.001738175830208) internal successors, (54674), 10931 states have internal predecessors, (54674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:08,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10932 states to 10932 states and 54674 transitions. [2022-11-22 02:21:08,200 INFO L78 Accepts]: Start accepts. Automaton has 10932 states and 54674 transitions. Word has length 15 [2022-11-22 02:21:08,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:21:08,200 INFO L495 AbstractCegarLoop]: Abstraction has 10932 states and 54674 transitions. [2022-11-22 02:21:08,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:08,200 INFO L276 IsEmpty]: Start isEmpty. Operand 10932 states and 54674 transitions. [2022-11-22 02:21:08,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-22 02:21:08,251 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:21:08,251 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:21:08,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-22 02:21:08,251 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 02:21:08,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:21:08,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1694228371, now seen corresponding path program 1 times [2022-11-22 02:21:08,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:21:08,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716993740] [2022-11-22 02:21:08,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:21:08,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:21:08,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:21:09,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:21:09,933 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:21:09,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716993740] [2022-11-22 02:21:09,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716993740] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:21:09,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:21:09,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 02:21:09,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613372462] [2022-11-22 02:21:09,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:21:09,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 02:21:09,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:21:09,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 02:21:09,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:21:09,938 INFO L87 Difference]: Start difference. First operand 10932 states and 54674 transitions. Second operand has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:10,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:21:10,570 INFO L93 Difference]: Finished difference Result 16853 states and 81921 transitions. [2022-11-22 02:21:10,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:21:10,570 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-11-22 02:21:10,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:21:10,648 INFO L225 Difference]: With dead ends: 16853 [2022-11-22 02:21:10,648 INFO L226 Difference]: Without dead ends: 12858 [2022-11-22 02:21:10,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-22 02:21:10,650 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 112 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:21:10,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 0 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:21:10,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12858 states. [2022-11-22 02:21:11,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12858 to 12858. [2022-11-22 02:21:11,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12858 states, 12857 states have (on average 4.872520805786731) internal successors, (62646), 12857 states have internal predecessors, (62646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:11,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12858 states to 12858 states and 62646 transitions. [2022-11-22 02:21:11,132 INFO L78 Accepts]: Start accepts. Automaton has 12858 states and 62646 transitions. Word has length 44 [2022-11-22 02:21:11,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:21:11,133 INFO L495 AbstractCegarLoop]: Abstraction has 12858 states and 62646 transitions. [2022-11-22 02:21:11,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:11,134 INFO L276 IsEmpty]: Start isEmpty. Operand 12858 states and 62646 transitions. [2022-11-22 02:21:11,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-22 02:21:11,181 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:21:11,181 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:21:11,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-22 02:21:11,182 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 02:21:11,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:21:11,183 INFO L85 PathProgramCache]: Analyzing trace with hash 933280433, now seen corresponding path program 2 times [2022-11-22 02:21:11,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:21:11,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404726544] [2022-11-22 02:21:11,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:21:11,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:21:11,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:21:11,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:21:11,660 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:21:11,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404726544] [2022-11-22 02:21:11,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404726544] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:21:11,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:21:11,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:21:11,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884736796] [2022-11-22 02:21:11,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:21:11,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:21:11,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:21:11,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:21:11,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:21:11,662 INFO L87 Difference]: Start difference. First operand 12858 states and 62646 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:12,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:21:12,031 INFO L93 Difference]: Finished difference Result 13338 states and 65716 transitions. [2022-11-22 02:21:12,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:21:12,032 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-11-22 02:21:12,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:21:12,103 INFO L225 Difference]: With dead ends: 13338 [2022-11-22 02:21:12,104 INFO L226 Difference]: Without dead ends: 13338 [2022-11-22 02:21:12,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:21:12,105 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 37 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:21:12,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 0 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:21:12,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13338 states. [2022-11-22 02:21:12,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13338 to 13338. [2022-11-22 02:21:12,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13338 states, 13337 states have (on average 4.9273449801304645) internal successors, (65716), 13337 states have internal predecessors, (65716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:12,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13338 states to 13338 states and 65716 transitions. [2022-11-22 02:21:12,634 INFO L78 Accepts]: Start accepts. Automaton has 13338 states and 65716 transitions. Word has length 44 [2022-11-22 02:21:12,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:21:12,634 INFO L495 AbstractCegarLoop]: Abstraction has 13338 states and 65716 transitions. [2022-11-22 02:21:12,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:12,635 INFO L276 IsEmpty]: Start isEmpty. Operand 13338 states and 65716 transitions. [2022-11-22 02:21:12,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-22 02:21:12,680 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:21:12,680 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:21:12,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-22 02:21:12,681 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 02:21:12,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:21:12,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1046753801, now seen corresponding path program 3 times [2022-11-22 02:21:12,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:21:12,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112005043] [2022-11-22 02:21:12,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:21:12,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:21:12,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:21:13,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:21:13,167 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:21:13,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112005043] [2022-11-22 02:21:13,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112005043] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:21:13,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:21:13,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 02:21:13,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131233394] [2022-11-22 02:21:13,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:21:13,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:21:13,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:21:13,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:21:13,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:21:13,169 INFO L87 Difference]: Start difference. First operand 13338 states and 65716 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:13,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:21:13,658 INFO L93 Difference]: Finished difference Result 13562 states and 66950 transitions. [2022-11-22 02:21:13,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:21:13,659 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-11-22 02:21:13,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:21:13,728 INFO L225 Difference]: With dead ends: 13562 [2022-11-22 02:21:13,729 INFO L226 Difference]: Without dead ends: 13562 [2022-11-22 02:21:13,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:21:13,730 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 45 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:21:13,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 0 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:21:13,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13562 states. [2022-11-22 02:21:14,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13562 to 13562. [2022-11-22 02:21:14,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13562 states, 13561 states have (on average 4.93695155224541) internal successors, (66950), 13561 states have internal predecessors, (66950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:14,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13562 states to 13562 states and 66950 transitions. [2022-11-22 02:21:14,409 INFO L78 Accepts]: Start accepts. Automaton has 13562 states and 66950 transitions. Word has length 44 [2022-11-22 02:21:14,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:21:14,409 INFO L495 AbstractCegarLoop]: Abstraction has 13562 states and 66950 transitions. [2022-11-22 02:21:14,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:14,410 INFO L276 IsEmpty]: Start isEmpty. Operand 13562 states and 66950 transitions. [2022-11-22 02:21:14,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-22 02:21:14,457 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:21:14,458 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:21:14,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-22 02:21:14,458 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 02:21:14,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:21:14,459 INFO L85 PathProgramCache]: Analyzing trace with hash 146163803, now seen corresponding path program 4 times [2022-11-22 02:21:14,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:21:14,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035368679] [2022-11-22 02:21:14,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:21:14,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:21:14,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:21:15,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:21:15,665 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:21:15,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035368679] [2022-11-22 02:21:15,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035368679] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:21:15,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:21:15,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:21:15,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818495468] [2022-11-22 02:21:15,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:21:15,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:21:15,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:21:15,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:21:15,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:21:15,668 INFO L87 Difference]: Start difference. First operand 13562 states and 66950 transitions. Second operand has 6 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:16,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:21:16,455 INFO L93 Difference]: Finished difference Result 17551 states and 84262 transitions. [2022-11-22 02:21:16,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:21:16,456 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-11-22 02:21:16,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:21:16,534 INFO L225 Difference]: With dead ends: 17551 [2022-11-22 02:21:16,534 INFO L226 Difference]: Without dead ends: 13180 [2022-11-22 02:21:16,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:21:16,535 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 114 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:21:16,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 0 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:21:16,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13180 states. [2022-11-22 02:21:17,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13180 to 13180. [2022-11-22 02:21:17,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13180 states, 13179 states have (on average 4.854237802564686) internal successors, (63974), 13179 states have internal predecessors, (63974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:17,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13180 states to 13180 states and 63974 transitions. [2022-11-22 02:21:17,135 INFO L78 Accepts]: Start accepts. Automaton has 13180 states and 63974 transitions. Word has length 44 [2022-11-22 02:21:17,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:21:17,136 INFO L495 AbstractCegarLoop]: Abstraction has 13180 states and 63974 transitions. [2022-11-22 02:21:17,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:17,136 INFO L276 IsEmpty]: Start isEmpty. Operand 13180 states and 63974 transitions. [2022-11-22 02:21:17,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-22 02:21:17,198 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:21:17,198 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:21:17,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-22 02:21:17,198 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 02:21:17,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:21:17,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1630961785, now seen corresponding path program 5 times [2022-11-22 02:21:17,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:21:17,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280039711] [2022-11-22 02:21:17,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:21:17,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:21:17,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:21:17,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:21:17,750 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:21:17,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280039711] [2022-11-22 02:21:17,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280039711] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:21:17,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:21:17,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 02:21:17,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802164775] [2022-11-22 02:21:17,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:21:17,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 02:21:17,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:21:17,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 02:21:17,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-22 02:21:17,752 INFO L87 Difference]: Start difference. First operand 13180 states and 63974 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:18,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:21:18,250 INFO L93 Difference]: Finished difference Result 13416 states and 65130 transitions. [2022-11-22 02:21:18,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 02:21:18,251 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-11-22 02:21:18,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:21:18,329 INFO L225 Difference]: With dead ends: 13416 [2022-11-22 02:21:18,329 INFO L226 Difference]: Without dead ends: 13416 [2022-11-22 02:21:18,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-22 02:21:18,330 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 56 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:21:18,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 0 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 02:21:18,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13416 states. [2022-11-22 02:21:18,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13416 to 13416. [2022-11-22 02:21:18,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13416 states, 13415 states have (on average 4.85501304509877) internal successors, (65130), 13415 states have internal predecessors, (65130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:19,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13416 states to 13416 states and 65130 transitions. [2022-11-22 02:21:19,028 INFO L78 Accepts]: Start accepts. Automaton has 13416 states and 65130 transitions. Word has length 44 [2022-11-22 02:21:19,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:21:19,028 INFO L495 AbstractCegarLoop]: Abstraction has 13416 states and 65130 transitions. [2022-11-22 02:21:19,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:19,028 INFO L276 IsEmpty]: Start isEmpty. Operand 13416 states and 65130 transitions. [2022-11-22 02:21:19,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-22 02:21:19,072 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:21:19,072 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:21:19,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-22 02:21:19,073 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 02:21:19,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:21:19,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1264420513, now seen corresponding path program 6 times [2022-11-22 02:21:19,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:21:19,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524325239] [2022-11-22 02:21:19,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:21:19,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:21:19,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:21:19,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:21:19,488 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:21:19,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524325239] [2022-11-22 02:21:19,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524325239] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:21:19,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:21:19,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-22 02:21:19,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303861135] [2022-11-22 02:21:19,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:21:19,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-22 02:21:19,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:21:19,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-22 02:21:19,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-22 02:21:19,492 INFO L87 Difference]: Start difference. First operand 13416 states and 65130 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:20,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:21:20,332 INFO L93 Difference]: Finished difference Result 19254 states and 95267 transitions. [2022-11-22 02:21:20,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-22 02:21:20,332 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-11-22 02:21:20,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:21:20,434 INFO L225 Difference]: With dead ends: 19254 [2022-11-22 02:21:20,434 INFO L226 Difference]: Without dead ends: 19254 [2022-11-22 02:21:20,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-11-22 02:21:20,435 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 96 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:21:20,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 0 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 824 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 02:21:20,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19254 states. [2022-11-22 02:21:21,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19254 to 14706. [2022-11-22 02:21:21,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14706 states, 14705 states have (on average 4.89194151649099) internal successors, (71936), 14705 states have internal predecessors, (71936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:21,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14706 states to 14706 states and 71936 transitions. [2022-11-22 02:21:21,438 INFO L78 Accepts]: Start accepts. Automaton has 14706 states and 71936 transitions. Word has length 44 [2022-11-22 02:21:21,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:21:21,439 INFO L495 AbstractCegarLoop]: Abstraction has 14706 states and 71936 transitions. [2022-11-22 02:21:21,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:21,440 INFO L276 IsEmpty]: Start isEmpty. Operand 14706 states and 71936 transitions. [2022-11-22 02:21:21,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-22 02:21:21,479 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:21:21,480 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:21:21,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-22 02:21:21,480 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 02:21:21,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:21:21,481 INFO L85 PathProgramCache]: Analyzing trace with hash -769989503, now seen corresponding path program 7 times [2022-11-22 02:21:21,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:21:21,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076079016] [2022-11-22 02:21:21,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:21:21,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:21:21,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:21:21,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:21:21,941 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:21:21,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076079016] [2022-11-22 02:21:21,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076079016] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:21:21,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:21:21,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-22 02:21:21,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279755813] [2022-11-22 02:21:21,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:21:21,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-22 02:21:21,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:21:21,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-22 02:21:21,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-22 02:21:21,944 INFO L87 Difference]: Start difference. First operand 14706 states and 71936 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:23,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:21:23,031 INFO L93 Difference]: Finished difference Result 19614 states and 96732 transitions. [2022-11-22 02:21:23,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-22 02:21:23,031 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-11-22 02:21:23,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:21:23,115 INFO L225 Difference]: With dead ends: 19614 [2022-11-22 02:21:23,115 INFO L226 Difference]: Without dead ends: 19614 [2022-11-22 02:21:23,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2022-11-22 02:21:23,121 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 93 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1195 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-22 02:21:23,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 0 Invalid, 1252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1195 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-22 02:21:23,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19614 states. [2022-11-22 02:21:23,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19614 to 15348. [2022-11-22 02:21:23,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15348 states, 15347 states have (on average 4.905909949827328) internal successors, (75291), 15347 states have internal predecessors, (75291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:23,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15348 states to 15348 states and 75291 transitions. [2022-11-22 02:21:23,952 INFO L78 Accepts]: Start accepts. Automaton has 15348 states and 75291 transitions. Word has length 44 [2022-11-22 02:21:23,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:21:23,952 INFO L495 AbstractCegarLoop]: Abstraction has 15348 states and 75291 transitions. [2022-11-22 02:21:23,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:23,952 INFO L276 IsEmpty]: Start isEmpty. Operand 15348 states and 75291 transitions. [2022-11-22 02:21:23,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-22 02:21:23,997 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:21:23,997 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:21:23,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-22 02:21:23,998 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 02:21:23,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:21:23,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1576896187, now seen corresponding path program 8 times [2022-11-22 02:21:23,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:21:23,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925736577] [2022-11-22 02:21:23,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:21:23,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:21:24,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:21:24,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:21:24,492 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:21:24,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925736577] [2022-11-22 02:21:24,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925736577] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:21:24,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:21:24,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-22 02:21:24,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613451045] [2022-11-22 02:21:24,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:21:24,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-22 02:21:24,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:21:24,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-22 02:21:24,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-11-22 02:21:24,494 INFO L87 Difference]: Start difference. First operand 15348 states and 75291 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:25,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:21:25,696 INFO L93 Difference]: Finished difference Result 16614 states and 81013 transitions. [2022-11-22 02:21:25,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-22 02:21:25,703 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-11-22 02:21:25,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:21:25,763 INFO L225 Difference]: With dead ends: 16614 [2022-11-22 02:21:25,763 INFO L226 Difference]: Without dead ends: 16614 [2022-11-22 02:21:25,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-11-22 02:21:25,763 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 92 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1354 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-22 02:21:25,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 0 Invalid, 1390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1354 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-22 02:21:25,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16614 states. [2022-11-22 02:21:26,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16614 to 16572. [2022-11-22 02:21:26,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16572 states, 16571 states have (on average 4.876833021543661) internal successors, (80814), 16571 states have internal predecessors, (80814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:26,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16572 states to 16572 states and 80814 transitions. [2022-11-22 02:21:26,537 INFO L78 Accepts]: Start accepts. Automaton has 16572 states and 80814 transitions. Word has length 44 [2022-11-22 02:21:26,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:21:26,539 INFO L495 AbstractCegarLoop]: Abstraction has 16572 states and 80814 transitions. [2022-11-22 02:21:26,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:26,540 INFO L276 IsEmpty]: Start isEmpty. Operand 16572 states and 80814 transitions. [2022-11-22 02:21:26,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-22 02:21:26,599 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:21:26,599 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:21:26,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-22 02:21:26,599 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 02:21:26,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:21:26,600 INFO L85 PathProgramCache]: Analyzing trace with hash 429063879, now seen corresponding path program 9 times [2022-11-22 02:21:26,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:21:26,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666497198] [2022-11-22 02:21:26,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:21:26,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:21:26,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:21:27,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:21:27,328 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:21:27,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666497198] [2022-11-22 02:21:27,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666497198] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:21:27,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:21:27,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-22 02:21:27,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509925864] [2022-11-22 02:21:27,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:21:27,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-22 02:21:27,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:21:27,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-22 02:21:27,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-11-22 02:21:27,331 INFO L87 Difference]: Start difference. First operand 16572 states and 80814 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:28,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:21:28,500 INFO L93 Difference]: Finished difference Result 20328 states and 99103 transitions. [2022-11-22 02:21:28,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-22 02:21:28,500 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-11-22 02:21:28,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:21:28,595 INFO L225 Difference]: With dead ends: 20328 [2022-11-22 02:21:28,596 INFO L226 Difference]: Without dead ends: 20304 [2022-11-22 02:21:28,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2022-11-22 02:21:28,597 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 92 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1261 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-22 02:21:28,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 0 Invalid, 1340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1261 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-22 02:21:28,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20304 states. [2022-11-22 02:21:29,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20304 to 16664. [2022-11-22 02:21:29,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16664 states, 16663 states have (on average 4.8647902538558485) internal successors, (81062), 16663 states have internal predecessors, (81062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:29,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16664 states to 16664 states and 81062 transitions. [2022-11-22 02:21:29,411 INFO L78 Accepts]: Start accepts. Automaton has 16664 states and 81062 transitions. Word has length 44 [2022-11-22 02:21:29,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:21:29,411 INFO L495 AbstractCegarLoop]: Abstraction has 16664 states and 81062 transitions. [2022-11-22 02:21:29,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:29,412 INFO L276 IsEmpty]: Start isEmpty. Operand 16664 states and 81062 transitions. [2022-11-22 02:21:29,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-22 02:21:29,445 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:21:29,445 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:21:29,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-22 02:21:29,446 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 02:21:29,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:21:29,446 INFO L85 PathProgramCache]: Analyzing trace with hash -813542549, now seen corresponding path program 10 times [2022-11-22 02:21:29,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:21:29,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402507656] [2022-11-22 02:21:29,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:21:29,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:21:29,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:21:29,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:21:29,893 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:21:29,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402507656] [2022-11-22 02:21:29,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402507656] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:21:29,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:21:29,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-22 02:21:29,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367244585] [2022-11-22 02:21:29,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:21:29,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-22 02:21:29,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:21:29,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-22 02:21:29,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-22 02:21:29,896 INFO L87 Difference]: Start difference. First operand 16664 states and 81062 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:30,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:21:30,858 INFO L93 Difference]: Finished difference Result 21546 states and 104876 transitions. [2022-11-22 02:21:30,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-22 02:21:30,858 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-11-22 02:21:30,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:21:31,195 INFO L225 Difference]: With dead ends: 21546 [2022-11-22 02:21:31,195 INFO L226 Difference]: Without dead ends: 21494 [2022-11-22 02:21:31,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2022-11-22 02:21:31,196 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 100 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-22 02:21:31,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 0 Invalid, 1098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1036 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-22 02:21:31,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21494 states. [2022-11-22 02:21:31,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21494 to 17070. [2022-11-22 02:21:31,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17070 states, 17069 states have (on average 4.859980080848321) internal successors, (82955), 17069 states have internal predecessors, (82955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:31,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17070 states to 17070 states and 82955 transitions. [2022-11-22 02:21:31,670 INFO L78 Accepts]: Start accepts. Automaton has 17070 states and 82955 transitions. Word has length 44 [2022-11-22 02:21:31,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:21:31,670 INFO L495 AbstractCegarLoop]: Abstraction has 17070 states and 82955 transitions. [2022-11-22 02:21:31,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:31,670 INFO L276 IsEmpty]: Start isEmpty. Operand 17070 states and 82955 transitions. [2022-11-22 02:21:31,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-22 02:21:31,709 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:21:31,710 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:21:31,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-22 02:21:31,710 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 02:21:31,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:21:31,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1070897697, now seen corresponding path program 11 times [2022-11-22 02:21:31,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:21:31,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292418548] [2022-11-22 02:21:31,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:21:31,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:21:31,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:21:32,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:21:32,099 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:21:32,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292418548] [2022-11-22 02:21:32,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292418548] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:21:32,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:21:32,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-22 02:21:32,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442943352] [2022-11-22 02:21:32,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:21:32,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-22 02:21:32,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:21:32,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-22 02:21:32,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-22 02:21:32,102 INFO L87 Difference]: Start difference. First operand 17070 states and 82955 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:33,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:21:33,232 INFO L93 Difference]: Finished difference Result 21880 states and 106280 transitions. [2022-11-22 02:21:33,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-22 02:21:33,232 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-11-22 02:21:33,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:21:33,327 INFO L225 Difference]: With dead ends: 21880 [2022-11-22 02:21:33,327 INFO L226 Difference]: Without dead ends: 21828 [2022-11-22 02:21:33,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-11-22 02:21:33,330 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 99 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-22 02:21:33,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 0 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-22 02:21:33,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21828 states. [2022-11-22 02:21:33,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21828 to 17786. [2022-11-22 02:21:33,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17786 states, 17785 states have (on average 4.863030643800956) internal successors, (86489), 17785 states have internal predecessors, (86489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:33,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17786 states to 17786 states and 86489 transitions. [2022-11-22 02:21:33,860 INFO L78 Accepts]: Start accepts. Automaton has 17786 states and 86489 transitions. Word has length 44 [2022-11-22 02:21:33,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:21:33,860 INFO L495 AbstractCegarLoop]: Abstraction has 17786 states and 86489 transitions. [2022-11-22 02:21:33,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:33,860 INFO L276 IsEmpty]: Start isEmpty. Operand 17786 states and 86489 transitions. [2022-11-22 02:21:33,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-22 02:21:33,902 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:21:33,903 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:21:33,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-22 02:21:33,903 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 02:21:33,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:21:33,904 INFO L85 PathProgramCache]: Analyzing trace with hash 404995953, now seen corresponding path program 12 times [2022-11-22 02:21:33,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:21:33,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512664371] [2022-11-22 02:21:33,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:21:33,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:21:34,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:21:34,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:21:34,309 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:21:34,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512664371] [2022-11-22 02:21:34,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512664371] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:21:34,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:21:34,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 02:21:34,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14171924] [2022-11-22 02:21:34,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:21:34,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 02:21:34,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:21:34,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 02:21:34,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-22 02:21:34,311 INFO L87 Difference]: Start difference. First operand 17786 states and 86489 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:35,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:21:35,355 INFO L93 Difference]: Finished difference Result 18326 states and 88287 transitions. [2022-11-22 02:21:35,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 02:21:35,355 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-11-22 02:21:35,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:21:35,440 INFO L225 Difference]: With dead ends: 18326 [2022-11-22 02:21:35,440 INFO L226 Difference]: Without dead ends: 18254 [2022-11-22 02:21:35,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-22 02:21:35,441 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 59 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:21:35,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 0 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 02:21:35,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18254 states. [2022-11-22 02:21:35,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18254 to 17882. [2022-11-22 02:21:35,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17882 states, 17881 states have (on average 4.852357250713047) internal successors, (86765), 17881 states have internal predecessors, (86765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:35,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17882 states to 17882 states and 86765 transitions. [2022-11-22 02:21:35,898 INFO L78 Accepts]: Start accepts. Automaton has 17882 states and 86765 transitions. Word has length 44 [2022-11-22 02:21:35,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:21:35,898 INFO L495 AbstractCegarLoop]: Abstraction has 17882 states and 86765 transitions. [2022-11-22 02:21:35,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:35,899 INFO L276 IsEmpty]: Start isEmpty. Operand 17882 states and 86765 transitions. [2022-11-22 02:21:35,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-22 02:21:35,934 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:21:35,934 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:21:35,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-22 02:21:35,935 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 02:21:35,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:21:35,935 INFO L85 PathProgramCache]: Analyzing trace with hash -498085237, now seen corresponding path program 13 times [2022-11-22 02:21:35,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:21:35,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700002904] [2022-11-22 02:21:35,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:21:35,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:21:36,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:21:36,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:21:36,283 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:21:36,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700002904] [2022-11-22 02:21:36,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700002904] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:21:36,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:21:36,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 02:21:36,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088379761] [2022-11-22 02:21:36,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:21:36,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 02:21:36,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:21:36,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 02:21:36,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-22 02:21:36,285 INFO L87 Difference]: Start difference. First operand 17882 states and 86765 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:36,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:21:36,789 INFO L93 Difference]: Finished difference Result 18254 states and 87691 transitions. [2022-11-22 02:21:36,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 02:21:36,790 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-11-22 02:21:36,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:21:37,116 INFO L225 Difference]: With dead ends: 18254 [2022-11-22 02:21:37,116 INFO L226 Difference]: Without dead ends: 18170 [2022-11-22 02:21:37,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-22 02:21:37,117 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 52 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:21:37,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 0 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 02:21:37,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18170 states. [2022-11-22 02:21:37,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18170 to 17714. [2022-11-22 02:21:37,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17714 states, 17713 states have (on average 4.845424264664371) internal successors, (85827), 17713 states have internal predecessors, (85827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:37,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17714 states to 17714 states and 85827 transitions. [2022-11-22 02:21:37,541 INFO L78 Accepts]: Start accepts. Automaton has 17714 states and 85827 transitions. Word has length 44 [2022-11-22 02:21:37,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:21:37,541 INFO L495 AbstractCegarLoop]: Abstraction has 17714 states and 85827 transitions. [2022-11-22 02:21:37,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:37,541 INFO L276 IsEmpty]: Start isEmpty. Operand 17714 states and 85827 transitions. [2022-11-22 02:21:37,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-22 02:21:37,581 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:21:37,582 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:21:37,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-22 02:21:37,582 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 02:21:37,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:21:37,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1335039333, now seen corresponding path program 14 times [2022-11-22 02:21:37,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:21:37,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408961227] [2022-11-22 02:21:37,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:21:37,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:21:37,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:21:37,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:21:37,959 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:21:37,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408961227] [2022-11-22 02:21:37,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408961227] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:21:37,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:21:37,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 02:21:37,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710040259] [2022-11-22 02:21:37,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:21:37,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 02:21:37,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:21:37,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 02:21:37,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:21:37,961 INFO L87 Difference]: Start difference. First operand 17714 states and 85827 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:38,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:21:38,404 INFO L93 Difference]: Finished difference Result 18198 states and 87363 transitions. [2022-11-22 02:21:38,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:21:38,404 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-11-22 02:21:38,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:21:38,463 INFO L225 Difference]: With dead ends: 18198 [2022-11-22 02:21:38,463 INFO L226 Difference]: Without dead ends: 18058 [2022-11-22 02:21:38,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-22 02:21:38,464 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 43 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:21:38,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 0 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:21:38,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18058 states. [2022-11-22 02:21:39,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18058 to 17710. [2022-11-22 02:21:39,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17710 states, 17709 states have (on average 4.844034106951268) internal successors, (85783), 17709 states have internal predecessors, (85783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:39,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17710 states to 17710 states and 85783 transitions. [2022-11-22 02:21:39,298 INFO L78 Accepts]: Start accepts. Automaton has 17710 states and 85783 transitions. Word has length 44 [2022-11-22 02:21:39,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:21:39,298 INFO L495 AbstractCegarLoop]: Abstraction has 17710 states and 85783 transitions. [2022-11-22 02:21:39,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:39,298 INFO L276 IsEmpty]: Start isEmpty. Operand 17710 states and 85783 transitions. [2022-11-22 02:21:39,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-22 02:21:39,340 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:21:39,340 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:21:39,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-22 02:21:39,341 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 02:21:39,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:21:39,341 INFO L85 PathProgramCache]: Analyzing trace with hash 2021768103, now seen corresponding path program 15 times [2022-11-22 02:21:39,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:21:39,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135380858] [2022-11-22 02:21:39,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:21:39,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:21:39,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:21:39,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:21:39,718 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:21:39,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135380858] [2022-11-22 02:21:39,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135380858] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:21:39,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:21:39,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 02:21:39,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448496518] [2022-11-22 02:21:39,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:21:39,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 02:21:39,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:21:39,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 02:21:39,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:21:39,720 INFO L87 Difference]: Start difference. First operand 17710 states and 85783 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:40,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:21:40,198 INFO L93 Difference]: Finished difference Result 18098 states and 86753 transitions. [2022-11-22 02:21:40,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:21:40,199 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-11-22 02:21:40,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:21:40,286 INFO L225 Difference]: With dead ends: 18098 [2022-11-22 02:21:40,286 INFO L226 Difference]: Without dead ends: 17930 [2022-11-22 02:21:40,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-22 02:21:40,287 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 47 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:21:40,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 0 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:21:40,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17930 states. [2022-11-22 02:21:41,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17930 to 17498. [2022-11-22 02:21:41,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17498 states, 17497 states have (on average 4.845687832199806) internal successors, (84785), 17497 states have internal predecessors, (84785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:41,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17498 states to 17498 states and 84785 transitions. [2022-11-22 02:21:41,231 INFO L78 Accepts]: Start accepts. Automaton has 17498 states and 84785 transitions. Word has length 44 [2022-11-22 02:21:41,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:21:41,231 INFO L495 AbstractCegarLoop]: Abstraction has 17498 states and 84785 transitions. [2022-11-22 02:21:41,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:41,231 INFO L276 IsEmpty]: Start isEmpty. Operand 17498 states and 84785 transitions. [2022-11-22 02:21:41,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-22 02:21:41,275 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:21:41,275 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:21:41,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-11-22 02:21:41,275 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 02:21:41,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:21:41,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1370008539, now seen corresponding path program 16 times [2022-11-22 02:21:41,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:21:41,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542204859] [2022-11-22 02:21:41,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:21:41,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:21:41,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:21:41,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:21:41,685 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:21:41,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542204859] [2022-11-22 02:21:41,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542204859] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:21:41,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:21:41,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 02:21:41,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277379531] [2022-11-22 02:21:41,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:21:41,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 02:21:41,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:21:41,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 02:21:41,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:21:41,687 INFO L87 Difference]: Start difference. First operand 17498 states and 84785 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:42,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:21:42,174 INFO L93 Difference]: Finished difference Result 17626 states and 85041 transitions. [2022-11-22 02:21:42,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:21:42,174 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-11-22 02:21:42,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:21:42,264 INFO L225 Difference]: With dead ends: 17626 [2022-11-22 02:21:42,265 INFO L226 Difference]: Without dead ends: 17562 [2022-11-22 02:21:42,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-22 02:21:42,267 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 41 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:21:42,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 0 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:21:42,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17562 states. [2022-11-22 02:21:43,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17562 to 17334. [2022-11-22 02:21:43,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17334 states, 17333 states have (on average 4.844920094617204) internal successors, (83977), 17333 states have internal predecessors, (83977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:43,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17334 states to 17334 states and 83977 transitions. [2022-11-22 02:21:43,144 INFO L78 Accepts]: Start accepts. Automaton has 17334 states and 83977 transitions. Word has length 44 [2022-11-22 02:21:43,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:21:43,144 INFO L495 AbstractCegarLoop]: Abstraction has 17334 states and 83977 transitions. [2022-11-22 02:21:43,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:43,144 INFO L276 IsEmpty]: Start isEmpty. Operand 17334 states and 83977 transitions. [2022-11-22 02:21:43,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-22 02:21:43,198 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:21:43,198 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:21:43,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-22 02:21:43,199 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 02:21:43,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:21:43,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1773532519, now seen corresponding path program 17 times [2022-11-22 02:21:43,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:21:43,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210257381] [2022-11-22 02:21:43,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:21:43,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:21:43,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat