./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2n_remove_all.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 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_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2n_remove_all.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh --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 bae9bfc842bb010963d083e19e9498cfd3af182f91f0b8fa56907786a4d462dd --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 13:28:41,233 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 13:28:41,234 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 13:28:41,247 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 13:28:41,247 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 13:28:41,248 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 13:28:41,249 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 13:28:41,250 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 13:28:41,251 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 13:28:41,251 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 13:28:41,252 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 13:28:41,252 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 13:28:41,253 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 13:28:41,253 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 13:28:41,254 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 13:28:41,255 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 13:28:41,255 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 13:28:41,256 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 13:28:41,257 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 13:28:41,258 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 13:28:41,259 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 13:28:41,259 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 13:28:41,260 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 13:28:41,261 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 13:28:41,262 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 13:28:41,263 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 13:28:41,263 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 13:28:41,263 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 13:28:41,264 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 13:28:41,264 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 13:28:41,264 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 13:28:41,265 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 13:28:41,265 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 13:28:41,266 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 13:28:41,266 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 13:28:41,266 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 13:28:41,267 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 13:28:41,267 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 13:28:41,267 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 13:28:41,267 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 13:28:41,268 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 13:28:41,269 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 13:28:41,283 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 13:28:41,283 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 13:28:41,283 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 13:28:41,284 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 13:28:41,284 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 13:28:41,284 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 13:28:41,284 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 13:28:41,284 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 13:28:41,285 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 13:28:41,285 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 13:28:41,285 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 13:28:41,285 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 13:28:41,285 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 13:28:41,285 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 13:28:41,285 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 13:28:41,285 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 13:28:41,285 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 13:28:41,286 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 13:28:41,286 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 13:28:41,286 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 13:28:41,286 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 13:28:41,286 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 13:28:41,287 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 13:28:41,287 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 13:28:41,287 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 13:28:41,287 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 13:28:41,287 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 13:28:41,287 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 13:28:41,287 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 13:28:41,287 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 13:28:41,287 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 13:28:41,288 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 13:28:41,288 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 13:28:41,288 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 13:28:41,288 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 13:28:41,288 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:28:41,288 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 13:28:41,288 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 13:28:41,288 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 13:28:41,288 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 13:28:41,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 13:28:41,289 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 13:28:41,289 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_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bae9bfc842bb010963d083e19e9498cfd3af182f91f0b8fa56907786a4d462dd [2022-12-14 13:28:41,463 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 13:28:41,481 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 13:28:41,483 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 13:28:41,483 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 13:28:41,484 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 13:28:41,484 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/list-simple/sll2n_remove_all.i [2022-12-14 13:28:44,109 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 13:28:44,293 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 13:28:44,293 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/sv-benchmarks/c/list-simple/sll2n_remove_all.i [2022-12-14 13:28:44,300 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/data/ae1f858bd/953d53c1a24c46098e81fe47b19c53df/FLAGca3f0ed69 [2022-12-14 13:28:44,311 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/data/ae1f858bd/953d53c1a24c46098e81fe47b19c53df [2022-12-14 13:28:44,312 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 13:28:44,314 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 13:28:44,315 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 13:28:44,315 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 13:28:44,317 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 13:28:44,318 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:28:44" (1/1) ... [2022-12-14 13:28:44,319 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2616b8b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:28:44, skipping insertion in model container [2022-12-14 13:28:44,319 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:28:44" (1/1) ... [2022-12-14 13:28:44,324 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 13:28:44,350 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 13:28:44,582 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_6704424e-7604-42ee-a27a-771e46f442cd/sv-benchmarks/c/list-simple/sll2n_remove_all.i[23806,23819] [2022-12-14 13:28:44,584 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:28:44,593 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 13:28:44,626 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_6704424e-7604-42ee-a27a-771e46f442cd/sv-benchmarks/c/list-simple/sll2n_remove_all.i[23806,23819] [2022-12-14 13:28:44,626 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:28:44,645 INFO L208 MainTranslator]: Completed translation [2022-12-14 13:28:44,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:28:44 WrapperNode [2022-12-14 13:28:44,645 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 13:28:44,646 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 13:28:44,646 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 13:28:44,646 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 13:28:44,652 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:28:44" (1/1) ... [2022-12-14 13:28:44,662 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:28:44" (1/1) ... [2022-12-14 13:28:44,679 INFO L138 Inliner]: procedures = 126, calls = 25, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 86 [2022-12-14 13:28:44,679 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 13:28:44,680 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 13:28:44,680 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 13:28:44,680 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 13:28:44,689 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:28:44" (1/1) ... [2022-12-14 13:28:44,689 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:28:44" (1/1) ... [2022-12-14 13:28:44,692 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:28:44" (1/1) ... [2022-12-14 13:28:44,692 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:28:44" (1/1) ... [2022-12-14 13:28:44,698 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:28:44" (1/1) ... [2022-12-14 13:28:44,701 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:28:44" (1/1) ... [2022-12-14 13:28:44,702 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:28:44" (1/1) ... [2022-12-14 13:28:44,703 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:28:44" (1/1) ... [2022-12-14 13:28:44,706 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 13:28:44,707 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 13:28:44,707 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 13:28:44,707 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 13:28:44,707 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:28:44" (1/1) ... [2022-12-14 13:28:44,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:28:44,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:28:44,728 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 13:28:44,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 13:28:44,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 13:28:44,759 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 13:28:44,759 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 13:28:44,759 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 13:28:44,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-14 13:28:44,759 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-14 13:28:44,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 13:28:44,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-14 13:28:44,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 13:28:44,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 13:28:44,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 13:28:44,845 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 13:28:44,846 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 13:28:44,994 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 13:28:45,023 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 13:28:45,023 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 13:28:45,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:28:45 BoogieIcfgContainer [2022-12-14 13:28:45,025 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 13:28:45,027 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 13:28:45,027 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 13:28:45,029 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 13:28:45,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:28:44" (1/3) ... [2022-12-14 13:28:45,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63fae1d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:28:45, skipping insertion in model container [2022-12-14 13:28:45,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:28:44" (2/3) ... [2022-12-14 13:28:45,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63fae1d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:28:45, skipping insertion in model container [2022-12-14 13:28:45,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:28:45" (3/3) ... [2022-12-14 13:28:45,031 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2n_remove_all.i [2022-12-14 13:28:45,044 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 13:28:45,045 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2022-12-14 13:28:45,075 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 13:28:45,080 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;@27428227, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 13:28:45,080 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2022-12-14 13:28:45,083 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 40 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) [2022-12-14 13:28:45,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 13:28:45,087 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:28:45,088 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 13:28:45,088 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 13:28:45,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:28:45,092 INFO L85 PathProgramCache]: Analyzing trace with hash 3824079, now seen corresponding path program 1 times [2022-12-14 13:28:45,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:28:45,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989992984] [2022-12-14 13:28:45,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:28:45,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:28:45,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:28:45,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:28:45,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:28:45,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989992984] [2022-12-14 13:28:45,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989992984] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:28:45,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:28:45,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:28:45,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560372505] [2022-12-14 13:28:45,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:28:45,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:28:45,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:28:45,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:28:45,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:28:45,333 INFO L87 Difference]: Start difference. First operand has 41 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 40 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) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:28:45,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:28:45,370 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2022-12-14 13:28:45,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:28:45,372 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2022-12-14 13:28:45,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:28:45,378 INFO L225 Difference]: With dead ends: 53 [2022-12-14 13:28:45,378 INFO L226 Difference]: Without dead ends: 50 [2022-12-14 13:28:45,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:28:45,381 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 12 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:28:45,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 68 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:28:45,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-12-14 13:28:45,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 40. [2022-12-14 13:28:45,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 39 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:28:45,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2022-12-14 13:28:45,404 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 4 [2022-12-14 13:28:45,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:28:45,404 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2022-12-14 13:28:45,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:28:45,404 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2022-12-14 13:28:45,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 13:28:45,405 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:28:45,405 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 13:28:45,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 13:28:45,405 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 13:28:45,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:28:45,406 INFO L85 PathProgramCache]: Analyzing trace with hash 3734000, now seen corresponding path program 1 times [2022-12-14 13:28:45,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:28:45,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278503792] [2022-12-14 13:28:45,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:28:45,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:28:45,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:28:45,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:28:45,452 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:28:45,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278503792] [2022-12-14 13:28:45,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278503792] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:28:45,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:28:45,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:28:45,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904803068] [2022-12-14 13:28:45,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:28:45,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:28:45,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:28:45,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:28:45,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:28:45,455 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:28:45,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:28:45,502 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2022-12-14 13:28:45,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:28:45,503 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2022-12-14 13:28:45,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:28:45,504 INFO L225 Difference]: With dead ends: 60 [2022-12-14 13:28:45,504 INFO L226 Difference]: Without dead ends: 60 [2022-12-14 13:28:45,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:28:45,506 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 29 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:28:45,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 28 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:28:45,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-12-14 13:28:45,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 38. [2022-12-14 13:28:45,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 37 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:28:45,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2022-12-14 13:28:45,512 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 4 [2022-12-14 13:28:45,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:28:45,512 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2022-12-14 13:28:45,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:28:45,513 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2022-12-14 13:28:45,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 13:28:45,513 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:28:45,513 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 13:28:45,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 13:28:45,514 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 13:28:45,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:28:45,514 INFO L85 PathProgramCache]: Analyzing trace with hash 3734001, now seen corresponding path program 1 times [2022-12-14 13:28:45,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:28:45,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668005087] [2022-12-14 13:28:45,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:28:45,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:28:45,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:28:45,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:28:45,589 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:28:45,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668005087] [2022-12-14 13:28:45,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668005087] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:28:45,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:28:45,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:28:45,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416177618] [2022-12-14 13:28:45,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:28:45,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:28:45,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:28:45,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:28:45,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:28:45,592 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:28:45,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:28:45,618 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2022-12-14 13:28:45,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:28:45,619 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2022-12-14 13:28:45,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:28:45,620 INFO L225 Difference]: With dead ends: 36 [2022-12-14 13:28:45,620 INFO L226 Difference]: Without dead ends: 36 [2022-12-14 13:28:45,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:28:45,621 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:28:45,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 18 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:28:45,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-12-14 13:28:45,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-12-14 13:28:45,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 35 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:28:45,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2022-12-14 13:28:45,626 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 4 [2022-12-14 13:28:45,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:28:45,626 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2022-12-14 13:28:45,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:28:45,626 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2022-12-14 13:28:45,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 13:28:45,627 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:28:45,627 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 13:28:45,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 13:28:45,627 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 13:28:45,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:28:45,628 INFO L85 PathProgramCache]: Analyzing trace with hash -706591284, now seen corresponding path program 1 times [2022-12-14 13:28:45,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:28:45,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074219785] [2022-12-14 13:28:45,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:28:45,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:28:45,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:28:45,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:28:45,691 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:28:45,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074219785] [2022-12-14 13:28:45,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074219785] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:28:45,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:28:45,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:28:45,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505442365] [2022-12-14 13:28:45,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:28:45,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:28:45,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:28:45,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:28:45,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:28:45,693 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:28:45,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:28:45,764 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2022-12-14 13:28:45,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:28:45,764 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 13:28:45,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:28:45,765 INFO L225 Difference]: With dead ends: 60 [2022-12-14 13:28:45,765 INFO L226 Difference]: Without dead ends: 60 [2022-12-14 13:28:45,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:28:45,766 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 52 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:28:45,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 39 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:28:45,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-12-14 13:28:45,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 35. [2022-12-14 13:28:45,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 19 states have (on average 1.894736842105263) internal successors, (36), 34 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:28:45,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2022-12-14 13:28:45,771 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 6 [2022-12-14 13:28:45,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:28:45,771 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2022-12-14 13:28:45,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:28:45,771 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2022-12-14 13:28:45,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 13:28:45,772 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:28:45,772 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 13:28:45,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 13:28:45,772 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 13:28:45,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:28:45,773 INFO L85 PathProgramCache]: Analyzing trace with hash -706591283, now seen corresponding path program 1 times [2022-12-14 13:28:45,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:28:45,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666948575] [2022-12-14 13:28:45,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:28:45,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:28:45,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:28:45,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:28:45,885 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:28:45,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666948575] [2022-12-14 13:28:45,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666948575] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:28:45,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:28:45,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:28:45,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513691602] [2022-12-14 13:28:45,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:28:45,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:28:45,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:28:45,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:28:45,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:28:45,887 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:28:45,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:28:45,929 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2022-12-14 13:28:45,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:28:45,930 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 13:28:45,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:28:45,930 INFO L225 Difference]: With dead ends: 37 [2022-12-14 13:28:45,930 INFO L226 Difference]: Without dead ends: 37 [2022-12-14 13:28:45,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:28:45,932 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 61 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:28:45,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 17 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:28:45,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-12-14 13:28:45,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2022-12-14 13:28:45,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 33 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:28:45,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2022-12-14 13:28:45,935 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 6 [2022-12-14 13:28:45,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:28:45,936 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2022-12-14 13:28:45,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:28:45,936 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2022-12-14 13:28:45,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 13:28:45,936 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:28:45,937 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:28:45,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 13:28:45,937 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 13:28:45,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:28:45,938 INFO L85 PathProgramCache]: Analyzing trace with hash -424097956, now seen corresponding path program 1 times [2022-12-14 13:28:45,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:28:45,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263240156] [2022-12-14 13:28:45,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:28:45,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:28:45,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:28:45,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:28:45,996 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:28:45,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263240156] [2022-12-14 13:28:45,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263240156] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:28:45,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:28:45,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:28:45,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119265943] [2022-12-14 13:28:45,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:28:45,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:28:45,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:28:45,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:28:45,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:28:45,998 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 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) [2022-12-14 13:28:46,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:28:46,018 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2022-12-14 13:28:46,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:28:46,019 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 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 [2022-12-14 13:28:46,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:28:46,019 INFO L225 Difference]: With dead ends: 53 [2022-12-14 13:28:46,019 INFO L226 Difference]: Without dead ends: 53 [2022-12-14 13:28:46,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:28:46,020 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 65 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:28:46,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 52 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:28:46,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-12-14 13:28:46,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 35. [2022-12-14 13:28:46,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.8) internal successors, (36), 34 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:28:46,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2022-12-14 13:28:46,023 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 9 [2022-12-14 13:28:46,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:28:46,023 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2022-12-14 13:28:46,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 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) [2022-12-14 13:28:46,023 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2022-12-14 13:28:46,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 13:28:46,024 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:28:46,024 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:28:46,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 13:28:46,024 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 13:28:46,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:28:46,024 INFO L85 PathProgramCache]: Analyzing trace with hash -424099625, now seen corresponding path program 1 times [2022-12-14 13:28:46,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:28:46,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221456669] [2022-12-14 13:28:46,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:28:46,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:28:46,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:28:46,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:28:46,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:28:46,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221456669] [2022-12-14 13:28:46,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221456669] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:28:46,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010645057] [2022-12-14 13:28:46,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:28:46,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:28:46,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:28:46,074 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:28:46,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 13:28:46,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:28:46,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 13:28:46,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:28:46,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:28:46,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:28:46,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:28:46,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010645057] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:28:46,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [277700407] [2022-12-14 13:28:46,219 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:28:46,220 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:28:46,223 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:28:46,226 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:28:46,227 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:28:46,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:46,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:46,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 13:28:46,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:46,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:46,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:46,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:46,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:46,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-12-14 13:28:46,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 13:28:46,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:46,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-12-14 13:28:46,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 13:28:46,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:46,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:46,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 13:28:46,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:46,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-12-14 13:28:46,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:46,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-12-14 13:28:46,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:46,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:46,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:46,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-14 13:28:46,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:28:46,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-12-14 13:28:46,541 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:28:46,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-12-14 13:28:46,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:46,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:46,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:46,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:46,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:46,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:46,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:46,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:46,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:46,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2022-12-14 13:28:46,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:46,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:46,692 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 13:28:46,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 345 treesize of output 327 [2022-12-14 13:28:46,734 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 13:28:46,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 339 treesize of output 346 [2022-12-14 13:28:46,774 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 13:28:46,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 333 treesize of output 340 [2022-12-14 13:28:47,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:47,092 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 13:28:47,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 672 treesize of output 673 [2022-12-14 13:28:47,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:47,150 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 13:28:47,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 666 treesize of output 667 [2022-12-14 13:28:47,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:28:47,200 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:28:47,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 647 treesize of output 628 [2022-12-14 13:28:47,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:47,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:47,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:47,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:28:47,601 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-12-14 13:28:47,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 356 treesize of output 341 [2022-12-14 13:28:47,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:28:47,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:28:47,635 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:28:47,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 352 treesize of output 345 [2022-12-14 13:28:47,651 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:28:47,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:28:47,665 INFO L321 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2022-12-14 13:28:47,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 424 treesize of output 417 [2022-12-14 13:28:47,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:47,807 INFO L321 Elim1Store]: treesize reduction 170, result has 13.7 percent of original size [2022-12-14 13:28:47,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 425 treesize of output 429 [2022-12-14 13:28:47,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:47,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:47,965 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 13:28:47,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 345 treesize of output 327 [2022-12-14 13:28:47,999 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 13:28:48,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 339 treesize of output 346 [2022-12-14 13:28:48,027 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 13:28:48,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 333 treesize of output 340 [2022-12-14 13:28:48,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:28:48,405 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:28:48,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 1155 treesize of output 1104 [2022-12-14 13:28:48,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:48,467 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 13:28:48,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 1152 treesize of output 1147 [2022-12-14 13:28:48,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:48,515 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 13:28:48,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 1140 treesize of output 1135 [2022-12-14 13:28:48,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:28:48,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:28:48,938 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:28:48,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 348 treesize of output 341 [2022-12-14 13:28:48,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:28:48,957 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:28:48,969 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:28:48,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 360 treesize of output 353 [2022-12-14 13:28:48,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:48,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:48,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:48,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:28:48,992 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-12-14 13:28:48,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 430 treesize of output 415 [2022-12-14 13:28:49,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 13:28:49,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 13:28:49,107 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:28:51,246 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '642#(and (= |ULTIMATE.start_sll_create_~head~0#1.base| |ULTIMATE.start_sll_create_#res#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_sll_create_#res#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (= |ULTIMATE.start_sll_remove_first_#in~head#1.base| |ULTIMATE.start_sll_remove_first_~head#1.base|) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |#NULL.offset| 0) (= |ULTIMATE.start_sll_remove_first_#in~head#1.base| |ULTIMATE.start_main_~#s~0#1.base|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (= |ULTIMATE.start_sll_remove_first_#in~head#1.offset| |ULTIMATE.start_main_~#s~0#1.offset|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_sll_remove_first_~head#1.offset| |ULTIMATE.start_sll_remove_first_#in~head#1.offset|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_sll_create_#res#1.offset| |ULTIMATE.start_sll_create_~head~0#1.offset|) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |#NULL.offset|) (not (= (select |#valid| |ULTIMATE.start_sll_remove_first_~head#1.base|) 1)) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_sll_create_#res#1.base|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (= |ULTIMATE.start_main_~len~0#1| (+ |ULTIMATE.start_main_~i~0#1| 1)) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-12-14 13:28:51,246 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:28:51,246 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:28:51,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2022-12-14 13:28:51,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797501729] [2022-12-14 13:28:51,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:28:51,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 13:28:51,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:28:51,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 13:28:51,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-12-14 13:28:51,247 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:28:51,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:28:51,268 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2022-12-14 13:28:51,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:28:51,268 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 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 9 [2022-12-14 13:28:51,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:28:51,268 INFO L225 Difference]: With dead ends: 40 [2022-12-14 13:28:51,268 INFO L226 Difference]: Without dead ends: 40 [2022-12-14 13:28:51,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-12-14 13:28:51,269 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 4 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:28:51,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 54 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:28:51,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-12-14 13:28:51,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-12-14 13:28:51,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 25 states have (on average 1.64) internal successors, (41), 39 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:28:51,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2022-12-14 13:28:51,271 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 9 [2022-12-14 13:28:51,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:28:51,271 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2022-12-14 13:28:51,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:28:51,271 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2022-12-14 13:28:51,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 13:28:51,272 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:28:51,272 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1] [2022-12-14 13:28:51,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 13:28:51,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 13:28:51,474 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 13:28:51,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:28:51,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1339147114, now seen corresponding path program 2 times [2022-12-14 13:28:51,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:28:51,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786200266] [2022-12-14 13:28:51,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:28:51,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:28:51,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:28:51,658 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 13:28:51,658 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:28:51,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786200266] [2022-12-14 13:28:51,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786200266] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:28:51,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137428695] [2022-12-14 13:28:51,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:28:51,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:28:51,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:28:51,660 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:28:51,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 13:28:51,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 13:28:51,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:28:51,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 13:28:51,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:28:51,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 13:28:51,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:51,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 13:28:51,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:51,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 13:28:51,793 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:28:51,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:28:51,877 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:28:51,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137428695] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:28:51,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [249246614] [2022-12-14 13:28:51,879 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:28:51,879 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:28:51,879 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:28:51,880 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:28:51,880 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:28:51,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:51,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:51,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 13:28:51,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:51,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:51,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:51,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:51,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:51,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-12-14 13:28:51,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 13:28:51,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:51,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-12-14 13:28:51,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 13:28:51,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:51,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-12-14 13:28:52,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:52,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-12-14 13:28:52,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:52,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:52,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 13:28:52,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:28:52,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-12-14 13:28:52,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:52,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:52,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:52,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-14 13:28:52,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:28:52,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-12-14 13:28:52,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:52,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:52,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:52,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:52,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:52,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:52,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:52,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:52,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:52,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2022-12-14 13:28:52,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:52,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:52,174 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 13:28:52,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 352 treesize of output 334 [2022-12-14 13:28:52,207 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 13:28:52,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 346 treesize of output 353 [2022-12-14 13:28:52,245 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 13:28:52,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 340 treesize of output 347 [2022-12-14 13:28:52,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:52,512 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 13:28:52,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 686 treesize of output 687 [2022-12-14 13:28:52,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:52,553 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 13:28:52,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 680 treesize of output 681 [2022-12-14 13:28:52,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:28:52,599 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:28:52,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 661 treesize of output 642 [2022-12-14 13:28:52,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:52,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:52,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:52,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:28:52,922 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-12-14 13:28:52,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 356 treesize of output 341 [2022-12-14 13:28:52,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:28:52,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:28:52,949 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:28:52,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 352 treesize of output 345 [2022-12-14 13:28:52,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:28:52,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:28:52,973 INFO L321 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2022-12-14 13:28:52,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 424 treesize of output 417 [2022-12-14 13:28:53,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:53,108 INFO L321 Elim1Store]: treesize reduction 170, result has 13.7 percent of original size [2022-12-14 13:28:53,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 425 treesize of output 429 [2022-12-14 13:28:53,280 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 13:28:53,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 346 treesize of output 353 [2022-12-14 13:28:53,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:53,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:53,297 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 13:28:53,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 346 treesize of output 328 [2022-12-14 13:28:53,327 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 13:28:53,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 340 treesize of output 347 [2022-12-14 13:28:53,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:53,546 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 13:28:53,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 686 treesize of output 687 [2022-12-14 13:28:53,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:53,585 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 13:28:53,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 680 treesize of output 681 [2022-12-14 13:28:53,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:28:53,622 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:28:53,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 661 treesize of output 642 [2022-12-14 13:28:53,957 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:28:53,957 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:28:53,974 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:28:53,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 352 treesize of output 345 [2022-12-14 13:28:53,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:53,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:53,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:53,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:28:54,000 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-12-14 13:28:54,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 368 treesize of output 353 [2022-12-14 13:28:54,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:28:54,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:28:54,027 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:28:54,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 364 treesize of output 357 [2022-12-14 13:28:54,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 13:28:54,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 13:28:54,127 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:28:56,226 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '816#(and (= |ULTIMATE.start_sll_create_~head~0#1.base| |ULTIMATE.start_sll_create_#res#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_sll_create_#res#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (= |ULTIMATE.start_sll_remove_first_#in~head#1.base| |ULTIMATE.start_sll_remove_first_~head#1.base|) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |#NULL.offset| 0) (= |ULTIMATE.start_sll_remove_first_#in~head#1.base| |ULTIMATE.start_main_~#s~0#1.base|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (= |ULTIMATE.start_sll_remove_first_#in~head#1.offset| |ULTIMATE.start_main_~#s~0#1.offset|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_sll_remove_first_~head#1.offset| |ULTIMATE.start_sll_remove_first_#in~head#1.offset|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_sll_create_#res#1.offset| |ULTIMATE.start_sll_create_~head~0#1.offset|) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |#NULL.offset|) (not (= (select |#valid| |ULTIMATE.start_sll_remove_first_~head#1.base|) 1)) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_sll_create_#res#1.base|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (= |ULTIMATE.start_main_~len~0#1| (+ |ULTIMATE.start_main_~i~0#1| 1)) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-12-14 13:28:56,226 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:28:56,226 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:28:56,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 6 [2022-12-14 13:28:56,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003521449] [2022-12-14 13:28:56,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:28:56,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 13:28:56,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:28:56,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 13:28:56,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-12-14 13:28:56,228 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:28:56,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:28:56,297 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2022-12-14 13:28:56,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 13:28:56,297 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 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 14 [2022-12-14 13:28:56,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:28:56,298 INFO L225 Difference]: With dead ends: 52 [2022-12-14 13:28:56,298 INFO L226 Difference]: Without dead ends: 52 [2022-12-14 13:28:56,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2022-12-14 13:28:56,299 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 62 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:28:56,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 29 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:28:56,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-12-14 13:28:56,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2022-12-14 13:28:56,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 39 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:28:56,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2022-12-14 13:28:56,301 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 14 [2022-12-14 13:28:56,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:28:56,301 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2022-12-14 13:28:56,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:28:56,301 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2022-12-14 13:28:56,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 13:28:56,301 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:28:56,302 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1] [2022-12-14 13:28:56,305 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 13:28:56,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:28:56,504 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 13:28:56,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:28:56,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1339147115, now seen corresponding path program 1 times [2022-12-14 13:28:56,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:28:56,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451568691] [2022-12-14 13:28:56,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:28:56,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:28:56,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:28:56,736 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:28:56,736 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:28:56,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451568691] [2022-12-14 13:28:56,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451568691] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:28:56,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440891458] [2022-12-14 13:28:56,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:28:56,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:28:56,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:28:56,737 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:28:56,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 13:28:56,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:28:56,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 13:28:56,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:28:56,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 13:28:56,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:56,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 13:28:56,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:56,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 13:28:56,878 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:28:56,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:28:59,039 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_node_create_~temp~0#1.base_24| Int)) (or (forall ((|v_ULTIMATE.start_node_create_~temp~0#1.base_23| Int) (v_ArrVal_281 Int)) (or (not (< |v_ULTIMATE.start_node_create_~temp~0#1.base_23| |c_#StackHeapBarrier|)) (forall ((v_ArrVal_282 Int)) (<= (+ |c_ULTIMATE.start_main_~#s~0#1.offset| 4) (select (store (store |c_#length| |v_ULTIMATE.start_node_create_~temp~0#1.base_24| v_ArrVal_281) |v_ULTIMATE.start_node_create_~temp~0#1.base_23| v_ArrVal_282) |c_ULTIMATE.start_main_~#s~0#1.base|))))) (not (< |v_ULTIMATE.start_node_create_~temp~0#1.base_24| |c_#StackHeapBarrier|)))) (<= 0 |c_ULTIMATE.start_main_~#s~0#1.offset|)) is different from false [2022-12-14 13:28:59,041 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-12-14 13:28:59,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440891458] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:28:59,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1636014597] [2022-12-14 13:28:59,043 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:28:59,043 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:28:59,043 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:28:59,043 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:28:59,043 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:28:59,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:59,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:59,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 13:28:59,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:59,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:59,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:59,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:59,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:59,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-12-14 13:28:59,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 13:28:59,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 13:28:59,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:59,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-12-14 13:28:59,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:59,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-12-14 13:28:59,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:59,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-12-14 13:28:59,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:59,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:59,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 13:28:59,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:28:59,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-12-14 13:28:59,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:59,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:59,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:59,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-14 13:28:59,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:28:59,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-12-14 13:28:59,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:59,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:59,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:59,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:59,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:59,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:59,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:59,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:59,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:59,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2022-12-14 13:28:59,333 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 13:28:59,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 339 treesize of output 346 [2022-12-14 13:28:59,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:59,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:59,355 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 13:28:59,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 339 treesize of output 321 [2022-12-14 13:28:59,388 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 13:28:59,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 333 treesize of output 340 [2022-12-14 13:28:59,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:28:59,513 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:28:59,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 353 treesize of output 354 [2022-12-14 13:28:59,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:59,552 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 13:28:59,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 362 treesize of output 363 [2022-12-14 13:28:59,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:59,583 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 13:28:59,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 356 treesize of output 357 [2022-12-14 13:28:59,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:59,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:59,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:59,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:28:59,770 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-12-14 13:28:59,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 381 treesize of output 366 [2022-12-14 13:28:59,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:28:59,786 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:28:59,796 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-12-14 13:28:59,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 377 treesize of output 370 [2022-12-14 13:28:59,809 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:28:59,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:28:59,820 INFO L321 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2022-12-14 13:28:59,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 461 treesize of output 454 [2022-12-14 13:28:59,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:59,953 INFO L321 Elim1Store]: treesize reduction 170, result has 13.7 percent of original size [2022-12-14 13:28:59,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 492 treesize of output 496 [2022-12-14 13:29:00,146 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 13:29:00,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 339 treesize of output 346 [2022-12-14 13:29:00,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:00,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:00,170 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 13:29:00,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 339 treesize of output 321 [2022-12-14 13:29:00,207 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 13:29:00,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 333 treesize of output 340 [2022-12-14 13:29:00,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:00,478 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:29:00,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 840 treesize of output 809 [2022-12-14 13:29:00,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:00,531 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 13:29:00,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 841 treesize of output 836 [2022-12-14 13:29:00,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:00,576 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 13:29:00,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 829 treesize of output 830 [2022-12-14 13:29:00,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:00,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:00,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:00,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:00,911 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-12-14 13:29:00,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 356 treesize of output 341 [2022-12-14 13:29:00,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:00,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:00,936 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:29:00,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 352 treesize of output 345 [2022-12-14 13:29:00,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:00,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:00,961 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:29:00,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 364 treesize of output 357 [2022-12-14 13:29:01,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 13:29:01,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 13:29:01,074 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:29:03,360 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1015#(and (not (<= (+ |ULTIMATE.start_sll_remove_first_~head#1.offset| 4) (select |#length| |ULTIMATE.start_sll_remove_first_~head#1.base|))) (= |ULTIMATE.start_sll_create_~head~0#1.base| |ULTIMATE.start_sll_create_#res#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_sll_create_#res#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (= |ULTIMATE.start_sll_remove_first_#in~head#1.base| |ULTIMATE.start_sll_remove_first_~head#1.base|) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |#NULL.offset| 0) (= |ULTIMATE.start_sll_remove_first_#in~head#1.base| |ULTIMATE.start_main_~#s~0#1.base|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (= |ULTIMATE.start_sll_remove_first_#in~head#1.offset| |ULTIMATE.start_main_~#s~0#1.offset|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_sll_remove_first_~head#1.offset| |ULTIMATE.start_sll_remove_first_#in~head#1.offset|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_sll_create_#res#1.offset| |ULTIMATE.start_sll_create_~head~0#1.offset|) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |#NULL.offset|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_sll_create_#res#1.base|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (= |ULTIMATE.start_main_~len~0#1| (+ |ULTIMATE.start_main_~i~0#1| 1)) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-12-14 13:29:03,360 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:29:03,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:29:03,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 4] total 13 [2022-12-14 13:29:03,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682113483] [2022-12-14 13:29:03,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:29:03,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 13:29:03,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:29:03,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 13:29:03,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=356, Unknown=1, NotChecked=40, Total=506 [2022-12-14 13:29:03,361 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 15 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:29:05,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:29:05,507 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2022-12-14 13:29:05,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 13:29:05,508 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-14 13:29:05,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:29:05,508 INFO L225 Difference]: With dead ends: 46 [2022-12-14 13:29:05,508 INFO L226 Difference]: Without dead ends: 46 [2022-12-14 13:29:05,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=166, Invalid=487, Unknown=1, NotChecked=48, Total=702 [2022-12-14 13:29:05,509 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 248 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:29:05,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 8 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 60 Invalid, 0 Unknown, 40 Unchecked, 0.1s Time] [2022-12-14 13:29:05,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-12-14 13:29:05,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 36. [2022-12-14 13:29:05,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 35 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:29:05,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2022-12-14 13:29:05,511 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 14 [2022-12-14 13:29:05,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:29:05,511 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2022-12-14 13:29:05,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:29:05,511 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2022-12-14 13:29:05,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 13:29:05,511 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:29:05,511 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-12-14 13:29:05,516 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 13:29:05,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:29:05,713 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 13:29:05,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:29:05,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1436112406, now seen corresponding path program 1 times [2022-12-14 13:29:05,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:29:05,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39178265] [2022-12-14 13:29:05,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:05,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:29:05,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:05,847 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 13:29:05,847 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:29:05,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39178265] [2022-12-14 13:29:05,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39178265] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:29:05,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:29:05,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 13:29:05,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184796689] [2022-12-14 13:29:05,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:29:05,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 13:29:05,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:29:05,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 13:29:05,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 13:29:05,849 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 8 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) [2022-12-14 13:29:05,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:29:05,963 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2022-12-14 13:29:05,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 13:29:05,965 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 8 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 15 [2022-12-14 13:29:05,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:29:05,965 INFO L225 Difference]: With dead ends: 45 [2022-12-14 13:29:05,966 INFO L226 Difference]: Without dead ends: 45 [2022-12-14 13:29:05,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-12-14 13:29:05,966 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 62 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:29:05,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 58 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:29:05,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-12-14 13:29:05,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2022-12-14 13:29:05,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 36 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:29:05,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2022-12-14 13:29:05,969 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 15 [2022-12-14 13:29:05,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:29:05,970 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2022-12-14 13:29:05,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 8 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) [2022-12-14 13:29:05,970 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2022-12-14 13:29:05,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 13:29:05,970 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:29:05,970 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-12-14 13:29:05,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 13:29:05,971 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 13:29:05,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:29:05,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1436112405, now seen corresponding path program 1 times [2022-12-14 13:29:05,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:29:05,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687027170] [2022-12-14 13:29:05,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:05,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:29:05,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:06,173 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:29:06,173 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:29:06,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687027170] [2022-12-14 13:29:06,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687027170] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:29:06,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:29:06,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 13:29:06,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152173103] [2022-12-14 13:29:06,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:29:06,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 13:29:06,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:29:06,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 13:29:06,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 13:29:06,175 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) 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) [2022-12-14 13:29:06,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:29:06,303 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2022-12-14 13:29:06,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 13:29:06,304 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) 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 [2022-12-14 13:29:06,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:29:06,304 INFO L225 Difference]: With dead ends: 46 [2022-12-14 13:29:06,304 INFO L226 Difference]: Without dead ends: 46 [2022-12-14 13:29:06,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-12-14 13:29:06,305 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 134 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:29:06,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 50 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:29:06,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-12-14 13:29:06,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 37. [2022-12-14 13:29:06,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 36 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:29:06,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2022-12-14 13:29:06,307 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 15 [2022-12-14 13:29:06,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:29:06,307 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2022-12-14 13:29:06,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) 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) [2022-12-14 13:29:06,307 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2022-12-14 13:29:06,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 13:29:06,307 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:29:06,307 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:29:06,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 13:29:06,307 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 13:29:06,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:29:06,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1419481901, now seen corresponding path program 1 times [2022-12-14 13:29:06,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:29:06,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384188315] [2022-12-14 13:29:06,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:06,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:29:06,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:06,394 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:29:06,394 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:29:06,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384188315] [2022-12-14 13:29:06,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384188315] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:29:06,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:29:06,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 13:29:06,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50344094] [2022-12-14 13:29:06,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:29:06,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 13:29:06,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:29:06,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 13:29:06,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 13:29:06,396 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:29:06,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:29:06,497 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2022-12-14 13:29:06,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 13:29:06,497 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 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 17 [2022-12-14 13:29:06,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:29:06,498 INFO L225 Difference]: With dead ends: 45 [2022-12-14 13:29:06,498 INFO L226 Difference]: Without dead ends: 45 [2022-12-14 13:29:06,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2022-12-14 13:29:06,499 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 136 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:29:06,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 58 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:29:06,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-12-14 13:29:06,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2022-12-14 13:29:06,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 38 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:29:06,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2022-12-14 13:29:06,502 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 17 [2022-12-14 13:29:06,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:29:06,506 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2022-12-14 13:29:06,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:29:06,507 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2022-12-14 13:29:06,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 13:29:06,507 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:29:06,507 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:29:06,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 13:29:06,507 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 13:29:06,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:29:06,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1054265881, now seen corresponding path program 1 times [2022-12-14 13:29:06,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:29:06,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496955569] [2022-12-14 13:29:06,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:06,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:29:06,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:06,608 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:29:06,608 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:29:06,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496955569] [2022-12-14 13:29:06,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496955569] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:29:06,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:29:06,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 13:29:06,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850277280] [2022-12-14 13:29:06,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:29:06,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 13:29:06,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:29:06,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 13:29:06,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 13:29:06,610 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:29:06,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:29:06,729 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2022-12-14 13:29:06,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 13:29:06,730 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-12-14 13:29:06,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:29:06,730 INFO L225 Difference]: With dead ends: 44 [2022-12-14 13:29:06,730 INFO L226 Difference]: Without dead ends: 44 [2022-12-14 13:29:06,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2022-12-14 13:29:06,731 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 127 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:29:06,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 40 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:29:06,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-12-14 13:29:06,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2022-12-14 13:29:06,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 39 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:29:06,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2022-12-14 13:29:06,733 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 18 [2022-12-14 13:29:06,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:29:06,733 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2022-12-14 13:29:06,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:29:06,734 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2022-12-14 13:29:06,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 13:29:06,734 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:29:06,734 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:29:06,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 13:29:06,734 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 13:29:06,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:29:06,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1677496149, now seen corresponding path program 1 times [2022-12-14 13:29:06,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:29:06,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687058904] [2022-12-14 13:29:06,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:06,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:29:06,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:06,779 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 13:29:06,780 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:29:06,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687058904] [2022-12-14 13:29:06,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687058904] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:29:06,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:29:06,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 13:29:06,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358792108] [2022-12-14 13:29:06,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:29:06,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 13:29:06,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:29:06,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 13:29:06,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:29:06,781 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:29:06,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:29:06,825 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2022-12-14 13:29:06,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:29:06,825 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-12-14 13:29:06,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:29:06,826 INFO L225 Difference]: With dead ends: 39 [2022-12-14 13:29:06,826 INFO L226 Difference]: Without dead ends: 39 [2022-12-14 13:29:06,826 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 [2022-12-14 13:29:06,827 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 9 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:29:06,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 30 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:29:06,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-12-14 13:29:06,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-12-14 13:29:06,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 38 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:29:06,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2022-12-14 13:29:06,829 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 19 [2022-12-14 13:29:06,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:29:06,829 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2022-12-14 13:29:06,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:29:06,829 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2022-12-14 13:29:06,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 13:29:06,829 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:29:06,829 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:29:06,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 13:29:06,829 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 13:29:06,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:29:06,830 INFO L85 PathProgramCache]: Analyzing trace with hash 462773162, now seen corresponding path program 1 times [2022-12-14 13:29:06,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:29:06,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973108643] [2022-12-14 13:29:06,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:06,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:29:06,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:06,960 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:29:06,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:29:06,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973108643] [2022-12-14 13:29:06,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973108643] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:29:06,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095612461] [2022-12-14 13:29:06,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:06,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:29:06,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:29:06,962 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:29:06,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 13:29:07,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:07,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 13:29:07,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:29:07,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:07,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 13:29:07,112 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 13:29:07,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:29:07,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095612461] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:29:07,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:29:07,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2022-12-14 13:29:07,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516692801] [2022-12-14 13:29:07,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:29:07,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 13:29:07,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:29:07,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 13:29:07,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-12-14 13:29:07,113 INFO L87 Difference]: Start difference. First operand 39 states and 40 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) [2022-12-14 13:29:07,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:29:07,172 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2022-12-14 13:29:07,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 13:29:07,172 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 20 [2022-12-14 13:29:07,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:29:07,173 INFO L225 Difference]: With dead ends: 38 [2022-12-14 13:29:07,173 INFO L226 Difference]: Without dead ends: 38 [2022-12-14 13:29:07,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-12-14 13:29:07,174 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 54 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:29:07,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 18 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:29:07,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-12-14 13:29:07,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-12-14 13:29:07,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 30 states have (on average 1.3) internal successors, (39), 37 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:29:07,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2022-12-14 13:29:07,176 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 20 [2022-12-14 13:29:07,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:29:07,176 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2022-12-14 13:29:07,176 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) [2022-12-14 13:29:07,176 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2022-12-14 13:29:07,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 13:29:07,176 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:29:07,176 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:29:07,181 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 13:29:07,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 13:29:07,378 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 13:29:07,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:29:07,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1951559090, now seen corresponding path program 1 times [2022-12-14 13:29:07,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:29:07,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12332859] [2022-12-14 13:29:07,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:07,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:29:07,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:07,525 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 13:29:07,525 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:29:07,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12332859] [2022-12-14 13:29:07,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12332859] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:29:07,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:29:07,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:29:07,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465832149] [2022-12-14 13:29:07,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:29:07,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:29:07,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:29:07,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:29:07,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:29:07,527 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:29:07,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:29:07,558 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2022-12-14 13:29:07,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:29:07,559 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 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 22 [2022-12-14 13:29:07,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:29:07,559 INFO L225 Difference]: With dead ends: 36 [2022-12-14 13:29:07,559 INFO L226 Difference]: Without dead ends: 36 [2022-12-14 13:29:07,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:29:07,560 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 27 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:29:07,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 11 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:29:07,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-12-14 13:29:07,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-12-14 13:29:07,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 35 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:29:07,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2022-12-14 13:29:07,562 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 22 [2022-12-14 13:29:07,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:29:07,562 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2022-12-14 13:29:07,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:29:07,562 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2022-12-14 13:29:07,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 13:29:07,563 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:29:07,563 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:29:07,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 13:29:07,563 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 13:29:07,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:29:07,564 INFO L85 PathProgramCache]: Analyzing trace with hash -368841365, now seen corresponding path program 1 times [2022-12-14 13:29:07,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:29:07,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427748704] [2022-12-14 13:29:07,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:07,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:29:07,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:08,074 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:29:08,075 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:29:08,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427748704] [2022-12-14 13:29:08,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427748704] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:29:08,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773722265] [2022-12-14 13:29:08,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:08,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:29:08,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:29:08,076 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:29:08,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 13:29:08,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:08,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 67 conjunts are in the unsatisfiable core [2022-12-14 13:29:08,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:29:08,202 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 13:29:08,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-14 13:29:08,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:29:08,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-12-14 13:29:08,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:08,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2022-12-14 13:29:08,562 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:29:08,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 27 [2022-12-14 13:29:08,648 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:29:08,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2022-12-14 13:29:08,651 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:29:08,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:29:08,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-12-14 13:29:08,994 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:29:08,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 147 treesize of output 149 [2022-12-14 13:29:10,139 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:29:10,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773722265] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:29:10,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1082900293] [2022-12-14 13:29:10,141 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 13:29:10,141 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:29:10,141 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:29:10,142 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:29:10,142 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:29:10,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:10,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:10,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 13:29:10,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:10,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:10,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:10,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:10,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:10,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-12-14 13:29:10,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:10,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-12-14 13:29:10,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 13:29:10,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 13:29:10,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:10,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-12-14 13:29:10,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:10,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:10,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 13:29:10,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:10,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-12-14 13:29:10,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:10,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:10,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:10,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-14 13:29:10,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:10,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-12-14 13:29:10,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:10,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-12-14 13:29:10,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:10,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:10,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:10,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:10,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:10,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:10,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:10,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:10,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:10,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2022-12-14 13:29:10,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:10,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:10,406 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 13:29:10,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 345 treesize of output 327 [2022-12-14 13:29:10,435 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 13:29:10,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 339 treesize of output 346 [2022-12-14 13:29:10,463 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 13:29:10,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 333 treesize of output 340 [2022-12-14 13:29:10,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:10,684 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:29:10,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 659 treesize of output 640 [2022-12-14 13:29:10,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:10,727 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 13:29:10,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 664 treesize of output 665 [2022-12-14 13:29:10,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:10,766 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 13:29:10,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 658 treesize of output 659 [2022-12-14 13:29:11,001 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:11,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:11,014 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:29:11,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 352 treesize of output 345 [2022-12-14 13:29:11,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:11,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:11,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:11,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:11,040 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-12-14 13:29:11,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 428 treesize of output 413 [2022-12-14 13:29:11,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:11,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:11,069 INFO L321 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2022-12-14 13:29:11,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 424 treesize of output 417 [2022-12-14 13:29:11,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:11,216 INFO L321 Elim1Store]: treesize reduction 170, result has 13.7 percent of original size [2022-12-14 13:29:11,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 425 treesize of output 429 [2022-12-14 13:29:11,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:11,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:11,356 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 13:29:11,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 345 treesize of output 327 [2022-12-14 13:29:11,386 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 13:29:11,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 339 treesize of output 346 [2022-12-14 13:29:11,421 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 13:29:11,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 333 treesize of output 340 [2022-12-14 13:29:11,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:11,649 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 13:29:11,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 672 treesize of output 673 [2022-12-14 13:29:11,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:11,689 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:29:11,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 653 treesize of output 634 [2022-12-14 13:29:11,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:11,730 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 13:29:11,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 658 treesize of output 659 [2022-12-14 13:29:12,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:12,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:12,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:12,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:12,013 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-12-14 13:29:12,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 383 treesize of output 368 [2022-12-14 13:29:12,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:12,030 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:12,041 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-12-14 13:29:12,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 379 treesize of output 372 [2022-12-14 13:29:12,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:12,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:12,069 INFO L321 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2022-12-14 13:29:12,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 463 treesize of output 456 [2022-12-14 13:29:12,225 INFO L321 Elim1Store]: treesize reduction 27, result has 32.5 percent of original size [2022-12-14 13:29:12,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 29 [2022-12-14 13:29:12,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:12,259 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:29:12,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 84 treesize of output 62 [2022-12-14 13:29:12,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:12,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 45 [2022-12-14 13:29:12,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:29:12,392 INFO L321 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2022-12-14 13:29:12,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 45 [2022-12-14 13:29:12,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:29:12,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:29:12,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:29:12,589 INFO L321 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2022-12-14 13:29:12,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 45 [2022-12-14 13:29:12,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:29:12,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:29:12,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:29:12,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 13:29:12,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 13:29:12,734 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:29:16,293 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2013#(and (<= 0 |ULTIMATE.start_sll_remove_first_#in~head#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_sll_remove_first_~head#1.base|) 1) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_remove_first_#in~head#1.base|) (= |ULTIMATE.start_sll_remove_first_#t~mem6#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_remove_first_~head#1.base|) |ULTIMATE.start_sll_remove_first_~head#1.offset|)) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 0 |ULTIMATE.start_sll_remove_first_~head#1.offset|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (not (= (select |#valid| |ULTIMATE.start_sll_remove_first_#t~mem6#1.base|) 1)) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_remove_first_~head#1.base|) |ULTIMATE.start_sll_remove_first_~head#1.offset|) |ULTIMATE.start_sll_remove_first_#t~mem6#1.offset|) (<= |ULTIMATE.start_sll_remove_first_~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_remove_first_~head#1.base|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~i~0#1| 1) (<= (+ |ULTIMATE.start_sll_remove_first_~head#1.offset| 4) (select |#length| |ULTIMATE.start_sll_remove_first_~head#1.base|)) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (<= |ULTIMATE.start_sll_remove_first_#in~head#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 13:29:16,293 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:29:16,293 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:29:16,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 39 [2022-12-14 13:29:16,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262287234] [2022-12-14 13:29:16,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:29:16,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-14 13:29:16,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:29:16,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-14 13:29:16,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2512, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 13:29:16,297 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 40 states, 39 states have (on average 1.5128205128205128) internal successors, (59), 40 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:29:17,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:29:17,464 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2022-12-14 13:29:17,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 13:29:17,464 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.5128205128205128) internal successors, (59), 40 states have internal predecessors, (59), 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 23 [2022-12-14 13:29:17,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:29:17,465 INFO L225 Difference]: With dead ends: 56 [2022-12-14 13:29:17,465 INFO L226 Difference]: Without dead ends: 56 [2022-12-14 13:29:17,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1298 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=552, Invalid=4560, Unknown=0, NotChecked=0, Total=5112 [2022-12-14 13:29:17,468 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 166 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 13:29:17,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 128 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 13:29:17,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-12-14 13:29:17,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 41. [2022-12-14 13:29:17,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 40 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) [2022-12-14 13:29:17,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2022-12-14 13:29:17,470 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 23 [2022-12-14 13:29:17,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:29:17,471 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2022-12-14 13:29:17,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.5128205128205128) internal successors, (59), 40 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:29:17,471 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2022-12-14 13:29:17,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 13:29:17,471 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:29:17,471 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:29:17,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-14 13:29:17,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 13:29:17,672 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 13:29:17,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:29:17,673 INFO L85 PathProgramCache]: Analyzing trace with hash -368841364, now seen corresponding path program 1 times [2022-12-14 13:29:17,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:29:17,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107534061] [2022-12-14 13:29:17,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:17,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:29:17,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:18,340 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:29:18,340 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:29:18,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107534061] [2022-12-14 13:29:18,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107534061] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:29:18,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101159531] [2022-12-14 13:29:18,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:18,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:29:18,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:29:18,341 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:29:18,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 13:29:18,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:18,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 82 conjunts are in the unsatisfiable core [2022-12-14 13:29:18,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:29:18,502 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 13:29:18,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-14 13:29:18,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 13:29:18,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:29:18,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:29:18,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:18,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:18,937 INFO L321 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2022-12-14 13:29:18,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 76 [2022-12-14 13:29:18,945 INFO L321 Elim1Store]: treesize reduction 49, result has 5.8 percent of original size [2022-12-14 13:29:18,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 70 treesize of output 55 [2022-12-14 13:29:19,044 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:29:19,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 22 [2022-12-14 13:29:19,049 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:29:19,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 19 [2022-12-14 13:29:19,073 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:29:19,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:29:19,448 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:29:19,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 356 treesize of output 358 [2022-12-14 13:29:19,561 INFO L321 Elim1Store]: treesize reduction 26, result has 76.6 percent of original size [2022-12-14 13:29:19,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 738 treesize of output 704 [2022-12-14 13:29:21,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 122 [2022-12-14 13:29:21,625 INFO L321 Elim1Store]: treesize reduction 57, result has 48.6 percent of original size [2022-12-14 13:29:21,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 288 treesize of output 295 [2022-12-14 13:29:27,922 WARN L233 SmtUtils]: Spent 6.07s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:29:27,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:27,930 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:29:27,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101159531] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:29:27,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [564864037] [2022-12-14 13:29:27,932 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 13:29:27,932 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:29:27,932 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:29:27,932 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:29:27,932 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:29:27,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:27,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:27,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 13:29:27,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:27,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:27,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:27,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:27,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:27,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-12-14 13:29:27,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 13:29:28,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 13:29:28,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:28,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-12-14 13:29:28,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:28,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-12-14 13:29:28,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:28,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:28,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 13:29:28,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:28,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-12-14 13:29:28,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:28,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-12-14 13:29:28,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:28,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:28,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:28,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-14 13:29:28,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:28,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-12-14 13:29:28,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:28,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:28,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:28,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:28,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:28,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:28,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:28,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:28,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:28,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2022-12-14 13:29:28,201 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 13:29:28,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 339 treesize of output 346 [2022-12-14 13:29:28,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:28,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:28,238 INFO L321 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2022-12-14 13:29:28,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 339 treesize of output 331 [2022-12-14 13:29:28,270 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 13:29:28,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 329 treesize of output 336 [2022-12-14 13:29:28,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:28,595 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 13:29:28,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 693 treesize of output 688 [2022-12-14 13:29:28,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:28,652 INFO L321 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2022-12-14 13:29:28,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 668 treesize of output 657 [2022-12-14 13:29:28,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:28,700 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 13:29:28,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 677 treesize of output 672 [2022-12-14 13:29:28,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:28,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:28,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:28,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:28,985 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-12-14 13:29:28,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 360 treesize of output 345 [2022-12-14 13:29:28,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:29,000 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:29,010 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:29:29,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 356 treesize of output 349 [2022-12-14 13:29:29,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:29,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:29,036 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:29:29,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 368 treesize of output 361 [2022-12-14 13:29:29,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:29,186 INFO L321 Elim1Store]: treesize reduction 170, result has 13.7 percent of original size [2022-12-14 13:29:29,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 435 treesize of output 439 [2022-12-14 13:29:29,350 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 13:29:29,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 339 treesize of output 346 [2022-12-14 13:29:29,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:29,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:29,395 INFO L321 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2022-12-14 13:29:29,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 339 treesize of output 331 [2022-12-14 13:29:29,434 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 13:29:29,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 329 treesize of output 336 [2022-12-14 13:29:29,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:29,701 INFO L321 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2022-12-14 13:29:29,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 680 treesize of output 669 [2022-12-14 13:29:29,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:29,744 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 13:29:29,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 689 treesize of output 684 [2022-12-14 13:29:29,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:29,783 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 13:29:29,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 677 treesize of output 672 [2022-12-14 13:29:30,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:30,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:30,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:30,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:30,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:30,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:30,071 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-12-14 13:29:30,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 385 treesize of output 370 [2022-12-14 13:29:30,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:30,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:30,102 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-12-14 13:29:30,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 381 treesize of output 374 [2022-12-14 13:29:30,117 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:30,118 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:30,131 INFO L321 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2022-12-14 13:29:30,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 465 treesize of output 458 [2022-12-14 13:29:30,299 INFO L321 Elim1Store]: treesize reduction 27, result has 32.5 percent of original size [2022-12-14 13:29:30,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 29 [2022-12-14 13:29:30,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:29:30,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:30,342 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:29:30,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 84 treesize of output 62 [2022-12-14 13:29:30,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:30,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 45 [2022-12-14 13:29:30,457 INFO L321 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2022-12-14 13:29:30,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 45 [2022-12-14 13:29:30,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:29:30,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:29:30,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:29:30,645 INFO L321 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2022-12-14 13:29:30,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 45 [2022-12-14 13:29:30,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:29:30,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:29:30,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:29:30,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 13:29:30,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 13:29:30,780 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:29:35,124 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2334#(and (<= 0 |ULTIMATE.start_sll_remove_first_#in~head#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 0 |ULTIMATE.start_sll_remove_first_#in~head#1.base|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 0 |ULTIMATE.start_sll_remove_first_~head#1.offset|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= |ULTIMATE.start_sll_remove_first_~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_remove_first_~head#1.base|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= |ULTIMATE.start_main_~i~0#1| 1) (or (not (<= (+ 8 |ULTIMATE.start_sll_remove_first_#t~mem6#1.offset|) (select |#length| |ULTIMATE.start_sll_remove_first_#t~mem6#1.base|))) (not (<= 0 (+ |ULTIMATE.start_sll_remove_first_#t~mem6#1.offset| 4)))) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (<= |ULTIMATE.start_sll_remove_first_#in~head#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 13:29:35,124 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:29:35,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:29:35,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2022-12-14 13:29:35,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051054224] [2022-12-14 13:29:35,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:29:35,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-14 13:29:35,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:29:35,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-14 13:29:35,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=2638, Unknown=0, NotChecked=0, Total=2862 [2022-12-14 13:29:35,127 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 41 states, 40 states have (on average 1.675) internal successors, (67), 41 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:29:37,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:29:37,310 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2022-12-14 13:29:37,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-14 13:29:37,310 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.675) internal successors, (67), 41 states have internal predecessors, (67), 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 23 [2022-12-14 13:29:37,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:29:37,310 INFO L225 Difference]: With dead ends: 76 [2022-12-14 13:29:37,310 INFO L226 Difference]: Without dead ends: 76 [2022-12-14 13:29:37,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1397 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=821, Invalid=5341, Unknown=0, NotChecked=0, Total=6162 [2022-12-14 13:29:37,312 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 627 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 13:29:37,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [627 Valid, 211 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 13:29:37,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-12-14 13:29:37,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 41. [2022-12-14 13:29:37,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 40 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:29:37,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2022-12-14 13:29:37,313 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 23 [2022-12-14 13:29:37,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:29:37,313 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2022-12-14 13:29:37,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 1.675) internal successors, (67), 41 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:29:37,313 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2022-12-14 13:29:37,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 13:29:37,314 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:29:37,314 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:29:37,318 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 13:29:37,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 13:29:37,516 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 13:29:37,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:29:37,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1452424466, now seen corresponding path program 1 times [2022-12-14 13:29:37,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:29:37,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83796489] [2022-12-14 13:29:37,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:37,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:29:37,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:37,573 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 13:29:37,573 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:29:37,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83796489] [2022-12-14 13:29:37,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83796489] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:29:37,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800606285] [2022-12-14 13:29:37,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:37,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:29:37,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:29:37,574 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:29:37,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 13:29:37,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:37,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 13:29:37,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:29:37,692 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 13:29:37,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:29:37,710 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 13:29:37,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800606285] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:29:37,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2077707772] [2022-12-14 13:29:37,712 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-12-14 13:29:37,712 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:29:37,712 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:29:37,712 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:29:37,712 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:29:37,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:37,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:37,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 13:29:37,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:37,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:37,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:37,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:37,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:37,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-12-14 13:29:37,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 13:29:37,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 13:29:37,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:37,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-12-14 13:29:37,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:37,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-12-14 13:29:37,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:37,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-12-14 13:29:37,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:37,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:37,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 13:29:37,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:37,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-12-14 13:29:37,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:37,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:37,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:37,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-14 13:29:37,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:37,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-12-14 13:29:37,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:37,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:37,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:37,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:37,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:37,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:37,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:37,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:37,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:37,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2022-12-14 13:29:37,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:37,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:37,950 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 13:29:37,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 352 treesize of output 334 [2022-12-14 13:29:37,981 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 13:29:37,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 346 treesize of output 353 [2022-12-14 13:29:38,018 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 13:29:38,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 340 treesize of output 347 [2022-12-14 13:29:38,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:38,232 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 13:29:38,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 686 treesize of output 687 [2022-12-14 13:29:38,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:38,278 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:29:38,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 667 treesize of output 648 [2022-12-14 13:29:38,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:38,329 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 13:29:38,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 672 treesize of output 673 [2022-12-14 13:29:38,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:38,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:38,675 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:29:38,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 352 treesize of output 345 [2022-12-14 13:29:38,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:38,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:38,706 INFO L321 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2022-12-14 13:29:38,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 424 treesize of output 417 [2022-12-14 13:29:38,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:38,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:38,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:38,725 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:38,730 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-12-14 13:29:38,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 440 treesize of output 425 [2022-12-14 13:29:38,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:38,857 INFO L321 Elim1Store]: treesize reduction 170, result has 13.7 percent of original size [2022-12-14 13:29:38,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 425 treesize of output 429 [2022-12-14 13:29:38,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:39,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:39,005 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 13:29:39,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 352 treesize of output 334 [2022-12-14 13:29:39,038 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 13:29:39,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 346 treesize of output 353 [2022-12-14 13:29:39,073 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 13:29:39,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 340 treesize of output 347 [2022-12-14 13:29:39,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:39,312 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 13:29:39,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 686 treesize of output 687 [2022-12-14 13:29:39,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:39,360 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:29:39,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 667 treesize of output 648 [2022-12-14 13:29:39,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:39,405 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 13:29:39,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 672 treesize of output 673 [2022-12-14 13:29:39,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:39,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:39,724 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:29:39,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 352 treesize of output 345 [2022-12-14 13:29:39,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:39,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:39,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:39,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:39,753 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-12-14 13:29:39,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 428 treesize of output 413 [2022-12-14 13:29:39,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:39,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:39,777 INFO L321 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2022-12-14 13:29:39,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 424 treesize of output 417 [2022-12-14 13:29:39,912 INFO L321 Elim1Store]: treesize reduction 27, result has 32.5 percent of original size [2022-12-14 13:29:39,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 29 [2022-12-14 13:29:39,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:39,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 57 [2022-12-14 13:29:39,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:39,955 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:29:39,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 44 [2022-12-14 13:29:39,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:29:40,069 INFO L321 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2022-12-14 13:29:40,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 45 [2022-12-14 13:29:40,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:29:40,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:29:40,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:29:40,222 INFO L321 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2022-12-14 13:29:40,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 45 [2022-12-14 13:29:40,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:29:40,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:29:40,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:29:40,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 13:29:40,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 13:29:40,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 13:29:40,369 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:29:43,145 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2657#(and (< |ULTIMATE.start_main_~i~0#1| 0) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (exists ((|v_ULTIMATE.start_main_~#s~0#1.base_18| Int)) (and (<= 0 |v_ULTIMATE.start_main_~#s~0#1.base_18|) (<= 4 (select |#length| |v_ULTIMATE.start_main_~#s~0#1.base_18|)) (= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~#s~0#1.base_18|) 0)) (= (select |#valid| |v_ULTIMATE.start_main_~#s~0#1.base_18|) 0) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_main_~#s~0#1.base_18|) 0) 0))) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |ULTIMATE.start_main_#res#1| 0) (= |#NULL.base| 0))' at error location [2022-12-14 13:29:43,145 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:29:43,145 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:29:43,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-12-14 13:29:43,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151527865] [2022-12-14 13:29:43,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:29:43,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 13:29:43,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:29:43,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 13:29:43,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2022-12-14 13:29:43,146 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:29:43,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:29:43,172 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2022-12-14 13:29:43,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:29:43,173 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-12-14 13:29:43,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:29:43,173 INFO L225 Difference]: With dead ends: 41 [2022-12-14 13:29:43,173 INFO L226 Difference]: Without dead ends: 41 [2022-12-14 13:29:43,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2022-12-14 13:29:43,173 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 39 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:29:43,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 42 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:29:43,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-12-14 13:29:43,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-12-14 13:29:43,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 35 states have (on average 1.2) internal successors, (42), 40 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:29:43,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2022-12-14 13:29:43,175 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 24 [2022-12-14 13:29:43,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:29:43,175 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2022-12-14 13:29:43,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:29:43,175 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2022-12-14 13:29:43,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 13:29:43,175 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:29:43,175 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:29:43,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-14 13:29:43,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:29:43,377 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 13:29:43,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:29:43,378 INFO L85 PathProgramCache]: Analyzing trace with hash 2025772052, now seen corresponding path program 1 times [2022-12-14 13:29:43,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:29:43,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655766482] [2022-12-14 13:29:43,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:43,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:29:43,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:43,787 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:29:43,787 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:29:43,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655766482] [2022-12-14 13:29:43,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655766482] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:29:43,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110817611] [2022-12-14 13:29:43,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:43,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:29:43,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:29:43,789 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:29:43,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 13:29:43,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:43,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 61 conjunts are in the unsatisfiable core [2022-12-14 13:29:43,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:29:43,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:29:44,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-12-14 13:29:44,229 INFO L321 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2022-12-14 13:29:44,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 33 [2022-12-14 13:29:44,313 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:29:44,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-12-14 13:29:44,315 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:29:44,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:29:44,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2022-12-14 13:29:44,514 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:29:44,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 88 [2022-12-14 13:29:44,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 55 [2022-12-14 13:29:44,566 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:29:44,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 114 treesize of output 154 [2022-12-14 13:29:44,962 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:29:44,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110817611] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:29:44,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [326819889] [2022-12-14 13:29:44,964 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 13:29:44,964 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:29:44,965 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:29:44,965 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:29:44,965 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:29:44,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:44,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:44,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 13:29:44,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:44,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:44,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:44,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:44,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:44,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-12-14 13:29:45,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 13:29:45,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:45,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-12-14 13:29:45,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 13:29:45,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:45,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-12-14 13:29:45,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:45,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:45,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 13:29:45,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:45,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-12-14 13:29:45,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:45,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-12-14 13:29:45,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:45,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:45,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:45,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-14 13:29:45,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:45,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-12-14 13:29:45,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:45,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:45,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:45,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:45,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:45,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:45,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:45,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:45,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:45,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2022-12-14 13:29:45,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:45,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:45,223 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 13:29:45,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 345 treesize of output 327 [2022-12-14 13:29:45,254 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 13:29:45,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 339 treesize of output 346 [2022-12-14 13:29:45,287 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 13:29:45,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 333 treesize of output 340 [2022-12-14 13:29:45,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:45,507 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 13:29:45,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 672 treesize of output 673 [2022-12-14 13:29:45,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:45,545 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:29:45,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 653 treesize of output 634 [2022-12-14 13:29:45,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:45,589 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 13:29:45,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 658 treesize of output 659 [2022-12-14 13:29:45,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:45,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:45,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:45,933 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:45,938 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-12-14 13:29:45,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 374 treesize of output 359 [2022-12-14 13:29:45,957 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:45,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:45,969 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-12-14 13:29:45,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 370 treesize of output 363 [2022-12-14 13:29:45,982 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:45,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:45,992 INFO L321 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2022-12-14 13:29:45,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 448 treesize of output 441 [2022-12-14 13:29:46,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:46,140 INFO L321 Elim1Store]: treesize reduction 170, result has 13.7 percent of original size [2022-12-14 13:29:46,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 473 treesize of output 477 [2022-12-14 13:29:46,311 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 13:29:46,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 339 treesize of output 346 [2022-12-14 13:29:46,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:46,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:46,328 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 13:29:46,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 339 treesize of output 321 [2022-12-14 13:29:46,357 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 13:29:46,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 333 treesize of output 340 [2022-12-14 13:29:46,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:46,566 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:29:46,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 659 treesize of output 640 [2022-12-14 13:29:46,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:46,611 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 13:29:46,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 664 treesize of output 665 [2022-12-14 13:29:46,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:46,649 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 13:29:46,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 658 treesize of output 659 [2022-12-14 13:29:46,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:46,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:47,012 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:29:47,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 352 treesize of output 345 [2022-12-14 13:29:47,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:47,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:47,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:47,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:47,041 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-12-14 13:29:47,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 428 treesize of output 413 [2022-12-14 13:29:47,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:47,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:47,070 INFO L321 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2022-12-14 13:29:47,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 424 treesize of output 417 [2022-12-14 13:29:47,226 INFO L321 Elim1Store]: treesize reduction 27, result has 32.5 percent of original size [2022-12-14 13:29:47,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 29 [2022-12-14 13:29:47,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:47,254 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:29:47,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 84 treesize of output 62 [2022-12-14 13:29:47,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:47,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 45 [2022-12-14 13:29:47,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:29:47,383 INFO L321 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2022-12-14 13:29:47,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 45 [2022-12-14 13:29:47,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:29:47,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:29:47,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:29:47,534 INFO L321 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2022-12-14 13:29:47,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 45 [2022-12-14 13:29:47,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:29:47,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:29:47,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:29:47,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 13:29:47,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 13:29:47,660 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:29:51,354 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2940#(and (<= 0 |ULTIMATE.start_sll_remove_first_#in~head#1.offset|) (not (= |ULTIMATE.start_sll_remove_first_#t~mem8#1.offset| 0)) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_remove_first_~head#1.base|) |ULTIMATE.start_sll_remove_first_~head#1.offset|) |ULTIMATE.start_sll_remove_first_#t~mem8#1.base|) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_sll_remove_first_~head#1.base|) 1) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_remove_first_#in~head#1.base|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 0 |ULTIMATE.start_sll_remove_first_~head#1.offset|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_remove_first_~head#1.base|) |ULTIMATE.start_sll_remove_first_~head#1.offset|) |ULTIMATE.start_sll_remove_first_#t~mem8#1.offset|) (<= |ULTIMATE.start_sll_remove_first_~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_remove_first_~head#1.base|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~i~0#1| 1) (<= (+ |ULTIMATE.start_sll_remove_first_~head#1.offset| 4) (select |#length| |ULTIMATE.start_sll_remove_first_~head#1.base|)) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (<= |ULTIMATE.start_sll_remove_first_#in~head#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 13:29:51,355 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:29:51,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:29:51,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 36 [2022-12-14 13:29:51,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240573154] [2022-12-14 13:29:51,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:29:51,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-14 13:29:51,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:29:51,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-14 13:29:51,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=2181, Unknown=0, NotChecked=0, Total=2450 [2022-12-14 13:29:51,356 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 37 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 37 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:29:51,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:29:51,923 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2022-12-14 13:29:51,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-14 13:29:51,923 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 37 states have internal predecessors, (59), 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 25 [2022-12-14 13:29:51,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:29:51,923 INFO L225 Difference]: With dead ends: 65 [2022-12-14 13:29:51,923 INFO L226 Difference]: Without dead ends: 65 [2022-12-14 13:29:51,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=690, Invalid=3732, Unknown=0, NotChecked=0, Total=4422 [2022-12-14 13:29:51,924 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 396 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:29:51,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 175 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:29:51,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-12-14 13:29:51,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 43. [2022-12-14 13:29:51,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 42 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) [2022-12-14 13:29:51,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2022-12-14 13:29:51,927 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 25 [2022-12-14 13:29:51,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:29:51,927 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2022-12-14 13:29:51,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 37 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:29:51,927 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2022-12-14 13:29:51,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-14 13:29:51,928 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:29:51,928 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 13:29:51,932 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 13:29:52,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:29:52,130 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 13:29:52,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:29:52,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1625575738, now seen corresponding path program 1 times [2022-12-14 13:29:52,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:29:52,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696216824] [2022-12-14 13:29:52,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:52,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:29:52,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:52,555 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:29:52,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:29:52,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696216824] [2022-12-14 13:29:52,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696216824] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:29:52,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346865686] [2022-12-14 13:29:52,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:52,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:29:52,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:29:52,557 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:29:52,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 13:29:52,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:52,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 51 conjunts are in the unsatisfiable core [2022-12-14 13:29:52,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:29:52,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:29:52,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-12-14 13:29:52,947 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:29:52,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2022-12-14 13:29:53,034 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:29:53,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 12 [2022-12-14 13:29:53,038 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:29:53,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:29:53,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2022-12-14 13:29:53,361 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:29:53,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 124 treesize of output 134 [2022-12-14 13:29:53,640 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:29:53,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346865686] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:29:53,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1961260028] [2022-12-14 13:29:53,641 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 13:29:53,641 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:29:53,641 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:29:53,641 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:29:53,641 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:29:53,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:53,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:53,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 13:29:53,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:53,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:53,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:53,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:53,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:53,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-12-14 13:29:53,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:53,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-12-14 13:29:53,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 13:29:53,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 13:29:53,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:53,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-12-14 13:29:53,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:53,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-12-14 13:29:53,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:53,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:53,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 13:29:53,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:53,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-12-14 13:29:53,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:53,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:53,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:53,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-14 13:29:53,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:53,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-12-14 13:29:53,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:53,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:53,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:53,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:53,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:53,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:53,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:53,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:53,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:53,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2022-12-14 13:29:53,898 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 13:29:53,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 339 treesize of output 346 [2022-12-14 13:29:53,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:53,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:53,915 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 13:29:53,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 339 treesize of output 321 [2022-12-14 13:29:53,944 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 13:29:53,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 333 treesize of output 340 [2022-12-14 13:29:54,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:54,319 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:29:54,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 1155 treesize of output 1104 [2022-12-14 13:29:54,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:54,371 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 13:29:54,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 1152 treesize of output 1147 [2022-12-14 13:29:54,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:54,419 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 13:29:54,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 1140 treesize of output 1135 [2022-12-14 13:29:54,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:54,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:54,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:54,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:54,989 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-12-14 13:29:54,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 352 treesize of output 337 [2022-12-14 13:29:55,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:55,004 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:55,014 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:29:55,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 348 treesize of output 341 [2022-12-14 13:29:55,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:55,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:55,036 INFO L321 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2022-12-14 13:29:55,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 414 treesize of output 407 [2022-12-14 13:29:55,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:55,165 INFO L321 Elim1Store]: treesize reduction 170, result has 13.7 percent of original size [2022-12-14 13:29:55,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 415 treesize of output 419 [2022-12-14 13:29:55,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:55,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:55,307 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 13:29:55,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 345 treesize of output 327 [2022-12-14 13:29:55,333 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 13:29:55,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 339 treesize of output 346 [2022-12-14 13:29:55,361 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 13:29:55,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 333 treesize of output 340 [2022-12-14 13:29:55,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:55,737 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:29:55,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 1155 treesize of output 1104 [2022-12-14 13:29:55,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:55,791 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 13:29:55,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 1152 treesize of output 1147 [2022-12-14 13:29:55,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:55,836 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 13:29:55,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 1140 treesize of output 1135 [2022-12-14 13:29:56,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:56,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:56,394 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-12-14 13:29:56,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 352 treesize of output 345 [2022-12-14 13:29:56,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:56,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:56,421 INFO L321 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2022-12-14 13:29:56,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 376 treesize of output 369 [2022-12-14 13:29:56,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:56,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:56,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:56,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:56,442 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-12-14 13:29:56,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 446 treesize of output 431 [2022-12-14 13:29:56,571 INFO L321 Elim1Store]: treesize reduction 27, result has 32.5 percent of original size [2022-12-14 13:29:56,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 29 [2022-12-14 13:29:56,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:56,610 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:29:56,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 84 treesize of output 62 [2022-12-14 13:29:56,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:56,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 45 [2022-12-14 13:29:56,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:29:56,721 INFO L321 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2022-12-14 13:29:56,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 45 [2022-12-14 13:29:56,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:29:56,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:29:56,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:29:56,871 INFO L321 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2022-12-14 13:29:56,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 45 [2022-12-14 13:29:56,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:29:56,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:29:56,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:29:56,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 13:29:56,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 13:29:56,991 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:30:00,497 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3282#(and (<= 0 |ULTIMATE.start_sll_remove_first_#in~head#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_remove_first_~head#1.base|) |ULTIMATE.start_sll_remove_first_~head#1.offset|) |ULTIMATE.start_sll_remove_first_#t~mem8#1.base|) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_sll_remove_first_~head#1.base|) 1) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_remove_first_#in~head#1.base|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 0 |ULTIMATE.start_sll_remove_first_~head#1.offset|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_remove_first_~head#1.base|) |ULTIMATE.start_sll_remove_first_~head#1.offset|) |ULTIMATE.start_sll_remove_first_#t~mem8#1.offset|) (<= |ULTIMATE.start_sll_remove_first_~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_remove_first_~head#1.base|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start_sll_remove_first_#t~mem8#1.offset| 0) (<= (+ |ULTIMATE.start_sll_remove_first_~head#1.offset| 4) (select |#length| |ULTIMATE.start_sll_remove_first_~head#1.base|)) (not (< |ULTIMATE.start_sll_remove_first_#t~mem8#1.base| |#StackHeapBarrier|)) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (<= |ULTIMATE.start_sll_remove_first_#in~head#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 13:30:00,497 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:30:00,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:30:00,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 36 [2022-12-14 13:30:00,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451576413] [2022-12-14 13:30:00,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:30:00,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-14 13:30:00,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:30:00,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-14 13:30:00,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=2210, Unknown=0, NotChecked=0, Total=2450 [2022-12-14 13:30:00,499 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 37 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 37 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:30:01,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:30:01,502 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2022-12-14 13:30:01,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 13:30:01,502 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 37 states have internal predecessors, (60), 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 26 [2022-12-14 13:30:01,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:30:01,502 INFO L225 Difference]: With dead ends: 64 [2022-12-14 13:30:01,502 INFO L226 Difference]: Without dead ends: 64 [2022-12-14 13:30:01,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 35 SyntacticMatches, 7 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1096 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=645, Invalid=3777, Unknown=0, NotChecked=0, Total=4422 [2022-12-14 13:30:01,504 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 386 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:30:01,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [386 Valid, 96 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:30:01,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-12-14 13:30:01,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 44. [2022-12-14 13:30:01,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 43 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:30:01,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2022-12-14 13:30:01,505 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 26 [2022-12-14 13:30:01,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:30:01,505 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2022-12-14 13:30:01,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 37 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:30:01,505 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2022-12-14 13:30:01,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-14 13:30:01,506 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:30:01,506 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2022-12-14 13:30:01,511 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 13:30:01,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-14 13:30:01,708 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 13:30:01,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:30:01,708 INFO L85 PathProgramCache]: Analyzing trace with hash -601219092, now seen corresponding path program 2 times [2022-12-14 13:30:01,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:30:01,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906179491] [2022-12-14 13:30:01,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:30:01,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:30:01,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:30:01,769 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 13:30:01,770 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:30:01,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906179491] [2022-12-14 13:30:01,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906179491] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:30:01,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:30:01,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 13:30:01,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644620125] [2022-12-14 13:30:01,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:30:01,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 13:30:01,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:30:01,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 13:30:01,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:30:01,771 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:30:01,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:30:01,802 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2022-12-14 13:30:01,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 13:30:01,803 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 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 31 [2022-12-14 13:30:01,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:30:01,803 INFO L225 Difference]: With dead ends: 35 [2022-12-14 13:30:01,803 INFO L226 Difference]: Without dead ends: 35 [2022-12-14 13:30:01,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-12-14 13:30:01,804 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 27 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:30:01,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 36 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:30:01,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-12-14 13:30:01,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-12-14 13:30:01,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 34 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:30:01,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2022-12-14 13:30:01,806 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 31 [2022-12-14 13:30:01,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:30:01,806 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2022-12-14 13:30:01,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:30:01,806 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2022-12-14 13:30:01,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-12-14 13:30:01,807 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:30:01,807 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 13:30:01,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-14 13:30:01,807 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 13:30:01,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:30:01,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1456317775, now seen corresponding path program 2 times [2022-12-14 13:30:01,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:30:01,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944540727] [2022-12-14 13:30:01,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:30:01,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:30:01,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:30:02,760 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:30:02,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:30:02,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944540727] [2022-12-14 13:30:02,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944540727] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:30:02,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102422510] [2022-12-14 13:30:02,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:30:02,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:30:02,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:30:02,761 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:30:02,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 13:30:02,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 13:30:02,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:30:02,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 84 conjunts are in the unsatisfiable core [2022-12-14 13:30:02,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:30:03,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 13:30:03,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-12-14 13:30:04,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:04,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:30:04,015 INFO L321 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2022-12-14 13:30:04,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 58 [2022-12-14 13:30:04,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:30:04,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:04,274 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:30:04,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 41 [2022-12-14 13:30:04,514 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_sll_remove_first_#t~mem8#1.base_45| Int) (|v_ULTIMATE.start_main_~#s~0#1.base_19| Int) (v_arrayElimCell_660 Int) (v_ArrVal_1314 Int)) (let ((.cse1 (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#s~0#1.base_19| v_ArrVal_1314))) (let ((.cse0 (store .cse1 |v_ULTIMATE.start_sll_remove_first_#t~mem8#1.base_45| 1))) (and (= (select .cse0 v_arrayElimCell_660) 0) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#s~0#1.base_19|) 0) (= (select .cse1 |v_ULTIMATE.start_sll_remove_first_#t~mem8#1.base_45|) 0) (= |c_#valid| (store (store (store .cse0 v_arrayElimCell_660 0) |v_ULTIMATE.start_sll_remove_first_#t~mem8#1.base_45| 0) |v_ULTIMATE.start_main_~#s~0#1.base_19| 0)))))) is different from true [2022-12-14 13:30:04,515 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:30:04,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:30:05,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-12-14 13:30:07,019 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_antiDerIndex_entry0_1 Int)) (= (select |c_ULTIMATE.start_main_old_#valid#1| v_antiDerIndex_entry0_1) (select (store (let ((.cse1 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_remove_first_~head#1.base|))) (let ((.cse0 (select .cse1 |c_ULTIMATE.start_sll_remove_first_~head#1.offset|))) (store (store |c_#valid| .cse0 0) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_remove_first_~head#1.base| (store .cse1 |c_ULTIMATE.start_sll_remove_first_~head#1.offset| (select (select |c_#memory_$Pointer$.base| .cse0) 4))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 0))) |c_ULTIMATE.start_main_~#s~0#1.base| 0) v_antiDerIndex_entry0_1))) is different from false [2022-12-14 13:30:09,026 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_antiDerIndex_entry0_1 Int)) (= (select |c_ULTIMATE.start_main_old_#valid#1| v_antiDerIndex_entry0_1) (select (store (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (store (store |c_#valid| .cse0 0) (select (select |c_#memory_$Pointer$.base| .cse0) 4) 0)) |c_ULTIMATE.start_main_~#s~0#1.base| 0) v_antiDerIndex_entry0_1))) is different from false [2022-12-14 13:30:11,129 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:30:11,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 181 treesize of output 183 [2022-12-14 13:32:52,525 WARN L233 SmtUtils]: Spent 2.61m on a formula simplification. DAG size of input: 279 DAG size of output: 66 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:33:16,661 WARN L233 SmtUtils]: Spent 23.90s on a formula simplification that was a NOOP. DAG size: 67 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:33:18,449 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2022-12-14 13:33:18,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102422510] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:33:18,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2002897485] [2022-12-14 13:33:18,450 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-12-14 13:33:18,450 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:33:18,451 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:33:18,451 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:33:18,451 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:33:18,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:18,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:18,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 13:33:18,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:18,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:18,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:18,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:18,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:18,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-12-14 13:33:18,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:18,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-12-14 13:33:18,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 13:33:18,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 13:33:18,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:18,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-12-14 13:33:18,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:18,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:18,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 13:33:18,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:18,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-12-14 13:33:18,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:18,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:18,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:18,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-14 13:33:18,588 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:33:18,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-12-14 13:33:18,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:33:18,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-12-14 13:33:18,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:18,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:18,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:18,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:18,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:18,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:18,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:18,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:18,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:18,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2022-12-14 13:33:18,716 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 13:33:18,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 346 treesize of output 353 [2022-12-14 13:33:18,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:18,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:18,738 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 13:33:18,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 346 treesize of output 328 [2022-12-14 13:33:18,781 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 13:33:18,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 340 treesize of output 347 [2022-12-14 13:33:18,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:18,921 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 13:33:18,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 373 treesize of output 374 [2022-12-14 13:33:18,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:18,970 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 13:33:18,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 367 treesize of output 368 [2022-12-14 13:33:18,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:33:19,009 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:33:19,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 348 treesize of output 349 [2022-12-14 13:33:19,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:33:19,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:33:19,236 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-12-14 13:33:19,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 393 treesize of output 386 [2022-12-14 13:33:19,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:19,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:19,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:19,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:33:19,260 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-12-14 13:33:19,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 493 treesize of output 478 [2022-12-14 13:33:19,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:33:19,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:33:19,289 INFO L321 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2022-12-14 13:33:19,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 489 treesize of output 482 [2022-12-14 13:33:19,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:19,456 INFO L321 Elim1Store]: treesize reduction 170, result has 13.7 percent of original size [2022-12-14 13:33:19,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 532 treesize of output 528 [2022-12-14 13:33:19,645 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 13:33:19,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 346 treesize of output 353 [2022-12-14 13:33:19,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:19,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:19,665 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 13:33:19,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 346 treesize of output 328 [2022-12-14 13:33:19,701 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 13:33:19,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 340 treesize of output 347 [2022-12-14 13:33:19,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:33:19,867 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:33:19,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 360 treesize of output 361 [2022-12-14 13:33:19,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:19,910 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 13:33:19,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 369 treesize of output 370 [2022-12-14 13:33:19,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:19,950 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 13:33:19,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 363 treesize of output 364 [2022-12-14 13:33:20,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:33:20,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:33:20,384 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:33:20,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 352 treesize of output 345 [2022-12-14 13:33:20,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:33:20,400 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:33:20,413 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:33:20,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 364 treesize of output 357 [2022-12-14 13:33:20,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:20,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:20,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:20,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:33:20,436 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-12-14 13:33:20,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 440 treesize of output 425 [2022-12-14 13:33:20,594 INFO L321 Elim1Store]: treesize reduction 27, result has 32.5 percent of original size [2022-12-14 13:33:20,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 29 [2022-12-14 13:33:20,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:20,625 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:33:20,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 84 treesize of output 62 [2022-12-14 13:33:20,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:20,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 45 [2022-12-14 13:33:20,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:33:20,753 INFO L321 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2022-12-14 13:33:20,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 45 [2022-12-14 13:33:20,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:33:20,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:33:20,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:33:20,986 INFO L321 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2022-12-14 13:33:20,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 45 [2022-12-14 13:33:21,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:33:21,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:33:21,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:33:21,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 13:33:21,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 13:33:21,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 13:33:21,206 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:33:27,049 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3761#(and (< |ULTIMATE.start_main_~i~0#1| 0) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (exists ((|v_ULTIMATE.start_main_~#s~0#1.base_20| Int)) (and (<= 0 |v_ULTIMATE.start_main_~#s~0#1.base_20|) (= (select |#valid| |v_ULTIMATE.start_main_~#s~0#1.base_20|) 0) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_main_~#s~0#1.base_20|) 0) 0) (<= 4 (select |#length| |v_ULTIMATE.start_main_~#s~0#1.base_20|)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~#s~0#1.base_20|) 0) 0))) (= |ULTIMATE.start_main_#res#1| 0) (= |#NULL.base| 0))' at error location [2022-12-14 13:33:27,050 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:33:27,050 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:33:27,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 54 [2022-12-14 13:33:27,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819950339] [2022-12-14 13:33:27,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:33:27,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-12-14 13:33:27,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:33:27,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-12-14 13:33:27,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=4453, Unknown=3, NotChecked=408, Total=5112 [2022-12-14 13:33:27,051 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 56 states, 55 states have (on average 1.6545454545454545) internal successors, (91), 55 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:33:33,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:33:33,971 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2022-12-14 13:33:33,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 13:33:33,971 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.6545454545454545) internal successors, (91), 55 states have internal predecessors, (91), 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 32 [2022-12-14 13:33:33,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:33:33,972 INFO L225 Difference]: With dead ends: 62 [2022-12-14 13:33:33,972 INFO L226 Difference]: Without dead ends: 61 [2022-12-14 13:33:33,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1440 ImplicationChecksByTransitivity, 203.3s TimeCoverageRelationStatistics Valid=472, Invalid=7369, Unknown=3, NotChecked=528, Total=8372 [2022-12-14 13:33:33,973 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 95 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 1004 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-12-14 13:33:33,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 117 Invalid, 1168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1004 Invalid, 0 Unknown, 137 Unchecked, 2.4s Time] [2022-12-14 13:33:33,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-12-14 13:33:33,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2022-12-14 13:33:33,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 58 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:33:33,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2022-12-14 13:33:33,974 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 32 [2022-12-14 13:33:33,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:33:33,974 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2022-12-14 13:33:33,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.6545454545454545) internal successors, (91), 55 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:33:33,975 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2022-12-14 13:33:33,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-12-14 13:33:33,975 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:33:33,975 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 13:33:33,980 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 13:33:34,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:33:34,177 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 13:33:34,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:33:34,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1456317840, now seen corresponding path program 1 times [2022-12-14 13:33:34,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:33:34,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228870069] [2022-12-14 13:33:34,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:33:34,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:33:34,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:33:35,478 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:33:35,478 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:33:35,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228870069] [2022-12-14 13:33:35,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228870069] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:33:35,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22697073] [2022-12-14 13:33:35,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:33:35,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:33:35,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:33:35,479 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:33:35,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 13:33:35,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:33:35,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 110 conjunts are in the unsatisfiable core [2022-12-14 13:33:35,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:33:35,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:33:35,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:33:35,817 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 13:33:35,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-14 13:33:35,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 13:33:35,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 13:33:35,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 13:33:35,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 13:33:35,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 13:33:35,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-14 13:33:36,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:36,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:33:36,697 INFO L321 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-12-14 13:33:36,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 55 [2022-12-14 13:33:36,721 INFO L321 Elim1Store]: treesize reduction 18, result has 62.5 percent of original size [2022-12-14 13:33:36,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 60 [2022-12-14 13:33:36,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 13:33:36,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 42 [2022-12-14 13:33:37,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:37,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:33:37,925 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-12-14 13:33:37,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 101 treesize of output 84 [2022-12-14 13:33:37,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:37,933 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 13:33:37,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 58 [2022-12-14 13:33:38,085 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 13:33:38,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 40 [2022-12-14 13:33:38,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:38,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2022-12-14 13:33:38,094 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:33:38,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:33:39,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2022-12-14 13:33:40,246 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:33:40,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 271 treesize of output 214 [2022-12-14 13:33:40,950 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:33:40,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 460 treesize of output 331 [2022-12-14 13:33:40,960 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:33:40,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 320 treesize of output 251 [2022-12-14 13:33:41,393 INFO L321 Elim1Store]: treesize reduction 8, result has 97.6 percent of original size [2022-12-14 13:33:41,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 11 new quantified variables, introduced 28 case distinctions, treesize of input 1670 treesize of output 1795 [2022-12-14 13:33:41,950 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:33:41,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 11 new quantified variables, introduced 28 case distinctions, treesize of input 4016 treesize of output 3913 [2022-12-14 13:33:42,158 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:33:42,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 3062 treesize of output 2938 [2022-12-14 13:33:42,364 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:33:42,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 3034 treesize of output 2924 [2022-12-14 13:33:42,620 INFO L321 Elim1Store]: treesize reduction 8, result has 84.9 percent of original size [2022-12-14 13:33:42,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 2985 treesize of output 2889 [2022-12-14 13:33:42,804 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:33:42,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2570 treesize of output 2588 [2022-12-14 13:33:43,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3172 treesize of output 3018 [2022-12-14 13:33:43,350 INFO L321 Elim1Store]: treesize reduction 8, result has 84.9 percent of original size [2022-12-14 13:33:43,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 2903 treesize of output 2531 [2022-12-14 13:33:54,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:33:54,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:33:54,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:33:54,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:33:56,288 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:33:56,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 71 [2022-12-14 13:33:56,664 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:33:56,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22697073] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:33:56,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2017030236] [2022-12-14 13:33:56,665 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-12-14 13:33:56,665 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:33:56,665 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:33:56,665 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:33:56,666 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:33:56,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:56,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:56,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 13:33:56,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:56,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:56,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:56,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:56,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:56,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-12-14 13:33:56,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 13:33:56,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 13:33:56,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:56,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-12-14 13:33:56,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:56,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-12-14 13:33:56,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:56,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-12-14 13:33:56,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:56,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:56,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 13:33:56,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:33:56,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-12-14 13:33:56,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:33:56,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-12-14 13:33:56,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:56,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:56,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:56,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-14 13:33:56,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:56,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:56,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:56,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:56,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:56,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:56,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:56,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:56,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:56,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2022-12-14 13:33:56,946 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 13:33:56,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 339 treesize of output 346 [2022-12-14 13:33:56,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:56,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:56,966 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 13:33:56,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 339 treesize of output 321 [2022-12-14 13:33:57,005 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 13:33:57,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 333 treesize of output 340 [2022-12-14 13:33:57,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:57,208 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 13:33:57,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 672 treesize of output 673 [2022-12-14 13:33:57,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:33:57,256 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:33:57,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 653 treesize of output 634 [2022-12-14 13:33:57,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:57,307 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 13:33:57,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 658 treesize of output 659 [2022-12-14 13:33:57,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:33:57,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:33:57,617 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-12-14 13:33:57,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 370 treesize of output 363 [2022-12-14 13:33:57,632 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:33:57,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:33:57,650 INFO L321 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2022-12-14 13:33:57,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 448 treesize of output 441 [2022-12-14 13:33:57,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:57,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:57,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:57,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:33:57,677 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-12-14 13:33:57,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 488 treesize of output 473 [2022-12-14 13:33:57,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:57,833 INFO L321 Elim1Store]: treesize reduction 170, result has 13.7 percent of original size [2022-12-14 13:33:57,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 473 treesize of output 477 [2022-12-14 13:33:57,994 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 13:33:57,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 339 treesize of output 346 [2022-12-14 13:33:58,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:58,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:58,017 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 13:33:58,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 339 treesize of output 321 [2022-12-14 13:33:58,055 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 13:33:58,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 333 treesize of output 340 [2022-12-14 13:33:58,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:58,251 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 13:33:58,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 672 treesize of output 673 [2022-12-14 13:33:58,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:33:58,306 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:33:58,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 653 treesize of output 634 [2022-12-14 13:33:58,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:58,365 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 13:33:58,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 658 treesize of output 659 [2022-12-14 13:33:58,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:33:58,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:33:58,728 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-12-14 13:33:58,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 369 treesize of output 362 [2022-12-14 13:33:58,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:33:58,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:33:58,763 INFO L321 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2022-12-14 13:33:58,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 405 treesize of output 398 [2022-12-14 13:33:58,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:58,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:58,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:58,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:33:58,791 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-12-14 13:33:58,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 487 treesize of output 472 [2022-12-14 13:33:58,947 INFO L321 Elim1Store]: treesize reduction 27, result has 32.5 percent of original size [2022-12-14 13:33:58,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 29 [2022-12-14 13:33:58,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:58,979 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:33:58,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 84 treesize of output 62 [2022-12-14 13:33:58,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:58,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 45 [2022-12-14 13:33:59,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:33:59,093 INFO L321 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2022-12-14 13:33:59,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 45 [2022-12-14 13:33:59,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:33:59,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:33:59,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:33:59,227 INFO L321 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2022-12-14 13:33:59,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 45 [2022-12-14 13:33:59,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:33:59,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:33:59,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:33:59,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 13:33:59,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 13:33:59,362 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:34:04,983 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4188#(and (or (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) 0)) (not (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) 0))) (< |ULTIMATE.start_main_~i~0#1| 0) (= (select |#valid| |ULTIMATE.start_main_~#s~0#1.base|) 1) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= (+ |ULTIMATE.start_main_~#s~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#s~0#1.base|)) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-12-14 13:34:04,983 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:34:04,983 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:34:04,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 63 [2022-12-14 13:34:04,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121741215] [2022-12-14 13:34:04,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:34:04,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-12-14 13:34:04,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:34:04,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-12-14 13:34:04,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=5855, Unknown=5, NotChecked=0, Total=6162 [2022-12-14 13:34:04,985 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 64 states, 64 states have (on average 1.40625) internal successors, (90), 63 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:34:10,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:34:10,323 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2022-12-14 13:34:10,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 13:34:10,323 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.40625) internal successors, (90), 63 states have internal predecessors, (90), 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 32 [2022-12-14 13:34:10,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:34:10,324 INFO L225 Difference]: With dead ends: 61 [2022-12-14 13:34:10,324 INFO L226 Difference]: Without dead ends: 42 [2022-12-14 13:34:10,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2164 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=677, Invalid=9620, Unknown=5, NotChecked=0, Total=10302 [2022-12-14 13:34:10,325 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 107 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 1304 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 1345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 13:34:10,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 174 Invalid, 1345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1304 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 13:34:10,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-12-14 13:34:10,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2022-12-14 13:34:10,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 39 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:34:10,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2022-12-14 13:34:10,326 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 32 [2022-12-14 13:34:10,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:34:10,327 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2022-12-14 13:34:10,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.40625) internal successors, (90), 63 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:34:10,327 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2022-12-14 13:34:10,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-14 13:34:10,327 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:34:10,327 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 13:34:10,331 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 13:34:10,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-14 13:34:10,528 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 13:34:10,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:34:10,529 INFO L85 PathProgramCache]: Analyzing trace with hash -872668482, now seen corresponding path program 3 times [2022-12-14 13:34:10,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:34:10,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079462305] [2022-12-14 13:34:10,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:34:10,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:34:10,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:34:10,594 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 13:34:10,594 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:34:10,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079462305] [2022-12-14 13:34:10,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079462305] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:34:10,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81154443] [2022-12-14 13:34:10,595 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:34:10,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:34:10,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:34:10,595 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:34:10,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 13:34:10,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:34:10,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:34:10,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 106 conjunts are in the unsatisfiable core [2022-12-14 13:34:10,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:34:10,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:34:10,787 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 13:34:10,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-14 13:34:10,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2022-12-14 13:34:10,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2022-12-14 13:34:10,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2022-12-14 13:34:10,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-12-14 13:34:11,096 INFO L321 Elim1Store]: treesize reduction 51, result has 46.3 percent of original size [2022-12-14 13:34:11,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 52 treesize of output 65 [2022-12-14 13:34:11,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-12-14 13:34:11,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-12-14 13:34:12,139 INFO L321 Elim1Store]: treesize reduction 140, result has 36.7 percent of original size [2022-12-14 13:34:12,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 144 treesize of output 151 [2022-12-14 13:34:12,769 INFO L321 Elim1Store]: treesize reduction 24, result has 87.6 percent of original size [2022-12-14 13:34:12,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 162 treesize of output 251 [2022-12-14 13:34:12,802 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:34:12,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 116 [2022-12-14 13:34:13,898 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:34:13,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:34:13,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 13:34:14,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-12-14 13:34:14,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 78 [2022-12-14 13:34:14,683 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:34:14,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 87 [2022-12-14 13:34:14,695 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_4 (Array Int Int)) (|ULTIMATE.start_main_~#s~0#1.offset| Int) (|ULTIMATE.start_main_~#s~0#1.base| Int)) (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_arrayElimArr_4))) (let ((.cse1 (select .cse0 |ULTIMATE.start_main_~#s~0#1.base|))) (let ((.cse3 (select .cse1 |ULTIMATE.start_main_~#s~0#1.offset|))) (let ((.cse2 (select (select .cse0 .cse3) 4))) (or (not (= (select (select (store .cse0 |ULTIMATE.start_main_~#s~0#1.base| (store .cse1 |ULTIMATE.start_main_~#s~0#1.offset| .cse2)) .cse2) 4) 0)) (not (= |c_ULTIMATE.start_node_create_~temp~0#1.base| .cse3)) (not (= |c_ULTIMATE.start_sll_create_~head~0#1.base| (select v_arrayElimArr_4 (+ 4 |c_ULTIMATE.start_node_create_~temp~0#1.offset|)))) (= .cse2 |ULTIMATE.start_main_~#s~0#1.base|))))))) is different from false [2022-12-14 13:34:14,829 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:34:14,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 169 treesize of output 89 [2022-12-14 13:34:14,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:34:14,936 INFO L321 Elim1Store]: treesize reduction 16, result has 87.8 percent of original size [2022-12-14 13:34:14,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 20 case distinctions, treesize of input 511 treesize of output 509 [2022-12-14 13:34:14,971 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:34:14,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 427 treesize of output 393 [2022-12-14 13:34:15,004 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-14 13:34:15,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-12-14 13:34:15,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-12-14 13:34:15,168 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:34:15,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 17 [2022-12-14 13:34:15,185 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 18 refuted. 1 times theorem prover too weak. 0 trivial. 6 not checked. [2022-12-14 13:34:15,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81154443] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:34:15,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1239599771] [2022-12-14 13:34:15,186 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-12-14 13:34:15,186 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:34:15,187 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:34:15,187 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:34:15,187 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:34:15,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:34:15,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:34:15,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 13:34:15,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:34:15,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:34:15,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:34:15,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:34:15,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:34:15,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-12-14 13:34:15,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:34:15,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-12-14 13:34:15,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 13:34:15,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 13:34:15,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:34:15,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-12-14 13:34:15,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:34:15,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-12-14 13:34:15,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:34:15,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:34:15,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 13:34:15,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:34:15,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:34:15,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:34:15,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-14 13:34:15,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:34:15,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-12-14 13:34:15,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:34:15,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-12-14 13:34:15,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:34:15,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:34:15,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:34:15,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:34:15,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:34:15,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:34:15,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:34:15,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:34:15,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:34:15,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2022-12-14 13:34:15,449 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 13:34:15,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 339 treesize of output 346 [2022-12-14 13:34:15,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:34:15,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:34:15,473 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 13:34:15,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 339 treesize of output 321 [2022-12-14 13:34:15,512 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 13:34:15,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 333 treesize of output 340 [2022-12-14 13:34:15,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:34:15,949 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 13:34:15,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 1168 treesize of output 1163 [2022-12-14 13:34:15,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:34:15,999 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 13:34:16,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 1156 treesize of output 1151 [2022-12-14 13:34:16,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:34:16,049 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:34:16,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 1131 treesize of output 1080 [2022-12-14 13:34:16,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:34:16,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:34:16,529 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-12-14 13:34:16,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 362 treesize of output 355 [2022-12-14 13:34:16,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:34:16,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:34:16,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:34:16,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:34:16,559 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-12-14 13:34:16,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 438 treesize of output 423 [2022-12-14 13:34:16,572 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:34:16,573 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:34:16,585 INFO L321 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2022-12-14 13:34:16,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 434 treesize of output 427 [2022-12-14 13:34:16,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:34:16,718 INFO L321 Elim1Store]: treesize reduction 170, result has 13.7 percent of original size [2022-12-14 13:34:16,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 453 treesize of output 457 [2022-12-14 13:34:16,919 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 13:34:16,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 339 treesize of output 346 [2022-12-14 13:34:16,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:34:16,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:34:16,939 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 13:34:16,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 339 treesize of output 321 [2022-12-14 13:34:16,978 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 13:34:16,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 333 treesize of output 340 [2022-12-14 13:34:17,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:34:17,132 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 13:34:17,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 366 treesize of output 367 [2022-12-14 13:34:17,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:34:17,172 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 13:34:17,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 360 treesize of output 361 [2022-12-14 13:34:17,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:34:17,214 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:34:17,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 341 treesize of output 342 [2022-12-14 13:34:17,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:34:17,470 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:34:17,484 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-12-14 13:34:17,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 382 treesize of output 375 [2022-12-14 13:34:17,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:34:17,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:34:17,513 INFO L321 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2022-12-14 13:34:17,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 430 treesize of output 423 [2022-12-14 13:34:17,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:34:17,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:34:17,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:34:17,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:34:17,534 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-12-14 13:34:17,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 518 treesize of output 503 [2022-12-14 13:34:17,685 INFO L321 Elim1Store]: treesize reduction 27, result has 32.5 percent of original size [2022-12-14 13:34:17,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 29 [2022-12-14 13:34:17,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:34:17,722 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:34:17,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 84 treesize of output 62 [2022-12-14 13:34:17,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:34:17,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 45 [2022-12-14 13:34:17,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:34:17,851 INFO L321 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2022-12-14 13:34:17,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 45 [2022-12-14 13:34:17,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:34:17,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:34:17,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:34:18,010 INFO L321 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2022-12-14 13:34:18,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 45 [2022-12-14 13:34:18,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 13:34:18,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:34:18,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:34:18,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 13:34:18,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 13:34:18,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 13:34:18,171 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:34:22,800 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4613#(and (< |ULTIMATE.start_main_~i~0#1| 0) (exists ((|v_ULTIMATE.start_main_~#s~0#1.base_21| Int)) (and (<= 0 |v_ULTIMATE.start_main_~#s~0#1.base_21|) (= (select |#valid| |v_ULTIMATE.start_main_~#s~0#1.base_21|) 0) (= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_main_~#s~0#1.base_21|) 0)) (<= 4 (select |#length| |v_ULTIMATE.start_main_~#s~0#1.base_21|)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~#s~0#1.base_21|) 0) 0))) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |ULTIMATE.start_main_#res#1| 0) (= |#NULL.base| 0))' at error location [2022-12-14 13:34:22,800 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:34:22,800 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:34:22,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 26, 26] total 47 [2022-12-14 13:34:22,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209460341] [2022-12-14 13:34:22,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:34:22,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-12-14 13:34:22,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:34:22,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-12-14 13:34:22,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=3522, Unknown=7, NotChecked=120, Total=3906 [2022-12-14 13:34:22,802 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand has 47 states, 47 states have (on average 1.9148936170212767) internal successors, (90), 47 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:34:23,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:34:23,365 INFO L93 Difference]: Finished difference Result 12 states and 11 transitions. [2022-12-14 13:34:23,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 13:34:23,365 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9148936170212767) internal successors, (90), 47 states have internal predecessors, (90), 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 37 [2022-12-14 13:34:23,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:34:23,365 INFO L225 Difference]: With dead ends: 12 [2022-12-14 13:34:23,365 INFO L226 Difference]: Without dead ends: 0 [2022-12-14 13:34:23,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1292 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=306, Invalid=4246, Unknown=8, NotChecked=132, Total=4692 [2022-12-14 13:34:23,366 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 10 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:34:23,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 0 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 298 Invalid, 0 Unknown, 11 Unchecked, 0.3s Time] [2022-12-14 13:34:23,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-12-14 13:34:23,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-12-14 13:34:23,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:34:23,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-12-14 13:34:23,366 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 37 [2022-12-14 13:34:23,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:34:23,366 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-12-14 13:34:23,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.9148936170212767) internal successors, (90), 47 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:34:23,367 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-12-14 13:34:23,367 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-12-14 13:34:23,368 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 21 remaining) [2022-12-14 13:34:23,369 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 21 remaining) [2022-12-14 13:34:23,369 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 21 remaining) [2022-12-14 13:34:23,369 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 21 remaining) [2022-12-14 13:34:23,369 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 21 remaining) [2022-12-14 13:34:23,369 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 21 remaining) [2022-12-14 13:34:23,369 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 21 remaining) [2022-12-14 13:34:23,369 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 21 remaining) [2022-12-14 13:34:23,369 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 21 remaining) [2022-12-14 13:34:23,369 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 21 remaining) [2022-12-14 13:34:23,369 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 21 remaining) [2022-12-14 13:34:23,369 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 21 remaining) [2022-12-14 13:34:23,369 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE (8 of 21 remaining) [2022-12-14 13:34:23,369 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE (7 of 21 remaining) [2022-12-14 13:34:23,369 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE (6 of 21 remaining) [2022-12-14 13:34:23,370 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 21 remaining) [2022-12-14 13:34:23,370 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 21 remaining) [2022-12-14 13:34:23,370 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 21 remaining) [2022-12-14 13:34:23,370 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 21 remaining) [2022-12-14 13:34:23,370 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK (1 of 21 remaining) [2022-12-14 13:34:23,370 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK (0 of 21 remaining) [2022-12-14 13:34:23,374 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 13:34:23,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-14 13:34:23,579 INFO L445 BasicCegarLoop]: Path program histogram: [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:34:23,585 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 13:34:23,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 01:34:23 BoogieIcfgContainer [2022-12-14 13:34:23,588 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 13:34:23,588 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 13:34:23,588 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 13:34:23,588 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 13:34:23,588 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:28:45" (3/4) ... [2022-12-14 13:34:23,590 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-12-14 13:34:23,596 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 23 nodes and edges [2022-12-14 13:34:23,596 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2022-12-14 13:34:23,596 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-12-14 13:34:23,597 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-12-14 13:34:23,617 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/witness.graphml [2022-12-14 13:34:23,617 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 13:34:23,617 INFO L158 Benchmark]: Toolchain (without parser) took 339304.23ms. Allocated memory was 134.2MB in the beginning and 283.1MB in the end (delta: 148.9MB). Free memory was 102.0MB in the beginning and 159.7MB in the end (delta: -57.7MB). Peak memory consumption was 93.5MB. Max. memory is 16.1GB. [2022-12-14 13:34:23,618 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 134.2MB. Free memory was 108.8MB in the beginning and 108.7MB in the end (delta: 25.3kB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 13:34:23,618 INFO L158 Benchmark]: CACSL2BoogieTranslator took 330.61ms. Allocated memory is still 134.2MB. Free memory was 102.0MB in the beginning and 85.4MB in the end (delta: 16.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-12-14 13:34:23,618 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.70ms. Allocated memory is still 134.2MB. Free memory was 85.4MB in the beginning and 83.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 13:34:23,618 INFO L158 Benchmark]: Boogie Preprocessor took 25.90ms. Allocated memory is still 134.2MB. Free memory was 83.3MB in the beginning and 81.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 13:34:23,618 INFO L158 Benchmark]: RCFGBuilder took 318.47ms. Allocated memory is still 134.2MB. Free memory was 81.7MB in the beginning and 63.4MB in the end (delta: 18.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-12-14 13:34:23,618 INFO L158 Benchmark]: TraceAbstraction took 338560.87ms. Allocated memory was 134.2MB in the beginning and 283.1MB in the end (delta: 148.9MB). Free memory was 62.9MB in the beginning and 162.5MB in the end (delta: -99.6MB). Peak memory consumption was 51.5MB. Max. memory is 16.1GB. [2022-12-14 13:34:23,618 INFO L158 Benchmark]: Witness Printer took 29.51ms. Allocated memory is still 283.1MB. Free memory was 162.5MB in the beginning and 159.7MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 13:34:23,618 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 134.2MB. Free memory was 108.8MB in the beginning and 108.7MB in the end (delta: 25.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 330.61ms. Allocated memory is still 134.2MB. Free memory was 102.0MB in the beginning and 85.4MB in the end (delta: 16.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.70ms. Allocated memory is still 134.2MB. Free memory was 85.4MB in the beginning and 83.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 25.90ms. Allocated memory is still 134.2MB. Free memory was 83.3MB in the beginning and 81.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 318.47ms. Allocated memory is still 134.2MB. Free memory was 81.7MB in the beginning and 63.4MB in the end (delta: 18.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 338560.87ms. Allocated memory was 134.2MB in the beginning and 283.1MB in the end (delta: 148.9MB). Free memory was 62.9MB in the beginning and 162.5MB in the end (delta: -99.6MB). Peak memory consumption was 51.5MB. Max. memory is 16.1GB. * Witness Printer took 29.51ms. Allocated memory is still 283.1MB. Free memory was 162.5MB in the beginning and 159.7MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 594]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 594]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 594]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 609]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 597]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 41 locations, 21 error locations. Started 1 CEGAR loops. OverallTime: 338.5s, OverallIterations: 25, TraceHistogramMax: 3, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 21.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2968 SdHoareTripleChecker+Valid, 6.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2968 mSDsluCounter, 1557 SdHoareTripleChecker+Invalid, 5.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 188 IncrementalHoareTripleChecker+Unchecked, 1219 mSDsCounter, 189 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5513 IncrementalHoareTripleChecker+Invalid, 5890 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 189 mSolverCounterUnsat, 338 mSDtfsCounter, 5513 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1134 GetRequests, 413 SyntacticMatches, 26 SemanticMatches, 695 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 10281 ImplicationChecksByTransitivity, 266.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=23, InterpolantAutomatonStates: 248, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 25 MinimizatonAttempts, 223 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 242.8s InterpolantComputationTime, 728 NumberOfCodeBlocks, 727 NumberOfCodeBlocksAsserted, 41 NumberOfCheckSat, 939 ConstructedInterpolants, 133 QuantifiedInterpolants, 20845 SizeOfPredicates, 239 NumberOfNonLiveVariables, 3487 ConjunctsInSsa, 609 ConjunctsInUnsatCore, 48 InterpolantComputations, 14 PerfectInterpolantSequences, 184/469 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 21 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-12-14 13:34:23,814 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6704424e-7604-42ee-a27a-771e46f442cd/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE