./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/dll2c_update_all_reverse.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a 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_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2c_update_all_reverse.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur --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 5247496942546516118f3c28fa350944e097bdf15ee64734ca287a29ad51a034 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 22:32:24,969 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 22:32:24,972 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 22:32:25,015 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 22:32:25,015 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 22:32:25,019 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 22:32:25,022 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 22:32:25,026 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 22:32:25,029 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 22:32:25,035 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 22:32:25,037 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 22:32:25,040 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 22:32:25,041 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 22:32:25,043 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 22:32:25,045 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 22:32:25,047 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 22:32:25,050 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 22:32:25,051 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 22:32:25,054 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 22:32:25,061 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 22:32:25,063 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 22:32:25,066 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 22:32:25,068 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 22:32:25,069 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 22:32:25,081 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 22:32:25,082 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 22:32:25,083 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 22:32:25,084 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 22:32:25,086 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 22:32:25,087 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 22:32:25,088 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 22:32:25,089 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 22:32:25,091 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 22:32:25,094 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 22:32:25,096 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 22:32:25,097 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 22:32:25,097 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 22:32:25,098 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 22:32:25,098 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 22:32:25,100 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 22:32:25,101 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 22:32:25,102 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-25 22:32:25,153 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 22:32:25,153 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 22:32:25,154 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 22:32:25,154 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 22:32:25,157 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 22:32:25,157 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 22:32:25,157 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 22:32:25,158 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 22:32:25,158 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 22:32:25,158 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 22:32:25,159 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 22:32:25,160 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 22:32:25,160 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 22:32:25,160 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 22:32:25,160 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 22:32:25,161 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 22:32:25,161 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 22:32:25,161 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 22:32:25,162 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 22:32:25,162 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 22:32:25,163 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 22:32:25,163 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 22:32:25,163 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 22:32:25,164 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 22:32:25,164 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 22:32:25,165 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 22:32:25,165 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 22:32:25,165 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 22:32:25,165 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 22:32:25,166 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 22:32:25,166 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 22:32:25,166 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 22:32:25,167 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 22:32:25,167 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 22:32:25,167 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 22:32:25,168 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:32:25,168 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 22:32:25,168 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 22:32:25,168 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 22:32:25,169 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 22:32:25,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 22:32:25,169 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 22:32:25,169 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_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5247496942546516118f3c28fa350944e097bdf15ee64734ca287a29ad51a034 [2022-11-25 22:32:25,514 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 22:32:25,561 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 22:32:25,564 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 22:32:25,565 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 22:32:25,566 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 22:32:25,567 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/list-simple/dll2c_update_all_reverse.i [2022-11-25 22:32:29,138 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 22:32:29,506 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 22:32:29,507 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/sv-benchmarks/c/list-simple/dll2c_update_all_reverse.i [2022-11-25 22:32:29,530 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/data/7f05c7fe0/1a3c8f8aa9fb4fbb8199337a5db93540/FLAG5ae8dd086 [2022-11-25 22:32:29,557 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/data/7f05c7fe0/1a3c8f8aa9fb4fbb8199337a5db93540 [2022-11-25 22:32:29,564 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 22:32:29,567 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 22:32:29,572 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 22:32:29,572 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 22:32:29,577 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 22:32:29,579 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:32:29" (1/1) ... [2022-11-25 22:32:29,580 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2517638a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:32:29, skipping insertion in model container [2022-11-25 22:32:29,580 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:32:29" (1/1) ... [2022-11-25 22:32:29,589 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 22:32:29,654 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 22:32:30,124 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_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/sv-benchmarks/c/list-simple/dll2c_update_all_reverse.i[24556,24569] [2022-11-25 22:32:30,130 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:32:30,145 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 22:32:30,224 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_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/sv-benchmarks/c/list-simple/dll2c_update_all_reverse.i[24556,24569] [2022-11-25 22:32:30,226 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:32:30,267 INFO L208 MainTranslator]: Completed translation [2022-11-25 22:32:30,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:32:30 WrapperNode [2022-11-25 22:32:30,268 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 22:32:30,269 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 22:32:30,270 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 22:32:30,270 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 22:32:30,279 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:32:30" (1/1) ... [2022-11-25 22:32:30,318 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:32:30" (1/1) ... [2022-11-25 22:32:30,357 INFO L138 Inliner]: procedures = 126, calls = 29, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 137 [2022-11-25 22:32:30,357 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 22:32:30,358 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 22:32:30,358 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 22:32:30,359 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 22:32:30,372 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:32:30" (1/1) ... [2022-11-25 22:32:30,373 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:32:30" (1/1) ... [2022-11-25 22:32:30,390 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:32:30" (1/1) ... [2022-11-25 22:32:30,401 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:32:30" (1/1) ... [2022-11-25 22:32:30,409 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:32:30" (1/1) ... [2022-11-25 22:32:30,420 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:32:30" (1/1) ... [2022-11-25 22:32:30,422 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:32:30" (1/1) ... [2022-11-25 22:32:30,428 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:32:30" (1/1) ... [2022-11-25 22:32:30,431 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 22:32:30,433 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 22:32:30,434 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 22:32:30,434 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 22:32:30,436 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:32:30" (1/1) ... [2022-11-25 22:32:30,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:32:30,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:32:30,471 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 22:32:30,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 22:32:30,516 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 22:32:30,516 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 22:32:30,517 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2022-11-25 22:32:30,517 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2022-11-25 22:32:30,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 22:32:30,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 22:32:30,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-25 22:32:30,518 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-25 22:32:30,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 22:32:30,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 22:32:30,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 22:32:30,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 22:32:30,720 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 22:32:30,723 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 22:32:31,170 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 22:32:31,263 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 22:32:31,263 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-25 22:32:31,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:32:31 BoogieIcfgContainer [2022-11-25 22:32:31,267 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 22:32:31,270 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 22:32:31,270 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 22:32:31,274 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 22:32:31,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 10:32:29" (1/3) ... [2022-11-25 22:32:31,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4922cac8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:32:31, skipping insertion in model container [2022-11-25 22:32:31,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:32:30" (2/3) ... [2022-11-25 22:32:31,277 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4922cac8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:32:31, skipping insertion in model container [2022-11-25 22:32:31,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:32:31" (3/3) ... [2022-11-25 22:32:31,279 INFO L112 eAbstractionObserver]: Analyzing ICFG dll2c_update_all_reverse.i [2022-11-25 22:32:31,306 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 22:32:31,306 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2022-11-25 22:32:31,387 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 22:32:31,395 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;@17c3bb53, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 22:32:31,396 INFO L358 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2022-11-25 22:32:31,402 INFO L276 IsEmpty]: Start isEmpty. Operand has 76 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 72 states have internal predecessors, (82), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:32:31,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-25 22:32:31,411 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:32:31,412 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 22:32:31,413 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-25 22:32:31,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:32:31,422 INFO L85 PathProgramCache]: Analyzing trace with hash 212482511, now seen corresponding path program 1 times [2022-11-25 22:32:31,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:32:31,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778812902] [2022-11-25 22:32:31,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:32:31,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:32:31,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:32:31,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:32:31,756 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:32:31,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778812902] [2022-11-25 22:32:31,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778812902] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:32:31,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:32:31,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 22:32:31,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175218014] [2022-11-25 22:32:31,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:32:31,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:32:31,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:32:31,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:32:31,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:32:31,848 INFO L87 Difference]: Start difference. First operand has 76 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 72 states have internal predecessors, (82), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:32:32,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:32:32,052 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2022-11-25 22:32:32,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:32:32,058 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-25 22:32:32,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:32:32,069 INFO L225 Difference]: With dead ends: 73 [2022-11-25 22:32:32,070 INFO L226 Difference]: Without dead ends: 71 [2022-11-25 22:32:32,075 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 [2022-11-25 22:32:32,085 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 8 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:32:32,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 94 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:32:32,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-25 22:32:32,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-11-25 22:32:32,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 37 states have (on average 2.027027027027027) internal successors, (75), 67 states have internal predecessors, (75), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:32:32,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2022-11-25 22:32:32,148 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 5 [2022-11-25 22:32:32,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:32:32,149 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2022-11-25 22:32:32,150 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:32:32,150 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2022-11-25 22:32:32,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-25 22:32:32,151 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:32:32,151 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 22:32:32,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 22:32:32,153 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-25 22:32:32,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:32:32,155 INFO L85 PathProgramCache]: Analyzing trace with hash 212482512, now seen corresponding path program 1 times [2022-11-25 22:32:32,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:32:32,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973979305] [2022-11-25 22:32:32,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:32:32,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:32:32,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:32:32,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:32:32,362 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:32:32,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973979305] [2022-11-25 22:32:32,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973979305] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:32:32,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:32:32,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 22:32:32,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195448478] [2022-11-25 22:32:32,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:32:32,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:32:32,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:32:32,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:32:32,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:32:32,368 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:32:32,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:32:32,461 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2022-11-25 22:32:32,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:32:32,462 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-25 22:32:32,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:32:32,463 INFO L225 Difference]: With dead ends: 68 [2022-11-25 22:32:32,464 INFO L226 Difference]: Without dead ends: 68 [2022-11-25 22:32:32,464 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 [2022-11-25 22:32:32,466 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 3 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:32:32,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 98 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:32:32,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-25 22:32:32,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-11-25 22:32:32,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 37 states have (on average 1.945945945945946) internal successors, (72), 64 states have internal predecessors, (72), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:32:32,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2022-11-25 22:32:32,476 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 5 [2022-11-25 22:32:32,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:32:32,476 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2022-11-25 22:32:32,477 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:32:32,477 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2022-11-25 22:32:32,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-25 22:32:32,478 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:32:32,478 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:32:32,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 22:32:32,479 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-25 22:32:32,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:32:32,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1836044477, now seen corresponding path program 1 times [2022-11-25 22:32:32,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:32:32,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748311380] [2022-11-25 22:32:32,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:32:32,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:32:32,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:32:32,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:32:32,591 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:32:32,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748311380] [2022-11-25 22:32:32,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748311380] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:32:32,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:32:32,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:32:32,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549194553] [2022-11-25 22:32:32,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:32:32,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:32:32,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:32:32,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:32:32,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:32:32,599 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-25 22:32:32,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:32:32,692 INFO L93 Difference]: Finished difference Result 79 states and 89 transitions. [2022-11-25 22:32:32,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:32:32,693 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-11-25 22:32:32,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:32:32,696 INFO L225 Difference]: With dead ends: 79 [2022-11-25 22:32:32,697 INFO L226 Difference]: Without dead ends: 79 [2022-11-25 22:32:32,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:32:32,702 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 10 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:32:32,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 115 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:32:32,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-25 22:32:32,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2022-11-25 22:32:32,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 65 states have internal predecessors, (73), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:32:32,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2022-11-25 22:32:32,723 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 11 [2022-11-25 22:32:32,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:32:32,724 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2022-11-25 22:32:32,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-25 22:32:32,725 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2022-11-25 22:32:32,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-25 22:32:32,726 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:32:32,727 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:32:32,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 22:32:32,728 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-25 22:32:32,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:32:32,732 INFO L85 PathProgramCache]: Analyzing trace with hash -772939555, now seen corresponding path program 1 times [2022-11-25 22:32:32,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:32:32,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053661701] [2022-11-25 22:32:32,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:32:32,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:32:32,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:32:33,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 22:32:33,070 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:32:33,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053661701] [2022-11-25 22:32:33,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053661701] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:32:33,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:32:33,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 22:32:33,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043681720] [2022-11-25 22:32:33,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:32:33,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 22:32:33,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:32:33,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 22:32:33,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:32:33,074 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 22:32:33,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:32:33,333 INFO L93 Difference]: Finished difference Result 88 states and 97 transitions. [2022-11-25 22:32:33,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 22:32:33,334 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-11-25 22:32:33,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:32:33,339 INFO L225 Difference]: With dead ends: 88 [2022-11-25 22:32:33,340 INFO L226 Difference]: Without dead ends: 88 [2022-11-25 22:32:33,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:32:33,352 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 63 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:32:33,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 156 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:32:33,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-25 22:32:33,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 68. [2022-11-25 22:32:33,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 38 states have (on average 1.894736842105263) internal successors, (72), 64 states have internal predecessors, (72), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:32:33,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2022-11-25 22:32:33,367 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 19 [2022-11-25 22:32:33,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:32:33,367 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2022-11-25 22:32:33,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 22:32:33,371 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2022-11-25 22:32:33,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-25 22:32:33,372 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:32:33,372 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:32:33,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 22:32:33,373 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-25 22:32:33,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:32:33,374 INFO L85 PathProgramCache]: Analyzing trace with hash -772939554, now seen corresponding path program 1 times [2022-11-25 22:32:33,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:32:33,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178708358] [2022-11-25 22:32:33,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:32:33,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:32:33,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:32:33,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 22:32:33,745 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:32:33,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178708358] [2022-11-25 22:32:33,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178708358] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:32:33,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:32:33,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 22:32:33,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447108841] [2022-11-25 22:32:33,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:32:33,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 22:32:33,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:32:33,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 22:32:33,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:32:33,749 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand has 6 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 22:32:33,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:32:33,979 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2022-11-25 22:32:33,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 22:32:33,981 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-11-25 22:32:33,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:32:33,983 INFO L225 Difference]: With dead ends: 68 [2022-11-25 22:32:33,984 INFO L226 Difference]: Without dead ends: 68 [2022-11-25 22:32:33,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:32:33,992 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 63 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:32:33,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 165 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:32:33,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-25 22:32:33,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2022-11-25 22:32:33,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 38 states have (on average 1.868421052631579) internal successors, (71), 63 states have internal predecessors, (71), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:32:33,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2022-11-25 22:32:33,999 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 19 [2022-11-25 22:32:34,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:32:34,000 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2022-11-25 22:32:34,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 22:32:34,000 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2022-11-25 22:32:34,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-25 22:32:34,001 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:32:34,001 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:32:34,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 22:32:34,002 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-25 22:32:34,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:32:34,002 INFO L85 PathProgramCache]: Analyzing trace with hash 234429566, now seen corresponding path program 1 times [2022-11-25 22:32:34,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:32:34,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965007150] [2022-11-25 22:32:34,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:32:34,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:32:34,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:32:34,413 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:32:34,414 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:32:34,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965007150] [2022-11-25 22:32:34,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965007150] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:32:34,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136951941] [2022-11-25 22:32:34,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:32:34,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:32:34,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:32:34,419 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:32:34,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 22:32:34,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:32:34,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 22:32:34,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:32:34,678 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 [2022-11-25 22:32:34,752 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)) (exists ((v_ArrVal_198 Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| v_ArrVal_198))))) is different from true [2022-11-25 22:32:34,836 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 22:32:34,837 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 [2022-11-25 22:32:34,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-11-25 22:32:34,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:32:34,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136951941] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:32:34,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1094809787] [2022-11-25 22:32:34,980 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-25 22:32:34,981 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:32:34,987 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:32:34,993 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:32:34,994 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:32:35,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 22:32:35,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 22:32:35,130 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 [2022-11-25 22:32:35,140 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 15 treesize of output 1 [2022-11-25 22:32:35,147 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 [2022-11-25 22:32:35,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:32:35,166 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 21 treesize of output 20 [2022-11-25 22:32:35,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:32:35,181 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 21 treesize of output 20 [2022-11-25 22:32:35,192 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 19 treesize of output 1 [2022-11-25 22:32:35,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:32:35,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:32:35,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-25 22:32:35,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:32:35,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:32:35,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-25 22:32:35,239 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 [2022-11-25 22:32:35,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 198 [2022-11-25 22:32:35,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-25 22:32:36,011 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 5 treesize of output 3 [2022-11-25 22:32:36,025 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 13 treesize of output 9 [2022-11-25 22:32:36,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:32:36,043 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 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-25 22:32:36,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:32:36,061 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 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-25 22:32:36,080 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:32:36,083 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:32:36,087 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:32:36,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 198 [2022-11-25 22:32:36,523 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:32:36,542 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:32:36,556 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 5 treesize of output 3 [2022-11-25 22:32:36,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 22:32:36,583 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 5 treesize of output 3 [2022-11-25 22:32:36,602 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:32:36,605 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:32:36,608 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:32:36,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-25 22:32:36,738 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 23 treesize of output 11 [2022-11-25 22:32:36,756 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 21 [2022-11-25 22:32:36,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 198 [2022-11-25 22:32:37,031 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 80 for LOIs [2022-11-25 22:32:37,506 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:32:43,609 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '910#(and (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 4) 0) (= (select |#valid| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 1) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 4) 0) (not (= |ULTIMATE.start_dll_circular_create_~new_head~0#1.base| 0)) (<= 0 |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (<= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (= |ULTIMATE.start_dll_circular_create_~data#1| |ULTIMATE.start_dll_circular_create_#in~data#1|) (= |ULTIMATE.start_dll_circular_create_#in~len#1| |ULTIMATE.start_main_~len~0#1|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (< |ULTIMATE.start_dll_circular_create_~head~0#1.base| |#StackHeapBarrier|) (= |ULTIMATE.start_dll_circular_create_#in~len#1| |ULTIMATE.start_dll_circular_create_~len#1|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (= |ULTIMATE.start_main_~data~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 8) |ULTIMATE.start_dll_circular_create_~data#1|) (= (select |#length| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 12) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_dll_circular_create_~data#1|) (not (= |ULTIMATE.start_dll_circular_create_~head~0#1.base| 0)) (< |ULTIMATE.start_dll_circular_create_~new_head~0#1.base| |#StackHeapBarrier|) (= |ULTIMATE.start_dll_circular_create_~head~0#1.base| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (= |ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 0) (<= |ULTIMATE.start_dll_circular_create_~data#1| 1) (not (= (select |#valid| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) 1)) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:32:43,610 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:32:43,610 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:32:43,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2022-11-25 22:32:43,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135691439] [2022-11-25 22:32:43,611 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:32:43,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 22:32:43,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:32:43,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 22:32:43,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=434, Unknown=1, NotChecked=42, Total=552 [2022-11-25 22:32:43,613 INFO L87 Difference]: Start difference. First operand 67 states and 75 transitions. Second operand has 11 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 22:32:44,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:32:44,054 INFO L93 Difference]: Finished difference Result 93 states and 103 transitions. [2022-11-25 22:32:44,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 22:32:44,056 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2022-11-25 22:32:44,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:32:44,057 INFO L225 Difference]: With dead ends: 93 [2022-11-25 22:32:44,057 INFO L226 Difference]: Without dead ends: 93 [2022-11-25 22:32:44,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=94, Invalid=509, Unknown=1, NotChecked=46, Total=650 [2022-11-25 22:32:44,059 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 52 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:32:44,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 200 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 279 Invalid, 0 Unknown, 70 Unchecked, 0.3s Time] [2022-11-25 22:32:44,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-25 22:32:44,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 72. [2022-11-25 22:32:44,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 67 states have internal predecessors, (77), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 22:32:44,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 83 transitions. [2022-11-25 22:32:44,067 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 83 transitions. Word has length 21 [2022-11-25 22:32:44,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:32:44,067 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 83 transitions. [2022-11-25 22:32:44,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 22:32:44,068 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 83 transitions. [2022-11-25 22:32:44,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-25 22:32:44,069 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:32:44,069 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:32:44,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 22:32:44,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:32:44,280 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-25 22:32:44,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:32:44,281 INFO L85 PathProgramCache]: Analyzing trace with hash 234429567, now seen corresponding path program 1 times [2022-11-25 22:32:44,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:32:44,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330728084] [2022-11-25 22:32:44,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:32:44,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:32:44,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:32:44,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:32:44,856 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:32:44,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330728084] [2022-11-25 22:32:44,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330728084] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:32:44,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993418228] [2022-11-25 22:32:44,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:32:44,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:32:44,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:32:44,859 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:32:44,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 22:32:45,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:32:45,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 22:32:45,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:32:45,053 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 [2022-11-25 22:32:45,235 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)) (exists ((v_ArrVal_295 Int)) (= (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_295) |c_#length|)))) is different from true [2022-11-25 22:32:45,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:32:45,292 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 [2022-11-25 22:32:45,302 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 22:32:45,302 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 [2022-11-25 22:32:45,351 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-11-25 22:32:45,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:32:47,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993418228] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:32:47,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1419476548] [2022-11-25 22:32:47,550 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-25 22:32:47,550 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:32:47,550 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:32:47,550 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:32:47,550 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:32:47,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 22:32:47,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 22:32:47,588 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 [2022-11-25 22:32:47,595 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 [2022-11-25 22:32:47,601 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 15 treesize of output 1 [2022-11-25 22:32:47,610 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 19 treesize of output 1 [2022-11-25 22:32:47,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:32:47,617 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 21 treesize of output 20 [2022-11-25 22:32:47,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:32:47,626 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 21 treesize of output 20 [2022-11-25 22:32:47,638 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 [2022-11-25 22:32:47,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:32:47,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:32:47,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-25 22:32:47,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:32:47,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:32:47,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-25 22:32:47,832 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:32:47,843 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 5 treesize of output 3 [2022-11-25 22:32:47,854 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:32:47,865 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 5 treesize of output 3 [2022-11-25 22:32:47,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 22:32:47,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 22:32:47,941 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:32:47,953 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 5 treesize of output 3 [2022-11-25 22:32:47,963 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 5 treesize of output 3 [2022-11-25 22:32:47,973 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:32:48,032 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 21 [2022-11-25 22:32:48,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-25 22:32:48,061 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 23 treesize of output 11 [2022-11-25 22:32:48,115 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 84 for LOIs [2022-11-25 22:32:48,506 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:32:54,612 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1185#(and (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 4) 0) (= (select |#valid| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 1) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 4) 0) (not (= |ULTIMATE.start_dll_circular_create_~new_head~0#1.base| 0)) (<= 0 |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (<= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (= |ULTIMATE.start_dll_circular_create_~data#1| |ULTIMATE.start_dll_circular_create_#in~data#1|) (= |ULTIMATE.start_dll_circular_create_#in~len#1| |ULTIMATE.start_main_~len~0#1|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (< |ULTIMATE.start_dll_circular_create_~head~0#1.base| |#StackHeapBarrier|) (= |ULTIMATE.start_dll_circular_create_#in~len#1| |ULTIMATE.start_dll_circular_create_~len#1|) (< (select |#length| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 8)) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (= |ULTIMATE.start_main_~data~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 8) |ULTIMATE.start_dll_circular_create_~data#1|) (= (select |#length| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 12) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_dll_circular_create_~data#1|) (not (= |ULTIMATE.start_dll_circular_create_~head~0#1.base| 0)) (< |ULTIMATE.start_dll_circular_create_~new_head~0#1.base| |#StackHeapBarrier|) (= |ULTIMATE.start_dll_circular_create_~head~0#1.base| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (= |ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 0) (<= |ULTIMATE.start_dll_circular_create_~data#1| 1) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:32:54,613 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:32:54,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:32:54,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2022-11-25 22:32:54,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414353037] [2022-11-25 22:32:54,613 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:32:54,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 22:32:54,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:32:54,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 22:32:54,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=764, Unknown=1, NotChecked=56, Total=930 [2022-11-25 22:32:54,615 INFO L87 Difference]: Start difference. First operand 72 states and 83 transitions. Second operand has 17 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 14 states have internal predecessors, (33), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-25 22:32:55,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:32:55,243 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2022-11-25 22:32:55,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 22:32:55,244 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 14 states have internal predecessors, (33), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 21 [2022-11-25 22:32:55,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:32:55,245 INFO L225 Difference]: With dead ends: 74 [2022-11-25 22:32:55,245 INFO L226 Difference]: Without dead ends: 74 [2022-11-25 22:32:55,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=131, Invalid=864, Unknown=1, NotChecked=60, Total=1056 [2022-11-25 22:32:55,247 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 6 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:32:55,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 313 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 418 Invalid, 0 Unknown, 74 Unchecked, 0.4s Time] [2022-11-25 22:32:55,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-25 22:32:55,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2022-11-25 22:32:55,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 67 states have internal predecessors, (76), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 22:32:55,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2022-11-25 22:32:55,269 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 21 [2022-11-25 22:32:55,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:32:55,270 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2022-11-25 22:32:55,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 14 states have internal predecessors, (33), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-25 22:32:55,270 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2022-11-25 22:32:55,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-25 22:32:55,271 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:32:55,271 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:32:55,284 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-25 22:32:55,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:32:55,472 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-25 22:32:55,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:32:55,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1948673775, now seen corresponding path program 1 times [2022-11-25 22:32:55,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:32:55,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734660681] [2022-11-25 22:32:55,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:32:55,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:32:55,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:32:55,631 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 22:32:55,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:32:55,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734660681] [2022-11-25 22:32:55,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734660681] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:32:55,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994350071] [2022-11-25 22:32:55,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:32:55,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:32:55,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:32:55,634 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:32:55,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 22:32:55,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:32:55,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 22:32:55,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:32:55,825 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 22:32:55,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:32:55,873 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 22:32:55,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994350071] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:32:55,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [945326912] [2022-11-25 22:32:55,879 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-25 22:32:55,880 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:32:55,880 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:32:55,880 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:32:55,881 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:32:55,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 22:32:55,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 22:32:55,929 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 [2022-11-25 22:32:55,936 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 [2022-11-25 22:32:55,942 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 15 treesize of output 1 [2022-11-25 22:32:55,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:32:55,954 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 21 treesize of output 20 [2022-11-25 22:32:55,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:32:55,963 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 21 treesize of output 20 [2022-11-25 22:32:55,970 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 19 treesize of output 1 [2022-11-25 22:32:55,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:32:55,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:32:55,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-25 22:32:55,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:32:55,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:32:55,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-25 22:32:56,006 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 [2022-11-25 22:32:56,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 198 [2022-11-25 22:32:56,396 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 5 treesize of output 3 [2022-11-25 22:32:56,408 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 13 treesize of output 9 [2022-11-25 22:32:56,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-25 22:32:56,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:32:56,435 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 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-25 22:32:56,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:32:56,450 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 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-25 22:32:56,463 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:32:56,465 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:32:56,472 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:32:56,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 198 [2022-11-25 22:32:56,754 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:32:56,766 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:32:56,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 22:32:56,790 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 5 treesize of output 3 [2022-11-25 22:32:56,802 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 5 treesize of output 3 [2022-11-25 22:32:56,817 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:32:56,820 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:32:56,822 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:32:56,893 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 21 [2022-11-25 22:32:56,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-25 22:32:56,925 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 23 treesize of output 11 [2022-11-25 22:32:57,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 198 [2022-11-25 22:32:57,209 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 13 treesize of output 9 [2022-11-25 22:32:57,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-25 22:32:57,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:32:57,234 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 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-25 22:32:57,246 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 5 treesize of output 3 [2022-11-25 22:32:57,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:32:57,260 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 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-25 22:32:57,282 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:32:57,285 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:32:57,288 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:32:57,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 198 [2022-11-25 22:32:57,583 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 13 treesize of output 9 [2022-11-25 22:32:57,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:32:57,597 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 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-25 22:32:57,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-25 22:32:57,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:32:57,621 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 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-25 22:32:57,633 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 5 treesize of output 3 [2022-11-25 22:32:57,645 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:32:57,648 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:32:57,650 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:32:57,653 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:32:57,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:32:57,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:32:57,808 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 248 treesize of output 232 [2022-11-25 22:32:57,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:32:57,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:32:57,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:32:57,827 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 246 treesize of output 233 [2022-11-25 22:32:57,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:32:57,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:32:57,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:32:57,848 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 240 treesize of output 227 [2022-11-25 22:32:57,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 198 [2022-11-25 22:32:58,137 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 80 for LOIs [2022-11-25 22:32:58,534 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:33:04,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [945326912] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:33:04,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:33:04,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [6, 6, 6] total 17 [2022-11-25 22:33:04,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141154435] [2022-11-25 22:33:04,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:33:04,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 22:33:04,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:33:04,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 22:33:04,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-11-25 22:33:04,327 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand has 13 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 9 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:33:07,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:33:07,284 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2022-11-25 22:33:07,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 22:33:07,285 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 9 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2022-11-25 22:33:07,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:33:07,288 INFO L225 Difference]: With dead ends: 78 [2022-11-25 22:33:07,288 INFO L226 Difference]: Without dead ends: 78 [2022-11-25 22:33:07,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-11-25 22:33:07,289 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 2 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 1 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:33:07,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 213 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 676 Invalid, 6 Unknown, 0 Unchecked, 2.3s Time] [2022-11-25 22:33:07,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-25 22:33:07,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-11-25 22:33:07,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 47 states have (on average 1.702127659574468) internal successors, (80), 72 states have internal predecessors, (80), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 22:33:07,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2022-11-25 22:33:07,296 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 23 [2022-11-25 22:33:07,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:33:07,296 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2022-11-25 22:33:07,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 9 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:33:07,297 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2022-11-25 22:33:07,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-25 22:33:07,298 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:33:07,298 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:33:07,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 22:33:07,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-25 22:33:07,506 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-25 22:33:07,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:33:07,507 INFO L85 PathProgramCache]: Analyzing trace with hash 274381008, now seen corresponding path program 1 times [2022-11-25 22:33:07,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:33:07,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145756085] [2022-11-25 22:33:07,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:33:07,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:33:07,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:33:07,672 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:33:07,673 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:33:07,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145756085] [2022-11-25 22:33:07,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145756085] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:33:07,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234827667] [2022-11-25 22:33:07,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:33:07,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:33:07,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:33:07,675 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:33:07,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 22:33:07,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:33:07,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 22:33:07,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:33:07,869 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:33:07,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:33:07,884 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-25 22:33:07,885 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 12 treesize of output 11 [2022-11-25 22:33:07,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:33:07,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234827667] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:33:07,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1444225419] [2022-11-25 22:33:07,915 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-25 22:33:07,915 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:33:07,916 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:33:07,916 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:33:07,916 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:33:07,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 22:33:07,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 22:33:07,950 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 11 treesize of output 7 [2022-11-25 22:33:07,957 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 [2022-11-25 22:33:07,963 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 15 treesize of output 1 [2022-11-25 22:33:07,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:07,973 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 21 treesize of output 20 [2022-11-25 22:33:07,980 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 19 treesize of output 1 [2022-11-25 22:33:07,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:07,988 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 21 treesize of output 20 [2022-11-25 22:33:08,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:08,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:08,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-25 22:33:08,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:08,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:08,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-25 22:33:08,021 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 [2022-11-25 22:33:08,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 22:33:08,158 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 5 treesize of output 3 [2022-11-25 22:33:08,168 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 5 treesize of output 3 [2022-11-25 22:33:08,179 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:33:08,193 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:33:08,245 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 5 treesize of output 3 [2022-11-25 22:33:08,257 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 5 treesize of output 3 [2022-11-25 22:33:08,269 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:33:08,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 22:33:08,296 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:33:08,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-25 22:33:08,363 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 21 [2022-11-25 22:33:08,380 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 23 treesize of output 11 [2022-11-25 22:33:08,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:08,453 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 22:33:08,454 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 1 case distinctions, treesize of input 28 treesize of output 34 [2022-11-25 22:33:08,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:08,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-25 22:33:08,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:08,506 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 22:33:08,507 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 1 case distinctions, treesize of input 28 treesize of output 30 [2022-11-25 22:33:08,560 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:08,573 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 22:33:08,573 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 1 case distinctions, treesize of input 28 treesize of output 30 [2022-11-25 22:33:08,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:08,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-25 22:33:08,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:08,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:08,630 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 22:33:08,631 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 1 case distinctions, treesize of input 28 treesize of output 34 [2022-11-25 22:33:08,763 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 5 treesize of output 3 [2022-11-25 22:33:08,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 22:33:08,784 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 5 treesize of output 3 [2022-11-25 22:33:08,796 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:33:08,807 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:33:08,865 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:33:08,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 22:33:08,888 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 5 treesize of output 3 [2022-11-25 22:33:08,899 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:33:08,910 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 5 treesize of output 3 [2022-11-25 22:33:08,998 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 21 [2022-11-25 22:33:09,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-25 22:33:09,051 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 23 treesize of output 11 [2022-11-25 22:33:09,082 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 84 for LOIs [2022-11-25 22:33:09,484 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:33:15,534 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1799#(and (<= 2 |ULTIMATE.start_dll_circular_create_#in~len#1|) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (<= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~data#1| 1) (<= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (not (= (select |#valid| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) 1)) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 1 |ULTIMATE.start_dll_circular_create_#in~data#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_dll_circular_create_~data#1|) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 2) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= |ULTIMATE.start_dll_circular_create_~data#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-25 22:33:15,534 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:33:15,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:33:15,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 4 [2022-11-25 22:33:15,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837862631] [2022-11-25 22:33:15,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:33:15,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 22:33:15,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:33:15,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 22:33:15,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=320, Unknown=2, NotChecked=0, Total=380 [2022-11-25 22:33:15,537 INFO L87 Difference]: Start difference. First operand 78 states and 86 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 22:33:15,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:33:15,741 INFO L93 Difference]: Finished difference Result 102 states and 112 transitions. [2022-11-25 22:33:15,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 22:33:15,748 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-11-25 22:33:15,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:33:15,753 INFO L225 Difference]: With dead ends: 102 [2022-11-25 22:33:15,754 INFO L226 Difference]: Without dead ends: 102 [2022-11-25 22:33:15,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=72, Invalid=388, Unknown=2, NotChecked=0, Total=462 [2022-11-25 22:33:15,758 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 97 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:33:15,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 119 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:33:15,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-11-25 22:33:15,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 81. [2022-11-25 22:33:15,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 50 states have (on average 1.7) internal successors, (85), 75 states have internal predecessors, (85), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 22:33:15,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2022-11-25 22:33:15,783 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 24 [2022-11-25 22:33:15,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:33:15,783 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2022-11-25 22:33:15,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 22:33:15,791 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2022-11-25 22:33:15,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-25 22:33:15,791 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:33:15,792 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:33:15,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 22:33:15,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:33:15,999 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-25 22:33:16,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:33:16,000 INFO L85 PathProgramCache]: Analyzing trace with hash 274381009, now seen corresponding path program 1 times [2022-11-25 22:33:16,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:33:16,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762570488] [2022-11-25 22:33:16,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:33:16,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:33:16,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:33:16,229 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 22:33:16,230 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:33:16,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762570488] [2022-11-25 22:33:16,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762570488] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:33:16,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035940210] [2022-11-25 22:33:16,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:33:16,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:33:16,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:33:16,232 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:33:16,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 22:33:16,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:33:16,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 22:33:16,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:33:16,542 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 22:33:16,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:33:16,583 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:33:16,583 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 20 treesize of output 24 [2022-11-25 22:33:16,775 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 22:33:16,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035940210] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:33:16,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [786266756] [2022-11-25 22:33:16,778 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-25 22:33:16,779 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:33:16,779 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:33:16,779 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:33:16,780 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:33:16,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 22:33:16,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 22:33:16,828 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 [2022-11-25 22:33:16,834 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 [2022-11-25 22:33:16,840 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 15 treesize of output 1 [2022-11-25 22:33:16,849 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 19 treesize of output 1 [2022-11-25 22:33:16,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:16,856 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 21 treesize of output 20 [2022-11-25 22:33:16,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:16,865 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 21 treesize of output 20 [2022-11-25 22:33:16,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:16,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:16,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-25 22:33:16,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:16,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:16,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-25 22:33:16,901 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 [2022-11-25 22:33:17,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 22:33:17,038 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:33:17,050 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 5 treesize of output 3 [2022-11-25 22:33:17,067 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:33:17,079 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 5 treesize of output 3 [2022-11-25 22:33:17,139 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:33:17,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 22:33:17,169 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 5 treesize of output 3 [2022-11-25 22:33:17,181 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 5 treesize of output 3 [2022-11-25 22:33:17,192 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:33:17,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:17,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:17,323 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 248 treesize of output 232 [2022-11-25 22:33:17,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:17,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:17,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:17,343 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:17,345 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 246 treesize of output 233 [2022-11-25 22:33:17,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:17,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:17,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:17,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:17,369 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 240 treesize of output 227 [2022-11-25 22:33:17,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:17,484 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 230 treesize of output 208 [2022-11-25 22:33:17,502 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:17,518 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-25 22:33:17,519 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 1 case distinctions, treesize of input 231 treesize of output 227 [2022-11-25 22:33:17,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:17,542 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:17,560 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-25 22:33:17,561 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 1 case distinctions, treesize of input 231 treesize of output 231 [2022-11-25 22:33:17,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:17,684 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 230 treesize of output 208 [2022-11-25 22:33:17,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:17,728 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-25 22:33:17,728 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 1 case distinctions, treesize of input 231 treesize of output 227 [2022-11-25 22:33:17,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:17,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:17,768 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-25 22:33:17,769 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 1 case distinctions, treesize of input 231 treesize of output 231 [2022-11-25 22:33:17,970 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:33:17,984 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:33:17,995 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 5 treesize of output 3 [2022-11-25 22:33:18,006 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 5 treesize of output 3 [2022-11-25 22:33:18,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 22:33:18,068 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 5 treesize of output 3 [2022-11-25 22:33:18,078 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:33:18,091 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:33:18,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 22:33:18,115 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 5 treesize of output 3 [2022-11-25 22:33:18,187 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 [2022-11-25 22:33:18,194 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 [2022-11-25 22:33:18,203 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 [2022-11-25 22:33:18,231 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 84 for LOIs [2022-11-25 22:33:18,643 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:33:25,160 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2154#(and (< (select |#length| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 4)) (<= 2 |ULTIMATE.start_dll_circular_create_#in~len#1|) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (<= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~data#1| 1) (<= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 1 |ULTIMATE.start_dll_circular_create_#in~data#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_dll_circular_create_~data#1|) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 2) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= |ULTIMATE.start_dll_circular_create_~data#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-25 22:33:25,161 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:33:25,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:33:25,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2022-11-25 22:33:25,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007114515] [2022-11-25 22:33:25,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:33:25,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 22:33:25,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:33:25,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 22:33:25,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2022-11-25 22:33:25,164 INFO L87 Difference]: Start difference. First operand 81 states and 91 transitions. Second operand has 15 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 13 states have internal predecessors, (43), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-25 22:33:25,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:33:25,579 INFO L93 Difference]: Finished difference Result 127 states and 142 transitions. [2022-11-25 22:33:25,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 22:33:25,580 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 13 states have internal predecessors, (43), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 24 [2022-11-25 22:33:25,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:33:25,581 INFO L225 Difference]: With dead ends: 127 [2022-11-25 22:33:25,581 INFO L226 Difference]: Without dead ends: 127 [2022-11-25 22:33:25,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2022-11-25 22:33:25,582 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 160 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:33:25,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 385 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 22:33:25,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-25 22:33:25,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 81. [2022-11-25 22:33:25,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 50 states have (on average 1.68) internal successors, (84), 75 states have internal predecessors, (84), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 22:33:25,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2022-11-25 22:33:25,590 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 24 [2022-11-25 22:33:25,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:33:25,590 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2022-11-25 22:33:25,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 13 states have internal predecessors, (43), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-25 22:33:25,591 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2022-11-25 22:33:25,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-25 22:33:25,592 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:33:25,592 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:33:25,605 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-25 22:33:25,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:33:25,799 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-25 22:33:25,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:33:25,800 INFO L85 PathProgramCache]: Analyzing trace with hash -84123339, now seen corresponding path program 1 times [2022-11-25 22:33:25,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:33:25,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757509822] [2022-11-25 22:33:25,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:33:25,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:33:25,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:33:25,939 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 22:33:25,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:33:25,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757509822] [2022-11-25 22:33:25,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757509822] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:33:25,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:33:25,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 22:33:25,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500305075] [2022-11-25 22:33:25,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:33:25,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 22:33:25,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:33:25,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 22:33:25,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:33:25,943 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand has 7 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 22:33:26,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:33:26,158 INFO L93 Difference]: Finished difference Result 100 states and 109 transitions. [2022-11-25 22:33:26,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 22:33:26,159 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2022-11-25 22:33:26,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:33:26,160 INFO L225 Difference]: With dead ends: 100 [2022-11-25 22:33:26,160 INFO L226 Difference]: Without dead ends: 100 [2022-11-25 22:33:26,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-25 22:33:26,161 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 109 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:33:26,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 166 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:33:26,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-25 22:33:26,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 80. [2022-11-25 22:33:26,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 50 states have (on average 1.66) internal successors, (83), 74 states have internal predecessors, (83), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 22:33:26,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2022-11-25 22:33:26,166 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 25 [2022-11-25 22:33:26,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:33:26,166 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2022-11-25 22:33:26,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 22:33:26,167 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2022-11-25 22:33:26,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-25 22:33:26,167 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:33:26,168 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:33:26,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-25 22:33:26,168 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-25 22:33:26,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:33:26,168 INFO L85 PathProgramCache]: Analyzing trace with hash -84123338, now seen corresponding path program 1 times [2022-11-25 22:33:26,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:33:26,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859784493] [2022-11-25 22:33:26,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:33:26,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:33:26,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:33:26,437 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 22:33:26,437 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:33:26,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859784493] [2022-11-25 22:33:26,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859784493] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:33:26,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:33:26,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 22:33:26,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090360280] [2022-11-25 22:33:26,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:33:26,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 22:33:26,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:33:26,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 22:33:26,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:33:26,441 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand has 7 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 22:33:26,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:33:26,659 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2022-11-25 22:33:26,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 22:33:26,660 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2022-11-25 22:33:26,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:33:26,661 INFO L225 Difference]: With dead ends: 79 [2022-11-25 22:33:26,661 INFO L226 Difference]: Without dead ends: 79 [2022-11-25 22:33:26,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-25 22:33:26,662 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 109 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:33:26,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 164 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:33:26,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-25 22:33:26,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-11-25 22:33:26,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 50 states have (on average 1.64) internal successors, (82), 73 states have internal predecessors, (82), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 22:33:26,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2022-11-25 22:33:26,666 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 25 [2022-11-25 22:33:26,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:33:26,667 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2022-11-25 22:33:26,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 22:33:26,667 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2022-11-25 22:33:26,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-25 22:33:26,668 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:33:26,668 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:33:26,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-25 22:33:26,668 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-25 22:33:26,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:33:26,669 INFO L85 PathProgramCache]: Analyzing trace with hash 2147382811, now seen corresponding path program 1 times [2022-11-25 22:33:26,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:33:26,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228446616] [2022-11-25 22:33:26,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:33:26,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:33:26,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:33:26,867 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 22:33:26,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:33:26,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228446616] [2022-11-25 22:33:26,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228446616] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:33:26,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:33:26,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 22:33:26,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74249049] [2022-11-25 22:33:26,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:33:26,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 22:33:26,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:33:26,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 22:33:26,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-25 22:33:26,870 INFO L87 Difference]: Start difference. First operand 79 states and 88 transitions. Second operand has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 22:33:27,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:33:27,273 INFO L93 Difference]: Finished difference Result 139 states and 153 transitions. [2022-11-25 22:33:27,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 22:33:27,274 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2022-11-25 22:33:27,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:33:27,275 INFO L225 Difference]: With dead ends: 139 [2022-11-25 22:33:27,275 INFO L226 Difference]: Without dead ends: 139 [2022-11-25 22:33:27,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-25 22:33:27,276 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 210 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:33:27,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 275 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 22:33:27,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-11-25 22:33:27,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 82. [2022-11-25 22:33:27,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 53 states have (on average 1.6603773584905661) internal successors, (88), 76 states have internal predecessors, (88), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 22:33:27,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 94 transitions. [2022-11-25 22:33:27,290 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 94 transitions. Word has length 28 [2022-11-25 22:33:27,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:33:27,290 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 94 transitions. [2022-11-25 22:33:27,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 22:33:27,291 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 94 transitions. [2022-11-25 22:33:27,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-25 22:33:27,292 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:33:27,292 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:33:27,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-25 22:33:27,293 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-25 22:33:27,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:33:27,293 INFO L85 PathProgramCache]: Analyzing trace with hash 2147382812, now seen corresponding path program 1 times [2022-11-25 22:33:27,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:33:27,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119543102] [2022-11-25 22:33:27,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:33:27,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:33:27,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:33:27,702 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 22:33:27,702 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:33:27,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119543102] [2022-11-25 22:33:27,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119543102] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:33:27,702 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:33:27,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 22:33:27,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210345186] [2022-11-25 22:33:27,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:33:27,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 22:33:27,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:33:27,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 22:33:27,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-25 22:33:27,705 INFO L87 Difference]: Start difference. First operand 82 states and 94 transitions. Second operand has 9 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 22:33:28,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:33:28,071 INFO L93 Difference]: Finished difference Result 117 states and 131 transitions. [2022-11-25 22:33:28,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 22:33:28,072 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2022-11-25 22:33:28,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:33:28,073 INFO L225 Difference]: With dead ends: 117 [2022-11-25 22:33:28,073 INFO L226 Difference]: Without dead ends: 117 [2022-11-25 22:33:28,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-25 22:33:28,074 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 208 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:33:28,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 295 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 22:33:28,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-11-25 22:33:28,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 82. [2022-11-25 22:33:28,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 53 states have (on average 1.6226415094339623) internal successors, (86), 76 states have internal predecessors, (86), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 22:33:28,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 92 transitions. [2022-11-25 22:33:28,080 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 92 transitions. Word has length 28 [2022-11-25 22:33:28,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:33:28,080 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 92 transitions. [2022-11-25 22:33:28,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 22:33:28,081 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 92 transitions. [2022-11-25 22:33:28,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-25 22:33:28,082 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:33:28,082 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:33:28,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-25 22:33:28,082 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-25 22:33:28,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:33:28,083 INFO L85 PathProgramCache]: Analyzing trace with hash -2145872880, now seen corresponding path program 1 times [2022-11-25 22:33:28,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:33:28,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427696597] [2022-11-25 22:33:28,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:33:28,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:33:28,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:33:28,172 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-25 22:33:28,173 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:33:28,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427696597] [2022-11-25 22:33:28,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427696597] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:33:28,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:33:28,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 22:33:28,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714160940] [2022-11-25 22:33:28,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:33:28,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:33:28,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:33:28,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:33:28,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:33:28,176 INFO L87 Difference]: Start difference. First operand 82 states and 92 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 22:33:28,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:33:28,241 INFO L93 Difference]: Finished difference Result 104 states and 117 transitions. [2022-11-25 22:33:28,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:33:28,242 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2022-11-25 22:33:28,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:33:28,244 INFO L225 Difference]: With dead ends: 104 [2022-11-25 22:33:28,244 INFO L226 Difference]: Without dead ends: 104 [2022-11-25 22:33:28,246 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 [2022-11-25 22:33:28,247 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 93 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:33:28,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 114 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:33:28,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-11-25 22:33:28,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 84. [2022-11-25 22:33:28,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 55 states have (on average 1.6) internal successors, (88), 78 states have internal predecessors, (88), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 22:33:28,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2022-11-25 22:33:28,252 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 29 [2022-11-25 22:33:28,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:33:28,253 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2022-11-25 22:33:28,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 22:33:28,253 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2022-11-25 22:33:28,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-25 22:33:28,257 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:33:28,257 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:33:28,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-25 22:33:28,258 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-25 22:33:28,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:33:28,258 INFO L85 PathProgramCache]: Analyzing trace with hash 2050716618, now seen corresponding path program 1 times [2022-11-25 22:33:28,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:33:28,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797493015] [2022-11-25 22:33:28,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:33:28,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:33:28,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:33:28,419 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-25 22:33:28,419 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:33:28,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797493015] [2022-11-25 22:33:28,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797493015] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:33:28,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:33:28,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 22:33:28,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115499708] [2022-11-25 22:33:28,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:33:28,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 22:33:28,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:33:28,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 22:33:28,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:33:28,425 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 22:33:28,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:33:28,544 INFO L93 Difference]: Finished difference Result 101 states and 113 transitions. [2022-11-25 22:33:28,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 22:33:28,544 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2022-11-25 22:33:28,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:33:28,545 INFO L225 Difference]: With dead ends: 101 [2022-11-25 22:33:28,545 INFO L226 Difference]: Without dead ends: 101 [2022-11-25 22:33:28,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-11-25 22:33:28,546 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 145 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:33:28,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 159 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:33:28,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-11-25 22:33:28,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 87. [2022-11-25 22:33:28,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 58 states have (on average 1.5862068965517242) internal successors, (92), 81 states have internal predecessors, (92), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 22:33:28,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 98 transitions. [2022-11-25 22:33:28,551 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 98 transitions. Word has length 30 [2022-11-25 22:33:28,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:33:28,552 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 98 transitions. [2022-11-25 22:33:28,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 22:33:28,552 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 98 transitions. [2022-11-25 22:33:28,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-25 22:33:28,553 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:33:28,553 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:33:28,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-25 22:33:28,554 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-25 22:33:28,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:33:28,555 INFO L85 PathProgramCache]: Analyzing trace with hash 2050721182, now seen corresponding path program 1 times [2022-11-25 22:33:28,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:33:28,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992444292] [2022-11-25 22:33:28,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:33:28,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:33:28,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:33:29,364 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:33:29,365 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:33:29,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992444292] [2022-11-25 22:33:29,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992444292] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:33:29,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487732802] [2022-11-25 22:33:29,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:33:29,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:33:29,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:33:29,368 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:33:29,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 22:33:29,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:33:29,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-25 22:33:29,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:33:29,634 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 [2022-11-25 22:33:29,725 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 22:33:29,726 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 [2022-11-25 22:33:29,800 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 [2022-11-25 22:33:29,867 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-25 22:33:29,868 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-11-25 22:33:29,956 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-25 22:33:29,956 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-11-25 22:33:30,004 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 0 case distinctions, treesize of input 31 treesize of output 26 [2022-11-25 22:33:30,103 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 13 [2022-11-25 22:33:30,109 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:33:30,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:33:30,171 INFO L321 Elim1Store]: treesize reduction 5, result has 66.7 percent of original size [2022-11-25 22:33:30,171 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 19 treesize of output 18 [2022-11-25 22:33:30,260 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1102 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| v_ArrVal_1102) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (forall ((v_ArrVal_1102 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| v_ArrVal_1102) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)))) is different from false [2022-11-25 22:33:30,277 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:33:30,277 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 19 treesize of output 20 [2022-11-25 22:33:30,282 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 33 treesize of output 25 [2022-11-25 22:33:30,286 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 6 treesize of output 4 [2022-11-25 22:33:30,295 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:33:30,295 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-11-25 22:33:30,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:30,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-11-25 22:33:30,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487732802] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:33:30,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [619719497] [2022-11-25 22:33:30,408 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-25 22:33:30,408 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:33:30,409 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:33:30,409 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:33:30,409 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:33:30,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 22:33:30,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 22:33:30,452 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 [2022-11-25 22:33:30,458 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 15 treesize of output 1 [2022-11-25 22:33:30,464 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 [2022-11-25 22:33:30,475 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 19 treesize of output 1 [2022-11-25 22:33:30,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:30,481 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 21 treesize of output 20 [2022-11-25 22:33:30,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:30,490 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 21 treesize of output 20 [2022-11-25 22:33:30,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:30,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:30,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-25 22:33:30,522 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 [2022-11-25 22:33:30,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:30,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:30,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-25 22:33:30,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 198 [2022-11-25 22:33:30,934 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 13 treesize of output 9 [2022-11-25 22:33:30,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:30,948 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 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-25 22:33:30,958 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 5 treesize of output 3 [2022-11-25 22:33:30,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:30,971 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 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-25 22:33:30,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-25 22:33:30,995 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:33:30,998 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:33:31,001 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:33:31,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 198 [2022-11-25 22:33:31,254 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 5 treesize of output 3 [2022-11-25 22:33:31,267 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:33:31,282 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:33:31,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 22:33:31,305 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 5 treesize of output 3 [2022-11-25 22:33:31,319 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:33:31,322 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:33:31,326 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:33:31,454 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:31,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:31,457 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 248 treesize of output 232 [2022-11-25 22:33:31,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:31,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:31,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:31,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:31,477 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 246 treesize of output 233 [2022-11-25 22:33:31,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:31,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:31,496 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:31,498 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 240 treesize of output 227 [2022-11-25 22:33:31,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:31,612 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 230 treesize of output 208 [2022-11-25 22:33:31,627 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:31,643 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-25 22:33:31,644 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 1 case distinctions, treesize of input 231 treesize of output 227 [2022-11-25 22:33:31,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:31,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:31,687 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-25 22:33:31,688 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 1 case distinctions, treesize of input 231 treesize of output 231 [2022-11-25 22:33:31,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:31,833 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 230 treesize of output 208 [2022-11-25 22:33:31,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:31,865 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-25 22:33:31,865 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 1 case distinctions, treesize of input 231 treesize of output 227 [2022-11-25 22:33:31,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:31,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:31,902 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-25 22:33:31,903 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 1 case distinctions, treesize of input 231 treesize of output 231 [2022-11-25 22:33:32,108 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 [2022-11-25 22:33:32,117 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 [2022-11-25 22:33:32,133 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 [2022-11-25 22:33:32,168 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 19 treesize of output 1 [2022-11-25 22:33:32,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:32,191 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 21 treesize of output 20 [2022-11-25 22:33:32,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:32,208 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 21 treesize of output 20 [2022-11-25 22:33:32,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 198 [2022-11-25 22:33:32,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:32,565 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 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-25 22:33:32,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:32,580 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 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-25 22:33:32,592 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 13 treesize of output 9 [2022-11-25 22:33:32,602 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 5 treesize of output 3 [2022-11-25 22:33:32,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-25 22:33:32,625 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:33:32,653 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:33:32,656 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:33:32,658 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:33:32,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 198 [2022-11-25 22:33:32,837 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:33:32,849 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 5 treesize of output 3 [2022-11-25 22:33:32,860 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 5 treesize of output 3 [2022-11-25 22:33:32,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 22:33:32,881 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:33:32,895 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:33:32,897 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:33:32,900 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:33:32,974 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 [2022-11-25 22:33:32,983 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 [2022-11-25 22:33:32,992 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 [2022-11-25 22:33:33,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 198 [2022-11-25 22:33:33,106 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 80 for LOIs [2022-11-25 22:33:33,487 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:33:43,095 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3755#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 0 |ULTIMATE.start_dll_circular_update_at_#in~head#1.offset|) (<= 1 |ULTIMATE.start_dll_circular_update_at_#in~index#1|) (<= 2 |ULTIMATE.start_dll_circular_create_#in~len#1|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (<= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~data#1| 1) (<= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (not (= (select |#valid| |ULTIMATE.start_dll_circular_update_at_~head#1.base|) 1)) (<= |ULTIMATE.start_dll_circular_update_at_#in~head#1.offset| 0) (<= 3 |ULTIMATE.start_dll_circular_update_at_#in~data#1|) (<= |ULTIMATE.start_dll_circular_update_at_~index#1| 0) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 1 |ULTIMATE.start_dll_circular_create_#in~data#1|) (<= 3 |ULTIMATE.start_dll_circular_update_at_~data#1|) (<= |ULTIMATE.start_dll_circular_update_at_#in~data#1| 3) (= |ULTIMATE.start_main_~len~0#1| 2) (<= 0 |ULTIMATE.start_dll_circular_update_at_~index#1|) (<= 0 |ULTIMATE.start_dll_circular_create_#res#1.offset|) (= |#NULL.offset| 0) (<= 3 |ULTIMATE.start_main_~new_data~0#1|) (<= |ULTIMATE.start_dll_circular_update_at_#in~index#1| 1) (<= 1 |ULTIMATE.start_dll_circular_create_~data#1|) (<= |ULTIMATE.start_dll_circular_create_#res#1.offset| 0) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 2) (<= |ULTIMATE.start_main_~i~0#1| 1) (<= |ULTIMATE.start_main_~new_data~0#1| 3) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= |ULTIMATE.start_dll_circular_create_~data#1| 1) (<= |ULTIMATE.start_dll_circular_update_at_~data#1| 3) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-25 22:33:43,095 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:33:43,096 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:33:43,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 26 [2022-11-25 22:33:43,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4209219] [2022-11-25 22:33:43,096 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:33:43,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-25 22:33:43,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:33:43,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-25 22:33:43,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=2287, Unknown=1, NotChecked=96, Total=2550 [2022-11-25 22:33:43,099 INFO L87 Difference]: Start difference. First operand 87 states and 98 transitions. Second operand has 27 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 22:33:44,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:33:44,376 INFO L93 Difference]: Finished difference Result 151 states and 168 transitions. [2022-11-25 22:33:44,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 22:33:44,377 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-11-25 22:33:44,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:33:44,378 INFO L225 Difference]: With dead ends: 151 [2022-11-25 22:33:44,378 INFO L226 Difference]: Without dead ends: 151 [2022-11-25 22:33:44,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=255, Invalid=3170, Unknown=1, NotChecked=114, Total=3540 [2022-11-25 22:33:44,380 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 164 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 22:33:44,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 621 Invalid, 999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 980 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 22:33:44,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-11-25 22:33:44,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 93. [2022-11-25 22:33:44,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 64 states have (on average 1.5625) internal successors, (100), 87 states have internal predecessors, (100), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 22:33:44,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 106 transitions. [2022-11-25 22:33:44,385 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 106 transitions. Word has length 30 [2022-11-25 22:33:44,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:33:44,386 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 106 transitions. [2022-11-25 22:33:44,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 22:33:44,386 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 106 transitions. [2022-11-25 22:33:44,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-25 22:33:44,387 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:33:44,387 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:33:44,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 22:33:44,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-25 22:33:44,588 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-25 22:33:44,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:33:44,588 INFO L85 PathProgramCache]: Analyzing trace with hash 2050721183, now seen corresponding path program 1 times [2022-11-25 22:33:44,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:33:44,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234989179] [2022-11-25 22:33:44,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:33:44,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:33:44,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:33:45,917 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:33:45,918 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:33:45,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234989179] [2022-11-25 22:33:45,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234989179] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:33:45,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394137865] [2022-11-25 22:33:45,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:33:45,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:33:45,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:33:45,920 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:33:45,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 22:33:46,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:33:46,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 85 conjunts are in the unsatisfiable core [2022-11-25 22:33:46,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:33:46,177 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 [2022-11-25 22:33:46,182 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 [2022-11-25 22:33:46,532 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 22:33:46,532 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 [2022-11-25 22:33:46,548 WARN L837 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.base|)) (= 0 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.offset| 0) (or (<= 12 (select |c_#length| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) (exists ((|v_#length_BEFORE_CALL_80| (Array Int Int))) (let ((.cse0 (@diff |v_#length_BEFORE_CALL_80| |c_#length|))) (and (= (store |v_#length_BEFORE_CALL_80| .cse0 (select |c_#length| .cse0)) |c_#length|) (<= 12 (select |v_#length_BEFORE_CALL_80| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) (= .cse0 |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.base|))))) (<= |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|)) is different from false [2022-11-25 22:33:46,551 WARN L859 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.base|)) (= 0 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.offset| 0) (or (<= 12 (select |c_#length| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) (exists ((|v_#length_BEFORE_CALL_80| (Array Int Int))) (let ((.cse0 (@diff |v_#length_BEFORE_CALL_80| |c_#length|))) (and (= (store |v_#length_BEFORE_CALL_80| .cse0 (select |c_#length| .cse0)) |c_#length|) (<= 12 (select |v_#length_BEFORE_CALL_80| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) (= .cse0 |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.base|))))) (<= |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|)) is different from true [2022-11-25 22:33:46,673 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 [2022-11-25 22:33:46,682 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 [2022-11-25 22:33:46,810 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-25 22:33:46,811 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 42 [2022-11-25 22:33:46,820 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 [2022-11-25 22:33:47,020 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-25 22:33:47,021 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2022-11-25 22:33:47,026 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 [2022-11-25 22:33:47,110 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 [2022-11-25 22:33:47,117 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 29 treesize of output 24 [2022-11-25 22:33:47,275 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 15 treesize of output 7 [2022-11-25 22:33:47,281 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 13 [2022-11-25 22:33:47,337 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:33:47,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:33:48,048 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:33:48,048 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 23 treesize of output 24 [2022-11-25 22:33:48,052 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 68 treesize of output 60 [2022-11-25 22:33:48,059 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 28 treesize of output 26 [2022-11-25 22:33:48,063 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 [2022-11-25 22:33:48,101 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:33:48,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 44 [2022-11-25 22:33:48,111 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:33:48,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 36 [2022-11-25 22:33:48,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:48,116 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:48,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2022-11-25 22:33:48,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:48,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:48,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-11-25 22:34:00,590 WARN L233 SmtUtils]: Spent 12.09s on a formula simplification. DAG size of input: 35 DAG size of output: 32 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:34:00,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394137865] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:34:00,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1564238643] [2022-11-25 22:34:00,593 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-25 22:34:00,595 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:34:00,596 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:34:00,596 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:34:00,597 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:34:00,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 22:34:00,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 22:34:00,637 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 [2022-11-25 22:34:00,641 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 [2022-11-25 22:34:00,646 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 15 treesize of output 1 [2022-11-25 22:34:00,656 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 19 treesize of output 1 [2022-11-25 22:34:00,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:00,664 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 21 treesize of output 20 [2022-11-25 22:34:00,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:00,673 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 21 treesize of output 20 [2022-11-25 22:34:00,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:00,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:00,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-25 22:34:00,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:00,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:00,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-25 22:34:00,705 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 [2022-11-25 22:34:00,864 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 5 treesize of output 3 [2022-11-25 22:34:00,875 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 5 treesize of output 3 [2022-11-25 22:34:00,888 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:34:00,903 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:34:00,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 22:34:00,972 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 5 treesize of output 3 [2022-11-25 22:34:00,982 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 5 treesize of output 3 [2022-11-25 22:34:00,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 22:34:01,005 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:34:01,023 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:34:01,085 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 23 treesize of output 11 [2022-11-25 22:34:01,100 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 21 [2022-11-25 22:34:01,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-25 22:34:01,147 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:34:01,164 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 22:34:01,164 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 1 case distinctions, treesize of input 28 treesize of output 34 [2022-11-25 22:34:01,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:01,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-25 22:34:01,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:34:01,215 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 22:34:01,215 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 1 case distinctions, treesize of input 28 treesize of output 30 [2022-11-25 22:34:01,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:34:01,282 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 22:34:01,282 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 1 case distinctions, treesize of input 28 treesize of output 30 [2022-11-25 22:34:01,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:01,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-25 22:34:01,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:01,317 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:34:01,334 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 22:34:01,335 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 1 case distinctions, treesize of input 28 treesize of output 34 [2022-11-25 22:34:01,400 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 [2022-11-25 22:34:01,408 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 [2022-11-25 22:34:01,417 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 [2022-11-25 22:34:01,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:01,451 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 21 treesize of output 20 [2022-11-25 22:34:01,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:01,469 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 21 treesize of output 20 [2022-11-25 22:34:01,480 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 19 treesize of output 1 [2022-11-25 22:34:01,677 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:34:01,709 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 5 treesize of output 3 [2022-11-25 22:34:01,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 22:34:01,729 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:34:01,742 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 5 treesize of output 3 [2022-11-25 22:34:01,792 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:34:01,808 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:34:01,820 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 5 treesize of output 3 [2022-11-25 22:34:01,829 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 5 treesize of output 3 [2022-11-25 22:34:01,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 22:34:01,939 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 [2022-11-25 22:34:01,947 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 [2022-11-25 22:34:01,955 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 [2022-11-25 22:34:01,985 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 80 for LOIs [2022-11-25 22:34:02,336 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:34:13,238 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4210#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (or (not (<= 0 (+ 8 |ULTIMATE.start_dll_circular_update_at_~head#1.offset|))) (not (<= (+ 12 |ULTIMATE.start_dll_circular_update_at_~head#1.offset|) (select |#length| |ULTIMATE.start_dll_circular_update_at_~head#1.base|)))) (<= 0 |ULTIMATE.start_dll_circular_update_at_#in~head#1.offset|) (<= |ULTIMATE.start_main_~data~0#1| 1) (<= 0 |#NULL.base|) (<= 2 |ULTIMATE.start_main_~len~0#1|) (<= 1 |ULTIMATE.start_dll_circular_update_at_#in~index#1|) (<= 2 |ULTIMATE.start_dll_circular_create_#in~len#1|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (<= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~data#1| 1) (<= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (<= |ULTIMATE.start_dll_circular_update_at_#in~head#1.offset| 0) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~len~0#1| 2) (<= 3 |ULTIMATE.start_dll_circular_update_at_#in~data#1|) (<= |ULTIMATE.start_dll_circular_update_at_~index#1| 0) (<= 1 |ULTIMATE.start_dll_circular_create_#in~data#1|) (<= 3 |ULTIMATE.start_dll_circular_update_at_~data#1|) (<= |ULTIMATE.start_dll_circular_update_at_#in~data#1| 3) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_dll_circular_update_at_~index#1|) (<= 0 |ULTIMATE.start_dll_circular_create_#res#1.offset|) (<= 3 |ULTIMATE.start_main_~new_data~0#1|) (<= |ULTIMATE.start_dll_circular_update_at_#in~index#1| 1) (<= 1 |ULTIMATE.start_dll_circular_create_~data#1|) (<= |ULTIMATE.start_dll_circular_create_#res#1.offset| 0) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 2) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~i~0#1| 1) (<= 1 |ULTIMATE.start_main_~data~0#1|) (<= |ULTIMATE.start_main_~new_data~0#1| 3) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= |ULTIMATE.start_dll_circular_create_~data#1| 1) (<= |ULTIMATE.start_dll_circular_update_at_~data#1| 3) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_create_~head~0#1.offset|))' at error location [2022-11-25 22:34:13,238 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:34:13,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:34:13,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 31 [2022-11-25 22:34:13,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298128918] [2022-11-25 22:34:13,239 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:34:13,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-25 22:34:13,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:34:13,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-25 22:34:13,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=3568, Unknown=7, NotChecked=120, Total=3906 [2022-11-25 22:34:13,243 INFO L87 Difference]: Start difference. First operand 93 states and 106 transitions. Second operand has 32 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 states have internal predecessors, (46), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-25 22:34:13,784 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#length| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|))) (and (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.base|)) (= .cse0 12) (= 0 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.offset| 0) (or (<= 12 .cse0) (exists ((|v_#length_BEFORE_CALL_80| (Array Int Int))) (let ((.cse1 (@diff |v_#length_BEFORE_CALL_80| |c_#length|))) (and (= (store |v_#length_BEFORE_CALL_80| .cse1 (select |c_#length| .cse1)) |c_#length|) (<= 12 (select |v_#length_BEFORE_CALL_80| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) (= .cse1 |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.base|))))) (<= |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))) is different from false [2022-11-25 22:34:13,787 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#length| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|))) (and (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.base|)) (= .cse0 12) (= 0 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.offset| 0) (or (<= 12 .cse0) (exists ((|v_#length_BEFORE_CALL_80| (Array Int Int))) (let ((.cse1 (@diff |v_#length_BEFORE_CALL_80| |c_#length|))) (and (= (store |v_#length_BEFORE_CALL_80| .cse1 (select |c_#length| .cse1)) |c_#length|) (<= 12 (select |v_#length_BEFORE_CALL_80| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) (= .cse1 |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.base|))))) (<= |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))) is different from true [2022-11-25 22:34:16,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:34:16,221 INFO L93 Difference]: Finished difference Result 181 states and 205 transitions. [2022-11-25 22:34:16,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 22:34:16,222 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 states have internal predecessors, (46), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2022-11-25 22:34:16,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:34:16,224 INFO L225 Difference]: With dead ends: 181 [2022-11-25 22:34:16,224 INFO L226 Difference]: Without dead ends: 181 [2022-11-25 22:34:16,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 26.2s TimeCoverageRelationStatistics Valid=360, Invalid=4895, Unknown=9, NotChecked=286, Total=5550 [2022-11-25 22:34:16,226 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 862 mSDsluCounter, 1115 mSDsCounter, 0 mSdLazyCounter, 1723 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 862 SdHoareTripleChecker+Valid, 1178 SdHoareTripleChecker+Invalid, 1888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-25 22:34:16,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [862 Valid, 1178 Invalid, 1888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1723 Invalid, 0 Unknown, 130 Unchecked, 1.5s Time] [2022-11-25 22:34:16,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-11-25 22:34:16,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 99. [2022-11-25 22:34:16,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 70 states have (on average 1.5714285714285714) internal successors, (110), 93 states have internal predecessors, (110), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 22:34:16,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 116 transitions. [2022-11-25 22:34:16,232 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 116 transitions. Word has length 30 [2022-11-25 22:34:16,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:34:16,233 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 116 transitions. [2022-11-25 22:34:16,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 states have internal predecessors, (46), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-25 22:34:16,233 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 116 transitions. [2022-11-25 22:34:16,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-25 22:34:16,234 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:34:16,234 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:34:16,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 22:34:16,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-25 22:34:16,441 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-25 22:34:16,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:34:16,442 INFO L85 PathProgramCache]: Analyzing trace with hash -738873688, now seen corresponding path program 1 times [2022-11-25 22:34:16,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:34:16,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285816818] [2022-11-25 22:34:16,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:34:16,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:34:16,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:34:16,590 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-25 22:34:16,590 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:34:16,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285816818] [2022-11-25 22:34:16,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285816818] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:34:16,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:34:16,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 22:34:16,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631670717] [2022-11-25 22:34:16,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:34:16,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 22:34:16,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:34:16,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 22:34:16,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:34:16,593 INFO L87 Difference]: Start difference. First operand 99 states and 116 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 22:34:16,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:34:16,677 INFO L93 Difference]: Finished difference Result 113 states and 129 transitions. [2022-11-25 22:34:16,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 22:34:16,678 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2022-11-25 22:34:16,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:34:16,679 INFO L225 Difference]: With dead ends: 113 [2022-11-25 22:34:16,679 INFO L226 Difference]: Without dead ends: 113 [2022-11-25 22:34:16,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:34:16,680 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 86 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:34:16,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 170 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:34:16,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-11-25 22:34:16,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 99. [2022-11-25 22:34:16,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 70 states have (on average 1.542857142857143) internal successors, (108), 93 states have internal predecessors, (108), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 22:34:16,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 114 transitions. [2022-11-25 22:34:16,686 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 114 transitions. Word has length 32 [2022-11-25 22:34:16,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:34:16,686 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 114 transitions. [2022-11-25 22:34:16,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 22:34:16,687 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 114 transitions. [2022-11-25 22:34:16,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-25 22:34:16,687 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:34:16,688 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:34:16,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-25 22:34:16,688 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-25 22:34:16,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:34:16,689 INFO L85 PathProgramCache]: Analyzing trace with hash -480556847, now seen corresponding path program 1 times [2022-11-25 22:34:16,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:34:16,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395468999] [2022-11-25 22:34:16,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:34:16,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:34:16,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:34:16,798 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 22:34:16,798 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:34:16,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395468999] [2022-11-25 22:34:16,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395468999] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:34:16,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004664227] [2022-11-25 22:34:16,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:34:16,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:34:16,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:34:16,804 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:34:16,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 22:34:17,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:34:17,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 22:34:17,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:34:17,090 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:34:17,091 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:34:17,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004664227] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:34:17,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:34:17,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-11-25 22:34:17,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694040830] [2022-11-25 22:34:17,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:34:17,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:34:17,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:34:17,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:34:17,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:34:17,094 INFO L87 Difference]: Start difference. First operand 99 states and 114 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 22:34:17,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:34:17,135 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2022-11-25 22:34:17,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:34:17,136 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2022-11-25 22:34:17,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:34:17,137 INFO L225 Difference]: With dead ends: 76 [2022-11-25 22:34:17,137 INFO L226 Difference]: Without dead ends: 76 [2022-11-25 22:34:17,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:34:17,138 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 100 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 60 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 [2022-11-25 22:34:17,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 60 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:34:17,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-25 22:34:17,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2022-11-25 22:34:17,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 53 states have (on average 1.5849056603773586) internal successors, (84), 72 states have internal predecessors, (84), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:34:17,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 88 transitions. [2022-11-25 22:34:17,143 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 88 transitions. Word has length 34 [2022-11-25 22:34:17,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:34:17,143 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 88 transitions. [2022-11-25 22:34:17,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 22:34:17,143 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 88 transitions. [2022-11-25 22:34:17,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-25 22:34:17,144 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:34:17,144 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:34:17,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 22:34:17,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:34:17,352 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-25 22:34:17,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:34:17,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1192115415, now seen corresponding path program 1 times [2022-11-25 22:34:17,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:34:17,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346949319] [2022-11-25 22:34:17,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:34:17,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:34:17,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:34:17,489 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 22:34:17,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:34:17,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346949319] [2022-11-25 22:34:17,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346949319] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:34:17,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977163804] [2022-11-25 22:34:17,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:34:17,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:34:17,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:34:17,492 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:34:17,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 22:34:17,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:34:17,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 22:34:17,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:34:17,818 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 22:34:17,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:34:17,881 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 22:34:17,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977163804] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:34:17,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [787650260] [2022-11-25 22:34:17,884 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-25 22:34:17,885 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:34:17,885 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:34:17,885 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:34:17,886 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:34:17,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 22:34:17,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 22:34:17,923 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 [2022-11-25 22:34:17,929 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 15 treesize of output 1 [2022-11-25 22:34:17,934 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 [2022-11-25 22:34:17,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:17,958 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 21 treesize of output 20 [2022-11-25 22:34:17,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:17,967 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 21 treesize of output 20 [2022-11-25 22:34:17,973 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 19 treesize of output 1 [2022-11-25 22:34:17,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:17,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:17,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-25 22:34:17,994 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 [2022-11-25 22:34:18,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:18,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:18,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-25 22:34:18,126 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:34:18,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 22:34:18,149 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 5 treesize of output 3 [2022-11-25 22:34:18,158 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 5 treesize of output 3 [2022-11-25 22:34:18,169 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:34:18,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 22:34:18,228 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 5 treesize of output 3 [2022-11-25 22:34:18,238 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:34:18,248 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 5 treesize of output 3 [2022-11-25 22:34:18,259 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:34:18,310 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 23 treesize of output 11 [2022-11-25 22:34:18,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-25 22:34:18,337 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 21 [2022-11-25 22:34:18,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:34:18,394 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 22:34:18,395 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 1 case distinctions, treesize of input 28 treesize of output 30 [2022-11-25 22:34:18,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:18,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:34:18,432 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 22:34:18,433 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 1 case distinctions, treesize of input 28 treesize of output 34 [2022-11-25 22:34:18,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:18,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-25 22:34:18,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:34:18,520 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 22:34:18,520 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 1 case distinctions, treesize of input 28 treesize of output 30 [2022-11-25 22:34:18,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:18,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:34:18,558 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 22:34:18,558 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 1 case distinctions, treesize of input 28 treesize of output 34 [2022-11-25 22:34:18,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:18,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-25 22:34:18,647 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 [2022-11-25 22:34:18,657 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 [2022-11-25 22:34:18,665 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 [2022-11-25 22:34:18,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:18,701 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 21 treesize of output 20 [2022-11-25 22:34:18,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:18,721 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 21 treesize of output 20 [2022-11-25 22:34:18,733 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 19 treesize of output 1 [2022-11-25 22:34:18,899 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 19 treesize of output 1 [2022-11-25 22:34:18,910 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 [2022-11-25 22:34:18,929 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 19 treesize of output 1 [2022-11-25 22:34:19,236 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-25 22:34:19,237 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 259 treesize of output 253 [2022-11-25 22:34:19,292 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-25 22:34:19,292 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 255 treesize of output 249 [2022-11-25 22:34:19,401 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 [2022-11-25 22:34:19,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 22:34:19,605 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:34:19,619 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 5 treesize of output 3 [2022-11-25 22:34:19,630 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:34:19,640 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 5 treesize of output 3 [2022-11-25 22:34:19,703 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:34:19,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 22:34:19,723 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 5 treesize of output 3 [2022-11-25 22:34:19,733 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 5 treesize of output 3 [2022-11-25 22:34:19,746 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:34:19,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-25 22:34:19,835 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 21 [2022-11-25 22:34:19,847 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 23 treesize of output 11 [2022-11-25 22:34:19,878 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 84 for LOIs [2022-11-25 22:34:20,211 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:34:28,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [787650260] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:34:28,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:34:28,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [5, 5, 5] total 28 [2022-11-25 22:34:28,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841397095] [2022-11-25 22:34:28,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:34:28,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-25 22:34:28,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:34:28,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-25 22:34:28,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=624, Unknown=3, NotChecked=0, Total=756 [2022-11-25 22:34:28,887 INFO L87 Difference]: Start difference. First operand 76 states and 88 transitions. Second operand has 23 states, 20 states have (on average 1.25) internal successors, (25), 19 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:34:33,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:34:33,530 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2022-11-25 22:34:33,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-25 22:34:33,531 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 1.25) internal successors, (25), 19 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 34 [2022-11-25 22:34:33,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:34:33,532 INFO L225 Difference]: With dead ends: 80 [2022-11-25 22:34:33,532 INFO L226 Difference]: Without dead ends: 80 [2022-11-25 22:34:33,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=199, Invalid=917, Unknown=6, NotChecked=0, Total=1122 [2022-11-25 22:34:33,534 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 81 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 11 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-25 22:34:33,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 188 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 833 Invalid, 4 Unknown, 0 Unchecked, 2.6s Time] [2022-11-25 22:34:33,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-25 22:34:33,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2022-11-25 22:34:33,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 46 states have (on average 1.4782608695652173) internal successors, (68), 62 states have internal predecessors, (68), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:34:33,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 72 transitions. [2022-11-25 22:34:33,538 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 72 transitions. Word has length 34 [2022-11-25 22:34:33,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:34:33,539 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 72 transitions. [2022-11-25 22:34:33,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 1.25) internal successors, (25), 19 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:34:33,540 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 72 transitions. [2022-11-25 22:34:33,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-25 22:34:33,540 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:34:33,541 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:34:33,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 22:34:33,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:34:33,748 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-25 22:34:33,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:34:33,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1192111781, now seen corresponding path program 1 times [2022-11-25 22:34:33,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:34:33,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980101200] [2022-11-25 22:34:33,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:34:33,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:34:33,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:34:33,864 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 22:34:33,864 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:34:33,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980101200] [2022-11-25 22:34:33,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980101200] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:34:33,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965786436] [2022-11-25 22:34:33,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:34:33,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:34:33,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:34:33,867 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:34:33,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 22:34:34,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:34:34,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 22:34:34,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:34:34,229 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 22:34:34,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:34:34,295 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 22:34:34,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965786436] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:34:34,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1326930611] [2022-11-25 22:34:34,298 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-25 22:34:34,298 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:34:34,299 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:34:34,299 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:34:34,299 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:34:34,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 22:34:34,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 22:34:34,335 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 [2022-11-25 22:34:34,341 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 [2022-11-25 22:34:34,347 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 15 treesize of output 1 [2022-11-25 22:34:34,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:34,356 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 21 treesize of output 20 [2022-11-25 22:34:34,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:34,365 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 21 treesize of output 20 [2022-11-25 22:34:34,372 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 19 treesize of output 1 [2022-11-25 22:34:34,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:34,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:34,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-25 22:34:34,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:34,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:34,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-25 22:34:34,403 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 [2022-11-25 22:34:34,523 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 5 treesize of output 3 [2022-11-25 22:34:34,536 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:34:34,548 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 5 treesize of output 3 [2022-11-25 22:34:34,560 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:34:34,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 22:34:34,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 22:34:34,635 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 5 treesize of output 3 [2022-11-25 22:34:34,646 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 5 treesize of output 3 [2022-11-25 22:34:34,657 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:34:34,669 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:34:34,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:34:34,758 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 248 treesize of output 232 [2022-11-25 22:34:34,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:34,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:34:34,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:34:34,776 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 246 treesize of output 233 [2022-11-25 22:34:34,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:34,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:34:34,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:34:34,796 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 240 treesize of output 227 [2022-11-25 22:34:34,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:34,906 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 230 treesize of output 208 [2022-11-25 22:34:34,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:34:34,938 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-25 22:34:34,939 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 1 case distinctions, treesize of input 231 treesize of output 227 [2022-11-25 22:34:34,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:34,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:34:34,977 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-25 22:34:34,978 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 1 case distinctions, treesize of input 231 treesize of output 231 [2022-11-25 22:34:35,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:35,207 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 230 treesize of output 208 [2022-11-25 22:34:35,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:34:35,242 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-25 22:34:35,243 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 1 case distinctions, treesize of input 231 treesize of output 231 [2022-11-25 22:34:35,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:34:35,272 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-25 22:34:35,273 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 1 case distinctions, treesize of input 219 treesize of output 215 [2022-11-25 22:34:35,409 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 [2022-11-25 22:34:35,418 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 15 treesize of output 1 [2022-11-25 22:34:35,430 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 [2022-11-25 22:34:35,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:35,462 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 21 treesize of output 20 [2022-11-25 22:34:35,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-25 22:34:35,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:35,495 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 21 treesize of output 20 [2022-11-25 22:34:35,632 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 19 treesize of output 1 [2022-11-25 22:34:35,645 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 19 treesize of output 1 [2022-11-25 22:34:35,658 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 [2022-11-25 22:34:35,957 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-25 22:34:35,957 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 257 treesize of output 251 [2022-11-25 22:34:36,006 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-25 22:34:36,007 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 253 treesize of output 247 [2022-11-25 22:34:36,182 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 [2022-11-25 22:34:36,353 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 5 treesize of output 3 [2022-11-25 22:34:36,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 22:34:36,379 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 5 treesize of output 3 [2022-11-25 22:34:36,390 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:34:36,401 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:34:36,452 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 5 treesize of output 3 [2022-11-25 22:34:36,464 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:34:36,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 22:34:36,489 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:34:36,500 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 5 treesize of output 3 [2022-11-25 22:34:36,567 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 [2022-11-25 22:34:36,575 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 [2022-11-25 22:34:36,584 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 [2022-11-25 22:34:36,610 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 84 for LOIs [2022-11-25 22:34:36,988 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:34:46,240 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5601#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (= |ULTIMATE.start_dll_circular_get_data_at_#in~index#1| |ULTIMATE.start_dll_circular_get_data_at_~index#1|) (<= 2 |ULTIMATE.start_dll_circular_create_#in~len#1|) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (<= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~data#1| 1) (<= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= (+ |ULTIMATE.start_main_~len~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~expected~0#1|) (not (= (select |#valid| |ULTIMATE.start_dll_circular_get_data_at_~head#1.base|) 1)) (= |ULTIMATE.start_main_~s~0#1.base| |ULTIMATE.start_dll_circular_get_data_at_#in~head#1.base|) (= |ULTIMATE.start_dll_circular_get_data_at_#in~head#1.offset| |ULTIMATE.start_main_~s~0#1.offset|) (= |ULTIMATE.start_dll_circular_get_data_at_#in~index#1| |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 1 |ULTIMATE.start_dll_circular_create_#in~data#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (<= 0 |ULTIMATE.start_dll_circular_create_#res#1.offset|) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_dll_circular_create_~data#1|) (<= |ULTIMATE.start_dll_circular_create_#res#1.offset| 0) (= |ULTIMATE.start_dll_circular_get_data_at_#in~head#1.offset| |ULTIMATE.start_dll_circular_get_data_at_~head#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 2) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (= |ULTIMATE.start_dll_circular_get_data_at_~head#1.base| |ULTIMATE.start_dll_circular_get_data_at_#in~head#1.base|) (<= |ULTIMATE.start_dll_circular_create_~data#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| (+ |ULTIMATE.start_main_~i~0#1| 1)) (<= 0 |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-25 22:34:46,240 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:34:46,240 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:34:46,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-11-25 22:34:46,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141190466] [2022-11-25 22:34:46,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:34:46,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 22:34:46,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:34:46,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 22:34:46,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=717, Unknown=2, NotChecked=0, Total=870 [2022-11-25 22:34:46,243 INFO L87 Difference]: Start difference. First operand 66 states and 72 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 22:34:46,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:34:46,374 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2022-11-25 22:34:46,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 22:34:46,378 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2022-11-25 22:34:46,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:34:46,379 INFO L225 Difference]: With dead ends: 79 [2022-11-25 22:34:46,379 INFO L226 Difference]: Without dead ends: 79 [2022-11-25 22:34:46,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 73 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=174, Invalid=816, Unknown=2, NotChecked=0, Total=992 [2022-11-25 22:34:46,380 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 166 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:34:46,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 135 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:34:46,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-25 22:34:46,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 73. [2022-11-25 22:34:46,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 53 states have (on average 1.528301886792453) internal successors, (81), 69 states have internal predecessors, (81), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:34:46,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2022-11-25 22:34:46,384 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 34 [2022-11-25 22:34:46,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:34:46,385 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2022-11-25 22:34:46,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 22:34:46,385 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2022-11-25 22:34:46,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-25 22:34:46,386 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:34:46,386 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:34:46,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 22:34:46,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:34:46,593 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-25 22:34:46,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:34:46,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1845824073, now seen corresponding path program 1 times [2022-11-25 22:34:46,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:34:46,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490013095] [2022-11-25 22:34:46,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:34:46,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:34:46,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:34:46,791 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 22:34:46,792 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:34:46,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490013095] [2022-11-25 22:34:46,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490013095] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:34:46,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671289090] [2022-11-25 22:34:46,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:34:46,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:34:46,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:34:46,794 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:34:46,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 22:34:47,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:34:47,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 22:34:47,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:34:47,165 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 22:34:47,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:34:47,234 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 22:34:47,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671289090] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:34:47,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [550053337] [2022-11-25 22:34:47,239 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-25 22:34:47,239 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:34:47,240 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:34:47,240 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:34:47,240 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:34:47,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 22:34:47,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 22:34:47,278 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 15 treesize of output 1 [2022-11-25 22:34:47,285 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 [2022-11-25 22:34:47,290 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 [2022-11-25 22:34:47,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:47,300 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 21 treesize of output 20 [2022-11-25 22:34:47,306 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 19 treesize of output 1 [2022-11-25 22:34:47,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:47,315 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 21 treesize of output 20 [2022-11-25 22:34:47,325 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 [2022-11-25 22:34:47,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:47,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:47,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-25 22:34:47,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:47,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:47,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-25 22:34:47,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 198 [2022-11-25 22:34:47,715 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 5 treesize of output 3 [2022-11-25 22:34:47,727 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:34:47,738 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 5 treesize of output 3 [2022-11-25 22:34:47,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 22:34:47,765 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:34:47,780 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:34:47,782 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:34:47,785 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:34:47,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 198 [2022-11-25 22:34:48,047 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 5 treesize of output 3 [2022-11-25 22:34:48,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 22:34:48,075 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:34:48,086 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 5 treesize of output 3 [2022-11-25 22:34:48,098 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:34:48,114 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:34:48,117 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:34:48,119 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:34:48,183 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 21 [2022-11-25 22:34:48,197 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 23 treesize of output 11 [2022-11-25 22:34:48,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-25 22:34:48,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:48,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-25 22:34:48,267 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:34:48,282 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 22:34:48,282 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 1 case distinctions, treesize of input 28 treesize of output 30 [2022-11-25 22:34:48,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:48,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:34:48,322 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 22:34:48,322 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 1 case distinctions, treesize of input 28 treesize of output 34 [2022-11-25 22:34:48,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:34:48,388 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 22:34:48,388 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 1 case distinctions, treesize of input 28 treesize of output 30 [2022-11-25 22:34:48,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:48,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-25 22:34:48,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:48,454 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:34:48,473 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 22:34:48,474 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 1 case distinctions, treesize of input 28 treesize of output 34 [2022-11-25 22:34:48,548 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 [2022-11-25 22:34:48,557 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 [2022-11-25 22:34:48,571 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 [2022-11-25 22:34:48,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:48,605 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 21 treesize of output 20 [2022-11-25 22:34:48,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:48,622 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 21 treesize of output 20 [2022-11-25 22:34:48,642 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 19 treesize of output 1 [2022-11-25 22:34:48,774 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 19 treesize of output 1 [2022-11-25 22:34:48,796 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 19 treesize of output 1 [2022-11-25 22:34:48,810 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 [2022-11-25 22:34:49,073 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-25 22:34:49,073 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 259 treesize of output 253 [2022-11-25 22:34:49,123 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-25 22:34:49,124 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 255 treesize of output 249 [2022-11-25 22:34:49,266 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 [2022-11-25 22:34:49,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 198 [2022-11-25 22:34:49,644 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:34:49,655 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 5 treesize of output 3 [2022-11-25 22:34:49,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 22:34:49,676 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 5 treesize of output 3 [2022-11-25 22:34:49,688 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:34:49,703 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:34:49,705 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:34:49,707 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:34:49,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 198 [2022-11-25 22:34:49,866 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:34:49,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 22:34:49,888 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 5 treesize of output 3 [2022-11-25 22:34:49,912 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:34:49,924 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 5 treesize of output 3 [2022-11-25 22:34:49,937 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:34:49,940 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:34:49,943 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:34:50,034 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 21 [2022-11-25 22:34:50,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-25 22:34:50,064 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 23 treesize of output 11 [2022-11-25 22:34:50,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 198 [2022-11-25 22:34:50,190 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 80 for LOIs [2022-11-25 22:34:50,571 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:35:00,308 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5992#(and (not (= (select |#valid| |ULTIMATE.start_dll_circular_update_at_~head#1.base|) 1)) (not (< 0 |ULTIMATE.start_dll_circular_update_at_~index#1|)) (or (and (= (select |#valid| |ULTIMATE.start_dll_circular_update_at_#in~head#1.base|) 1) (= |ULTIMATE.start_dll_circular_update_at_#in~data#1| |ULTIMATE.start_dll_circular_update_at_~data#1|) (<= 0 |ULTIMATE.start_dll_circular_update_at_#in~head#1.offset|) (= |ULTIMATE.start_dll_circular_update_at_~head#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_update_at_#in~head#1.base|) |ULTIMATE.start_dll_circular_update_at_#in~head#1.offset|)) (<= 2 |ULTIMATE.start_dll_circular_create_#in~len#1|) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (<= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~data#1| 1) (<= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (<= (+ |ULTIMATE.start_dll_circular_update_at_#in~head#1.offset| 4) (select |#length| |ULTIMATE.start_dll_circular_update_at_#in~head#1.base|)) (= |ULTIMATE.start_dll_circular_update_at_#in~index#1| (+ |ULTIMATE.start_dll_circular_update_at_~index#1| 1)) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 1 |ULTIMATE.start_dll_circular_create_#in~data#1|) (= |ULTIMATE.start_dll_circular_update_at_#in~index#1| |ULTIMATE.start_main_~i~0#1|) (= (+ |ULTIMATE.start_main_~len~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~new_data~0#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_dll_circular_update_at_#in~head#1.base| |ULTIMATE.start_main_~s~0#1.base|) (<= 0 |ULTIMATE.start_dll_circular_create_#res#1.offset|) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_dll_circular_create_~data#1|) (= |ULTIMATE.start_main_~s~0#1.offset| |ULTIMATE.start_dll_circular_update_at_#in~head#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#res#1.offset| 0) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 2) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= |ULTIMATE.start_dll_circular_create_~data#1| 1) (< 0 |ULTIMATE.start_dll_circular_update_at_#in~index#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_update_at_#in~head#1.base|) |ULTIMATE.start_dll_circular_update_at_#in~head#1.offset|) |ULTIMATE.start_dll_circular_update_at_~head#1.offset|) (<= 0 |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |ULTIMATE.start_dll_circular_update_at_#in~data#1| |ULTIMATE.start_main_~new_data~0#1|) (= |#NULL.base| 0)) (and (= |ULTIMATE.start_dll_circular_update_at_#in~data#1| |ULTIMATE.start_dll_circular_update_at_~data#1|) (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 2 |ULTIMATE.start_dll_circular_create_#in~len#1|) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (<= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~data#1| 1) (<= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (< 0 (+ |ULTIMATE.start_main_~i~0#1| 1)) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 1 |ULTIMATE.start_dll_circular_create_#in~data#1|) (= |ULTIMATE.start_dll_circular_update_at_#in~index#1| |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_dll_circular_update_at_#in~index#1| |ULTIMATE.start_dll_circular_update_at_~index#1|) (= |ULTIMATE.start_dll_circular_update_at_~head#1.base| |ULTIMATE.start_dll_circular_update_at_#in~head#1.base|) (= (+ |ULTIMATE.start_main_~len~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~new_data~0#1|) (= |ULTIMATE.start_dll_circular_update_at_#in~head#1.offset| |ULTIMATE.start_dll_circular_update_at_~head#1.offset|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_dll_circular_update_at_#in~head#1.base| |ULTIMATE.start_main_~s~0#1.base|) (<= 0 |ULTIMATE.start_dll_circular_create_#res#1.offset|) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_dll_circular_create_~data#1|) (= |ULTIMATE.start_main_~s~0#1.offset| |ULTIMATE.start_dll_circular_update_at_#in~head#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#res#1.offset| 0) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 2) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= |ULTIMATE.start_dll_circular_create_~data#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |ULTIMATE.start_dll_circular_update_at_#in~data#1| |ULTIMATE.start_main_~new_data~0#1|) (= |#NULL.base| 0))))' at error location [2022-11-25 22:35:00,308 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:35:00,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:35:00,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2022-11-25 22:35:00,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849195779] [2022-11-25 22:35:00,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:35:00,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 22:35:00,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:35:00,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 22:35:00,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2022-11-25 22:35:00,311 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 22:35:00,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:35:00,484 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2022-11-25 22:35:00,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 22:35:00,488 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2022-11-25 22:35:00,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:35:00,489 INFO L225 Difference]: With dead ends: 75 [2022-11-25 22:35:00,490 INFO L226 Difference]: Without dead ends: 75 [2022-11-25 22:35:00,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 79 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=142, Invalid=787, Unknown=1, NotChecked=0, Total=930 [2022-11-25 22:35:00,491 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 197 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:35:00,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 148 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:35:00,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-25 22:35:00,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 69. [2022-11-25 22:35:00,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 50 states have (on average 1.52) internal successors, (76), 65 states have internal predecessors, (76), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:35:00,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 80 transitions. [2022-11-25 22:35:00,495 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 80 transitions. Word has length 35 [2022-11-25 22:35:00,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:35:00,496 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 80 transitions. [2022-11-25 22:35:00,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 22:35:00,496 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 80 transitions. [2022-11-25 22:35:00,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-25 22:35:00,497 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:35:00,497 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:35:00,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 22:35:00,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-25 22:35:00,705 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-25 22:35:00,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:35:00,705 INFO L85 PathProgramCache]: Analyzing trace with hash -107385265, now seen corresponding path program 2 times [2022-11-25 22:35:00,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:35:00,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133158062] [2022-11-25 22:35:00,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:35:00,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:35:00,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:35:00,854 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 22:35:00,855 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:35:00,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133158062] [2022-11-25 22:35:00,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133158062] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:35:00,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872089821] [2022-11-25 22:35:00,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:35:00,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:35:00,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:35:00,858 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:35:00,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 22:35:01,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-25 22:35:01,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:35:01,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 22:35:01,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:35:01,173 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-25 22:35:01,173 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:35:01,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872089821] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:35:01,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:35:01,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-25 22:35:01,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944971150] [2022-11-25 22:35:01,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:35:01,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:35:01,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:35:01,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:35:01,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:35:01,176 INFO L87 Difference]: Start difference. First operand 69 states and 80 transitions. Second operand has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 22:35:01,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:35:01,272 INFO L93 Difference]: Finished difference Result 94 states and 107 transitions. [2022-11-25 22:35:01,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:35:01,273 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2022-11-25 22:35:01,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:35:01,274 INFO L225 Difference]: With dead ends: 94 [2022-11-25 22:35:01,274 INFO L226 Difference]: Without dead ends: 94 [2022-11-25 22:35:01,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:35:01,275 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 67 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:35:01,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 79 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:35:01,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-25 22:35:01,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 73. [2022-11-25 22:35:01,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 69 states have internal predecessors, (84), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:35:01,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 88 transitions. [2022-11-25 22:35:01,279 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 88 transitions. Word has length 37 [2022-11-25 22:35:01,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:35:01,280 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 88 transitions. [2022-11-25 22:35:01,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 22:35:01,280 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 88 transitions. [2022-11-25 22:35:01,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-25 22:35:01,281 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:35:01,281 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:35:01,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 22:35:01,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-25 22:35:01,484 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-25 22:35:01,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:35:01,485 INFO L85 PathProgramCache]: Analyzing trace with hash -107385264, now seen corresponding path program 1 times [2022-11-25 22:35:01,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:35:01,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316218769] [2022-11-25 22:35:01,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:35:01,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:35:01,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:35:01,973 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 22:35:01,973 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:35:01,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316218769] [2022-11-25 22:35:01,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316218769] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:35:01,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:35:01,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 22:35:01,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617418428] [2022-11-25 22:35:01,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:35:01,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 22:35:01,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:35:01,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 22:35:01,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-25 22:35:01,976 INFO L87 Difference]: Start difference. First operand 73 states and 88 transitions. Second operand has 9 states, 7 states have (on average 4.285714285714286) internal successors, (30), 8 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 22:35:02,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:35:02,269 INFO L93 Difference]: Finished difference Result 100 states and 114 transitions. [2022-11-25 22:35:02,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 22:35:02,270 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 4.285714285714286) internal successors, (30), 8 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2022-11-25 22:35:02,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:35:02,271 INFO L225 Difference]: With dead ends: 100 [2022-11-25 22:35:02,271 INFO L226 Difference]: Without dead ends: 100 [2022-11-25 22:35:02,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-25 22:35:02,272 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 240 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:35:02,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 171 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:35:02,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-25 22:35:02,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 73. [2022-11-25 22:35:02,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 54 states have (on average 1.5) internal successors, (81), 69 states have internal predecessors, (81), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:35:02,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2022-11-25 22:35:02,277 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 37 [2022-11-25 22:35:02,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:35:02,277 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2022-11-25 22:35:02,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 4.285714285714286) internal successors, (30), 8 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 22:35:02,278 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2022-11-25 22:35:02,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-25 22:35:02,279 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:35:02,279 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:35:02,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-25 22:35:02,279 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-25 22:35:02,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:35:02,280 INFO L85 PathProgramCache]: Analyzing trace with hash -117927647, now seen corresponding path program 1 times [2022-11-25 22:35:02,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:35:02,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936911628] [2022-11-25 22:35:02,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:35:02,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:35:02,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:35:03,834 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:35:03,834 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:35:03,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936911628] [2022-11-25 22:35:03,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936911628] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:35:03,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903750496] [2022-11-25 22:35:03,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:35:03,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:35:03,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:35:03,837 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:35:03,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 22:35:04,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:35:04,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-25 22:35:04,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:35:04,197 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 [2022-11-25 22:35:04,249 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 22:35:04,250 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 [2022-11-25 22:35:04,268 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 [2022-11-25 22:35:04,329 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-25 22:35:04,330 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-11-25 22:35:04,386 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-25 22:35:04,387 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-11-25 22:35:04,434 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 29 treesize of output 24 [2022-11-25 22:35:04,605 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-25 22:35:04,605 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-11-25 22:35:04,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:04,695 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 31 treesize of output 26 [2022-11-25 22:35:04,766 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 13 [2022-11-25 22:35:04,781 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 22:35:04,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:35:06,081 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2285 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_update_at_~head#1.base|) |c_ULTIMATE.start_dll_circular_update_at_~head#1.offset|) v_ArrVal_2285) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)) 1)) is different from false [2022-11-25 22:35:06,092 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2285 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) v_ArrVal_2285) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)) 1)) is different from false [2022-11-25 22:35:06,102 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2283 Int) (v_ArrVal_2285 (Array Int Int))) (= 1 (select |c_#valid| (select (select (let ((.cse0 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|))) (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (store .cse0 (+ 4 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) v_ArrVal_2283)) (select .cse0 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) v_ArrVal_2285)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|)))) is different from false [2022-11-25 22:35:06,116 INFO L321 Elim1Store]: treesize reduction 5, result has 86.8 percent of original size [2022-11-25 22:35:06,116 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 42 treesize of output 41 [2022-11-25 22:35:06,130 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2283 Int) (v_ArrVal_2285 (Array Int Int)) (v_ArrVal_2282 (Array Int Int))) (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| v_ArrVal_2282))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|))) (store (store .cse0 |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (store .cse1 (+ 4 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) v_ArrVal_2283)) (select .cse1 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) v_ArrVal_2285))) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)) is different from false [2022-11-25 22:35:06,233 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2281 (Array Int Int)) (v_ArrVal_2283 Int) (v_ArrVal_2285 (Array Int Int)) (v_ArrVal_2282 (Array Int Int))) (= (select (select (let ((.cse0 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| v_ArrVal_2281) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| v_ArrVal_2282))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|))) (store (store .cse0 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base| (store .cse1 (+ |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 4) v_ArrVal_2283)) (select .cse1 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) v_ArrVal_2285))) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)) is different from false [2022-11-25 22:35:06,246 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:35:06,247 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 66 treesize of output 51 [2022-11-25 22:35:06,253 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 140 treesize of output 124 [2022-11-25 22:35:06,259 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 120 treesize of output 112 [2022-11-25 22:35:06,266 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 58 treesize of output 52 [2022-11-25 22:35:06,270 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 106 treesize of output 94 [2022-11-25 22:35:06,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903750496] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:35:06,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [969586508] [2022-11-25 22:35:06,526 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-11-25 22:35:06,526 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:35:06,526 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:35:06,527 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:35:06,527 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:35:06,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 22:35:06,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 22:35:06,565 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 [2022-11-25 22:35:06,571 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 [2022-11-25 22:35:06,578 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 15 treesize of output 1 [2022-11-25 22:35:06,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:06,587 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 21 treesize of output 20 [2022-11-25 22:35:06,595 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 19 treesize of output 1 [2022-11-25 22:35:06,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:06,602 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 21 treesize of output 20 [2022-11-25 22:35:06,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:06,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:06,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-25 22:35:06,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:06,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:06,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-25 22:35:06,637 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 [2022-11-25 22:35:06,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 22:35:06,772 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:35:06,787 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:35:06,801 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 5 treesize of output 3 [2022-11-25 22:35:06,812 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 5 treesize of output 3 [2022-11-25 22:35:06,860 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 5 treesize of output 3 [2022-11-25 22:35:06,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 22:35:06,917 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:35:06,929 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 5 treesize of output 3 [2022-11-25 22:35:06,940 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:35:06,992 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 21 [2022-11-25 22:35:07,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-25 22:35:07,020 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 23 treesize of output 11 [2022-11-25 22:35:07,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:07,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-25 22:35:07,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:35:07,098 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 22:35:07,099 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 1 case distinctions, treesize of input 28 treesize of output 34 [2022-11-25 22:35:07,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:35:07,134 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 22:35:07,134 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 1 case distinctions, treesize of input 28 treesize of output 30 [2022-11-25 22:35:07,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:07,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-25 22:35:07,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:35:07,217 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 22:35:07,218 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 1 case distinctions, treesize of input 28 treesize of output 30 [2022-11-25 22:35:07,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:07,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:35:07,259 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 22:35:07,259 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 1 case distinctions, treesize of input 28 treesize of output 34 [2022-11-25 22:35:07,337 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 [2022-11-25 22:35:07,346 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 [2022-11-25 22:35:07,357 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 [2022-11-25 22:35:07,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:07,390 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 21 treesize of output 20 [2022-11-25 22:35:07,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-25 22:35:07,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:07,420 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 21 treesize of output 20 [2022-11-25 22:35:07,555 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 19 treesize of output 1 [2022-11-25 22:35:07,566 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 19 treesize of output 1 [2022-11-25 22:35:07,579 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 [2022-11-25 22:35:07,907 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-25 22:35:07,907 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 259 treesize of output 253 [2022-11-25 22:35:07,955 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-25 22:35:07,955 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 255 treesize of output 249 [2022-11-25 22:35:08,150 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 [2022-11-25 22:35:08,455 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:35:08,470 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:35:08,482 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 5 treesize of output 3 [2022-11-25 22:35:08,492 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 5 treesize of output 3 [2022-11-25 22:35:08,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 22:35:08,556 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 5 treesize of output 3 [2022-11-25 22:35:08,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 22:35:08,578 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 5 treesize of output 3 [2022-11-25 22:35:08,589 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:35:08,602 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:35:08,683 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 [2022-11-25 22:35:08,692 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 [2022-11-25 22:35:08,700 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 [2022-11-25 22:35:08,726 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 84 for LOIs [2022-11-25 22:35:09,060 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:35:21,765 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6856#(and (<= 2 |ULTIMATE.start_dll_circular_create_#in~len#1|) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (<= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~data#1| 1) (<= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (<= |ULTIMATE.start_dll_circular_get_data_at_~index#1| 0) (= (+ |ULTIMATE.start_main_~len~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~expected~0#1|) (not (= (select |#valid| |ULTIMATE.start_dll_circular_get_data_at_~head#1.base|) 1)) (= |ULTIMATE.start_dll_circular_get_data_at_~head#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_get_data_at_#in~head#1.base|) |ULTIMATE.start_dll_circular_get_data_at_#in~head#1.offset|)) (= |ULTIMATE.start_main_~s~0#1.base| |ULTIMATE.start_dll_circular_get_data_at_#in~head#1.base|) (= |ULTIMATE.start_dll_circular_get_data_at_#in~index#1| (+ |ULTIMATE.start_dll_circular_get_data_at_~index#1| 1)) (= |ULTIMATE.start_dll_circular_get_data_at_#in~head#1.offset| |ULTIMATE.start_main_~s~0#1.offset|) (= |ULTIMATE.start_dll_circular_get_data_at_#in~index#1| |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 1 |ULTIMATE.start_dll_circular_create_#in~data#1|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_get_data_at_#in~head#1.base|) |ULTIMATE.start_dll_circular_get_data_at_#in~head#1.offset|) |ULTIMATE.start_dll_circular_get_data_at_~head#1.offset|) (<= 0 |ULTIMATE.start_dll_circular_create_#res#1.offset|) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_dll_circular_create_~data#1|) (<= (+ |ULTIMATE.start_dll_circular_get_data_at_#in~head#1.offset| 4) (select |#length| |ULTIMATE.start_dll_circular_get_data_at_#in~head#1.base|)) (<= |ULTIMATE.start_dll_circular_create_#res#1.offset| 0) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 2) (= (select |#valid| |ULTIMATE.start_dll_circular_get_data_at_#in~head#1.base|) 1) (<= 3 |ULTIMATE.start_main_~expected~0#1|) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= 0 |ULTIMATE.start_dll_circular_get_data_at_#in~head#1.offset|) (<= |ULTIMATE.start_dll_circular_create_~data#1| 1) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~len~0#1| (+ |ULTIMATE.start_main_~i~0#1| 1)) (<= 0 |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |#NULL.base| 0) (<= |ULTIMATE.start_dll_circular_get_data_at_#in~head#1.offset| 0))' at error location [2022-11-25 22:35:21,765 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:35:21,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:35:21,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 27 [2022-11-25 22:35:21,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115005543] [2022-11-25 22:35:21,766 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:35:21,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-25 22:35:21,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:35:21,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-25 22:35:21,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=3185, Unknown=20, NotChecked=590, Total=4032 [2022-11-25 22:35:21,769 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 28 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:35:22,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:35:22,908 INFO L93 Difference]: Finished difference Result 127 states and 145 transitions. [2022-11-25 22:35:22,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-25 22:35:22,910 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2022-11-25 22:35:22,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:35:22,911 INFO L225 Difference]: With dead ends: 127 [2022-11-25 22:35:22,911 INFO L226 Difference]: Without dead ends: 127 [2022-11-25 22:35:22,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 57 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=351, Invalid=4341, Unknown=20, NotChecked=690, Total=5402 [2022-11-25 22:35:22,913 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 529 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 22:35:22,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [529 Valid, 393 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 22:35:22,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-25 22:35:22,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 79. [2022-11-25 22:35:22,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 60 states have (on average 1.55) internal successors, (93), 75 states have internal predecessors, (93), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:35:22,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 97 transitions. [2022-11-25 22:35:22,917 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 97 transitions. Word has length 39 [2022-11-25 22:35:22,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:35:22,918 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 97 transitions. [2022-11-25 22:35:22,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:35:22,919 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 97 transitions. [2022-11-25 22:35:22,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-25 22:35:22,919 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:35:22,919 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:35:22,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-25 22:35:23,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-25 22:35:23,127 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-25 22:35:23,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:35:23,127 INFO L85 PathProgramCache]: Analyzing trace with hash -117927646, now seen corresponding path program 1 times [2022-11-25 22:35:23,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:35:23,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114623763] [2022-11-25 22:35:23,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:35:23,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:35:23,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:35:25,437 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:35:25,438 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:35:25,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114623763] [2022-11-25 22:35:25,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114623763] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:35:25,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028797508] [2022-11-25 22:35:25,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:35:25,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:35:25,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:35:25,440 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:35:25,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 22:35:25,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:35:25,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 106 conjunts are in the unsatisfiable core [2022-11-25 22:35:25,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:35:25,825 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 [2022-11-25 22:35:26,074 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 22:35:26,075 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 [2022-11-25 22:35:26,236 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 [2022-11-25 22:35:26,252 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 [2022-11-25 22:35:26,351 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 [2022-11-25 22:35:26,363 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 [2022-11-25 22:35:26,541 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-25 22:35:26,542 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2022-11-25 22:35:26,546 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 [2022-11-25 22:35:26,564 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 [2022-11-25 22:35:26,571 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 29 treesize of output 24 [2022-11-25 22:35:26,802 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-25 22:35:26,802 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2022-11-25 22:35:26,811 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 18 treesize of output 20 [2022-11-25 22:35:26,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:26,929 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 31 treesize of output 26 [2022-11-25 22:35:26,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:26,941 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 21 treesize of output 20 [2022-11-25 22:35:27,042 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 13 [2022-11-25 22:35:27,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:35:27,055 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 22:35:27,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:35:27,646 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2454 (Array Int Int))) (<= 0 (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_update_at_~head#1.base| v_ArrVal_2454) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) 8))) (forall ((v_ArrVal_2455 (Array Int Int)) (v_ArrVal_2454 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_update_at_~head#1.base| v_ArrVal_2454) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) 12) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_update_at_~head#1.base| v_ArrVal_2455) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))))) is different from false [2022-11-25 22:35:27,665 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_update_at_~head#1.base|) |c_ULTIMATE.start_dll_circular_update_at_~head#1.offset|))) (and (forall ((v_ArrVal_2455 (Array Int Int)) (v_ArrVal_2454 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_2454) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) 12) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_2455) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)))) (forall ((v_ArrVal_2454 (Array Int Int))) (<= 0 (+ (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_2454) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) 8))))) is different from false [2022-11-25 22:35:27,684 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) (and (forall ((v_ArrVal_2455 (Array Int Int)) (v_ArrVal_2454 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_2454) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) 12) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_2455) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)))) (forall ((v_ArrVal_2454 (Array Int Int))) (<= 0 (+ (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_2454) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) 8))))) is different from false [2022-11-25 22:35:27,698 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse3 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|))) (let ((.cse0 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) (.cse1 (+ 4 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|)) (.cse2 (select .cse3 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))) (and (forall ((v_ArrVal_2452 Int) (v_ArrVal_2453 Int) (v_ArrVal_2455 (Array Int Int)) (v_ArrVal_2454 (Array Int Int))) (<= (+ 12 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (store .cse0 .cse1 v_ArrVal_2452)) .cse2 v_ArrVal_2454) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|)) (select |c_#length| (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (store .cse3 .cse1 v_ArrVal_2453)) .cse2 v_ArrVal_2455) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|)))) (forall ((v_ArrVal_2452 Int) (v_ArrVal_2454 (Array Int Int))) (<= 0 (+ 8 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (store .cse0 .cse1 v_ArrVal_2452)) .cse2 v_ArrVal_2454) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))))))) is different from false [2022-11-25 22:35:36,567 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:35:36,567 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 68 treesize of output 61 [2022-11-25 22:35:36,576 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 562 treesize of output 550 [2022-11-25 22:35:36,592 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:35:36,593 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 546 treesize of output 426 [2022-11-25 22:35:36,602 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 1066 treesize of output 998 [2022-11-25 22:35:36,626 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 994 treesize of output 962 [2022-11-25 22:35:36,640 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 962 treesize of output 898 [2022-11-25 22:35:36,655 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 898 treesize of output 894 [2022-11-25 22:35:36,668 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 894 treesize of output 878 [2022-11-25 22:35:36,683 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 878 treesize of output 870 [2022-11-25 22:35:37,129 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:35:37,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 126 [2022-11-25 22:35:37,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:35:37,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:35:37,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 200 treesize of output 192 [2022-11-25 22:35:37,153 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:35:37,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 188 treesize of output 132 [2022-11-25 22:35:37,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:35:37,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:35:37,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 70 [2022-11-25 22:35:37,182 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 66 treesize of output 62 [2022-11-25 22:35:37,190 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 32 treesize of output 28 [2022-11-25 22:35:49,892 WARN L233 SmtUtils]: Spent 12.07s on a formula simplification. DAG size of input: 35 DAG size of output: 32 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:35:49,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028797508] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:35:49,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [487504100] [2022-11-25 22:35:49,895 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-11-25 22:35:49,895 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:35:49,896 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:35:49,896 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:35:49,896 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:35:49,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 22:35:49,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 22:35:49,941 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 15 treesize of output 1 [2022-11-25 22:35:49,948 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 [2022-11-25 22:35:49,960 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 [2022-11-25 22:35:49,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:49,974 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 21 treesize of output 20 [2022-11-25 22:35:49,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:49,983 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 21 treesize of output 20 [2022-11-25 22:35:49,995 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 19 treesize of output 1 [2022-11-25 22:35:50,008 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 [2022-11-25 22:35:50,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:50,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:50,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-25 22:35:50,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:50,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:50,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-25 22:35:50,166 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 5 treesize of output 3 [2022-11-25 22:35:50,179 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:35:50,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 22:35:50,210 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:35:50,225 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 5 treesize of output 3 [2022-11-25 22:35:50,267 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 5 treesize of output 3 [2022-11-25 22:35:50,280 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:35:50,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 22:35:50,309 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 5 treesize of output 3 [2022-11-25 22:35:50,322 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:35:50,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:35:50,420 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 248 treesize of output 232 [2022-11-25 22:35:50,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:50,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:35:50,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:35:50,441 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 246 treesize of output 233 [2022-11-25 22:35:50,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:50,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:35:50,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:35:50,464 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 240 treesize of output 227 [2022-11-25 22:35:50,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:50,578 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 230 treesize of output 208 [2022-11-25 22:35:50,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:35:50,620 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-25 22:35:50,621 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 1 case distinctions, treesize of input 231 treesize of output 227 [2022-11-25 22:35:50,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:50,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:35:50,671 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-25 22:35:50,672 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 1 case distinctions, treesize of input 231 treesize of output 231 [2022-11-25 22:35:50,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:50,829 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 230 treesize of output 208 [2022-11-25 22:35:50,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:35:50,877 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-25 22:35:50,878 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 1 case distinctions, treesize of input 231 treesize of output 227 [2022-11-25 22:35:50,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:50,901 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:35:50,929 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-25 22:35:50,929 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 1 case distinctions, treesize of input 231 treesize of output 231 [2022-11-25 22:35:51,056 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 [2022-11-25 22:35:51,067 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 [2022-11-25 22:35:51,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 22:35:51,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:51,123 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 21 treesize of output 20 [2022-11-25 22:35:51,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:35:51,142 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 21 treesize of output 20 [2022-11-25 22:35:51,158 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 19 treesize of output 1 [2022-11-25 22:35:51,308 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 [2022-11-25 22:35:51,325 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 19 treesize of output 1 [2022-11-25 22:35:51,340 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 19 treesize of output 1 [2022-11-25 22:35:51,448 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 19 treesize of output 1 [2022-11-25 22:35:51,463 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 [2022-11-25 22:35:51,479 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 19 treesize of output 1 [2022-11-25 22:35:51,688 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:35:51,700 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:35:51,712 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 5 treesize of output 3 [2022-11-25 22:35:51,728 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 5 treesize of output 3 [2022-11-25 22:35:51,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 22:35:51,787 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 5 treesize of output 3 [2022-11-25 22:35:51,800 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 5 treesize of output 3 [2022-11-25 22:35:51,814 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:35:51,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 22:35:51,839 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:35:51,903 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 [2022-11-25 22:35:51,912 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 [2022-11-25 22:35:51,922 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 [2022-11-25 22:35:51,949 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 80 for LOIs [2022-11-25 22:35:52,316 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:36:07,164 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7340#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 2 |ULTIMATE.start_dll_circular_create_#in~len#1|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (<= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~data#1| 1) (<= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (<= |ULTIMATE.start_dll_circular_get_data_at_~index#1| 0) (<= 1 |ULTIMATE.start_dll_circular_get_data_at_#in~index#1|) (<= |ULTIMATE.start_main_~expected~0#1| 3) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 1 |ULTIMATE.start_dll_circular_create_#in~data#1|) (or (not (<= (+ 12 |ULTIMATE.start_dll_circular_get_data_at_~head#1.offset|) (select |#length| |ULTIMATE.start_dll_circular_get_data_at_~head#1.base|))) (not (<= 0 (+ 8 |ULTIMATE.start_dll_circular_get_data_at_~head#1.offset|)))) (= |ULTIMATE.start_main_~len~0#1| 2) (<= 0 |ULTIMATE.start_dll_circular_create_#res#1.offset|) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_dll_circular_create_~data#1|) (<= |ULTIMATE.start_dll_circular_create_#res#1.offset| 0) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 2) (<= 3 |ULTIMATE.start_main_~expected~0#1|) (<= |ULTIMATE.start_main_~i~0#1| 1) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= |ULTIMATE.start_dll_circular_get_data_at_#in~index#1| 1) (<= 0 |ULTIMATE.start_dll_circular_get_data_at_#in~head#1.offset|) (<= |ULTIMATE.start_dll_circular_create_~data#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |#NULL.base| 0) (<= |ULTIMATE.start_dll_circular_get_data_at_#in~head#1.offset| 0))' at error location [2022-11-25 22:36:07,164 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:36:07,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:36:07,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 34 [2022-11-25 22:36:07,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138809528] [2022-11-25 22:36:07,165 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:36:07,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-25 22:36:07,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:36:07,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-25 22:36:07,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=4551, Unknown=6, NotChecked=556, Total=5402 [2022-11-25 22:36:07,170 INFO L87 Difference]: Start difference. First operand 79 states and 97 transitions. Second operand has 35 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 22:36:10,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:36:10,012 INFO L93 Difference]: Finished difference Result 135 states and 154 transitions. [2022-11-25 22:36:10,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-25 22:36:10,013 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 39 [2022-11-25 22:36:10,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:36:10,014 INFO L225 Difference]: With dead ends: 135 [2022-11-25 22:36:10,014 INFO L226 Difference]: Without dead ends: 135 [2022-11-25 22:36:10,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 83 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1799 ImplicationChecksByTransitivity, 39.2s TimeCoverageRelationStatistics Valid=441, Invalid=6049, Unknown=6, NotChecked=644, Total=7140 [2022-11-25 22:36:10,017 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 432 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 1061 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 1078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-25 22:36:10,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [432 Valid, 596 Invalid, 1078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1061 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-25 22:36:10,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-11-25 22:36:10,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 78. [2022-11-25 22:36:10,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 59 states have (on average 1.4915254237288136) internal successors, (88), 74 states have internal predecessors, (88), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:36:10,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 92 transitions. [2022-11-25 22:36:10,021 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 92 transitions. Word has length 39 [2022-11-25 22:36:10,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:36:10,022 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 92 transitions. [2022-11-25 22:36:10,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 22:36:10,022 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 92 transitions. [2022-11-25 22:36:10,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-25 22:36:10,023 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:36:10,023 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:36:10,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-25 22:36:10,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-25 22:36:10,231 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-25 22:36:10,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:36:10,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1659221388, now seen corresponding path program 1 times [2022-11-25 22:36:10,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:36:10,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393847386] [2022-11-25 22:36:10,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:36:10,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:36:10,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:36:13,778 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:36:13,779 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:36:13,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393847386] [2022-11-25 22:36:13,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393847386] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:36:13,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934477248] [2022-11-25 22:36:13,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:36:13,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:36:13,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:36:13,781 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:36:13,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 22:36:14,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:36:14,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 112 conjunts are in the unsatisfiable core [2022-11-25 22:36:14,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:36:14,107 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 [2022-11-25 22:36:14,427 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 22:36:14,428 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 [2022-11-25 22:36:14,612 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 [2022-11-25 22:36:14,753 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-25 22:36:14,754 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-11-25 22:36:14,991 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-25 22:36:14,991 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 22 treesize of output 22 [2022-11-25 22:36:15,014 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 24 treesize of output 19 [2022-11-25 22:36:15,030 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 6 treesize of output 5 [2022-11-25 22:36:15,611 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-25 22:36:15,611 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 62 [2022-11-25 22:36:15,630 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 29 treesize of output 21 [2022-11-25 22:36:15,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:15,639 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 32 treesize of output 34 [2022-11-25 22:36:16,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:16,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:16,044 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 48 [2022-11-25 22:36:16,068 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 28 treesize of output 30 [2022-11-25 22:36:16,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:16,079 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 35 treesize of output 34 [2022-11-25 22:36:16,497 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 44 treesize of output 24 [2022-11-25 22:36:16,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-25 22:36:16,591 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 19 treesize of output 7 [2022-11-25 22:36:16,684 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 22:36:16,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:36:17,153 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse3 (* |c_ULTIMATE.start_main_~len~0#1| 2)) (.cse0 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_update_at_~head#1.base|)) (.cse2 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_update_at_~head#1.base|)) (.cse1 (+ 8 |c_ULTIMATE.start_dll_circular_update_at_~head#1.offset|))) (and (forall ((v_ArrVal_2631 Int) (v_ArrVal_2629 (Array Int Int)) (v_ArrVal_2627 Int)) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_dll_circular_update_at_~head#1.base| v_ArrVal_2629) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_update_at_~head#1.base| (store .cse0 .cse1 v_ArrVal_2631)) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)) (+ 8 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_update_at_~head#1.base| (store .cse2 .cse1 v_ArrVal_2627)) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) .cse3)) (forall ((v_ArrVal_2631 Int) (v_ArrVal_2629 (Array Int Int)) (v_ArrVal_2627 Int)) (<= .cse3 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_dll_circular_update_at_~head#1.base| v_ArrVal_2629) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_update_at_~head#1.base| (store .cse0 .cse1 v_ArrVal_2631)) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)) (+ 8 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_update_at_~head#1.base| (store .cse2 .cse1 v_ArrVal_2627)) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) 1))))) is different from false [2022-11-25 22:36:17,542 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:36:17,543 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 50 treesize of output 51 [2022-11-25 22:36:17,566 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:36:17,566 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 104 treesize of output 103 [2022-11-25 22:36:17,577 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 39 treesize of output 23 [2022-11-25 22:36:17,685 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:36:17,685 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 48 treesize of output 49 [2022-11-25 22:36:17,711 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:36:17,712 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 100 treesize of output 99 [2022-11-25 22:36:17,724 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 37 treesize of output 21 [2022-11-25 22:36:17,827 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~len~0#1| 2))) (and (forall ((|v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_68| Int)) (or (< |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_68| |c_ULTIMATE.start_main_~s~0#1.offset|) (forall ((v_ArrVal_2624 (Array Int Int)) (v_ArrVal_2631 Int)) (not (= |c_ULTIMATE.start_main_~s~0#1.base| (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_update_at_~head#1.base| v_ArrVal_2624) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_68| 8) v_ArrVal_2631) |c_ULTIMATE.start_main_~s~0#1.offset|)))))) (forall ((|v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_68| Int)) (or (< |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_68| |c_ULTIMATE.start_main_~s~0#1.offset|) (forall ((v_ArrVal_2624 (Array Int Int)) (v_ArrVal_2631 Int)) (= |c_ULTIMATE.start_dll_circular_update_at_~head#1.base| (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_update_at_~head#1.base| v_ArrVal_2624) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_68| 8) v_ArrVal_2631) |c_ULTIMATE.start_main_~s~0#1.offset|))))) (forall ((|v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_68| Int)) (or (< |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_68| |c_ULTIMATE.start_main_~s~0#1.offset|) (forall ((v_ArrVal_2623 (Array Int Int)) (v_ArrVal_2627 Int)) (= (select (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_update_at_~head#1.base| v_ArrVal_2623) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_68| 8) v_ArrVal_2627) |c_ULTIMATE.start_main_~s~0#1.offset|) |c_ULTIMATE.start_dll_circular_update_at_~head#1.offset|)))) (< |c_ULTIMATE.start_dll_circular_update_at_~data#1| .cse0) (<= .cse0 (+ |c_ULTIMATE.start_dll_circular_update_at_~data#1| 1)))) is different from false [2022-11-25 22:36:17,946 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (* |c_ULTIMATE.start_main_~len~0#1| 2)) (.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_update_at_~head#1.base|) |c_ULTIMATE.start_dll_circular_update_at_~head#1.offset|))) (and (forall ((|v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_68| Int)) (or (< |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_68| |c_ULTIMATE.start_main_~s~0#1.offset|) (forall ((v_ArrVal_2623 (Array Int Int)) (v_ArrVal_2627 Int)) (= (select (store (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_2623) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_68| 8) v_ArrVal_2627) |c_ULTIMATE.start_main_~s~0#1.offset|) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_update_at_~head#1.base|) |c_ULTIMATE.start_dll_circular_update_at_~head#1.offset|))))) (< |c_ULTIMATE.start_dll_circular_update_at_~data#1| .cse1) (forall ((|v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_68| Int)) (or (< |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_68| |c_ULTIMATE.start_main_~s~0#1.offset|) (forall ((v_ArrVal_2624 (Array Int Int)) (v_ArrVal_2631 Int)) (not (= (select (store (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_2624) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_68| 8) v_ArrVal_2631) |c_ULTIMATE.start_main_~s~0#1.offset|) |c_ULTIMATE.start_main_~s~0#1.base|))))) (<= .cse1 (+ |c_ULTIMATE.start_dll_circular_update_at_~data#1| 1)) (forall ((|v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_68| Int)) (or (forall ((v_ArrVal_2624 (Array Int Int)) (v_ArrVal_2631 Int)) (= (select (store (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_2624) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_68| 8) v_ArrVal_2631) |c_ULTIMATE.start_main_~s~0#1.offset|) .cse0)) (< |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_68| |c_ULTIMATE.start_main_~s~0#1.offset|))))) is different from false [2022-11-25 22:36:18,667 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_68| Int) (v_ArrVal_2624 (Array Int Int)) (v_ArrVal_2631 Int)) (or (< |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_68| |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (let ((.cse1 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|))) (let ((.cse0 (select .cse1 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))) (= .cse0 (select (store (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (store .cse1 (+ 4 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)) .cse0 v_ArrVal_2624) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_68| 8) v_ArrVal_2631) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|)))))) is different from false [2022-11-25 22:36:18,688 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_68| Int) (v_ArrVal_2624 (Array Int Int)) (v_ArrVal_2631 Int) (v_ArrVal_2619 (Array Int Int))) (or (< |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_68| |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| v_ArrVal_2619))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|))) (let ((.cse2 (select .cse1 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))) (= (select (store (select (store (store .cse0 |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (store .cse1 (+ 4 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)) .cse2 v_ArrVal_2624) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_68| 8) v_ArrVal_2631) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) .cse2)))))) is different from false [2022-11-25 22:36:18,953 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_68| Int) (v_ArrVal_2624 (Array Int Int)) (v_ArrVal_2631 Int) (v_ArrVal_2619 (Array Int Int)) (v_ArrVal_2618 (Array Int Int))) (or (let ((.cse0 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| v_ArrVal_2618) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| v_ArrVal_2619))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|))) (let ((.cse2 (select .cse1 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|))) (= (select (store (select (store (store .cse0 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base| (store .cse1 (+ |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)) .cse2 v_ArrVal_2624) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) (+ |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_68| 8) v_ArrVal_2631) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) .cse2)))) (< |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_68| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|))) is different from false [2022-11-25 22:36:18,983 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:36:18,984 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 89 treesize of output 66 [2022-11-25 22:36:18,992 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 442 treesize of output 420 [2022-11-25 22:36:18,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:36:19,003 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 374 treesize of output 358 [2022-11-25 22:36:19,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:36:19,017 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 143 treesize of output 131 [2022-11-25 22:36:19,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:36:19,032 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 230 treesize of output 206 [2022-11-25 22:36:19,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:36:19,046 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 160 treesize of output 146 [2022-11-25 22:36:20,148 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-11-25 22:36:20,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934477248] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:36:20,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1728382229] [2022-11-25 22:36:20,157 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2022-11-25 22:36:20,157 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:36:20,158 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:36:20,158 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:36:20,158 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:36:20,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 22:36:20,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 22:36:20,202 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 [2022-11-25 22:36:20,208 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 [2022-11-25 22:36:20,215 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 15 treesize of output 1 [2022-11-25 22:36:20,224 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 19 treesize of output 1 [2022-11-25 22:36:20,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:20,233 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 21 treesize of output 20 [2022-11-25 22:36:20,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:20,242 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 21 treesize of output 20 [2022-11-25 22:36:20,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:20,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:20,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-25 22:36:20,267 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 [2022-11-25 22:36:20,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:20,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:20,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-25 22:36:20,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 198 [2022-11-25 22:36:20,604 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 5 treesize of output 3 [2022-11-25 22:36:20,616 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:36:20,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 22:36:20,642 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 5 treesize of output 3 [2022-11-25 22:36:20,655 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:36:20,669 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:36:20,672 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:36:20,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 198 [2022-11-25 22:36:20,917 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 5 treesize of output 3 [2022-11-25 22:36:20,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 22:36:20,944 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:36:20,959 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:36:20,973 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 5 treesize of output 3 [2022-11-25 22:36:20,986 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:36:20,988 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:36:21,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-25 22:36:21,061 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 23 treesize of output 11 [2022-11-25 22:36:21,075 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 21 [2022-11-25 22:36:21,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:36:21,147 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 22:36:21,147 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 1 case distinctions, treesize of input 28 treesize of output 34 [2022-11-25 22:36:21,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:21,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-25 22:36:21,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:36:21,248 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 22:36:21,249 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 1 case distinctions, treesize of input 28 treesize of output 30 [2022-11-25 22:36:21,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:36:21,342 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 22:36:21,342 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 1 case distinctions, treesize of input 28 treesize of output 34 [2022-11-25 22:36:21,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:21,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-25 22:36:21,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:36:21,414 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 22:36:21,414 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 1 case distinctions, treesize of input 28 treesize of output 30 [2022-11-25 22:36:21,493 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 [2022-11-25 22:36:21,507 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 [2022-11-25 22:36:21,523 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 [2022-11-25 22:36:21,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:21,567 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 21 treesize of output 20 [2022-11-25 22:36:21,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:21,595 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 21 treesize of output 20 [2022-11-25 22:36:21,614 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 19 treesize of output 1 [2022-11-25 22:36:21,768 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 19 treesize of output 1 [2022-11-25 22:36:21,786 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 19 treesize of output 1 [2022-11-25 22:36:21,813 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 13 treesize of output 9 [2022-11-25 22:36:22,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 22:36:22,194 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-25 22:36:22,195 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 257 treesize of output 251 [2022-11-25 22:36:22,278 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-25 22:36:22,278 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 253 treesize of output 247 [2022-11-25 22:36:22,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 198 [2022-11-25 22:36:22,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-25 22:36:22,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:22,979 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 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-25 22:36:22,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:22,994 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 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-25 22:36:23,008 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 13 treesize of output 9 [2022-11-25 22:36:23,021 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 5 treesize of output 3 [2022-11-25 22:36:23,034 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:36:23,037 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:36:23,039 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:36:23,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 198 [2022-11-25 22:36:23,238 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 5 treesize of output 3 [2022-11-25 22:36:23,253 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:36:23,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 22:36:23,278 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 5 treesize of output 3 [2022-11-25 22:36:23,293 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:36:23,307 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:36:23,309 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:36:23,311 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:36:23,381 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 21 [2022-11-25 22:36:23,396 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 23 treesize of output 11 [2022-11-25 22:36:23,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-25 22:36:23,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 198 [2022-11-25 22:36:23,594 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 80 for LOIs [2022-11-25 22:36:23,990 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:36:45,780 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7907#(and (<= |ULTIMATE.start_dll_circular_get_data_at_#res#1| 2147483647) (<= (+ 12 |ULTIMATE.start_dll_circular_get_data_at_~head#1.offset|) (select |#length| |ULTIMATE.start_dll_circular_get_data_at_~head#1.base|)) (= (select |#valid| |ULTIMATE.start_dll_circular_get_data_at_~head#1.base|) 1) (<= 0 (+ 8 |ULTIMATE.start_dll_circular_get_data_at_~head#1.offset|)) (<= 2 |ULTIMATE.start_dll_circular_create_#in~len#1|) (<= 0 (+ 2147483648 |ULTIMATE.start_dll_circular_get_data_at_#res#1|)) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (<= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~data#1| 1) (<= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (<= |ULTIMATE.start_dll_circular_get_data_at_~index#1| 0) (= (+ |ULTIMATE.start_main_~len~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~expected~0#1|) (= |ULTIMATE.start_dll_circular_get_data_at_~head#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_get_data_at_#in~head#1.base|) |ULTIMATE.start_dll_circular_get_data_at_#in~head#1.offset|)) (= |ULTIMATE.start_main_~s~0#1.base| |ULTIMATE.start_dll_circular_get_data_at_#in~head#1.base|) (= |ULTIMATE.start_dll_circular_get_data_at_#in~index#1| (+ |ULTIMATE.start_dll_circular_get_data_at_~index#1| 1)) (= |ULTIMATE.start_dll_circular_get_data_at_#in~head#1.offset| |ULTIMATE.start_main_~s~0#1.offset|) (= |ULTIMATE.start_dll_circular_get_data_at_#in~index#1| |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 1 |ULTIMATE.start_dll_circular_create_#in~data#1|) (not (= |ULTIMATE.start_main_~expected~0#1| |ULTIMATE.start_dll_circular_get_data_at_#res#1|)) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_get_data_at_#in~head#1.base|) |ULTIMATE.start_dll_circular_get_data_at_#in~head#1.offset|) |ULTIMATE.start_dll_circular_get_data_at_~head#1.offset|) (<= 0 |ULTIMATE.start_dll_circular_create_#res#1.offset|) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_dll_circular_create_~data#1|) (<= (+ |ULTIMATE.start_dll_circular_get_data_at_#in~head#1.offset| 4) (select |#length| |ULTIMATE.start_dll_circular_get_data_at_#in~head#1.base|)) (<= |ULTIMATE.start_dll_circular_create_#res#1.offset| 0) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 2) (= (select |#valid| |ULTIMATE.start_dll_circular_get_data_at_#in~head#1.base|) 1) (<= 3 |ULTIMATE.start_main_~expected~0#1|) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= 0 |ULTIMATE.start_dll_circular_get_data_at_#in~head#1.offset|) (<= |ULTIMATE.start_dll_circular_create_~data#1| 1) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~len~0#1| (+ |ULTIMATE.start_main_~i~0#1| 1)) (<= 0 |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |#NULL.base| 0) (= (select (select |#memory_int| |ULTIMATE.start_dll_circular_get_data_at_~head#1.base|) (+ 8 |ULTIMATE.start_dll_circular_get_data_at_~head#1.offset|)) |ULTIMATE.start_dll_circular_get_data_at_#res#1|) (<= |ULTIMATE.start_dll_circular_get_data_at_#in~head#1.offset| 0))' at error location [2022-11-25 22:36:45,780 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:36:45,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:36:45,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 24, 25] total 67 [2022-11-25 22:36:45,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427656049] [2022-11-25 22:36:45,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:36:45,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-11-25 22:36:45,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:36:45,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-11-25 22:36:45,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=6908, Unknown=39, NotChecked=1038, Total=8372 [2022-11-25 22:36:45,786 INFO L87 Difference]: Start difference. First operand 78 states and 92 transitions. Second operand has 67 states, 61 states have (on average 1.6721311475409837) internal successors, (102), 59 states have internal predecessors, (102), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-25 22:36:54,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:36:54,117 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2022-11-25 22:36:54,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-25 22:36:54,118 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 61 states have (on average 1.6721311475409837) internal successors, (102), 59 states have internal predecessors, (102), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 41 [2022-11-25 22:36:54,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:36:54,118 INFO L225 Difference]: With dead ends: 86 [2022-11-25 22:36:54,119 INFO L226 Difference]: Without dead ends: 86 [2022-11-25 22:36:54,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 109 ConstructedPredicates, 6 IntricatePredicates, 1 DeprecatedPredicates, 3132 ImplicationChecksByTransitivity, 32.6s TimeCoverageRelationStatistics Valid=662, Invalid=10242, Unknown=40, NotChecked=1266, Total=12210 [2022-11-25 22:36:54,122 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 289 mSDsluCounter, 1123 mSDsCounter, 0 mSdLazyCounter, 1386 mSolverCounterSat, 21 mSolverCounterUnsat, 23 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 1157 SdHoareTripleChecker+Invalid, 1902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1386 IncrementalHoareTripleChecker+Invalid, 23 IncrementalHoareTripleChecker+Unknown, 472 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-25 22:36:54,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 1157 Invalid, 1902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1386 Invalid, 23 Unknown, 472 Unchecked, 2.8s Time] [2022-11-25 22:36:54,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-25 22:36:54,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 79. [2022-11-25 22:36:54,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 60 states have (on average 1.4833333333333334) internal successors, (89), 75 states have internal predecessors, (89), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:36:54,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 93 transitions. [2022-11-25 22:36:54,125 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 93 transitions. Word has length 41 [2022-11-25 22:36:54,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:36:54,125 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 93 transitions. [2022-11-25 22:36:54,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 61 states have (on average 1.6721311475409837) internal successors, (102), 59 states have internal predecessors, (102), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-25 22:36:54,126 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 93 transitions. [2022-11-25 22:36:54,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-25 22:36:54,126 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:36:54,126 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:36:54,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-25 22:36:54,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-25 22:36:54,327 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-25 22:36:54,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:36:54,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1662714431, now seen corresponding path program 2 times [2022-11-25 22:36:54,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:36:54,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616329427] [2022-11-25 22:36:54,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:36:54,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:36:54,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:36:54,505 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-25 22:36:54,505 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:36:54,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616329427] [2022-11-25 22:36:54,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616329427] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:36:54,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:36:54,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 22:36:54,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396198690] [2022-11-25 22:36:54,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:36:54,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 22:36:54,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:36:54,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 22:36:54,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:36:54,507 INFO L87 Difference]: Start difference. First operand 79 states and 93 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 22:36:54,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:36:54,639 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2022-11-25 22:36:54,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 22:36:54,640 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 41 [2022-11-25 22:36:54,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:36:54,641 INFO L225 Difference]: With dead ends: 66 [2022-11-25 22:36:54,641 INFO L226 Difference]: Without dead ends: 66 [2022-11-25 22:36:54,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-25 22:36:54,642 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 98 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:36:54,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 77 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:36:54,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-25 22:36:54,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-11-25 22:36:54,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 62 states have internal predecessors, (67), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:36:54,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2022-11-25 22:36:54,646 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 41 [2022-11-25 22:36:54,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:36:54,646 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2022-11-25 22:36:54,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 22:36:54,646 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2022-11-25 22:36:54,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-25 22:36:54,647 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:36:54,647 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:36:54,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-25 22:36:54,652 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-25 22:36:54,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:36:54,652 INFO L85 PathProgramCache]: Analyzing trace with hash 533703104, now seen corresponding path program 1 times [2022-11-25 22:36:54,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:36:54,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679719559] [2022-11-25 22:36:54,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:36:54,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:36:54,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:36:55,950 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-25 22:36:55,950 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:36:55,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679719559] [2022-11-25 22:36:55,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679719559] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:36:55,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036209924] [2022-11-25 22:36:55,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:36:55,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:36:55,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:36:55,952 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:36:55,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-25 22:36:56,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:36:56,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-25 22:36:56,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:36:56,608 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 17 treesize of output 13 [2022-11-25 22:36:56,980 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 19 treesize of output 7 [2022-11-25 22:36:57,024 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 22:36:57,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:36:57,348 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 38 treesize of output 32 [2022-11-25 22:36:57,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:57,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:57,660 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 22:36:57,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036209924] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:36:57,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1138671933] [2022-11-25 22:36:57,663 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2022-11-25 22:36:57,663 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:36:57,664 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:36:57,664 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:36:57,664 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:36:57,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 22:36:57,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 22:36:57,714 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 15 treesize of output 1 [2022-11-25 22:36:57,720 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 [2022-11-25 22:36:57,728 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 [2022-11-25 22:36:57,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:57,740 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 21 treesize of output 20 [2022-11-25 22:36:57,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:57,750 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 21 treesize of output 20 [2022-11-25 22:36:57,760 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 19 treesize of output 1 [2022-11-25 22:36:57,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:57,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:57,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-25 22:36:57,782 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 [2022-11-25 22:36:57,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:57,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:57,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-25 22:36:57,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 198 [2022-11-25 22:36:58,128 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 5 treesize of output 3 [2022-11-25 22:36:58,141 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:36:58,154 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 5 treesize of output 3 [2022-11-25 22:36:58,167 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:36:58,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 22:36:58,194 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:36:58,196 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:36:58,199 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:36:58,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 198 [2022-11-25 22:36:58,406 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:36:58,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 22:36:58,430 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 5 treesize of output 3 [2022-11-25 22:36:58,443 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 5 treesize of output 3 [2022-11-25 22:36:58,456 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:36:58,471 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:36:58,474 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:36:58,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-25 22:36:58,534 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 23 treesize of output 11 [2022-11-25 22:36:58,549 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 21 [2022-11-25 22:36:58,591 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:36:58,611 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 22:36:58,612 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 1 case distinctions, treesize of input 28 treesize of output 30 [2022-11-25 22:36:58,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:58,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-25 22:36:58,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:58,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:36:58,678 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 22:36:58,678 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 1 case distinctions, treesize of input 28 treesize of output 34 [2022-11-25 22:36:58,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:36:58,739 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 22:36:58,740 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 1 case distinctions, treesize of input 28 treesize of output 30 [2022-11-25 22:36:58,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:58,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:36:58,809 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 22:36:58,810 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 1 case distinctions, treesize of input 28 treesize of output 34 [2022-11-25 22:36:58,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:58,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-25 22:36:58,926 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 [2022-11-25 22:36:58,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 22:36:58,954 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 [2022-11-25 22:36:58,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:58,985 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 21 treesize of output 20 [2022-11-25 22:36:59,005 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 19 treesize of output 1 [2022-11-25 22:36:59,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:59,022 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 21 treesize of output 20 [2022-11-25 22:36:59,134 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 19 treesize of output 1 [2022-11-25 22:36:59,148 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 [2022-11-25 22:36:59,175 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 19 treesize of output 1 [2022-11-25 22:36:59,347 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 [2022-11-25 22:36:59,453 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-25 22:36:59,454 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 259 treesize of output 253 [2022-11-25 22:36:59,526 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-25 22:36:59,527 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 255 treesize of output 249 [2022-11-25 22:37:00,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 198 [2022-11-25 22:37:00,708 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 5 treesize of output 3 [2022-11-25 22:37:00,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:00,724 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 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-25 22:37:00,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-25 22:37:00,752 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 13 treesize of output 9 [2022-11-25 22:37:00,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:00,767 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 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-25 22:37:00,781 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:37:00,783 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:37:00,785 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:37:00,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 198 [2022-11-25 22:37:01,036 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 13 treesize of output 9 [2022-11-25 22:37:01,047 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 5 treesize of output 3 [2022-11-25 22:37:01,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-25 22:37:01,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:01,074 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 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-25 22:37:01,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:01,091 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 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-25 22:37:01,104 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:37:01,106 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:37:01,108 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:37:01,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-25 22:37:01,203 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 21 [2022-11-25 22:37:01,221 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 23 treesize of output 11 [2022-11-25 22:37:01,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 198 [2022-11-25 22:37:01,377 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 80 for LOIs [2022-11-25 22:37:01,737 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:37:17,780 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8573#(and (<= |ULTIMATE.start_dll_circular_get_data_at_#res#1| 2147483647) (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= (+ 12 |ULTIMATE.start_dll_circular_get_data_at_~head#1.offset|) (select |#length| |ULTIMATE.start_dll_circular_get_data_at_~head#1.base|)) (= (select |#valid| |ULTIMATE.start_dll_circular_get_data_at_~head#1.base|) 1) (<= 0 (+ 8 |ULTIMATE.start_dll_circular_get_data_at_~head#1.offset|)) (<= 2 |ULTIMATE.start_dll_circular_create_#in~len#1|) (<= 0 (+ 2147483648 |ULTIMATE.start_dll_circular_get_data_at_#res#1|)) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (<= 0 |ULTIMATE.start_dll_circular_get_data_at_~index#1|) (<= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~data#1| 1) (<= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (<= |ULTIMATE.start_dll_circular_get_data_at_~index#1| 0) (<= |ULTIMATE.start_main_~expected~0#1| 3) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 1 |ULTIMATE.start_dll_circular_create_#in~data#1|) (not (= |ULTIMATE.start_main_~expected~0#1| |ULTIMATE.start_dll_circular_get_data_at_#res#1|)) (= |ULTIMATE.start_main_~len~0#1| 2) (<= 0 |ULTIMATE.start_dll_circular_create_#res#1.offset|) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_dll_circular_create_~data#1|) (<= |ULTIMATE.start_dll_circular_create_#res#1.offset| 0) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 2) (<= |ULTIMATE.start_main_~i~0#1| 1) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= |ULTIMATE.start_dll_circular_get_data_at_#in~index#1| 1) (<= 0 |ULTIMATE.start_dll_circular_get_data_at_#in~head#1.offset|) (<= |ULTIMATE.start_dll_circular_create_~data#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |#NULL.base| 0) (= (select (select |#memory_int| |ULTIMATE.start_dll_circular_get_data_at_~head#1.base|) (+ 8 |ULTIMATE.start_dll_circular_get_data_at_~head#1.offset|)) |ULTIMATE.start_dll_circular_get_data_at_#res#1|) (<= |ULTIMATE.start_dll_circular_get_data_at_#in~head#1.offset| 0))' at error location [2022-11-25 22:37:17,781 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:37:17,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:37:17,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 10] total 31 [2022-11-25 22:37:17,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529990855] [2022-11-25 22:37:17,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:37:17,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-25 22:37:17,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:37:17,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-25 22:37:17,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2836, Unknown=0, NotChecked=0, Total=3080 [2022-11-25 22:37:17,784 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand has 31 states, 30 states have (on average 3.2666666666666666) internal successors, (98), 30 states have internal predecessors, (98), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 22:37:19,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:37:19,864 INFO L93 Difference]: Finished difference Result 94 states and 101 transitions. [2022-11-25 22:37:19,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 22:37:19,868 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.2666666666666666) internal successors, (98), 30 states have internal predecessors, (98), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 45 [2022-11-25 22:37:19,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:37:19,869 INFO L225 Difference]: With dead ends: 94 [2022-11-25 22:37:19,869 INFO L226 Difference]: Without dead ends: 94 [2022-11-25 22:37:19,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1180 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=417, Invalid=4005, Unknown=0, NotChecked=0, Total=4422 [2022-11-25 22:37:19,874 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 612 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 612 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:37:19,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [612 Valid, 552 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 22:37:19,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-25 22:37:19,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 68. [2022-11-25 22:37:19,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 64 states have internal predecessors, (69), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:37:19,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2022-11-25 22:37:19,881 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 45 [2022-11-25 22:37:19,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:37:19,882 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2022-11-25 22:37:19,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.2666666666666666) internal successors, (98), 30 states have internal predecessors, (98), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 22:37:19,882 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2022-11-25 22:37:19,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-25 22:37:19,883 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:37:19,883 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:37:19,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-25 22:37:20,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:37:20,092 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-25 22:37:20,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:37:20,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1790035807, now seen corresponding path program 1 times [2022-11-25 22:37:20,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:37:20,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881748144] [2022-11-25 22:37:20,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:37:20,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:37:20,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:37:20,254 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 22:37:20,255 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:37:20,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881748144] [2022-11-25 22:37:20,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881748144] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:37:20,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953565680] [2022-11-25 22:37:20,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:37:20,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:37:20,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:37:20,257 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:37:20,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-25 22:37:20,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:37:20,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 22:37:20,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:37:20,669 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 [2022-11-25 22:37:20,890 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 22:37:20,890 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:37:20,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953565680] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:37:20,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:37:20,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4] total 9 [2022-11-25 22:37:20,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784616209] [2022-11-25 22:37:20,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:37:20,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 22:37:20,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:37:20,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 22:37:20,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-25 22:37:20,893 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand has 9 states, 7 states have (on average 5.142857142857143) internal successors, (36), 8 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 22:37:21,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:37:21,318 INFO L93 Difference]: Finished difference Result 85 states and 90 transitions. [2022-11-25 22:37:21,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 22:37:21,319 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 5.142857142857143) internal successors, (36), 8 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 47 [2022-11-25 22:37:21,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:37:21,320 INFO L225 Difference]: With dead ends: 85 [2022-11-25 22:37:21,320 INFO L226 Difference]: Without dead ends: 85 [2022-11-25 22:37:21,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-11-25 22:37:21,321 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 118 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:37:21,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 134 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 22:37:21,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-25 22:37:21,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 71. [2022-11-25 22:37:21,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 57 states have (on average 1.3157894736842106) internal successors, (75), 67 states have internal predecessors, (75), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:37:21,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2022-11-25 22:37:21,325 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 47 [2022-11-25 22:37:21,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:37:21,325 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2022-11-25 22:37:21,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 5.142857142857143) internal successors, (36), 8 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 22:37:21,326 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2022-11-25 22:37:21,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-25 22:37:21,326 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:37:21,327 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:37:21,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-25 22:37:21,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-25 22:37:21,535 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-25 22:37:21,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:37:21,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1790035808, now seen corresponding path program 1 times [2022-11-25 22:37:21,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:37:21,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102874866] [2022-11-25 22:37:21,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:37:21,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:37:21,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:37:22,091 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 22:37:22,092 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:37:22,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102874866] [2022-11-25 22:37:22,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102874866] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:37:22,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:37:22,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 22:37:22,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236990085] [2022-11-25 22:37:22,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:37:22,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 22:37:22,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:37:22,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 22:37:22,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-25 22:37:22,094 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand has 9 states, 7 states have (on average 5.142857142857143) internal successors, (36), 8 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 22:37:22,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:37:22,578 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2022-11-25 22:37:22,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 22:37:22,579 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 5.142857142857143) internal successors, (36), 8 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 47 [2022-11-25 22:37:22,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:37:22,580 INFO L225 Difference]: With dead ends: 69 [2022-11-25 22:37:22,580 INFO L226 Difference]: Without dead ends: 69 [2022-11-25 22:37:22,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-25 22:37:22,581 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 122 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:37:22,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 96 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 22:37:22,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-11-25 22:37:22,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-11-25 22:37:22,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 57 states have (on average 1.263157894736842) internal successors, (72), 65 states have internal predecessors, (72), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:37:22,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 76 transitions. [2022-11-25 22:37:22,584 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 76 transitions. Word has length 47 [2022-11-25 22:37:22,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:37:22,584 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 76 transitions. [2022-11-25 22:37:22,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 5.142857142857143) internal successors, (36), 8 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 22:37:22,585 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 76 transitions. [2022-11-25 22:37:22,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-25 22:37:22,585 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:37:22,585 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:37:22,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-25 22:37:22,586 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-25 22:37:22,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:37:22,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1569141920, now seen corresponding path program 2 times [2022-11-25 22:37:22,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:37:22,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818029191] [2022-11-25 22:37:22,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:37:22,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:37:22,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:37:22,770 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 22:37:22,770 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:37:22,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818029191] [2022-11-25 22:37:22,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818029191] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:37:22,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043603903] [2022-11-25 22:37:22,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:37:22,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:37:22,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:37:22,777 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:37:22,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-25 22:37:23,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 22:37:23,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:37:23,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 22:37:23,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:37:23,414 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 22:37:23,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:37:23,533 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 22:37:23,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043603903] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:37:23,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1374527904] [2022-11-25 22:37:23,536 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2022-11-25 22:37:23,536 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:37:23,536 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:37:23,537 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:37:23,537 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:37:23,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 22:37:23,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 22:37:23,578 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 15 treesize of output 1 [2022-11-25 22:37:23,584 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 [2022-11-25 22:37:23,590 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 [2022-11-25 22:37:23,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:23,601 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 21 treesize of output 20 [2022-11-25 22:37:23,607 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 19 treesize of output 1 [2022-11-25 22:37:23,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:23,616 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 21 treesize of output 20 [2022-11-25 22:37:23,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:23,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:23,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-25 22:37:23,639 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 [2022-11-25 22:37:23,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:23,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:23,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-25 22:37:23,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 198 [2022-11-25 22:37:24,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 22:37:24,016 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 5 treesize of output 3 [2022-11-25 22:37:24,030 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 5 treesize of output 3 [2022-11-25 22:37:24,045 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:37:24,059 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:37:24,075 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:37:24,077 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:37:24,080 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:37:24,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 198 [2022-11-25 22:37:24,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:24,255 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 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-25 22:37:24,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-25 22:37:24,281 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 5 treesize of output 3 [2022-11-25 22:37:24,294 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 13 treesize of output 9 [2022-11-25 22:37:24,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:24,310 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 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-25 22:37:24,324 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:37:24,330 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:37:24,333 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:37:24,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:37:24,420 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 248 treesize of output 232 [2022-11-25 22:37:24,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:24,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:37:24,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:24,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:37:24,443 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 246 treesize of output 233 [2022-11-25 22:37:24,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:24,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:37:24,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:37:24,463 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 240 treesize of output 227 [2022-11-25 22:37:24,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:24,549 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 230 treesize of output 208 [2022-11-25 22:37:24,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:37:24,599 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-25 22:37:24,599 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 1 case distinctions, treesize of input 231 treesize of output 231 [2022-11-25 22:37:24,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:37:24,639 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-25 22:37:24,639 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 1 case distinctions, treesize of input 219 treesize of output 215 [2022-11-25 22:37:24,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:24,785 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 230 treesize of output 208 [2022-11-25 22:37:24,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:37:24,832 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-25 22:37:24,833 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 1 case distinctions, treesize of input 231 treesize of output 231 [2022-11-25 22:37:24,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:37:24,875 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-25 22:37:24,876 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 1 case distinctions, treesize of input 219 treesize of output 215 [2022-11-25 22:37:25,002 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 [2022-11-25 22:37:25,018 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 [2022-11-25 22:37:25,029 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 [2022-11-25 22:37:25,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:25,062 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 21 treesize of output 20 [2022-11-25 22:37:25,076 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 19 treesize of output 1 [2022-11-25 22:37:25,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:25,095 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 21 treesize of output 20 [2022-11-25 22:37:25,207 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 [2022-11-25 22:37:25,221 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 19 treesize of output 1 [2022-11-25 22:37:25,237 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 19 treesize of output 1 [2022-11-25 22:37:25,345 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 [2022-11-25 22:37:25,359 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 19 treesize of output 1 [2022-11-25 22:37:25,379 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 19 treesize of output 1 [2022-11-25 22:37:26,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 198 [2022-11-25 22:37:26,455 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 5 treesize of output 3 [2022-11-25 22:37:26,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:26,470 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 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-25 22:37:26,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-25 22:37:26,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:26,497 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 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-25 22:37:26,510 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 13 treesize of output 9 [2022-11-25 22:37:26,532 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:37:26,534 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:37:26,536 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:37:26,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 198 [2022-11-25 22:37:26,754 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 5 treesize of output 3 [2022-11-25 22:37:26,768 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:37:26,780 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 5 treesize of output 3 [2022-11-25 22:37:26,794 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:37:26,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 22:37:26,832 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:37:26,835 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:37:26,902 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 [2022-11-25 22:37:26,910 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 [2022-11-25 22:37:26,920 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 [2022-11-25 22:37:26,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 198 [2022-11-25 22:37:27,087 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 80 for LOIs [2022-11-25 22:37:27,412 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:37:42,296 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9534#(and (<= |ULTIMATE.start_dll_circular_get_data_at_#res#1| 2147483647) (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= (+ 12 |ULTIMATE.start_dll_circular_get_data_at_~head#1.offset|) (select |#length| |ULTIMATE.start_dll_circular_get_data_at_~head#1.base|)) (= (select |#valid| |ULTIMATE.start_dll_circular_get_data_at_~head#1.base|) 1) (<= 0 (+ 8 |ULTIMATE.start_dll_circular_get_data_at_~head#1.offset|)) (<= 2 |ULTIMATE.start_dll_circular_create_#in~len#1|) (<= 0 (+ 2147483648 |ULTIMATE.start_dll_circular_get_data_at_#res#1|)) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (<= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~data#1| 1) (<= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (<= |ULTIMATE.start_dll_circular_get_data_at_~index#1| 0) (<= |#NULL.offset| 0) (or (and (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 1 |ULTIMATE.start_dll_circular_get_data_at_#in~index#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_main_~len~0#1| 2) (<= 3 |ULTIMATE.start_main_~expected~0#1|) (= |#NULL.base| 0)) (and (= |ULTIMATE.start_dll_circular_get_data_at_#in~index#1| |ULTIMATE.start_dll_circular_get_data_at_~index#1|) (= (+ |ULTIMATE.start_main_~len~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~expected~0#1|) (= |ULTIMATE.start_main_~s~0#1.base| |ULTIMATE.start_dll_circular_get_data_at_#in~head#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_dll_circular_get_data_at_#in~index#1| |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (exists ((|v_ULTIMATE.start_dll_circular_get_data_at_~head#1.offset_47| Int) (|v_ULTIMATE.start_dll_circular_get_data_at_~head#1.base_50| Int)) (and (<= (+ |v_ULTIMATE.start_dll_circular_get_data_at_~head#1.offset_47| 12) (select |#length| |v_ULTIMATE.start_dll_circular_get_data_at_~head#1.base_50|)) (<= (select (select |#memory_int| |v_ULTIMATE.start_dll_circular_get_data_at_~head#1.base_50|) (+ |v_ULTIMATE.start_dll_circular_get_data_at_~head#1.offset_47| 8)) 3) (= (select |#valid| |v_ULTIMATE.start_dll_circular_get_data_at_~head#1.base_50|) 1) (<= 3 (select (select |#memory_int| |v_ULTIMATE.start_dll_circular_get_data_at_~head#1.base_50|) (+ |v_ULTIMATE.start_dll_circular_get_data_at_~head#1.offset_47| 8))) (<= 0 (+ |v_ULTIMATE.start_dll_circular_get_data_at_~head#1.offset_47| 8)))) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_dll_circular_get_data_at_#in~head#1.offset| |ULTIMATE.start_dll_circular_get_data_at_~head#1.offset|) (= |ULTIMATE.start_dll_circular_get_data_at_~head#1.base| |ULTIMATE.start_dll_circular_get_data_at_#in~head#1.base|) (= |#NULL.base| 0))) (<= |ULTIMATE.start_main_~expected~0#1| 3) (<= 1 |ULTIMATE.start_dll_circular_create_#in~data#1|) (not (= |ULTIMATE.start_main_~expected~0#1| |ULTIMATE.start_dll_circular_get_data_at_#res#1|)) (<= 0 |ULTIMATE.start_dll_circular_create_#res#1.offset|) (<= 1 |ULTIMATE.start_dll_circular_create_~data#1|) (<= |ULTIMATE.start_dll_circular_create_#res#1.offset| 0) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 2) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~i~0#1| 1) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= |ULTIMATE.start_dll_circular_get_data_at_#in~index#1| 1) (<= 0 |ULTIMATE.start_dll_circular_get_data_at_#in~head#1.offset|) (<= |ULTIMATE.start_dll_circular_create_~data#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= (select (select |#memory_int| |ULTIMATE.start_dll_circular_get_data_at_~head#1.base|) (+ 8 |ULTIMATE.start_dll_circular_get_data_at_~head#1.offset|)) |ULTIMATE.start_dll_circular_get_data_at_#res#1|) (<= |ULTIMATE.start_dll_circular_get_data_at_#in~head#1.offset| 0))' at error location [2022-11-25 22:37:42,296 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:37:42,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:37:42,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2022-11-25 22:37:42,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159068705] [2022-11-25 22:37:42,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:37:42,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 22:37:42,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:37:42,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 22:37:42,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=988, Unknown=1, NotChecked=0, Total=1190 [2022-11-25 22:37:42,307 INFO L87 Difference]: Start difference. First operand 69 states and 76 transitions. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 states have internal predecessors, (59), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 22:37:42,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:37:42,515 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2022-11-25 22:37:42,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 22:37:42,515 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 states have internal predecessors, (59), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2022-11-25 22:37:42,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:37:42,516 INFO L225 Difference]: With dead ends: 63 [2022-11-25 22:37:42,516 INFO L226 Difference]: Without dead ends: 63 [2022-11-25 22:37:42,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 108 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=221, Invalid=1110, Unknown=1, NotChecked=0, Total=1332 [2022-11-25 22:37:42,517 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 103 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:37:42,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 85 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:37:42,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-25 22:37:42,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-11-25 22:37:42,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 52 states have (on average 1.25) internal successors, (65), 59 states have internal predecessors, (65), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:37:42,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2022-11-25 22:37:42,520 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 47 [2022-11-25 22:37:42,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:37:42,520 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2022-11-25 22:37:42,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 states have internal predecessors, (59), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 22:37:42,521 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2022-11-25 22:37:42,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-25 22:37:42,521 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:37:42,522 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:37:42,532 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-11-25 22:37:42,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-25 22:37:42,732 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-25 22:37:42,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:37:42,733 INFO L85 PathProgramCache]: Analyzing trace with hash -343430943, now seen corresponding path program 1 times [2022-11-25 22:37:42,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:37:42,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613289903] [2022-11-25 22:37:42,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:37:42,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:37:42,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:37:42,969 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 22:37:42,970 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:37:42,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613289903] [2022-11-25 22:37:42,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613289903] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:37:42,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:37:42,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-25 22:37:42,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936626423] [2022-11-25 22:37:42,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:37:42,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 22:37:42,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:37:42,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 22:37:42,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-25 22:37:42,972 INFO L87 Difference]: Start difference. First operand 63 states and 69 transitions. Second operand has 9 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 22:37:43,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:37:43,342 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2022-11-25 22:37:43,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 22:37:43,343 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 48 [2022-11-25 22:37:43,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:37:43,344 INFO L225 Difference]: With dead ends: 63 [2022-11-25 22:37:43,344 INFO L226 Difference]: Without dead ends: 63 [2022-11-25 22:37:43,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-25 22:37:43,345 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 113 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:37:43,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 111 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 22:37:43,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-25 22:37:43,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-11-25 22:37:43,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 52 states have (on average 1.2307692307692308) internal successors, (64), 59 states have internal predecessors, (64), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:37:43,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2022-11-25 22:37:43,348 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 48 [2022-11-25 22:37:43,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:37:43,348 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2022-11-25 22:37:43,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 22:37:43,348 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2022-11-25 22:37:43,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-25 22:37:43,349 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:37:43,349 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:37:43,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-11-25 22:37:43,349 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-25 22:37:43,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:37:43,350 INFO L85 PathProgramCache]: Analyzing trace with hash -2057397907, now seen corresponding path program 1 times [2022-11-25 22:37:43,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:37:43,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373182540] [2022-11-25 22:37:43,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:37:43,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:37:43,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:37:43,650 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 22:37:43,650 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:37:43,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373182540] [2022-11-25 22:37:43,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373182540] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:37:43,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036703350] [2022-11-25 22:37:43,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:37:43,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:37:43,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:37:43,653 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:37:43,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-25 22:37:44,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:37:44,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-25 22:37:44,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:37:44,535 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 17 treesize of output 9 [2022-11-25 22:37:44,542 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 22:37:44,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:37:44,703 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-25 22:37:44,703 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 16 treesize of output 15 [2022-11-25 22:37:44,799 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-25 22:37:44,799 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 11 treesize of output 11 [2022-11-25 22:37:44,950 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 22:37:44,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036703350] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:37:44,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1785761395] [2022-11-25 22:37:44,952 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2022-11-25 22:37:44,952 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:37:44,953 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:37:44,953 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:37:44,953 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:37:44,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 22:37:44,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 22:37:44,995 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 [2022-11-25 22:37:45,002 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 [2022-11-25 22:37:45,009 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 15 treesize of output 1 [2022-11-25 22:37:45,018 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 19 treesize of output 1 [2022-11-25 22:37:45,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:45,029 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 21 treesize of output 20 [2022-11-25 22:37:45,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:45,039 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 21 treesize of output 20 [2022-11-25 22:37:45,049 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 [2022-11-25 22:37:45,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:45,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:45,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-25 22:37:45,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:45,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:45,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-25 22:37:45,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 198 [2022-11-25 22:37:45,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 22:37:45,412 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:37:45,426 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 5 treesize of output 3 [2022-11-25 22:37:45,440 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:37:45,456 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 5 treesize of output 3 [2022-11-25 22:37:45,471 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:37:45,475 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:37:45,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 198 [2022-11-25 22:37:45,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:45,698 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 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-25 22:37:45,711 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 13 treesize of output 9 [2022-11-25 22:37:45,724 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 5 treesize of output 3 [2022-11-25 22:37:45,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-25 22:37:45,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:45,752 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 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-25 22:37:45,766 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:37:45,768 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:37:45,770 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:37:45,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:37:45,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:45,859 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 248 treesize of output 232 [2022-11-25 22:37:45,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:45,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:37:45,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:45,878 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:37:45,879 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 246 treesize of output 233 [2022-11-25 22:37:45,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:45,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:37:45,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:37:45,901 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 240 treesize of output 227 [2022-11-25 22:37:45,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:45,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 230 treesize of output 208 [2022-11-25 22:37:46,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:37:46,029 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-25 22:37:46,030 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 1 case distinctions, treesize of input 231 treesize of output 227 [2022-11-25 22:37:46,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:46,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:37:46,080 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-25 22:37:46,081 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 1 case distinctions, treesize of input 231 treesize of output 231 [2022-11-25 22:37:46,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:46,213 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 230 treesize of output 208 [2022-11-25 22:37:46,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:37:46,255 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-25 22:37:46,255 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 1 case distinctions, treesize of input 231 treesize of output 227 [2022-11-25 22:37:46,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:46,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:37:46,305 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-25 22:37:46,306 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 1 case distinctions, treesize of input 231 treesize of output 231 [2022-11-25 22:37:46,424 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 11 treesize of output 7 [2022-11-25 22:37:46,436 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 15 treesize of output 1 [2022-11-25 22:37:46,452 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 [2022-11-25 22:37:46,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:46,490 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 21 treesize of output 20 [2022-11-25 22:37:46,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:46,515 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 21 treesize of output 20 [2022-11-25 22:37:46,531 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 19 treesize of output 1 [2022-11-25 22:37:46,643 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 19 treesize of output 1 [2022-11-25 22:37:46,657 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 [2022-11-25 22:37:46,672 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 19 treesize of output 1 [2022-11-25 22:37:46,930 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-25 22:37:46,931 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 257 treesize of output 251 [2022-11-25 22:37:47,005 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-25 22:37:47,005 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 253 treesize of output 247 [2022-11-25 22:37:47,146 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 [2022-11-25 22:37:47,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 198 [2022-11-25 22:37:47,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 22:37:47,956 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 5 treesize of output 3 [2022-11-25 22:37:47,967 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 5 treesize of output 3 [2022-11-25 22:37:47,983 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:37:47,997 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:37:48,010 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:37:48,013 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:37:48,014 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:37:48,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 198 [2022-11-25 22:37:48,201 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 5 treesize of output 3 [2022-11-25 22:37:48,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-25 22:37:48,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:48,227 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 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-25 22:37:48,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:48,243 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 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-25 22:37:48,262 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 13 treesize of output 9 [2022-11-25 22:37:48,274 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:37:48,276 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:37:48,279 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:37:48,338 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 [2022-11-25 22:37:48,349 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 [2022-11-25 22:37:48,360 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 [2022-11-25 22:37:48,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 198 [2022-11-25 22:37:48,495 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 80 for LOIs [2022-11-25 22:37:48,835 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:38:07,392 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10142#(and (= |ULTIMATE.start_dll_circular_destroy_#in~head#1.offset| |ULTIMATE.start_main_~s~0#1.offset|) (not (= |ULTIMATE.start_dll_circular_destroy_~head#1.base| 0)) (<= 2 |ULTIMATE.start_dll_circular_create_#in~len#1|) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (<= 0 |ULTIMATE.start_dll_circular_destroy_~head#1.offset|) (<= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~data#1| 1) (= |ULTIMATE.start_dll_circular_destroy_~p~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_destroy_~head#1.base|) |ULTIMATE.start_dll_circular_destroy_~head#1.offset|)) (<= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= 1 (select |#valid| |ULTIMATE.start_dll_circular_destroy_~head#1.base|)) (<= (+ |ULTIMATE.start_dll_circular_destroy_~head#1.offset| 4) (select |#length| |ULTIMATE.start_dll_circular_destroy_~head#1.base|)) (<= (+ |ULTIMATE.start_main_~i~0#1| 1) 0) (not (= (select |#valid| |ULTIMATE.start_dll_circular_destroy_~p~0#1.base|) 1)) (= |ULTIMATE.start_dll_circular_destroy_~p~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_destroy_~head#1.base|) |ULTIMATE.start_dll_circular_destroy_~head#1.offset|)) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_dll_circular_destroy_#in~head#1.base| |ULTIMATE.start_main_~s~0#1.base|) (<= 1 |ULTIMATE.start_dll_circular_create_#in~data#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_dll_circular_destroy_~head#1.base| |ULTIMATE.start_dll_circular_destroy_#in~head#1.base|) (<= 0 |ULTIMATE.start_dll_circular_create_#res#1.offset|) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_dll_circular_create_~data#1|) (<= |ULTIMATE.start_dll_circular_create_#res#1.offset| 0) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 2) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= |ULTIMATE.start_dll_circular_create_~data#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |ULTIMATE.start_dll_circular_destroy_~head#1.offset| |ULTIMATE.start_dll_circular_destroy_#in~head#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-25 22:38:07,392 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:38:07,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:38:07,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 12, 6] total 20 [2022-11-25 22:38:07,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550411686] [2022-11-25 22:38:07,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:38:07,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 22:38:07,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:38:07,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 22:38:07,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=2221, Unknown=1, NotChecked=0, Total=2450 [2022-11-25 22:38:07,395 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand has 21 states, 19 states have (on average 4.157894736842105) internal successors, (79), 20 states have internal predecessors, (79), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-25 22:38:08,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:38:08,450 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2022-11-25 22:38:08,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 22:38:08,450 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 4.157894736842105) internal successors, (79), 20 states have internal predecessors, (79), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2022-11-25 22:38:08,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:38:08,451 INFO L225 Difference]: With dead ends: 70 [2022-11-25 22:38:08,451 INFO L226 Difference]: Without dead ends: 70 [2022-11-25 22:38:08,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=346, Invalid=3193, Unknown=1, NotChecked=0, Total=3540 [2022-11-25 22:38:08,453 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 206 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 22:38:08,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 179 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 22:38:08,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-25 22:38:08,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2022-11-25 22:38:08,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 53 states have (on average 1.2264150943396226) internal successors, (65), 59 states have internal predecessors, (65), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:38:08,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2022-11-25 22:38:08,457 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 49 [2022-11-25 22:38:08,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:38:08,457 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2022-11-25 22:38:08,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 4.157894736842105) internal successors, (79), 20 states have internal predecessors, (79), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-25 22:38:08,458 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2022-11-25 22:38:08,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-25 22:38:08,458 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:38:08,459 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:38:08,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-25 22:38:08,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-25 22:38:08,666 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-25 22:38:08,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:38:08,667 INFO L85 PathProgramCache]: Analyzing trace with hash -2057397906, now seen corresponding path program 1 times [2022-11-25 22:38:08,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:38:08,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889931207] [2022-11-25 22:38:08,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:38:08,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:38:08,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:38:10,976 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 22:38:10,977 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:38:10,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889931207] [2022-11-25 22:38:10,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889931207] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:38:10,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741051785] [2022-11-25 22:38:10,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:38:10,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:38:10,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:38:10,979 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:38:10,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-25 22:38:11,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:38:11,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 109 conjunts are in the unsatisfiable core [2022-11-25 22:38:11,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:38:11,395 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 [2022-11-25 22:38:11,611 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 22:38:11,611 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 [2022-11-25 22:38:11,784 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 [2022-11-25 22:38:11,795 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 [2022-11-25 22:38:11,935 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-25 22:38:11,935 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2022-11-25 22:38:11,944 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 [2022-11-25 22:38:12,163 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-25 22:38:12,163 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-11-25 22:38:12,182 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 [2022-11-25 22:38:12,297 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-25 22:38:12,298 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 21 treesize of output 26 [2022-11-25 22:38:12,326 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-25 22:38:12,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 27 [2022-11-25 22:38:12,588 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:38:12,588 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 33 treesize of output 33 [2022-11-25 22:38:12,769 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 22:38:12,769 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 43 treesize of output 47 [2022-11-25 22:38:13,093 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-25 22:38:13,094 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 34 treesize of output 39 [2022-11-25 22:38:13,893 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 23 treesize of output 15 [2022-11-25 22:38:13,908 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-25 22:38:13,908 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 39 treesize of output 30 [2022-11-25 22:38:14,009 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 22:38:14,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:38:14,431 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:38:14,432 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 32 treesize of output 36 [2022-11-25 22:38:14,612 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:38:14,613 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 28 treesize of output 32 [2022-11-25 22:38:15,593 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~s~0#1.offset_24| Int) (v_ArrVal_3634 Int) (v_ArrVal_3635 Int) (v_ArrVal_3637 (Array Int Int))) (or (<= 0 (select (select (let ((.cse0 (+ 4 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))) (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) .cse0 v_ArrVal_3634)) (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) .cse0 v_ArrVal_3635) |v_ULTIMATE.start_main_~s~0#1.offset_24|) v_ArrVal_3637)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |v_ULTIMATE.start_main_~s~0#1.offset_24|)) (not (<= 0 |v_ULTIMATE.start_main_~s~0#1.offset_24|)) (< |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| |v_ULTIMATE.start_main_~s~0#1.offset_24|))) is different from false [2022-11-25 22:38:16,341 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:38:16,341 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 71 treesize of output 64 [2022-11-25 22:38:16,354 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:38:16,354 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 55 treesize of output 56 [2022-11-25 22:38:16,362 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 196 treesize of output 192 [2022-11-25 22:38:16,376 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 790 treesize of output 780 [2022-11-25 22:38:16,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:38:16,393 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 694 treesize of output 662 [2022-11-25 22:38:16,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:38:16,428 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:38:16,429 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 298 treesize of output 288 [2022-11-25 22:38:16,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:38:16,455 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 290 treesize of output 274 [2022-11-25 22:38:16,466 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:38:16,470 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 530 treesize of output 522 [2022-11-25 22:38:16,482 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:38:16,487 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 482 treesize of output 466 [2022-11-25 22:38:16,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:38:16,515 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:38:16,516 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 452 treesize of output 450 [2022-11-25 22:38:16,537 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 438 treesize of output 406 [2022-11-25 22:38:17,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741051785] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:38:17,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1871369607] [2022-11-25 22:38:17,487 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2022-11-25 22:38:17,487 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:38:17,488 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:38:17,488 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:38:17,488 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:38:17,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 22:38:17,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 22:38:17,553 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 15 treesize of output 1 [2022-11-25 22:38:17,559 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 [2022-11-25 22:38:17,565 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 [2022-11-25 22:38:17,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:38:17,576 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 21 treesize of output 20 [2022-11-25 22:38:17,583 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 19 treesize of output 1 [2022-11-25 22:38:17,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:38:17,597 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 21 treesize of output 20 [2022-11-25 22:38:17,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:38:17,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:38:17,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-25 22:38:17,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:38:17,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:38:17,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-25 22:38:17,640 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 [2022-11-25 22:38:17,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 198 [2022-11-25 22:38:17,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 22:38:17,917 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:38:17,931 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:38:17,944 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 5 treesize of output 3 [2022-11-25 22:38:17,956 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 5 treesize of output 3 [2022-11-25 22:38:17,970 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:38:17,973 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:38:17,975 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:38:18,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 198 [2022-11-25 22:38:18,140 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 5 treesize of output 3 [2022-11-25 22:38:18,153 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:38:18,167 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 5 treesize of output 3 [2022-11-25 22:38:18,180 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:38:18,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 22:38:18,210 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:38:18,212 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:38:18,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-25 22:38:18,276 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 23 treesize of output 11 [2022-11-25 22:38:18,289 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 21 [2022-11-25 22:38:18,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:38:18,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-25 22:38:18,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:38:18,398 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 22:38:18,398 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 1 case distinctions, treesize of input 28 treesize of output 34 [2022-11-25 22:38:18,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:38:18,439 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 22:38:18,439 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 1 case distinctions, treesize of input 28 treesize of output 30 [2022-11-25 22:38:18,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:38:18,510 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 22:38:18,510 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 1 case distinctions, treesize of input 28 treesize of output 30 [2022-11-25 22:38:18,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:38:18,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-25 22:38:18,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:38:18,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:38:18,574 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 22:38:18,574 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 1 case distinctions, treesize of input 28 treesize of output 34 [2022-11-25 22:38:18,637 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 [2022-11-25 22:38:18,650 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 [2022-11-25 22:38:18,661 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 [2022-11-25 22:38:18,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:38:18,693 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 21 treesize of output 20 [2022-11-25 22:38:18,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:38:18,716 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 21 treesize of output 20 [2022-11-25 22:38:18,730 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 19 treesize of output 1 [2022-11-25 22:38:18,839 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 19 treesize of output 1 [2022-11-25 22:38:18,851 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 [2022-11-25 22:38:18,864 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 19 treesize of output 1 [2022-11-25 22:38:18,974 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 19 treesize of output 1 [2022-11-25 22:38:18,990 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 19 treesize of output 1 [2022-11-25 22:38:19,003 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 [2022-11-25 22:38:19,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 198 [2022-11-25 22:38:19,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-25 22:38:19,765 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 13 treesize of output 9 [2022-11-25 22:38:19,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:38:19,780 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 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-25 22:38:19,792 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 5 treesize of output 3 [2022-11-25 22:38:19,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:38:19,808 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 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-25 22:38:19,822 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:38:19,824 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:38:19,826 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:38:19,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 198 [2022-11-25 22:38:20,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:38:20,032 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 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-25 22:38:20,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:38:20,048 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 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-25 22:38:20,063 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 5 treesize of output 3 [2022-11-25 22:38:20,075 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 13 treesize of output 9 [2022-11-25 22:38:20,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-25 22:38:20,100 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:38:20,102 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:38:20,105 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:38:20,107 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:38:20,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-25 22:38:20,215 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 23 treesize of output 11 [2022-11-25 22:38:20,230 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 21 [2022-11-25 22:38:20,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 198 [2022-11-25 22:38:20,400 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 80 for LOIs [2022-11-25 22:38:20,733 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:38:24,574 WARN L859 $PredicateComparison]: unable to prove that (and (< |c_node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (let ((.cse9 (+ |c_node_create_~temp~0#1.offset| 4))) (let ((.cse0 (< 0 |c_#StackHeapBarrier|)) (.cse8 (select |c_old(#memory_int)| |c_node_create_~temp~0#1.base|)) (.cse10 (select (select |c_#memory_int| |c_node_create_~temp~0#1.base|) .cse9)) (.cse1 (= |c_node_create_#in~data#1| 1)) (.cse2 (= |c_#NULL.offset| 0)) (.cse5 (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_node_create_~temp~0#1.base| (store (store (select |c_old(#memory_$Pointer$.base)| |c_node_create_~temp~0#1.base|) |c_node_create_~temp~0#1.offset| 0) .cse9 0)))) (.cse6 (= |c_#NULL.base| 0)) (.cse7 (= |c_#valid| (store |c_old(#valid)| |c_node_create_~temp~0#1.base| 1))) (.cse11 (= (select |c_old(#valid)| |c_node_create_~temp~0#1.base|) 0)) (.cse12 (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_node_create_~temp~0#1.base| (store (store (select |c_old(#memory_$Pointer$.offset)| |c_node_create_~temp~0#1.base|) |c_node_create_~temp~0#1.offset| 0) .cse9 0)))) (.cse13 (= (store |c_old(#length)| |c_node_create_~temp~0#1.base| 12) |c_#length|))) (or (and .cse0 .cse1 .cse2 (exists ((|v_ULTIMATE.start_dll_circular_create_~last~0#1.base_BEFORE_CALL_92| Int)) (let ((.cse3 (select |c_old(#memory_$Pointer$.base)| |v_ULTIMATE.start_dll_circular_create_~last~0#1.base_BEFORE_CALL_92|)) (.cse4 (select |c_old(#memory_$Pointer$.offset)| |v_ULTIMATE.start_dll_circular_create_~last~0#1.base_BEFORE_CALL_92|))) (and (= (select |c_old(#valid)| |v_ULTIMATE.start_dll_circular_create_~last~0#1.base_BEFORE_CALL_92|) 1) (< |v_ULTIMATE.start_dll_circular_create_~last~0#1.base_BEFORE_CALL_92| |c_#StackHeapBarrier|) (= |c_node_create_#in~data#1| (select (select |c_old(#memory_int)| |v_ULTIMATE.start_dll_circular_create_~last~0#1.base_BEFORE_CALL_92|) 8)) (not (= |v_ULTIMATE.start_dll_circular_create_~last~0#1.base_BEFORE_CALL_92| 0)) (= (select |c_old(#length)| |v_ULTIMATE.start_dll_circular_create_~last~0#1.base_BEFORE_CALL_92|) 12) (= (select .cse3 4) 0) (= 0 (select .cse3 0)) (= (select .cse4 4) 0) (= (select .cse4 0) 0)))) .cse5 .cse6 .cse7 (exists ((v_DerPreprocessor_65 Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |c_node_create_~temp~0#1.base| (store (store .cse8 |c_node_create_~temp~0#1.offset| v_DerPreprocessor_65) .cse9 .cse10)))) .cse11 .cse12 .cse13) (let ((.cse14 (select |c_old(#memory_int)| 1))) (and .cse0 (exists ((v_DerPreprocessor_66 Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |c_node_create_~temp~0#1.base| (store (store .cse8 |c_node_create_~temp~0#1.offset| v_DerPreprocessor_66) .cse9 .cse10)))) (= (select |c_old(#length)| 2) 27) .cse1 (= 48 (select .cse14 0)) .cse2 (= (select |c_old(#valid)| 1) 1) .cse5 (= (select |c_old(#valid)| 2) 1) (= (select |c_old(#valid)| 0) 0) .cse6 .cse7 (= (select .cse14 1) 0) .cse11 (= (select |c_old(#length)| 1) 2) .cse12 .cse13))))) (<= (+ 8 |c_node_create_~temp~0#1.offset|) (select |c_#length| |c_node_create_~temp~0#1.base|)) (not (= |c_node_create_~temp~0#1.base| 0)) (= |c_node_create_#in~data#1| |c_node_create_~data#1|) (<= 0 |c_#NULL.base|) (= |c_node_create_~temp~0#1.offset| 0) (<= 1 |c_node_create_#in~data#1|) (= (select |c_#valid| |c_node_create_~temp~0#1.base|) 1) (<= 0 |c_#NULL.offset|) (<= 0 |c_#StackHeapBarrier|) (<= |c_node_create_#in~data#1| 1) (<= |c_#NULL.base| 0) (<= |c_#NULL.offset| 0)) is different from true [2022-11-25 22:38:40,599 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10627#(and (= |ULTIMATE.start_dll_circular_destroy_#in~head#1.offset| |ULTIMATE.start_main_~s~0#1.offset|) (not (= |ULTIMATE.start_dll_circular_destroy_~head#1.base| 0)) (<= 2 |ULTIMATE.start_dll_circular_create_#in~len#1|) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (<= 0 |ULTIMATE.start_dll_circular_destroy_~head#1.offset|) (<= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~data#1| 1) (= |ULTIMATE.start_dll_circular_destroy_~p~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_destroy_~head#1.base|) |ULTIMATE.start_dll_circular_destroy_~head#1.offset|)) (<= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= 1 (select |#valid| |ULTIMATE.start_dll_circular_destroy_~head#1.base|)) (<= (+ |ULTIMATE.start_dll_circular_destroy_~head#1.offset| 4) (select |#length| |ULTIMATE.start_dll_circular_destroy_~head#1.base|)) (or (not (<= 0 |ULTIMATE.start_dll_circular_destroy_~p~0#1.offset|)) (not (<= (+ |ULTIMATE.start_dll_circular_destroy_~p~0#1.offset| 4) (select |#length| |ULTIMATE.start_dll_circular_destroy_~p~0#1.base|)))) (<= (+ |ULTIMATE.start_main_~i~0#1| 1) 0) (= |ULTIMATE.start_dll_circular_destroy_~p~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_destroy_~head#1.base|) |ULTIMATE.start_dll_circular_destroy_~head#1.offset|)) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_dll_circular_destroy_#in~head#1.base| |ULTIMATE.start_main_~s~0#1.base|) (<= 1 |ULTIMATE.start_dll_circular_create_#in~data#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_dll_circular_destroy_~head#1.base| |ULTIMATE.start_dll_circular_destroy_#in~head#1.base|) (<= 0 |ULTIMATE.start_dll_circular_create_#res#1.offset|) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_dll_circular_create_~data#1|) (<= |ULTIMATE.start_dll_circular_create_#res#1.offset| 0) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 2) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= |ULTIMATE.start_dll_circular_create_~data#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |ULTIMATE.start_dll_circular_destroy_~head#1.offset| |ULTIMATE.start_dll_circular_destroy_#in~head#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-25 22:38:40,599 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:38:40,600 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:38:40,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 42 [2022-11-25 22:38:40,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023259315] [2022-11-25 22:38:40,600 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:38:40,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-25 22:38:40,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:38:40,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-25 22:38:40,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=6961, Unknown=13, NotChecked=338, Total=7656 [2022-11-25 22:38:40,603 INFO L87 Difference]: Start difference. First operand 63 states and 69 transitions. Second operand has 43 states, 40 states have (on average 2.0) internal successors, (80), 39 states have internal predecessors, (80), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 22:38:44,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:38:44,925 INFO L93 Difference]: Finished difference Result 71 states and 74 transitions. [2022-11-25 22:38:44,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-25 22:38:44,926 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 40 states have (on average 2.0) internal successors, (80), 39 states have internal predecessors, (80), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 49 [2022-11-25 22:38:44,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:38:44,927 INFO L225 Difference]: With dead ends: 71 [2022-11-25 22:38:44,927 INFO L226 Difference]: Without dead ends: 71 [2022-11-25 22:38:44,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 66 SyntacticMatches, 4 SemanticMatches, 100 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 3139 ImplicationChecksByTransitivity, 27.5s TimeCoverageRelationStatistics Valid=663, Invalid=9232, Unknown=13, NotChecked=394, Total=10302 [2022-11-25 22:38:44,929 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 650 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 1043 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 650 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 1072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:38:44,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [650 Valid, 181 Invalid, 1072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1043 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-25 22:38:44,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-25 22:38:44,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 64. [2022-11-25 22:38:44,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 54 states have (on average 1.2037037037037037) internal successors, (65), 60 states have internal predecessors, (65), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:38:44,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2022-11-25 22:38:44,932 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 49 [2022-11-25 22:38:44,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:38:44,933 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2022-11-25 22:38:44,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 40 states have (on average 2.0) internal successors, (80), 39 states have internal predecessors, (80), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 22:38:44,933 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2022-11-25 22:38:44,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-25 22:38:44,934 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:38:44,934 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:38:44,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-25 22:38:45,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:38:45,143 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-25 22:38:45,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:38:45,144 INFO L85 PathProgramCache]: Analyzing trace with hash 645246949, now seen corresponding path program 1 times [2022-11-25 22:38:45,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:38:45,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615214872] [2022-11-25 22:38:45,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:38:45,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:38:45,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:38:45,477 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 22:38:45,477 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:38:45,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615214872] [2022-11-25 22:38:45,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615214872] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:38:45,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:38:45,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 22:38:45,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896787281] [2022-11-25 22:38:45,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:38:45,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 22:38:45,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:38:45,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 22:38:45,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-25 22:38:45,480 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand has 9 states, 7 states have (on average 5.571428571428571) internal successors, (39), 8 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 22:38:45,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:38:45,937 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2022-11-25 22:38:45,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 22:38:45,938 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 5.571428571428571) internal successors, (39), 8 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 50 [2022-11-25 22:38:45,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:38:45,939 INFO L225 Difference]: With dead ends: 63 [2022-11-25 22:38:45,939 INFO L226 Difference]: Without dead ends: 63 [2022-11-25 22:38:45,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-25 22:38:45,940 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 101 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:38:45,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 82 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 22:38:45,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-25 22:38:45,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-11-25 22:38:45,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 54 states have (on average 1.1666666666666667) internal successors, (63), 59 states have internal predecessors, (63), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:38:45,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2022-11-25 22:38:45,943 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 50 [2022-11-25 22:38:45,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:38:45,944 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2022-11-25 22:38:45,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 5.571428571428571) internal successors, (39), 8 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 22:38:45,944 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2022-11-25 22:38:45,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-25 22:38:45,944 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:38:45,945 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:38:45,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-11-25 22:38:45,946 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-25 22:38:45,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:38:45,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1474377117, now seen corresponding path program 1 times [2022-11-25 22:38:45,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:38:45,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755930106] [2022-11-25 22:38:45,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:38:45,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:38:45,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:38:47,834 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 22:38:47,834 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:38:47,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755930106] [2022-11-25 22:38:47,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755930106] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:38:47,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893895811] [2022-11-25 22:38:47,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:38:47,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:38:47,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:38:47,837 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:38:47,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-25 22:38:48,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:38:48,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 87 conjunts are in the unsatisfiable core [2022-11-25 22:38:48,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:38:48,274 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 [2022-11-25 22:38:48,340 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 5 treesize of output 3 [2022-11-25 22:38:48,388 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 22:38:48,388 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 [2022-11-25 22:38:48,494 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 [2022-11-25 22:38:48,621 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-25 22:38:48,622 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2022-11-25 22:38:48,833 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-25 22:38:48,833 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-11-25 22:38:48,848 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 29 treesize of output 24 [2022-11-25 22:38:49,127 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-25 22:38:49,127 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-11-25 22:38:49,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:38:49,270 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 31 treesize of output 26 [2022-11-25 22:38:49,496 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 13 [2022-11-25 22:38:49,580 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 22:38:49,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:38:50,062 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3875 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_update_at_~head#1.base| v_ArrVal_3875) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) 1) |c_#StackHeapBarrier|)) is different from false [2022-11-25 22:38:50,076 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3875 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_update_at_~head#1.base|) |c_ULTIMATE.start_dll_circular_update_at_~head#1.offset|) v_ArrVal_3875) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) 1) |c_#StackHeapBarrier|)) is different from false [2022-11-25 22:38:50,091 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3875 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) v_ArrVal_3875) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) 1) |c_#StackHeapBarrier|)) is different from false [2022-11-25 22:38:50,610 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:38:50,610 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 68 treesize of output 53 [2022-11-25 22:38:50,617 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 314 treesize of output 286 [2022-11-25 22:38:50,630 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 141 treesize of output 129 [2022-11-25 22:38:50,637 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 270 treesize of output 246 [2022-11-25 22:38:50,643 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 246 treesize of output 230 [2022-11-25 22:38:51,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893895811] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:38:51,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1471981707] [2022-11-25 22:38:51,217 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-25 22:38:51,217 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:38:51,218 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:38:51,218 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:38:51,218 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:38:51,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 22:38:51,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 22:38:51,258 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 15 treesize of output 1 [2022-11-25 22:38:51,266 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 [2022-11-25 22:38:51,272 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 [2022-11-25 22:38:51,280 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 19 treesize of output 1 [2022-11-25 22:38:51,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:38:51,288 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 21 treesize of output 20 [2022-11-25 22:38:51,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:38:51,298 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 21 treesize of output 20 [2022-11-25 22:38:51,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:38:51,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:38:51,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-25 22:38:51,321 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 [2022-11-25 22:38:51,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:38:51,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:38:51,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-25 22:38:51,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 198 [2022-11-25 22:38:51,637 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:38:51,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 22:38:51,664 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 5 treesize of output 3 [2022-11-25 22:38:51,679 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:38:51,694 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 5 treesize of output 3 [2022-11-25 22:38:51,708 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:38:51,711 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:38:51,714 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:38:51,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 198 [2022-11-25 22:38:51,943 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 5 treesize of output 3 [2022-11-25 22:38:51,954 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 5 treesize of output 3 [2022-11-25 22:38:51,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 22:38:51,980 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:38:51,993 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:38:52,006 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:38:52,009 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:38:52,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:38:52,088 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 248 treesize of output 232 [2022-11-25 22:38:52,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:38:52,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:38:52,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:38:52,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:38:52,110 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 246 treesize of output 233 [2022-11-25 22:38:52,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:38:52,130 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:38:52,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:38:52,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:38:52,134 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 240 treesize of output 227 [2022-11-25 22:38:52,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:38:52,226 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 230 treesize of output 208 [2022-11-25 22:38:52,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:38:52,274 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-25 22:38:52,275 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 1 case distinctions, treesize of input 231 treesize of output 231 [2022-11-25 22:38:52,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:38:52,314 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-25 22:38:52,315 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 1 case distinctions, treesize of input 219 treesize of output 215 [2022-11-25 22:38:52,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:38:52,430 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 230 treesize of output 208 [2022-11-25 22:38:52,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:38:52,474 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-25 22:38:52,474 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 1 case distinctions, treesize of input 231 treesize of output 227 [2022-11-25 22:38:52,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:38:52,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:38:52,525 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-25 22:38:52,525 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 1 case distinctions, treesize of input 231 treesize of output 231 [2022-11-25 22:38:52,703 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 [2022-11-25 22:38:52,713 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 [2022-11-25 22:38:52,724 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 [2022-11-25 22:38:52,755 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 19 treesize of output 1 [2022-11-25 22:38:52,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:38:52,772 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 21 treesize of output 20 [2022-11-25 22:38:52,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:38:52,796 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 21 treesize of output 20 [2022-11-25 22:38:52,892 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 19 treesize of output 1 [2022-11-25 22:38:52,905 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 19 treesize of output 1 [2022-11-25 22:38:52,919 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 [2022-11-25 22:38:53,108 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 13 treesize of output 9 [2022-11-25 22:38:53,179 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-25 22:38:53,180 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 259 treesize of output 253 [2022-11-25 22:38:53,248 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-25 22:38:53,249 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 255 treesize of output 249 [2022-11-25 22:38:54,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 198 [2022-11-25 22:38:54,287 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:38:54,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 22:38:54,313 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:38:54,328 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 5 treesize of output 3 [2022-11-25 22:38:54,341 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 5 treesize of output 3 [2022-11-25 22:38:54,355 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:38:54,358 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:38:54,360 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:38:54,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 198 [2022-11-25 22:38:54,571 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:38:54,585 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:38:54,599 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 5 treesize of output 3 [2022-11-25 22:38:54,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 22:38:54,627 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 5 treesize of output 3 [2022-11-25 22:38:54,643 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:38:54,646 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:38:54,648 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:38:54,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:38:54,819 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 248 treesize of output 232 [2022-11-25 22:38:54,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:38:54,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:38:54,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:38:54,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:38:54,843 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 246 treesize of output 233 [2022-11-25 22:38:54,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:38:54,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:38:54,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:38:54,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:38:54,868 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 240 treesize of output 227 [2022-11-25 22:38:54,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 198 [2022-11-25 22:38:55,055 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 80 for LOIs [2022-11-25 22:38:55,396 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:38:58,938 WARN L859 $PredicateComparison]: unable to prove that (and (< |c_node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (let ((.cse2 (+ |c_node_create_~temp~0#1.offset| 4))) (let ((.cse0 (< 0 |c_#StackHeapBarrier|)) (.cse4 (= |c_node_create_#in~data#1| 1)) (.cse1 (select |c_old(#memory_int)| |c_node_create_~temp~0#1.base|)) (.cse3 (select (select |c_#memory_int| |c_node_create_~temp~0#1.base|) .cse2)) (.cse6 (= |c_#NULL.offset| 0)) (.cse7 (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_node_create_~temp~0#1.base| (store (store (select |c_old(#memory_$Pointer$.base)| |c_node_create_~temp~0#1.base|) |c_node_create_~temp~0#1.offset| 0) .cse2 0)))) (.cse8 (= |c_#NULL.base| 0)) (.cse9 (= |c_#valid| (store |c_old(#valid)| |c_node_create_~temp~0#1.base| 1))) (.cse10 (= (select |c_old(#valid)| |c_node_create_~temp~0#1.base|) 0)) (.cse11 (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_node_create_~temp~0#1.base| (store (store (select |c_old(#memory_$Pointer$.offset)| |c_node_create_~temp~0#1.base|) |c_node_create_~temp~0#1.offset| 0) .cse2 0)))) (.cse12 (= (store |c_old(#length)| |c_node_create_~temp~0#1.base| 12) |c_#length|))) (or (let ((.cse5 (select |c_old(#memory_int)| 1))) (and .cse0 (exists ((v_DerPreprocessor_70 Int)) (= (store |c_old(#memory_int)| |c_node_create_~temp~0#1.base| (store (store .cse1 |c_node_create_~temp~0#1.offset| v_DerPreprocessor_70) .cse2 .cse3)) |c_#memory_int|)) (= (select |c_old(#length)| 2) 27) .cse4 (= 48 (select .cse5 0)) .cse6 (= (select |c_old(#valid)| 1) 1) .cse7 (= (select |c_old(#valid)| 2) 1) (= (select |c_old(#valid)| 0) 0) .cse8 .cse9 (= (select .cse5 1) 0) .cse10 (= (select |c_old(#length)| 1) 2) .cse11 .cse12)) (and .cse0 .cse4 (exists ((v_DerPreprocessor_69 Int)) (= (store |c_old(#memory_int)| |c_node_create_~temp~0#1.base| (store (store .cse1 |c_node_create_~temp~0#1.offset| v_DerPreprocessor_69) .cse2 .cse3)) |c_#memory_int|)) .cse6 .cse7 (exists ((|v_ULTIMATE.start_dll_circular_create_~last~0#1.base_BEFORE_CALL_98| Int)) (let ((.cse14 (select |c_old(#memory_$Pointer$.base)| |v_ULTIMATE.start_dll_circular_create_~last~0#1.base_BEFORE_CALL_98|)) (.cse13 (select |c_old(#memory_$Pointer$.offset)| |v_ULTIMATE.start_dll_circular_create_~last~0#1.base_BEFORE_CALL_98|))) (and (= (select .cse13 0) 0) (= 0 (select .cse14 0)) (= (select |c_old(#length)| |v_ULTIMATE.start_dll_circular_create_~last~0#1.base_BEFORE_CALL_98|) 12) (= |c_node_create_#in~data#1| (select (select |c_old(#memory_int)| |v_ULTIMATE.start_dll_circular_create_~last~0#1.base_BEFORE_CALL_98|) 8)) (= (select |c_old(#valid)| |v_ULTIMATE.start_dll_circular_create_~last~0#1.base_BEFORE_CALL_98|) 1) (< |v_ULTIMATE.start_dll_circular_create_~last~0#1.base_BEFORE_CALL_98| |c_#StackHeapBarrier|) (= (select .cse14 4) 0) (= (select .cse13 4) 0) (not (= |v_ULTIMATE.start_dll_circular_create_~last~0#1.base_BEFORE_CALL_98| 0))))) .cse8 .cse9 .cse10 .cse11 .cse12)))) (<= (+ 8 |c_node_create_~temp~0#1.offset|) (select |c_#length| |c_node_create_~temp~0#1.base|)) (not (= |c_node_create_~temp~0#1.base| 0)) (= |c_node_create_#in~data#1| |c_node_create_~data#1|) (<= 0 |c_#NULL.base|) (= |c_node_create_~temp~0#1.offset| 0) (<= 1 |c_node_create_#in~data#1|) (= (select |c_#valid| |c_node_create_~temp~0#1.base|) 1) (<= 0 |c_#NULL.offset|) (<= 0 |c_#StackHeapBarrier|) (<= |c_node_create_#in~data#1| 1) (<= |c_#NULL.base| 0) (<= |c_#NULL.offset| 0)) is different from true [2022-11-25 22:39:17,601 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11261#(and (= |ULTIMATE.start_dll_circular_destroy_#in~head#1.offset| |ULTIMATE.start_main_~s~0#1.offset|) (not (= |ULTIMATE.start_dll_circular_destroy_~head#1.base| 0)) (= |ULTIMATE.start_dll_circular_destroy_~q~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_destroy_~p~0#1.base|) |ULTIMATE.start_dll_circular_destroy_~p~0#1.offset|)) (<= 2 |ULTIMATE.start_dll_circular_create_#in~len#1|) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (<= 0 |ULTIMATE.start_dll_circular_destroy_~head#1.offset|) (<= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~data#1| 1) (= |ULTIMATE.start_dll_circular_destroy_~p~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_destroy_~head#1.base|) |ULTIMATE.start_dll_circular_destroy_~head#1.offset|)) (<= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= 1 (select |#valid| |ULTIMATE.start_dll_circular_destroy_~head#1.base|)) (not (= |ULTIMATE.start_dll_circular_destroy_~head#1.base| |ULTIMATE.start_dll_circular_destroy_~p~0#1.base|)) (<= (+ |ULTIMATE.start_dll_circular_destroy_~head#1.offset| 4) (select |#length| |ULTIMATE.start_dll_circular_destroy_~head#1.base|)) (= |ULTIMATE.start_dll_circular_destroy_~q~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_destroy_~p~0#1.base|) |ULTIMATE.start_dll_circular_destroy_~p~0#1.offset|)) (<= (+ |ULTIMATE.start_main_~i~0#1| 1) 0) (= |ULTIMATE.start_dll_circular_destroy_~p~0#1.offset| 0) (= |ULTIMATE.start_dll_circular_destroy_~p~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_destroy_~head#1.base|) |ULTIMATE.start_dll_circular_destroy_~head#1.offset|)) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_dll_circular_destroy_#in~head#1.base| |ULTIMATE.start_main_~s~0#1.base|) (<= 1 |ULTIMATE.start_dll_circular_create_#in~data#1|) (not (< |ULTIMATE.start_dll_circular_destroy_~p~0#1.base| |#StackHeapBarrier|)) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_dll_circular_destroy_~head#1.base| |ULTIMATE.start_dll_circular_destroy_#in~head#1.base|) (<= 0 |ULTIMATE.start_dll_circular_create_#res#1.offset|) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_dll_circular_create_~data#1|) (= (select |#valid| |ULTIMATE.start_dll_circular_destroy_~p~0#1.base|) 1) (<= |ULTIMATE.start_dll_circular_create_#res#1.offset| 0) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 2) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= |ULTIMATE.start_dll_circular_create_~data#1| 1) (<= (+ |ULTIMATE.start_dll_circular_destroy_~p~0#1.offset| 4) (select |#length| |ULTIMATE.start_dll_circular_destroy_~p~0#1.base|)) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |ULTIMATE.start_dll_circular_destroy_~head#1.offset| |ULTIMATE.start_dll_circular_destroy_#in~head#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-25 22:39:17,601 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:39:17,602 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:39:17,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 32 [2022-11-25 22:39:17,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700848785] [2022-11-25 22:39:17,602 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:39:17,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-25 22:39:17,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:39:17,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-25 22:39:17,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=4670, Unknown=7, NotChecked=564, Total=5550 [2022-11-25 22:39:17,605 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand has 33 states, 30 states have (on average 2.433333333333333) internal successors, (73), 30 states have internal predecessors, (73), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:39:19,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:39:19,888 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2022-11-25 22:39:19,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-25 22:39:19,889 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 2.433333333333333) internal successors, (73), 30 states have internal predecessors, (73), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 51 [2022-11-25 22:39:19,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:39:19,889 INFO L225 Difference]: With dead ends: 68 [2022-11-25 22:39:19,890 INFO L226 Difference]: Without dead ends: 68 [2022-11-25 22:39:19,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 80 SyntacticMatches, 6 SemanticMatches, 83 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1885 ImplicationChecksByTransitivity, 25.9s TimeCoverageRelationStatistics Valid=445, Invalid=6044, Unknown=7, NotChecked=644, Total=7140 [2022-11-25 22:39:19,891 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 161 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 852 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:39:19,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 155 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 852 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-25 22:39:19,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-25 22:39:19,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2022-11-25 22:39:19,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 60 states have internal predecessors, (64), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:39:19,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2022-11-25 22:39:19,893 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 51 [2022-11-25 22:39:19,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:39:19,893 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2022-11-25 22:39:19,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 2.433333333333333) internal successors, (73), 30 states have internal predecessors, (73), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:39:19,894 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2022-11-25 22:39:19,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-25 22:39:19,894 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:39:19,895 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:39:19,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-25 22:39:20,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-25 22:39:20,095 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-25 22:39:20,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:39:20,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1721579370, now seen corresponding path program 1 times [2022-11-25 22:39:20,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:39:20,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162811749] [2022-11-25 22:39:20,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:39:20,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:39:20,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:39:21,591 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 22:39:21,591 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:39:21,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162811749] [2022-11-25 22:39:21,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162811749] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:39:21,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522723070] [2022-11-25 22:39:21,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:39:21,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:39:21,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:39:21,593 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:39:21,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-25 22:39:22,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:39:22,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-25 22:39:22,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:39:22,050 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 [2022-11-25 22:39:22,148 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 22:39:22,149 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 [2022-11-25 22:39:22,223 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 [2022-11-25 22:39:22,333 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-25 22:39:22,333 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-11-25 22:39:22,496 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-25 22:39:22,497 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 22 treesize of output 22 [2022-11-25 22:39:22,511 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 24 treesize of output 19 [2022-11-25 22:39:22,803 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-25 22:39:22,804 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-11-25 22:39:22,916 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:39:22,917 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 1 case distinctions, treesize of input 31 treesize of output 29 [2022-11-25 22:39:23,183 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:39:23,184 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 27 treesize of output 27 [2022-11-25 22:39:23,378 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 22:39:23,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:39:24,660 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4040 Int) (v_ArrVal_4039 (Array Int Int)) (|ULTIMATE.start_dll_circular_destroy_~head#1.offset| Int)) (or (not (<= |ULTIMATE.start_dll_circular_destroy_~head#1.offset| 0)) (not (= (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) v_ArrVal_4039) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 8) v_ArrVal_4040) |ULTIMATE.start_dll_circular_destroy_~head#1.offset|) |c_ULTIMATE.start_main_~s~0#1.base|)) (not (<= 0 |ULTIMATE.start_dll_circular_destroy_~head#1.offset|)))) is different from false [2022-11-25 22:39:24,682 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4040 Int) (v_ArrVal_4039 (Array Int Int)) (|ULTIMATE.start_dll_circular_destroy_~head#1.offset| Int)) (or (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (select (store (select (let ((.cse0 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|))) (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (store .cse0 (+ 4 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (select .cse0 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) v_ArrVal_4039)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ 8 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) v_ArrVal_4040) |ULTIMATE.start_dll_circular_destroy_~head#1.offset|))) (not (<= |ULTIMATE.start_dll_circular_destroy_~head#1.offset| 0)) (not (<= 0 |ULTIMATE.start_dll_circular_destroy_~head#1.offset|)))) is different from false [2022-11-25 22:39:24,705 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4040 Int) (v_ArrVal_4036 (Array Int Int)) (v_ArrVal_4039 (Array Int Int)) (|ULTIMATE.start_dll_circular_destroy_~head#1.offset| Int)) (or (not (= (select (store (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| v_ArrVal_4036))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|))) (store (store .cse0 |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (store .cse1 (+ 4 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (select .cse1 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) v_ArrVal_4039))) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ 8 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) v_ArrVal_4040) |ULTIMATE.start_dll_circular_destroy_~head#1.offset|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) (not (<= |ULTIMATE.start_dll_circular_destroy_~head#1.offset| 0)) (not (<= 0 |ULTIMATE.start_dll_circular_destroy_~head#1.offset|)))) is different from false [2022-11-25 22:39:24,986 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4040 Int) (v_ArrVal_4035 (Array Int Int)) (v_ArrVal_4036 (Array Int Int)) (v_ArrVal_4039 (Array Int Int)) (|ULTIMATE.start_dll_circular_destroy_~head#1.offset| Int)) (or (not (= (select (store (select (let ((.cse0 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| v_ArrVal_4035) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| v_ArrVal_4036))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|))) (store (store .cse0 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base| (store .cse1 (+ |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (select .cse1 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) v_ArrVal_4039))) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 8) v_ArrVal_4040) |ULTIMATE.start_dll_circular_destroy_~head#1.offset|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)) (not (<= |ULTIMATE.start_dll_circular_destroy_~head#1.offset| 0)) (not (<= 0 |ULTIMATE.start_dll_circular_destroy_~head#1.offset|)))) is different from false [2022-11-25 22:39:25,021 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:39:25,021 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 72 treesize of output 57 [2022-11-25 22:39:25,028 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 209 treesize of output 201 [2022-11-25 22:39:25,039 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 246 treesize of output 238 [2022-11-25 22:39:25,066 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:39:25,066 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 356 treesize of output 357 [2022-11-25 22:39:25,096 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:39:25,097 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 436 treesize of output 433 [2022-11-25 22:39:25,127 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:39:25,127 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 475 treesize of output 475 [2022-11-25 22:39:27,239 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 3 not checked. [2022-11-25 22:39:27,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522723070] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:39:27,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [990956837] [2022-11-25 22:39:27,240 INFO L159 IcfgInterpreter]: Started Sifa with 36 locations of interest [2022-11-25 22:39:27,241 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:39:27,241 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:39:27,241 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:39:27,242 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:39:27,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 22:39:27,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 22:39:27,282 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 [2022-11-25 22:39:27,289 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 [2022-11-25 22:39:27,296 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 15 treesize of output 1 [2022-11-25 22:39:27,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:39:27,307 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 21 treesize of output 20 [2022-11-25 22:39:27,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:39:27,316 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 21 treesize of output 20 [2022-11-25 22:39:27,325 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 19 treesize of output 1 [2022-11-25 22:39:27,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:39:27,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:39:27,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-25 22:39:27,348 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 [2022-11-25 22:39:27,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:39:27,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:39:27,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-25 22:39:27,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 198 [2022-11-25 22:39:27,612 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 13 treesize of output 9 [2022-11-25 22:39:27,625 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 5 treesize of output 3 [2022-11-25 22:39:27,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:39:27,640 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 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-25 22:39:27,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-25 22:39:27,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:39:27,670 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 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-25 22:39:27,686 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:39:27,688 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:39:27,689 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:39:27,692 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:39:27,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 198 [2022-11-25 22:39:27,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-25 22:39:27,894 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 5 treesize of output 3 [2022-11-25 22:39:27,907 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 13 treesize of output 9 [2022-11-25 22:39:27,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:39:27,922 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 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-25 22:39:27,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:39:27,938 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 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-25 22:39:27,951 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:39:27,954 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:39:27,957 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:39:28,003 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 21 [2022-11-25 22:39:28,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-25 22:39:28,033 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 23 treesize of output 11 [2022-11-25 22:39:28,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:39:28,095 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 22:39:28,096 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 1 case distinctions, treesize of input 28 treesize of output 34 [2022-11-25 22:39:28,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:39:28,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-25 22:39:28,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:39:28,155 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 22:39:28,155 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 1 case distinctions, treesize of input 28 treesize of output 30 [2022-11-25 22:39:28,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:39:28,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-25 22:39:28,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:39:28,240 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 22:39:28,240 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 1 case distinctions, treesize of input 28 treesize of output 34 [2022-11-25 22:39:28,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:39:28,281 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 22:39:28,281 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 1 case distinctions, treesize of input 28 treesize of output 30 [2022-11-25 22:39:28,352 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 [2022-11-25 22:39:28,367 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 [2022-11-25 22:39:28,379 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 [2022-11-25 22:39:28,413 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 19 treesize of output 1 [2022-11-25 22:39:28,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:39:28,431 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 21 treesize of output 20 [2022-11-25 22:39:28,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:39:28,452 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 21 treesize of output 20 [2022-11-25 22:39:28,563 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 19 treesize of output 1 [2022-11-25 22:39:28,584 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 19 treesize of output 1 [2022-11-25 22:39:28,601 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 [2022-11-25 22:39:28,815 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 [2022-11-25 22:39:28,887 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-25 22:39:28,888 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 257 treesize of output 251 [2022-11-25 22:39:28,958 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-25 22:39:28,959 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 253 treesize of output 247 [2022-11-25 22:39:29,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 22:39:29,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 198 [2022-11-25 22:39:29,882 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:39:29,894 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 5 treesize of output 3 [2022-11-25 22:39:29,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-25 22:39:29,919 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 5 treesize of output 3 [2022-11-25 22:39:29,932 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 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 22:39:29,946 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:39:29,949 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:39:29,950 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:39:30,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 198 [2022-11-25 22:39:30,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-25 22:39:30,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:39:30,180 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 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-25 22:39:30,193 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 13 treesize of output 9 [2022-11-25 22:39:30,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:39:30,208 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 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-25 22:39:30,222 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 5 treesize of output 3 [2022-11-25 22:39:30,237 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:39:30,239 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:39:30,241 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:39:30,243 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:39:30,311 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 21 [2022-11-25 22:39:30,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-25 22:39:30,345 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 23 treesize of output 11 [2022-11-25 22:39:30,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 198 [2022-11-25 22:39:30,507 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 80 for LOIs [2022-11-25 22:39:30,848 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:39:55,714 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11811#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (not (= |ULTIMATE.start_dll_circular_destroy_~head#1.base| 0)) (<= 2 |ULTIMATE.start_dll_circular_create_#in~len#1|) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (<= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~data#1| 1) (= |ULTIMATE.start_dll_circular_destroy_~p~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_destroy_~head#1.base|) |ULTIMATE.start_dll_circular_destroy_~head#1.offset|)) (<= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= |ULTIMATE.start_dll_circular_destroy_~head#1.base| |ULTIMATE.start_dll_circular_destroy_~p~0#1.base|) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (<= (+ |ULTIMATE.start_dll_circular_destroy_~head#1.offset| 4) (select |#length| |ULTIMATE.start_dll_circular_destroy_~head#1.base|)) (= |ULTIMATE.start_dll_circular_destroy_~head#1.offset| 0) (= 0 (select |#valid| |ULTIMATE.start_dll_circular_destroy_~head#1.base|)) (<= (+ |ULTIMATE.start_main_~i~0#1| 1) 0) (< |ULTIMATE.start_dll_circular_destroy_~head#1.base| |#StackHeapBarrier|) (= |ULTIMATE.start_dll_circular_destroy_~p~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_destroy_~head#1.base|) |ULTIMATE.start_dll_circular_destroy_~head#1.offset|)) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_dll_circular_destroy_#in~head#1.base| |ULTIMATE.start_main_~s~0#1.base|) (= |ULTIMATE.start_dll_circular_destroy_~p~0#1.offset| |ULTIMATE.start_dll_circular_destroy_~head#1.offset|) (<= 1 |ULTIMATE.start_dll_circular_create_#in~data#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_dll_circular_destroy_~head#1.base| |ULTIMATE.start_dll_circular_destroy_#in~head#1.base|) (<= 0 |ULTIMATE.start_dll_circular_create_#res#1.offset|) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_dll_circular_create_~data#1|) (<= |ULTIMATE.start_dll_circular_create_#res#1.offset| 0) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 2) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= |ULTIMATE.start_dll_circular_create_~data#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |ULTIMATE.start_dll_circular_destroy_~head#1.offset| |ULTIMATE.start_dll_circular_destroy_#in~head#1.offset|) (= |ULTIMATE.start_main_#res#1| 0) (= |#NULL.base| 0))' at error location [2022-11-25 22:39:55,714 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:39:55,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:39:55,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 24] total 56 [2022-11-25 22:39:55,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389323932] [2022-11-25 22:39:55,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:39:55,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-25 22:39:55,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:39:55,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-25 22:39:55,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=6379, Unknown=77, NotChecked=660, Total=7482 [2022-11-25 22:39:55,717 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand has 56 states, 52 states have (on average 2.230769230769231) internal successors, (116), 50 states have internal predecessors, (116), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-25 22:39:59,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:39:59,110 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2022-11-25 22:39:59,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-25 22:39:59,111 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 52 states have (on average 2.230769230769231) internal successors, (116), 50 states have internal predecessors, (116), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 53 [2022-11-25 22:39:59,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:39:59,112 INFO L225 Difference]: With dead ends: 62 [2022-11-25 22:39:59,112 INFO L226 Difference]: Without dead ends: 62 [2022-11-25 22:39:59,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 2679 ImplicationChecksByTransitivity, 30.2s TimeCoverageRelationStatistics Valid=530, Invalid=8337, Unknown=79, NotChecked=756, Total=9702 [2022-11-25 22:39:59,113 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 257 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 958 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 1197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 222 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-25 22:39:59,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 262 Invalid, 1197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 958 Invalid, 0 Unknown, 222 Unchecked, 1.8s Time] [2022-11-25 22:39:59,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-25 22:39:59,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2022-11-25 22:39:59,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 57 states have internal predecessors, (60), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:39:59,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2022-11-25 22:39:59,116 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 53 [2022-11-25 22:39:59,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:39:59,117 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2022-11-25 22:39:59,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 52 states have (on average 2.230769230769231) internal successors, (116), 50 states have internal predecessors, (116), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-25 22:39:59,117 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2022-11-25 22:39:59,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-25 22:39:59,118 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:39:59,118 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:39:59,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-25 22:39:59,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-25 22:39:59,329 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-25 22:39:59,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:39:59,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1462014124, now seen corresponding path program 1 times [2022-11-25 22:39:59,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:39:59,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049366081] [2022-11-25 22:39:59,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:39:59,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:39:59,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:40:01,930 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 22:40:01,931 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:40:01,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049366081] [2022-11-25 22:40:01,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049366081] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:40:01,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273203154] [2022-11-25 22:40:01,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:40:01,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:40:01,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:40:01,932 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:40:01,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea7e72d4-94be-47ef-acc1-e8f7f34bdd02/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-25 22:40:02,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:40:02,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 124 conjunts are in the unsatisfiable core [2022-11-25 22:40:02,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:40:02,389 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 [2022-11-25 22:40:02,536 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 22:40:02,537 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 [2022-11-25 22:40:02,580 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 [2022-11-25 22:40:02,589 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 [2022-11-25 22:40:02,730 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 [2022-11-25 22:40:02,739 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 [2022-11-25 22:40:02,989 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 22:40:02,990 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 33 [2022-11-25 22:40:02,995 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 27 treesize of output 22 [2022-11-25 22:40:03,151 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-25 22:40:03,152 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 42 treesize of output 39 [2022-11-25 22:40:03,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-11-25 22:40:03,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:40:03,613 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-25 22:40:03,614 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 2 case distinctions, treesize of input 73 treesize of output 57 [2022-11-25 22:40:03,643 INFO L321 Elim1Store]: treesize reduction 25, result has 30.6 percent of original size [2022-11-25 22:40:03,643 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 41 [2022-11-25 22:40:03,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:40:03,921 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-25 22:40:03,921 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 41 [2022-11-25 22:40:03,927 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 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 22:40:04,489 INFO L321 Elim1Store]: treesize reduction 44, result has 21.4 percent of original size [2022-11-25 22:40:04,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 42 [2022-11-25 22:40:04,512 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:40:04,512 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 15 treesize of output 15 [2022-11-25 22:40:04,837 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 22:40:04,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:40:41,447 WARN L233 SmtUtils]: Spent 9.41s on a formula simplification that was a NOOP. DAG size: 61 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:40:42,440 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse4 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_update_at_~head#1.base|) |c_ULTIMATE.start_dll_circular_update_at_~head#1.offset|))) (let ((.cse9 (select |c_#memory_$Pointer$.offset| .cse4)) (.cse5 (select |c_#memory_$Pointer$.base| .cse4)) (.cse0 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_update_at_~head#1.base|) |c_ULTIMATE.start_dll_circular_update_at_~head#1.offset|))) (and (forall ((|v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_130| Int)) (or (not (<= .cse0 |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_130|)) (forall ((|v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_129| Int) (v_ArrVal_4215 Int)) (or (< |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_129| |c_ULTIMATE.start_main_~s~0#1.offset|) (forall ((v_ArrVal_4216 Int)) (let ((.cse1 (store |c_#memory_$Pointer$.base| .cse4 (store .cse5 (+ 8 |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_130|) v_ArrVal_4215)))) (let ((.cse2 (store (select .cse1 |c_ULTIMATE.start_main_~s~0#1.base|) (+ 8 |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_129|) v_ArrVal_4216))) (let ((.cse3 (select .cse2 |c_ULTIMATE.start_main_~s~0#1.offset|))) (or (forall ((|ULTIMATE.start_dll_circular_destroy_~p~0#1.offset| Int)) (or (not (<= 0 |ULTIMATE.start_dll_circular_destroy_~p~0#1.offset|)) (not (<= |ULTIMATE.start_dll_circular_destroy_~p~0#1.offset| 0)) (= (select (select (store .cse1 |c_ULTIMATE.start_main_~s~0#1.base| .cse2) .cse3) |ULTIMATE.start_dll_circular_destroy_~p~0#1.offset|) |c_ULTIMATE.start_main_~s~0#1.base|))) (= |c_ULTIMATE.start_main_~s~0#1.base| .cse3)))))))))) (forall ((|v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_130| Int)) (or (forall ((|v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_129| Int) (v_ArrVal_4215 Int)) (or (forall ((v_ArrVal_4216 Int) (|ULTIMATE.start_dll_circular_destroy_~p~0#1.offset| Int)) (or (= |ULTIMATE.start_dll_circular_destroy_~p~0#1.offset| |c_ULTIMATE.start_main_~s~0#1.offset|) (not (<= 0 |ULTIMATE.start_dll_circular_destroy_~p~0#1.offset|)) (not (<= |ULTIMATE.start_dll_circular_destroy_~p~0#1.offset| 0)) (= (select (let ((.cse6 (store |c_#memory_$Pointer$.base| .cse4 (store .cse5 (+ 8 |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_130|) v_ArrVal_4215)))) (let ((.cse7 (store (select .cse6 |c_ULTIMATE.start_main_~s~0#1.base|) (+ 8 |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_129|) v_ArrVal_4216))) (select (store .cse6 |c_ULTIMATE.start_main_~s~0#1.base| .cse7) (select .cse7 |c_ULTIMATE.start_main_~s~0#1.offset|)))) |ULTIMATE.start_dll_circular_destroy_~p~0#1.offset|) |c_ULTIMATE.start_main_~s~0#1.base|))) (< |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_129| |c_ULTIMATE.start_main_~s~0#1.offset|))) (not (<= .cse0 |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_130|)))) (forall ((|v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_130| Int)) (or (forall ((|v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_129| Int) (v_ArrVal_4215 Int) (v_ArrVal_4213 Int)) (or (forall ((v_ArrVal_4216 Int)) (let ((.cse10 (+ 8 |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_130|))) (let ((.cse8 (select (store (select (store |c_#memory_$Pointer$.base| .cse4 (store .cse5 .cse10 v_ArrVal_4215)) |c_ULTIMATE.start_main_~s~0#1.base|) (+ 8 |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_129|) v_ArrVal_4216) |c_ULTIMATE.start_main_~s~0#1.offset|))) (or (= |c_ULTIMATE.start_main_~s~0#1.base| .cse8) (forall ((v_ArrVal_4217 (Array Int Int)) (|ULTIMATE.start_dll_circular_destroy_~p~0#1.offset| Int)) (or (= |c_ULTIMATE.start_main_~s~0#1.offset| (select (select (store (store |c_#memory_$Pointer$.offset| .cse4 (store .cse9 .cse10 v_ArrVal_4213)) |c_ULTIMATE.start_main_~s~0#1.base| v_ArrVal_4217) .cse8) |ULTIMATE.start_dll_circular_destroy_~p~0#1.offset|)) (not (<= 0 |ULTIMATE.start_dll_circular_destroy_~p~0#1.offset|)) (not (<= |ULTIMATE.start_dll_circular_destroy_~p~0#1.offset| 0)))))))) (< |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_129| |c_ULTIMATE.start_main_~s~0#1.offset|))) (not (<= .cse0 |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_130|)))) (forall ((|v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_130| Int)) (or (forall ((|v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_129| Int) (v_ArrVal_4215 Int) (v_ArrVal_4213 Int)) (or (forall ((v_ArrVal_4216 Int) (v_ArrVal_4217 (Array Int Int)) (|ULTIMATE.start_dll_circular_destroy_~p~0#1.offset| Int)) (or (= |ULTIMATE.start_dll_circular_destroy_~p~0#1.offset| |c_ULTIMATE.start_main_~s~0#1.offset|) (= |c_ULTIMATE.start_main_~s~0#1.offset| (select (let ((.cse11 (+ 8 |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_130|))) (select (store (store |c_#memory_$Pointer$.offset| .cse4 (store .cse9 .cse11 v_ArrVal_4213)) |c_ULTIMATE.start_main_~s~0#1.base| v_ArrVal_4217) (select (store (select (store |c_#memory_$Pointer$.base| .cse4 (store .cse5 .cse11 v_ArrVal_4215)) |c_ULTIMATE.start_main_~s~0#1.base|) (+ 8 |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_129|) v_ArrVal_4216) |c_ULTIMATE.start_main_~s~0#1.offset|))) |ULTIMATE.start_dll_circular_destroy_~p~0#1.offset|)) (not (<= 0 |ULTIMATE.start_dll_circular_destroy_~p~0#1.offset|)) (not (<= |ULTIMATE.start_dll_circular_destroy_~p~0#1.offset| 0)))) (< |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_129| |c_ULTIMATE.start_main_~s~0#1.offset|))) (not (<= .cse0 |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_130|))))))) is different from false [2022-11-25 22:40:44,818 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) (let ((.cse1 (select |c_#memory_$Pointer$.offset| .cse0)) (.cse4 (select |c_#memory_$Pointer$.base| .cse0)) (.cse5 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) (and (forall ((|v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_130| Int)) (or (forall ((|v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_129| Int) (v_ArrVal_4215 Int) (v_ArrVal_4213 Int)) (or (forall ((v_ArrVal_4216 Int)) (let ((.cse2 (+ 8 |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_130|))) (let ((.cse3 (select (store (select (store |c_#memory_$Pointer$.base| .cse0 (store .cse4 .cse2 v_ArrVal_4215)) |c_ULTIMATE.start_main_~s~0#1.base|) (+ 8 |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_129|) v_ArrVal_4216) |c_ULTIMATE.start_main_~s~0#1.offset|))) (or (forall ((v_ArrVal_4217 (Array Int Int)) (|ULTIMATE.start_dll_circular_destroy_~p~0#1.offset| Int)) (or (not (<= 0 |ULTIMATE.start_dll_circular_destroy_~p~0#1.offset|)) (not (<= |ULTIMATE.start_dll_circular_destroy_~p~0#1.offset| 0)) (= |c_ULTIMATE.start_main_~s~0#1.offset| (select (select (store (store |c_#memory_$Pointer$.offset| .cse0 (store .cse1 .cse2 v_ArrVal_4213)) |c_ULTIMATE.start_main_~s~0#1.base| v_ArrVal_4217) .cse3) |ULTIMATE.start_dll_circular_destroy_~p~0#1.offset|)))) (= |c_ULTIMATE.start_main_~s~0#1.base| .cse3))))) (< |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_129| |c_ULTIMATE.start_main_~s~0#1.offset|))) (not (<= .cse5 |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_130|)))) (forall ((|v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_130| Int)) (or (forall ((|v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_129| Int) (v_ArrVal_4215 Int)) (or (forall ((v_ArrVal_4216 Int) (|ULTIMATE.start_dll_circular_destroy_~p~0#1.offset| Int)) (or (= |ULTIMATE.start_dll_circular_destroy_~p~0#1.offset| |c_ULTIMATE.start_main_~s~0#1.offset|) (not (<= 0 |ULTIMATE.start_dll_circular_destroy_~p~0#1.offset|)) (not (<= |ULTIMATE.start_dll_circular_destroy_~p~0#1.offset| 0)) (= |c_ULTIMATE.start_main_~s~0#1.base| (select (let ((.cse6 (store |c_#memory_$Pointer$.base| .cse0 (store .cse4 (+ 8 |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_130|) v_ArrVal_4215)))) (let ((.cse7 (store (select .cse6 |c_ULTIMATE.start_main_~s~0#1.base|) (+ 8 |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_129|) v_ArrVal_4216))) (select (store .cse6 |c_ULTIMATE.start_main_~s~0#1.base| .cse7) (select .cse7 |c_ULTIMATE.start_main_~s~0#1.offset|)))) |ULTIMATE.start_dll_circular_destroy_~p~0#1.offset|)))) (< |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_129| |c_ULTIMATE.start_main_~s~0#1.offset|))) (not (<= .cse5 |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_130|)))) (forall ((|v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_130| Int)) (or (not (<= .cse5 |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_130|)) (forall ((|v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_129| Int) (v_ArrVal_4215 Int)) (or (forall ((v_ArrVal_4216 Int)) (let ((.cse8 (store |c_#memory_$Pointer$.base| .cse0 (store .cse4 (+ 8 |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_130|) v_ArrVal_4215)))) (let ((.cse9 (store (select .cse8 |c_ULTIMATE.start_main_~s~0#1.base|) (+ 8 |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_129|) v_ArrVal_4216))) (let ((.cse10 (select .cse9 |c_ULTIMATE.start_main_~s~0#1.offset|))) (or (forall ((|ULTIMATE.start_dll_circular_destroy_~p~0#1.offset| Int)) (or (not (<= 0 |ULTIMATE.start_dll_circular_destroy_~p~0#1.offset|)) (not (<= |ULTIMATE.start_dll_circular_destroy_~p~0#1.offset| 0)) (= |c_ULTIMATE.start_main_~s~0#1.base| (select (select (store .cse8 |c_ULTIMATE.start_main_~s~0#1.base| .cse9) .cse10) |ULTIMATE.start_dll_circular_destroy_~p~0#1.offset|)))) (= |c_ULTIMATE.start_main_~s~0#1.base| .cse10)))))) (< |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_129| |c_ULTIMATE.start_main_~s~0#1.offset|))))) (forall ((|v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_130| Int)) (or (forall ((|v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_129| Int) (v_ArrVal_4215 Int) (v_ArrVal_4213 Int)) (or (forall ((v_ArrVal_4216 Int) (v_ArrVal_4217 (Array Int Int)) (|ULTIMATE.start_dll_circular_destroy_~p~0#1.offset| Int)) (or (= |ULTIMATE.start_dll_circular_destroy_~p~0#1.offset| |c_ULTIMATE.start_main_~s~0#1.offset|) (not (<= 0 |ULTIMATE.start_dll_circular_destroy_~p~0#1.offset|)) (not (<= |ULTIMATE.start_dll_circular_destroy_~p~0#1.offset| 0)) (= |c_ULTIMATE.start_main_~s~0#1.offset| (select (let ((.cse11 (+ 8 |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_130|))) (select (store (store |c_#memory_$Pointer$.offset| .cse0 (store .cse1 .cse11 v_ArrVal_4213)) |c_ULTIMATE.start_main_~s~0#1.base| v_ArrVal_4217) (select (store (select (store |c_#memory_$Pointer$.base| .cse0 (store .cse4 .cse11 v_ArrVal_4215)) |c_ULTIMATE.start_main_~s~0#1.base|) (+ 8 |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_129|) v_ArrVal_4216) |c_ULTIMATE.start_main_~s~0#1.offset|))) |ULTIMATE.start_dll_circular_destroy_~p~0#1.offset|)))) (< |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_129| |c_ULTIMATE.start_main_~s~0#1.offset|))) (not (<= .cse5 |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_130|))))))) is different from false [2022-11-25 22:41:01,071 WARN L233 SmtUtils]: Spent 12.99s on a formula simplification that was a NOOP. DAG size: 85 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:41:25,771 WARN L233 SmtUtils]: Spent 17.68s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:41:49,596 WARN L233 SmtUtils]: Spent 17.95s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:42:13,073 WARN L233 SmtUtils]: Spent 8.33s on a formula simplification that was a NOOP. DAG size: 100 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:42:14,224 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:42:14,225 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 2937 treesize of output 2754 [2022-11-25 22:45:18,335 WARN L233 SmtUtils]: Spent 3.04m on a formula simplification that was a NOOP. DAG size: 123 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-25 22:45:18,336 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:45:18,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 1689927286 treesize of output 1662501486