./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext2/split_list_test05-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8393723b 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_e2002248-72d5-42f5-8a57-a7307c819f2f/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2002248-72d5-42f5-8a57-a7307c819f2f/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2002248-72d5-42f5-8a57-a7307c819f2f/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2002248-72d5-42f5-8a57-a7307c819f2f/bin/utaipan-I9t0OCRTmS/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext2/split_list_test05-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2002248-72d5-42f5-8a57-a7307c819f2f/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2002248-72d5-42f5-8a57-a7307c819f2f/bin/utaipan-I9t0OCRTmS --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 db322df1d89bf1549765f136e3e3b8000484c0c3108c31998992cf725d6dcc20 --- 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-8393723 [2022-11-19 07:01:43,135 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:01:43,138 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:01:43,173 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:01:43,174 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:01:43,179 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:01:43,183 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:01:43,188 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:01:43,191 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:01:43,197 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:01:43,199 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:01:43,201 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:01:43,202 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:01:43,205 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:01:43,207 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:01:43,210 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:01:43,212 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:01:43,213 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:01:43,216 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:01:43,224 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:01:43,230 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:01:43,232 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:01:43,234 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:01:43,237 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:01:43,245 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:01:43,251 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:01:43,251 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:01:43,253 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:01:43,255 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:01:43,256 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:01:43,257 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:01:43,258 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:01:43,260 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:01:43,262 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:01:43,263 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:01:43,265 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:01:43,267 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:01:43,267 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:01:43,267 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:01:43,268 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:01:43,269 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:01:43,270 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2002248-72d5-42f5-8a57-a7307c819f2f/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-19 07:01:43,319 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:01:43,320 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:01:43,321 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:01:43,321 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:01:43,322 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:01:43,322 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:01:43,323 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:01:43,323 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:01:43,323 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:01:43,323 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:01:43,325 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:01:43,325 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:01:43,325 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:01:43,326 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:01:43,326 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:01:43,326 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:01:43,326 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:01:43,327 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:01:43,328 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-19 07:01:43,328 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-19 07:01:43,328 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:01:43,328 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:01:43,329 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 07:01:43,329 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:01:43,331 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:01:43,331 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:01:43,331 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-19 07:01:43,332 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-19 07:01:43,332 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-19 07:01:43,333 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:01:43,333 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 07:01:43,333 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:01:43,333 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:01:43,334 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:01:43,334 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:01:43,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:01:43,334 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:01:43,335 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:01:43,335 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:01:43,335 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:01:43,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:01:43,336 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:01:43,336 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_e2002248-72d5-42f5-8a57-a7307c819f2f/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2002248-72d5-42f5-8a57-a7307c819f2f/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> db322df1d89bf1549765f136e3e3b8000484c0c3108c31998992cf725d6dcc20 [2022-11-19 07:01:43,692 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:01:43,724 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:01:43,728 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:01:43,730 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:01:43,731 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:01:43,732 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2002248-72d5-42f5-8a57-a7307c819f2f/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/memsafety-ext2/split_list_test05-2.i [2022-11-19 07:01:43,820 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2002248-72d5-42f5-8a57-a7307c819f2f/bin/utaipan-I9t0OCRTmS/data/21cf4a067/aa1a9edacbb34d29bf5394ea90a6d822/FLAGf5f43df4b [2022-11-19 07:01:44,565 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:01:44,566 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2002248-72d5-42f5-8a57-a7307c819f2f/sv-benchmarks/c/memsafety-ext2/split_list_test05-2.i [2022-11-19 07:01:44,596 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2002248-72d5-42f5-8a57-a7307c819f2f/bin/utaipan-I9t0OCRTmS/data/21cf4a067/aa1a9edacbb34d29bf5394ea90a6d822/FLAGf5f43df4b [2022-11-19 07:01:44,815 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2002248-72d5-42f5-8a57-a7307c819f2f/bin/utaipan-I9t0OCRTmS/data/21cf4a067/aa1a9edacbb34d29bf5394ea90a6d822 [2022-11-19 07:01:44,819 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:01:44,820 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:01:44,823 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:01:44,823 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:01:44,828 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:01:44,829 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:01:44" (1/1) ... [2022-11-19 07:01:44,830 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d763380 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:01:44, skipping insertion in model container [2022-11-19 07:01:44,831 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:01:44" (1/1) ... [2022-11-19 07:01:44,840 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:01:44,883 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:01:45,364 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:01:45,373 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:01:45,445 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:01:45,482 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:01:45,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:01:45 WrapperNode [2022-11-19 07:01:45,482 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:01:45,484 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:01:45,484 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:01:45,484 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:01:45,494 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:01:45" (1/1) ... [2022-11-19 07:01:45,529 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:01:45" (1/1) ... [2022-11-19 07:01:45,580 INFO L138 Inliner]: procedures = 125, calls = 95, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 302 [2022-11-19 07:01:45,580 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:01:45,581 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:01:45,581 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:01:45,582 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:01:45,593 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:01:45" (1/1) ... [2022-11-19 07:01:45,594 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:01:45" (1/1) ... [2022-11-19 07:01:45,600 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:01:45" (1/1) ... [2022-11-19 07:01:45,600 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:01:45" (1/1) ... [2022-11-19 07:01:45,630 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:01:45" (1/1) ... [2022-11-19 07:01:45,637 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:01:45" (1/1) ... [2022-11-19 07:01:45,640 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:01:45" (1/1) ... [2022-11-19 07:01:45,642 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:01:45" (1/1) ... [2022-11-19 07:01:45,646 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:01:45,647 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:01:45,648 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:01:45,648 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:01:45,649 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:01:45" (1/1) ... [2022-11-19 07:01:45,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:01:45,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2002248-72d5-42f5-8a57-a7307c819f2f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:01:45,706 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2002248-72d5-42f5-8a57-a7307c819f2f/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:01:45,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2002248-72d5-42f5-8a57-a7307c819f2f/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:01:45,768 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 07:01:45,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 07:01:45,769 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 07:01:45,770 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:01:45,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-19 07:01:45,770 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-19 07:01:45,770 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 07:01:45,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:01:45,770 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:01:45,771 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:01:45,771 INFO L130 BoogieDeclarations]: Found specification of procedure append [2022-11-19 07:01:45,771 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2022-11-19 07:01:45,924 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:01:45,926 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:01:47,109 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:01:47,171 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:01:47,172 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2022-11-19 07:01:47,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:01:47 BoogieIcfgContainer [2022-11-19 07:01:47,176 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:01:47,179 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:01:47,179 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:01:47,190 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:01:47,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:01:44" (1/3) ... [2022-11-19 07:01:47,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@366ba2b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:01:47, skipping insertion in model container [2022-11-19 07:01:47,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:01:45" (2/3) ... [2022-11-19 07:01:47,192 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@366ba2b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:01:47, skipping insertion in model container [2022-11-19 07:01:47,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:01:47" (3/3) ... [2022-11-19 07:01:47,194 INFO L112 eAbstractionObserver]: Analyzing ICFG split_list_test05-2.i [2022-11-19 07:01:47,230 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:01:47,231 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 147 error locations. [2022-11-19 07:01:47,330 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:01:47,342 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;@3c44b132, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:01:47,343 INFO L358 AbstractCegarLoop]: Starting to check reachability of 147 error locations. [2022-11-19 07:01:47,353 INFO L276 IsEmpty]: Start isEmpty. Operand has 293 states, 129 states have (on average 2.356589147286822) internal successors, (304), 278 states have internal predecessors, (304), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-19 07:01:47,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-19 07:01:47,366 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:01:47,367 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-19 07:01:47,368 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-11-19 07:01:47,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:01:47,378 INFO L85 PathProgramCache]: Analyzing trace with hash 17550, now seen corresponding path program 1 times [2022-11-19 07:01:47,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:01:47,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520122222] [2022-11-19 07:01:47,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:47,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:01:47,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:47,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:01:47,675 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:01:47,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520122222] [2022-11-19 07:01:47,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520122222] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:01:47,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:01:47,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:01:47,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062654192] [2022-11-19 07:01:47,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:01:47,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:01:47,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:01:47,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:01:47,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:01:47,737 INFO L87 Difference]: Start difference. First operand has 293 states, 129 states have (on average 2.356589147286822) internal successors, (304), 278 states have internal predecessors, (304), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:01:48,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:01:48,468 INFO L93 Difference]: Finished difference Result 499 states and 552 transitions. [2022-11-19 07:01:48,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:01:48,472 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-19 07:01:48,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:01:48,487 INFO L225 Difference]: With dead ends: 499 [2022-11-19 07:01:48,487 INFO L226 Difference]: Without dead ends: 498 [2022-11-19 07:01:48,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:01:48,493 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 224 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:01:48,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 356 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 07:01:48,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2022-11-19 07:01:48,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 364. [2022-11-19 07:01:48,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 203 states have (on average 2.3201970443349755) internal successors, (471), 349 states have internal predecessors, (471), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-19 07:01:48,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 501 transitions. [2022-11-19 07:01:48,621 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 501 transitions. Word has length 2 [2022-11-19 07:01:48,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:01:48,622 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 501 transitions. [2022-11-19 07:01:48,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:01:48,624 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 501 transitions. [2022-11-19 07:01:48,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-19 07:01:48,625 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:01:48,625 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-19 07:01:48,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:01:48,627 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-11-19 07:01:48,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:01:48,628 INFO L85 PathProgramCache]: Analyzing trace with hash 17551, now seen corresponding path program 1 times [2022-11-19 07:01:48,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:01:48,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995540271] [2022-11-19 07:01:48,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:48,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:01:48,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:48,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:01:48,795 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:01:48,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995540271] [2022-11-19 07:01:48,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995540271] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:01:48,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:01:48,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:01:48,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696238288] [2022-11-19 07:01:48,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:01:48,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:01:48,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:01:48,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:01:48,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:01:48,801 INFO L87 Difference]: Start difference. First operand 364 states and 501 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:01:49,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:01:49,144 INFO L93 Difference]: Finished difference Result 365 states and 504 transitions. [2022-11-19 07:01:49,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:01:49,145 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-19 07:01:49,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:01:49,147 INFO L225 Difference]: With dead ends: 365 [2022-11-19 07:01:49,148 INFO L226 Difference]: Without dead ends: 365 [2022-11-19 07:01:49,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:01:49,150 INFO L413 NwaCegarLoop]: 289 mSDtfsCounter, 5 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:01:49,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 453 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:01:49,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-11-19 07:01:49,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 362. [2022-11-19 07:01:49,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 203 states have (on average 2.310344827586207) internal successors, (469), 347 states have internal predecessors, (469), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-19 07:01:49,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 499 transitions. [2022-11-19 07:01:49,168 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 499 transitions. Word has length 2 [2022-11-19 07:01:49,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:01:49,169 INFO L495 AbstractCegarLoop]: Abstraction has 362 states and 499 transitions. [2022-11-19 07:01:49,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:01:49,169 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 499 transitions. [2022-11-19 07:01:49,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 07:01:49,170 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:01:49,170 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:01:49,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 07:01:49,171 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting appendErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-11-19 07:01:49,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:01:49,172 INFO L85 PathProgramCache]: Analyzing trace with hash -268395331, now seen corresponding path program 1 times [2022-11-19 07:01:49,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:01:49,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148716817] [2022-11-19 07:01:49,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:49,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:01:49,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:49,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:01:49,268 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:01:49,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148716817] [2022-11-19 07:01:49,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148716817] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:01:49,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:01:49,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:01:49,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498418099] [2022-11-19 07:01:49,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:01:49,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:01:49,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:01:49,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:01:49,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:01:49,275 INFO L87 Difference]: Start difference. First operand 362 states and 499 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-11-19 07:01:49,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:01:49,651 INFO L93 Difference]: Finished difference Result 357 states and 494 transitions. [2022-11-19 07:01:49,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:01:49,652 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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 8 [2022-11-19 07:01:49,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:01:49,657 INFO L225 Difference]: With dead ends: 357 [2022-11-19 07:01:49,658 INFO L226 Difference]: Without dead ends: 357 [2022-11-19 07:01:49,659 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 [2022-11-19 07:01:49,667 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 39 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:01:49,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 404 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:01:49,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2022-11-19 07:01:49,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 357. [2022-11-19 07:01:49,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 203 states have (on average 2.2857142857142856) internal successors, (464), 342 states have internal predecessors, (464), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-19 07:01:49,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 494 transitions. [2022-11-19 07:01:49,686 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 494 transitions. Word has length 8 [2022-11-19 07:01:49,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:01:49,687 INFO L495 AbstractCegarLoop]: Abstraction has 357 states and 494 transitions. [2022-11-19 07:01:49,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-11-19 07:01:49,688 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 494 transitions. [2022-11-19 07:01:49,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 07:01:49,688 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:01:49,688 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:01:49,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 07:01:49,689 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting appendErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-11-19 07:01:49,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:01:49,690 INFO L85 PathProgramCache]: Analyzing trace with hash -268395330, now seen corresponding path program 1 times [2022-11-19 07:01:49,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:01:49,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179323124] [2022-11-19 07:01:49,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:49,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:01:49,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:49,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:01:49,799 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:01:49,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179323124] [2022-11-19 07:01:49,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179323124] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:01:49,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:01:49,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:01:49,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774228853] [2022-11-19 07:01:49,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:01:49,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:01:49,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:01:49,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:01:49,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:01:49,803 INFO L87 Difference]: Start difference. First operand 357 states and 494 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-11-19 07:01:50,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:01:50,141 INFO L93 Difference]: Finished difference Result 352 states and 489 transitions. [2022-11-19 07:01:50,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:01:50,141 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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 8 [2022-11-19 07:01:50,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:01:50,143 INFO L225 Difference]: With dead ends: 352 [2022-11-19 07:01:50,143 INFO L226 Difference]: Without dead ends: 352 [2022-11-19 07:01:50,144 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 [2022-11-19 07:01:50,145 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 34 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:01:50,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 415 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:01:50,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-11-19 07:01:50,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 352. [2022-11-19 07:01:50,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 203 states have (on average 2.2610837438423643) internal successors, (459), 337 states have internal predecessors, (459), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-19 07:01:50,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 489 transitions. [2022-11-19 07:01:50,161 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 489 transitions. Word has length 8 [2022-11-19 07:01:50,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:01:50,162 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 489 transitions. [2022-11-19 07:01:50,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-11-19 07:01:50,162 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 489 transitions. [2022-11-19 07:01:50,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:01:50,163 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:01:50,163 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:01:50,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 07:01:50,164 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting appendErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-11-19 07:01:50,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:01:50,165 INFO L85 PathProgramCache]: Analyzing trace with hash 269679752, now seen corresponding path program 1 times [2022-11-19 07:01:50,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:01:50,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435167772] [2022-11-19 07:01:50,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:50,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:01:50,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:50,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:01:50,379 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:01:50,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435167772] [2022-11-19 07:01:50,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435167772] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:01:50,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:01:50,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:01:50,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765416436] [2022-11-19 07:01:50,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:01:50,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:01:50,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:01:50,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:01:50,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:01:50,382 INFO L87 Difference]: Start difference. First operand 352 states and 489 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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) [2022-11-19 07:01:51,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:01:51,280 INFO L93 Difference]: Finished difference Result 475 states and 526 transitions. [2022-11-19 07:01:51,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:01:51,281 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 9 [2022-11-19 07:01:51,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:01:51,283 INFO L225 Difference]: With dead ends: 475 [2022-11-19 07:01:51,284 INFO L226 Difference]: Without dead ends: 475 [2022-11-19 07:01:51,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:01:51,285 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 289 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:01:51,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 633 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 07:01:51,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-11-19 07:01:51,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 344. [2022-11-19 07:01:51,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 203 states have (on average 2.2216748768472905) internal successors, (451), 329 states have internal predecessors, (451), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-19 07:01:51,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 481 transitions. [2022-11-19 07:01:51,298 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 481 transitions. Word has length 9 [2022-11-19 07:01:51,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:01:51,299 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 481 transitions. [2022-11-19 07:01:51,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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) [2022-11-19 07:01:51,299 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 481 transitions. [2022-11-19 07:01:51,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:01:51,300 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:01:51,300 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:01:51,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 07:01:51,300 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting appendErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-11-19 07:01:51,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:01:51,301 INFO L85 PathProgramCache]: Analyzing trace with hash 269679753, now seen corresponding path program 1 times [2022-11-19 07:01:51,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:01:51,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472344787] [2022-11-19 07:01:51,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:51,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:01:51,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:51,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:01:51,553 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:01:51,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472344787] [2022-11-19 07:01:51,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472344787] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:01:51,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:01:51,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:01:51,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926387039] [2022-11-19 07:01:51,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:01:51,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:01:51,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:01:51,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:01:51,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:01:51,556 INFO L87 Difference]: Start difference. First operand 344 states and 481 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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) [2022-11-19 07:01:52,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:01:52,625 INFO L93 Difference]: Finished difference Result 465 states and 516 transitions. [2022-11-19 07:01:52,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:01:52,625 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 9 [2022-11-19 07:01:52,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:01:52,628 INFO L225 Difference]: With dead ends: 465 [2022-11-19 07:01:52,628 INFO L226 Difference]: Without dead ends: 465 [2022-11-19 07:01:52,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:01:52,629 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 736 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 736 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:01:52,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [736 Valid, 308 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-19 07:01:52,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2022-11-19 07:01:52,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 335. [2022-11-19 07:01:52,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 203 states have (on average 2.1724137931034484) internal successors, (441), 320 states have internal predecessors, (441), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-19 07:01:52,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 471 transitions. [2022-11-19 07:01:52,642 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 471 transitions. Word has length 9 [2022-11-19 07:01:52,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:01:52,642 INFO L495 AbstractCegarLoop]: Abstraction has 335 states and 471 transitions. [2022-11-19 07:01:52,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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) [2022-11-19 07:01:52,643 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 471 transitions. [2022-11-19 07:01:52,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-19 07:01:52,643 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:01:52,644 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:01:52,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 07:01:52,644 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting appendErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-11-19 07:01:52,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:01:52,645 INFO L85 PathProgramCache]: Analyzing trace with hash 2120301909, now seen corresponding path program 1 times [2022-11-19 07:01:52,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:01:52,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220886535] [2022-11-19 07:01:52,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:52,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:01:52,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:53,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:01:53,305 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:01:53,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220886535] [2022-11-19 07:01:53,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220886535] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:01:53,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:01:53,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-19 07:01:53,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992445363] [2022-11-19 07:01:53,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:01:53,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:01:53,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:01:53,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:01:53,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:01:53,309 INFO L87 Difference]: Start difference. First operand 335 states and 471 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 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) [2022-11-19 07:01:53,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:01:53,864 INFO L93 Difference]: Finished difference Result 352 states and 491 transitions. [2022-11-19 07:01:53,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:01:53,865 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 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 16 [2022-11-19 07:01:53,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:01:53,867 INFO L225 Difference]: With dead ends: 352 [2022-11-19 07:01:53,868 INFO L226 Difference]: Without dead ends: 352 [2022-11-19 07:01:53,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:01:53,869 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 20 mSDsluCounter, 761 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 1017 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:01:53,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 1017 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:01:53,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-11-19 07:01:53,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 342. [2022-11-19 07:01:53,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 209 states have (on average 2.1435406698564594) internal successors, (448), 326 states have internal predecessors, (448), 16 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-19 07:01:53,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 480 transitions. [2022-11-19 07:01:53,882 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 480 transitions. Word has length 16 [2022-11-19 07:01:53,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:01:53,882 INFO L495 AbstractCegarLoop]: Abstraction has 342 states and 480 transitions. [2022-11-19 07:01:53,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 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) [2022-11-19 07:01:53,882 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 480 transitions. [2022-11-19 07:01:53,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-19 07:01:53,883 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:01:53,883 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:01:53,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 07:01:53,884 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting appendErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-11-19 07:01:53,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:01:53,884 INFO L85 PathProgramCache]: Analyzing trace with hash 749666084, now seen corresponding path program 1 times [2022-11-19 07:01:53,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:01:53,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369225859] [2022-11-19 07:01:53,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:53,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:01:53,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:54,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:01:54,527 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:01:54,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369225859] [2022-11-19 07:01:54,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369225859] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:01:54,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:01:54,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 07:01:54,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133339604] [2022-11-19 07:01:54,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:01:54,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 07:01:54,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:01:54,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 07:01:54,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:01:54,533 INFO L87 Difference]: Start difference. First operand 342 states and 480 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 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) [2022-11-19 07:01:55,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:01:55,701 INFO L93 Difference]: Finished difference Result 476 states and 529 transitions. [2022-11-19 07:01:55,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:01:55,702 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 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 17 [2022-11-19 07:01:55,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:01:55,706 INFO L225 Difference]: With dead ends: 476 [2022-11-19 07:01:55,706 INFO L226 Difference]: Without dead ends: 476 [2022-11-19 07:01:55,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:01:55,707 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 691 mSDsluCounter, 838 mSDsCounter, 0 mSdLazyCounter, 1037 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 706 SdHoareTripleChecker+Valid, 1005 SdHoareTripleChecker+Invalid, 1045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:01:55,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [706 Valid, 1005 Invalid, 1045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1037 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-19 07:01:55,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-11-19 07:01:55,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 344. [2022-11-19 07:01:55,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 211 states have (on average 2.132701421800948) internal successors, (450), 328 states have internal predecessors, (450), 16 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-19 07:01:55,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 482 transitions. [2022-11-19 07:01:55,726 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 482 transitions. Word has length 17 [2022-11-19 07:01:55,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:01:55,726 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 482 transitions. [2022-11-19 07:01:55,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 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) [2022-11-19 07:01:55,731 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 482 transitions. [2022-11-19 07:01:55,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-19 07:01:55,733 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:01:55,733 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 07:01:55,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 07:01:55,734 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting appendErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-11-19 07:01:55,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:01:55,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1443652774, now seen corresponding path program 1 times [2022-11-19 07:01:55,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:01:55,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983358724] [2022-11-19 07:01:55,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:55,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:01:55,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:02:00,627 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:02:00,627 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:02:00,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983358724] [2022-11-19 07:02:00,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983358724] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:02:00,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850208692] [2022-11-19 07:02:00,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:02:00,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:02:00,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2002248-72d5-42f5-8a57-a7307c819f2f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:02:00,635 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2002248-72d5-42f5-8a57-a7307c819f2f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:02:00,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2002248-72d5-42f5-8a57-a7307c819f2f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:02:00,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:02:00,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-19 07:02:00,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:02:01,029 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 [2022-11-19 07:02:01,554 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 [2022-11-19 07:02:01,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:02:01,693 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:02:01,694 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 16 treesize of output 22 [2022-11-19 07:02:01,713 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 7 treesize of output 3 [2022-11-19 07:02:01,744 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:02:01,745 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 16 treesize of output 22 [2022-11-19 07:02:01,761 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 7 treesize of output 3 [2022-11-19 07:02:01,897 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:02:01,897 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 20 treesize of output 26 [2022-11-19 07:02:01,923 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:02:01,924 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 20 treesize of output 26 [2022-11-19 07:02:02,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:02:02,195 INFO L321 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2022-11-19 07:02:02,196 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 29 treesize of output 28 [2022-11-19 07:02:02,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:02:02,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-19 07:02:02,611 INFO L321 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2022-11-19 07:02:02,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 24 [2022-11-19 07:02:02,794 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 46 treesize of output 44 [2022-11-19 07:02:02,803 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 35 treesize of output 35 [2022-11-19 07:02:03,101 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 46 treesize of output 44 [2022-11-19 07:02:03,111 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 35 treesize of output 35 [2022-11-19 07:02:03,161 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 46 treesize of output 44 [2022-11-19 07:02:03,172 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 35 treesize of output 35 [2022-11-19 07:02:03,313 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:02:03,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 21 [2022-11-19 07:02:03,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:02:03,324 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 14 [2022-11-19 07:02:03,407 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:02:03,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:02:03,586 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_append_~head.offset 4))) (and (forall ((v_ArrVal_297 (Array Int Int))) (<= 0 (+ (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_297) c_append_~head.base) .cse0) 5))) (forall ((v_ArrVal_298 (Array Int Int)) (v_ArrVal_297 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_297) c_append_~head.base) .cse0) 9) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_298) c_append_~head.base) .cse0)))))) is different from false [2022-11-19 07:02:06,770 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:02:06,770 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 116 treesize of output 117 [2022-11-19 07:02:06,791 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:02:06,792 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 136 treesize of output 127 [2022-11-19 07:02:06,812 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:02:06,812 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 289 treesize of output 219 [2022-11-19 07:02:06,851 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:02:06,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 556 treesize of output 538 [2022-11-19 07:02:06,931 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:02:06,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 846 treesize of output 836 [2022-11-19 07:02:06,970 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 798 treesize of output 722 [2022-11-19 07:02:07,010 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 693 treesize of output 629 [2022-11-19 07:02:07,063 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:02:07,064 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 629 treesize of output 602 [2022-11-19 07:02:07,102 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 630 treesize of output 586 [2022-11-19 07:02:07,140 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 561 treesize of output 553 [2022-11-19 07:03:28,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850208692] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:03:28,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1520399879] [2022-11-19 07:03:28,039 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-11-19 07:03:28,039 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:03:28,045 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:03:28,051 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:03:28,052 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:03:28,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:28,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:28,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 07:03:28,132 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 [2022-11-19 07:03:28,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:28,142 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 30 treesize of output 21 [2022-11-19 07:03:28,152 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 [2022-11-19 07:03:28,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:28,172 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 [2022-11-19 07:03:28,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:28,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-19 07:03:28,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:28,195 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 [2022-11-19 07:03:28,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:28,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:28,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 07:03:28,270 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 [2022-11-19 07:03:28,276 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 [2022-11-19 07:03:28,285 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 15 treesize of output 1 [2022-11-19 07:03:28,291 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 [2022-11-19 07:03:28,299 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 [2022-11-19 07:03:28,349 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 [2022-11-19 07:03:28,355 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 [2022-11-19 07:03:28,360 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 11 treesize of output 7 [2022-11-19 07:03:28,369 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 [2022-11-19 07:03:28,375 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 [2022-11-19 07:03:28,381 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 [2022-11-19 07:03:28,390 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 [2022-11-19 07:03:28,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:28,422 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-19 07:03:28,422 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 1 case distinctions, treesize of input 30 treesize of output 42 [2022-11-19 07:03:28,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:28,452 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-19 07:03:28,453 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 1 case distinctions, treesize of input 30 treesize of output 32 [2022-11-19 07:03:28,466 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 [2022-11-19 07:03:28,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:28,506 INFO L321 Elim1Store]: treesize reduction 72, result has 19.1 percent of original size [2022-11-19 07:03:28,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 44 [2022-11-19 07:03:28,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:28,578 INFO L321 Elim1Store]: treesize reduction 52, result has 41.6 percent of original size [2022-11-19 07:03:28,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 74 [2022-11-19 07:03:28,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:28,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:28,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-11-19 07:03:28,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:28,761 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 [2022-11-19 07:03:28,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:28,774 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 [2022-11-19 07:03:28,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:28,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:28,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:03:28,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 28 [2022-11-19 07:03:28,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:28,860 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 [2022-11-19 07:03:28,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:28,946 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 [2022-11-19 07:03:28,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:28,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:28,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-11-19 07:03:29,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:29,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:29,033 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:03:29,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 28 [2022-11-19 07:03:29,052 INFO L197 IcfgInterpreter]: Interpreting procedure append with input of size 91 for LOIs [2022-11-19 07:03:29,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:29,466 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 19 [2022-11-19 07:03:29,475 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 [2022-11-19 07:03:29,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:29,487 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 19 [2022-11-19 07:03:29,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:29,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:29,509 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:03:29,510 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 29 treesize of output 31 [2022-11-19 07:03:29,518 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 [2022-11-19 07:03:29,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:29,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:29,534 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:03:29,535 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 29 treesize of output 31 [2022-11-19 07:03:29,565 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 [2022-11-19 07:03:29,572 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 [2022-11-19 07:03:29,579 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 11 treesize of output 7 [2022-11-19 07:03:29,593 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 [2022-11-19 07:03:29,602 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 [2022-11-19 07:03:29,610 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 [2022-11-19 07:03:29,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 07:03:29,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:29,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:29,637 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 30 treesize of output 32 [2022-11-19 07:03:29,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:29,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:29,654 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 30 treesize of output 32 [2022-11-19 07:03:29,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:29,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:29,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:29,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:29,685 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:03:29,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 44 [2022-11-19 07:03:29,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:29,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:29,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:29,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:29,711 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:03:29,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 44 [2022-11-19 07:03:29,724 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 19 treesize of output 1 [2022-11-19 07:03:29,732 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:03:36,532 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6664#(and (= (select (select |#memory_$Pointer$.base| append_~node~0.base) (+ 5 append_~node~0.offset)) 0) (<= 0 (+ append_~input 128)) (= append_~node~0.offset 0) (<= 0 (+ 128 |append_#in~input|)) (= (select (select |#memory_$Pointer$.base| append_~node~0.base) (+ append_~node~0.offset 1)) (select (select |#memory_$Pointer$.base| append_~head.base) (+ append_~head.offset 4))) (<= (+ 8 append_~head.offset) (select |#length| append_~head.base)) (<= append_~head.offset 0) (= (select (select |#memory_$Pointer$.offset| append_~node~0.base) (+ 5 append_~node~0.offset)) 0) (= (select (select |#memory_$Pointer$.offset| append_~head.base) (+ append_~head.offset 4)) |append_#t~mem60.offset|) (<= 0 append_~head.offset) (= |append_#in~head.offset| 0) (= (select (select |#memory_$Pointer$.offset| append_~node~0.base) (+ append_~node~0.offset 1)) (select (select |#memory_$Pointer$.offset| append_~head.base) (+ append_~head.offset 4))) (or (not (<= (+ |append_#t~mem60.offset| 9) (select |#length| |append_#t~mem60.base|))) (not (<= 0 (+ |append_#t~mem60.offset| 5)))) (= |#NULL.offset| 0) (= (select |#valid| append_~head.base) 1) (= (select |#valid| append_~node~0.base) 1) (<= append_~input 127) (<= |append_#in~input| 127) (= |append_#t~mem60.base| (select (select |#memory_$Pointer$.base| append_~head.base) (+ append_~head.offset 4))) (<= 0 |#StackHeapBarrier|) (<= (+ 9 append_~node~0.offset) (select |#length| append_~node~0.base)) (= |#NULL.base| 0))' at error location [2022-11-19 07:03:36,532 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:03:36,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:03:36,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 13] total 34 [2022-11-19 07:03:36,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532982990] [2022-11-19 07:03:36,533 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:03:36,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-19 07:03:36,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:03:36,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-19 07:03:36,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=3773, Unknown=2, NotChecked=124, Total=4160 [2022-11-19 07:03:36,537 INFO L87 Difference]: Start difference. First operand 344 states and 482 transitions. Second operand has 36 states, 35 states have (on average 1.6) internal successors, (56), 31 states have internal predecessors, (56), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:03:58,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:03:58,824 INFO L93 Difference]: Finished difference Result 1012 states and 1204 transitions. [2022-11-19 07:03:58,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-19 07:03:58,825 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.6) internal successors, (56), 31 states have internal predecessors, (56), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2022-11-19 07:03:58,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:03:58,836 INFO L225 Difference]: With dead ends: 1012 [2022-11-19 07:03:58,837 INFO L226 Difference]: Without dead ends: 1012 [2022-11-19 07:03:58,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2700 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=719, Invalid=9183, Unknown=2, NotChecked=196, Total=10100 [2022-11-19 07:03:58,841 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 1275 mSDsluCounter, 4080 mSDsCounter, 0 mSdLazyCounter, 11594 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1275 SdHoareTripleChecker+Valid, 4266 SdHoareTripleChecker+Invalid, 13902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 11594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2024 IncrementalHoareTripleChecker+Unchecked, 15.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:03:58,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1275 Valid, 4266 Invalid, 13902 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [284 Valid, 11594 Invalid, 0 Unknown, 2024 Unchecked, 15.2s Time] [2022-11-19 07:03:58,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2022-11-19 07:03:58,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 414. [2022-11-19 07:03:58,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 262 states have (on average 1.9694656488549618) internal successors, (516), 381 states have internal predecessors, (516), 32 states have call successors, (32), 5 states have call predecessors, (32), 4 states have return successors, (78), 31 states have call predecessors, (78), 32 states have call successors, (78) [2022-11-19 07:03:58,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 626 transitions. [2022-11-19 07:03:58,909 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 626 transitions. Word has length 31 [2022-11-19 07:03:58,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:03:58,911 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 626 transitions. [2022-11-19 07:03:58,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.6) internal successors, (56), 31 states have internal predecessors, (56), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:03:58,911 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 626 transitions. [2022-11-19 07:03:58,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-19 07:03:58,914 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:03:58,914 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 07:03:58,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2002248-72d5-42f5-8a57-a7307c819f2f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:03:59,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2002248-72d5-42f5-8a57-a7307c819f2f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:03:59,129 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting appendErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-11-19 07:03:59,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:03:59,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1443652773, now seen corresponding path program 1 times [2022-11-19 07:03:59,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:03:59,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204220062] [2022-11-19 07:03:59,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:59,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:03:59,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:00,366 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:04:00,366 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:04:00,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204220062] [2022-11-19 07:04:00,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204220062] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:04:00,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494236419] [2022-11-19 07:04:00,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:00,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:04:00,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2002248-72d5-42f5-8a57-a7307c819f2f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:04:00,368 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2002248-72d5-42f5-8a57-a7307c819f2f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:04:00,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2002248-72d5-42f5-8a57-a7307c819f2f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:04:00,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:00,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-19 07:04:00,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:04:00,574 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 [2022-11-19 07:04:00,839 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 13 treesize of output 9 [2022-11-19 07:04:00,933 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:04:00,933 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 16 treesize of output 22 [2022-11-19 07:04:00,940 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 7 treesize of output 3 [2022-11-19 07:04:01,067 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:04:01,068 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 31 treesize of output 37 [2022-11-19 07:04:01,099 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:04:01,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:04:01,271 INFO L321 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2022-11-19 07:04:01,271 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 29 treesize of output 28 [2022-11-19 07:04:01,492 INFO L321 Elim1Store]: treesize reduction 54, result has 36.5 percent of original size [2022-11-19 07:04:01,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 45 [2022-11-19 07:04:01,591 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 38 treesize of output 36 [2022-11-19 07:04:01,751 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 38 treesize of output 36 [2022-11-19 07:04:01,785 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 38 treesize of output 36 [2022-11-19 07:04:01,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:04:01,889 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 17 [2022-11-19 07:04:01,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:04:01,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:04:02,015 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_455 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_455) c_append_~head.base) (+ c_append_~head.offset 4))) 1)) is different from false [2022-11-19 07:04:02,283 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:04:02,283 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 33 treesize of output 34 [2022-11-19 07:04:02,300 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:04:02,300 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 332 treesize of output 214 [2022-11-19 07:04:02,316 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 182 treesize of output 174 [2022-11-19 07:04:02,326 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 174 treesize of output 158 [2022-11-19 07:04:02,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494236419] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:04:02,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [254520035] [2022-11-19 07:04:02,726 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-11-19 07:04:02,726 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:04:02,727 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:04:02,727 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:04:02,727 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:04:02,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:02,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:02,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 07:04:02,759 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 [2022-11-19 07:04:02,767 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 [2022-11-19 07:04:02,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:02,788 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 30 treesize of output 21 [2022-11-19 07:04:02,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:02,810 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 [2022-11-19 07:04:02,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:02,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-19 07:04:02,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:02,835 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 [2022-11-19 07:04:02,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:02,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:02,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 07:04:02,916 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 [2022-11-19 07:04:02,923 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 [2022-11-19 07:04:02,932 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 [2022-11-19 07:04:02,939 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 [2022-11-19 07:04:02,948 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 15 treesize of output 1 [2022-11-19 07:04:02,985 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 [2022-11-19 07:04:02,991 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 [2022-11-19 07:04:02,997 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 [2022-11-19 07:04:03,004 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 [2022-11-19 07:04:03,012 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 [2022-11-19 07:04:03,021 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 07:04:03,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:03,048 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-19 07:04:03,048 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 1 case distinctions, treesize of input 30 treesize of output 32 [2022-11-19 07:04:03,058 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 [2022-11-19 07:04:03,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:03,094 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-19 07:04:03,094 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 1 case distinctions, treesize of input 30 treesize of output 42 [2022-11-19 07:04:03,109 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 [2022-11-19 07:04:03,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:03,171 INFO L321 Elim1Store]: treesize reduction 52, result has 41.6 percent of original size [2022-11-19 07:04:03,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 74 [2022-11-19 07:04:03,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:03,225 INFO L321 Elim1Store]: treesize reduction 72, result has 19.1 percent of original size [2022-11-19 07:04:03,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 44 [2022-11-19 07:04:03,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:03,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:03,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-11-19 07:04:03,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:03,355 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 [2022-11-19 07:04:03,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:03,363 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 [2022-11-19 07:04:03,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:03,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:03,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 07:04:03,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:03,507 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 [2022-11-19 07:04:03,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:03,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:03,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-11-19 07:04:03,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:03,533 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 [2022-11-19 07:04:03,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:03,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:03,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:04:03,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 28 [2022-11-19 07:04:03,623 INFO L197 IcfgInterpreter]: Interpreting procedure append with input of size 94 for LOIs [2022-11-19 07:04:04,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:04,026 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 19 treesize of output 19 [2022-11-19 07:04:04,033 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 [2022-11-19 07:04:04,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:04,045 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 19 [2022-11-19 07:04:04,060 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 [2022-11-19 07:04:04,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:04,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:04,075 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:04:04,076 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 29 treesize of output 31 [2022-11-19 07:04:04,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:04,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:04,093 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:04:04,094 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 29 treesize of output 31 [2022-11-19 07:04:04,120 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 [2022-11-19 07:04:04,127 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 [2022-11-19 07:04:04,133 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 11 treesize of output 7 [2022-11-19 07:04:04,148 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 [2022-11-19 07:04:04,155 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 [2022-11-19 07:04:04,163 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 [2022-11-19 07:04:04,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:04,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:04,183 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 30 treesize of output 32 [2022-11-19 07:04:04,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 07:04:04,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:04,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:04,209 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 30 treesize of output 32 [2022-11-19 07:04:04,229 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 [2022-11-19 07:04:04,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:04,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:04,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:04,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:04,248 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:04:04,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 44 [2022-11-19 07:04:04,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:04,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:04,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:04,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:04,270 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:04:04,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 44 [2022-11-19 07:04:04,285 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:04:09,754 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8350#(and (= (select (select |#memory_$Pointer$.base| append_~node~0.base) (+ 5 append_~node~0.offset)) 0) (<= 0 (+ append_~input 128)) (= append_~node~0.offset 0) (<= 0 (+ 128 |append_#in~input|)) (= (select (select |#memory_$Pointer$.base| append_~node~0.base) (+ append_~node~0.offset 1)) (select (select |#memory_$Pointer$.base| append_~head.base) (+ append_~head.offset 4))) (<= (+ 8 append_~head.offset) (select |#length| append_~head.base)) (<= append_~head.offset 0) (= (select (select |#memory_$Pointer$.offset| append_~node~0.base) (+ 5 append_~node~0.offset)) 0) (= (select (select |#memory_$Pointer$.offset| append_~head.base) (+ append_~head.offset 4)) |append_#t~mem60.offset|) (<= 0 append_~head.offset) (= |append_#in~head.offset| 0) (= (select (select |#memory_$Pointer$.offset| append_~node~0.base) (+ append_~node~0.offset 1)) (select (select |#memory_$Pointer$.offset| append_~head.base) (+ append_~head.offset 4))) (= |#NULL.offset| 0) (= (select |#valid| append_~head.base) 1) (= (select |#valid| append_~node~0.base) 1) (not (= (select |#valid| |append_#t~mem60.base|) 1)) (<= append_~input 127) (<= |append_#in~input| 127) (= |append_#t~mem60.base| (select (select |#memory_$Pointer$.base| append_~head.base) (+ append_~head.offset 4))) (<= 0 |#StackHeapBarrier|) (<= (+ 9 append_~node~0.offset) (select |#length| append_~node~0.base)) (= |#NULL.base| 0))' at error location [2022-11-19 07:04:09,754 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:04:09,754 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:04:09,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2022-11-19 07:04:09,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306505406] [2022-11-19 07:04:09,754 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:04:09,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-19 07:04:09,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:04:09,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-19 07:04:09,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=2428, Unknown=2, NotChecked=100, Total=2756 [2022-11-19 07:04:09,757 INFO L87 Difference]: Start difference. First operand 414 states and 626 transitions. Second operand has 26 states, 25 states have (on average 2.24) internal successors, (56), 22 states have internal predecessors, (56), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:04:11,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:04:11,264 INFO L93 Difference]: Finished difference Result 423 states and 634 transitions. [2022-11-19 07:04:11,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-19 07:04:11,265 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.24) internal successors, (56), 22 states have internal predecessors, (56), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2022-11-19 07:04:11,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:04:11,268 INFO L225 Difference]: With dead ends: 423 [2022-11-19 07:04:11,268 INFO L226 Difference]: Without dead ends: 423 [2022-11-19 07:04:11,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1046 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=256, Invalid=2716, Unknown=2, NotChecked=106, Total=3080 [2022-11-19 07:04:11,270 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 50 mSDsluCounter, 2610 mSDsCounter, 0 mSdLazyCounter, 1601 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 2854 SdHoareTripleChecker+Invalid, 2074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 456 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:04:11,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 2854 Invalid, 2074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1601 Invalid, 0 Unknown, 456 Unchecked, 1.2s Time] [2022-11-19 07:04:11,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-11-19 07:04:11,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 422. [2022-11-19 07:04:11,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 269 states have (on average 1.9442379182156133) internal successors, (523), 389 states have internal predecessors, (523), 32 states have call successors, (32), 5 states have call predecessors, (32), 5 states have return successors, (78), 31 states have call predecessors, (78), 32 states have call successors, (78) [2022-11-19 07:04:11,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 633 transitions. [2022-11-19 07:04:11,293 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 633 transitions. Word has length 31 [2022-11-19 07:04:11,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:04:11,293 INFO L495 AbstractCegarLoop]: Abstraction has 422 states and 633 transitions. [2022-11-19 07:04:11,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.24) internal successors, (56), 22 states have internal predecessors, (56), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:04:11,294 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 633 transitions. [2022-11-19 07:04:11,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-19 07:04:11,295 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:04:11,295 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] [2022-11-19 07:04:11,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2002248-72d5-42f5-8a57-a7307c819f2f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:04:11,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2002248-72d5-42f5-8a57-a7307c819f2f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-19 07:04:11,503 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting appendErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-11-19 07:04:11,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:04:11,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1248379379, now seen corresponding path program 1 times [2022-11-19 07:04:11,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:04:11,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789981110] [2022-11-19 07:04:11,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:11,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:04:11,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:12,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:04:12,393 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:04:12,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789981110] [2022-11-19 07:04:12,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789981110] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:04:12,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972947640] [2022-11-19 07:04:12,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:12,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:04:12,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2002248-72d5-42f5-8a57-a7307c819f2f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:04:12,395 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2002248-72d5-42f5-8a57-a7307c819f2f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:04:12,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2002248-72d5-42f5-8a57-a7307c819f2f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:04:12,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:12,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-19 07:04:12,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:04:12,630 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 [2022-11-19 07:04:12,809 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 [2022-11-19 07:04:12,857 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 [2022-11-19 07:04:12,920 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:04:12,920 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 1 case distinctions, treesize of input 23 treesize of output 27 [2022-11-19 07:04:12,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-11-19 07:04:13,000 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:04:13,001 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 1 case distinctions, treesize of input 28 treesize of output 32 [2022-11-19 07:04:13,115 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-19 07:04:13,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:04:13,258 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 07:04:13,258 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 [2022-11-19 07:04:13,308 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 36 treesize of output 32 [2022-11-19 07:04:13,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:04:13,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:04:13,372 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_603 (Array Int Int))) (not (= 0 (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_603) c_append_~head.base) c_append_~head.offset)))) is different from false [2022-11-19 07:04:13,616 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:04:13,616 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 2 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 07:04:13,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:04:13,625 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:04:13,625 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 64 treesize of output 34 [2022-11-19 07:04:13,630 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 20 treesize of output 18 [2022-11-19 07:04:13,647 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-19 07:04:13,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-11-19 07:04:13,902 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:04:13,902 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 07:04:13,922 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:04:13,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 141 treesize of output 147 [2022-11-19 07:04:13,931 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 114 treesize of output 110 [2022-11-19 07:04:13,937 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 110 treesize of output 102 [2022-11-19 07:04:14,311 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:04:14,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 61 treesize of output 169 [2022-11-19 07:04:14,904 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-19 07:04:14,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972947640] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:04:14,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [501592933] [2022-11-19 07:04:14,907 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-11-19 07:04:14,908 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:04:14,908 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:04:14,909 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:04:14,909 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:04:14,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:14,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:14,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 07:04:14,939 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 [2022-11-19 07:04:14,951 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 [2022-11-19 07:04:14,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:14,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-19 07:04:14,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:14,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-19 07:04:14,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:14,985 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 [2022-11-19 07:04:14,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:14,993 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 [2022-11-19 07:04:15,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:15,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:15,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 07:04:15,047 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 [2022-11-19 07:04:15,052 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 [2022-11-19 07:04:15,059 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 [2022-11-19 07:04:15,065 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 [2022-11-19 07:04:15,071 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 [2022-11-19 07:04:15,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:15,096 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 28 treesize of output 23 [2022-11-19 07:04:15,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:15,129 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 28 treesize of output 23 [2022-11-19 07:04:15,156 INFO L321 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2022-11-19 07:04:15,156 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 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-19 07:04:15,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:15,171 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 23 [2022-11-19 07:04:15,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:15,180 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 30 treesize of output 23 [2022-11-19 07:04:15,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:15,191 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 35 treesize of output 19 [2022-11-19 07:04:15,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:15,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:15,226 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-19 07:04:15,226 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 30 treesize of output 42 [2022-11-19 07:04:15,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:15,239 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 35 treesize of output 19 [2022-11-19 07:04:15,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:15,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:15,265 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-19 07:04:15,266 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 30 treesize of output 32 [2022-11-19 07:04:15,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:15,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:15,309 INFO L321 Elim1Store]: treesize reduction 72, result has 19.1 percent of original size [2022-11-19 07:04:15,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 44 [2022-11-19 07:04:15,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:15,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:15,367 INFO L321 Elim1Store]: treesize reduction 62, result has 30.3 percent of original size [2022-11-19 07:04:15,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 64 [2022-11-19 07:04:15,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:15,386 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 35 treesize of output 19 [2022-11-19 07:04:15,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:15,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:15,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-11-19 07:04:15,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:15,505 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 [2022-11-19 07:04:15,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:15,519 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 [2022-11-19 07:04:15,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:15,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:15,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 07:04:15,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:15,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:15,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-11-19 07:04:15,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:15,619 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 [2022-11-19 07:04:15,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:15,630 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 17 treesize of output 7 [2022-11-19 07:04:15,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:15,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:15,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:04:15,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 28 [2022-11-19 07:04:15,716 INFO L197 IcfgInterpreter]: Interpreting procedure append with input of size 94 for LOIs [2022-11-19 07:04:18,163 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:04:39,708 WARN L233 SmtUtils]: Spent 6.20s on a formula simplification. DAG size of input: 218 DAG size of output: 188 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:04:56,819 WARN L233 SmtUtils]: Spent 14.10s on a formula simplification. DAG size of input: 227 DAG size of output: 198 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:05:12,790 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9444#(and (= |append_#in~head.offset| append_~head.offset) (not (= append_~node~0.base 0)) (= append_~node~0.offset 0) (< append_~node~0.base |#StackHeapBarrier|) (<= (+ 8 append_~head.offset) (select |#length| append_~head.base)) (= (select (select |#memory_$Pointer$.offset| append_~head.base) (+ append_~head.offset 4)) |append_#t~mem60.offset|) (= append_~head.base |append_#in~head.base|) (or (not (<= (+ |append_#t~mem60.offset| 9) (select |#length| |append_#t~mem60.base|))) (not (<= 0 (+ |append_#t~mem60.offset| 5)))) (or (and (= 0 (select |old(#valid)| append_~node~0.base)) (exists ((v_DerPreprocessor_10 Int)) (= |#memory_int| (store |old(#memory_int)| append_~node~0.base (store (store (store (select |old(#memory_int)| append_~node~0.base) append_~node~0.offset append_~input) (+ append_~node~0.offset 1) v_DerPreprocessor_10) (+ 5 append_~node~0.offset) (select (select |#memory_int| append_~node~0.base) (+ 5 append_~node~0.offset)))))) (exists ((v_DerPreprocessor_8 Int)) (and (= (select (select (store |old(#memory_$Pointer$.base)| append_~node~0.base (store (select |old(#memory_$Pointer$.base)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_8)) append_~head.base) append_~head.offset) 0) (= (store |old(#memory_$Pointer$.base)| append_~node~0.base (store (store (store (select |old(#memory_$Pointer$.base)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_8) (+ append_~node~0.offset 1) (select (select (store |old(#memory_$Pointer$.base)| append_~node~0.base (store (select |old(#memory_$Pointer$.base)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_8)) append_~head.base) (+ append_~head.offset 4))) (+ 5 append_~node~0.offset) 0)) |#memory_$Pointer$.base|))) (exists ((v_DerPreprocessor_3 Int)) (and (= |#memory_$Pointer$.offset| (store |old(#memory_$Pointer$.offset)| append_~node~0.base (store (store (store (select |old(#memory_$Pointer$.offset)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_3) (+ append_~node~0.offset 1) (select (select (store |old(#memory_$Pointer$.offset)| append_~node~0.base (store (select |old(#memory_$Pointer$.offset)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_3)) append_~head.base) (+ append_~head.offset 4))) (+ 5 append_~node~0.offset) 0))) (= (select (select (store |old(#memory_$Pointer$.offset)| append_~node~0.base (store (select |old(#memory_$Pointer$.offset)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_3)) append_~head.base) append_~head.offset) 0) (not (= (select (select (store |old(#memory_$Pointer$.offset)| append_~node~0.base (store (select |old(#memory_$Pointer$.offset)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_3)) append_~head.base) (+ append_~head.offset 4)) 0)))) (= (store |old(#length)| append_~node~0.base 9) |#length|) (= |append_#in~head.offset| 0) (= |#NULL.offset| 0) (= 60 |append_#in~input|) (= |#valid| (store |old(#valid)| append_~node~0.base 1)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0)) (and (= 0 (select |old(#valid)| append_~node~0.base)) (= (store |old(#length)| append_~node~0.base 9) |#length|) (exists ((v_DerPreprocessor_9 Int)) (= |#memory_int| (store |old(#memory_int)| append_~node~0.base (store (store (store (select |old(#memory_int)| append_~node~0.base) append_~node~0.offset append_~input) (+ append_~node~0.offset 1) v_DerPreprocessor_9) (+ 5 append_~node~0.offset) (select (select |#memory_int| append_~node~0.base) (+ 5 append_~node~0.offset)))))) (= |append_#in~head.offset| 0) (= |#NULL.offset| 0) (= 60 |append_#in~input|) (exists ((v_DerPreprocessor_2 Int)) (and (= (select (select (store |old(#memory_$Pointer$.offset)| append_~node~0.base (store (select |old(#memory_$Pointer$.offset)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_2)) append_~head.base) append_~head.offset) 0) (= |#memory_$Pointer$.offset| (store |old(#memory_$Pointer$.offset)| append_~node~0.base (store (store (store (select |old(#memory_$Pointer$.offset)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_2) (+ append_~node~0.offset 1) (select (select (store |old(#memory_$Pointer$.offset)| append_~node~0.base (store (select |old(#memory_$Pointer$.offset)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_2)) append_~head.base) (+ append_~head.offset 4))) (+ 5 append_~node~0.offset) 0))))) (= |#valid| (store |old(#valid)| append_~node~0.base 1)) (exists ((v_DerPreprocessor_5 Int)) (and (= 0 (select (select (store |old(#memory_$Pointer$.base)| append_~node~0.base (store (select |old(#memory_$Pointer$.base)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_5)) append_~head.base) append_~head.offset)) (= |#memory_$Pointer$.base| (store |old(#memory_$Pointer$.base)| append_~node~0.base (store (store (store (select |old(#memory_$Pointer$.base)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_5) (+ append_~node~0.offset 1) (select (select (store |old(#memory_$Pointer$.base)| append_~node~0.base (store (select |old(#memory_$Pointer$.base)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_5)) append_~head.base) (+ append_~head.offset 4))) (+ 5 append_~node~0.offset) 0))) (not (= (select (select (store |old(#memory_$Pointer$.base)| append_~node~0.base (store (select |old(#memory_$Pointer$.base)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_5)) append_~head.base) (+ append_~head.offset 4)) 0)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) (= (select |#valid| append_~head.base) 1) (= append_~input |append_#in~input|) (= |append_#t~mem60.base| (select (select |#memory_$Pointer$.base| append_~head.base) (+ append_~head.offset 4))))' at error location [2022-11-19 07:05:12,790 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:05:12,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:05:12,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 35 [2022-11-19 07:05:12,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344359822] [2022-11-19 07:05:12,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:05:12,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-19 07:05:12,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:05:12,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-19 07:05:12,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=2899, Unknown=1, NotChecked=112, Total=3422 [2022-11-19 07:05:12,794 INFO L87 Difference]: Start difference. First operand 422 states and 633 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 30 states have internal predecessors, (70), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:05:14,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:05:14,427 INFO L93 Difference]: Finished difference Result 419 states and 581 transitions. [2022-11-19 07:05:14,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-19 07:05:14,428 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 30 states have internal predecessors, (70), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2022-11-19 07:05:14,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:05:14,430 INFO L225 Difference]: With dead ends: 419 [2022-11-19 07:05:14,431 INFO L226 Difference]: Without dead ends: 419 [2022-11-19 07:05:14,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1778 ImplicationChecksByTransitivity, 56.4s TimeCoverageRelationStatistics Valid=544, Invalid=3749, Unknown=1, NotChecked=128, Total=4422 [2022-11-19 07:05:14,433 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 134 mSDsluCounter, 2152 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 2404 SdHoareTripleChecker+Invalid, 1474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 629 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:05:14,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 2404 Invalid, 1474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 822 Invalid, 0 Unknown, 629 Unchecked, 0.8s Time] [2022-11-19 07:05:14,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-11-19 07:05:14,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 411. [2022-11-19 07:05:14,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 271 states have (on average 1.918819188191882) internal successors, (520), 389 states have internal predecessors, (520), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (21), 17 states have call predecessors, (21), 19 states have call successors, (21) [2022-11-19 07:05:14,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 560 transitions. [2022-11-19 07:05:14,448 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 560 transitions. Word has length 32 [2022-11-19 07:05:14,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:05:14,449 INFO L495 AbstractCegarLoop]: Abstraction has 411 states and 560 transitions. [2022-11-19 07:05:14,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 30 states have internal predecessors, (70), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:05:14,450 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 560 transitions. [2022-11-19 07:05:14,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-19 07:05:14,451 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:05:14,451 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, 1, 1, 1] [2022-11-19 07:05:14,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2002248-72d5-42f5-8a57-a7307c819f2f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:05:14,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2002248-72d5-42f5-8a57-a7307c819f2f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-19 07:05:14,658 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting appendErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-11-19 07:05:14,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:05:14,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1845762523, now seen corresponding path program 1 times [2022-11-19 07:05:14,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:05:14,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435381760] [2022-11-19 07:05:14,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:05:14,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:05:14,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:05:15,780 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:05:15,780 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:05:15,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435381760] [2022-11-19 07:05:15,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435381760] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:05:15,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885377354] [2022-11-19 07:05:15,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:05:15,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:05:15,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2002248-72d5-42f5-8a57-a7307c819f2f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:05:15,784 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2002248-72d5-42f5-8a57-a7307c819f2f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:05:15,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2002248-72d5-42f5-8a57-a7307c819f2f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:05:15,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:05:15,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-19 07:05:15,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:05:16,004 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 [2022-11-19 07:05:16,254 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 [2022-11-19 07:05:16,342 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:05:16,342 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 16 treesize of output 22 [2022-11-19 07:05:16,359 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 7 treesize of output 3 [2022-11-19 07:05:16,483 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:05:16,484 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 31 treesize of output 37 [2022-11-19 07:05:16,511 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:05:16,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:05:16,676 INFO L321 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2022-11-19 07:05:16,676 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 29 treesize of output 28 [2022-11-19 07:05:16,944 INFO L321 Elim1Store]: treesize reduction 54, result has 36.5 percent of original size [2022-11-19 07:05:16,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 45 [2022-11-19 07:05:17,039 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 38 treesize of output 36 [2022-11-19 07:05:17,276 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 38 treesize of output 36 [2022-11-19 07:05:17,326 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 38 treesize of output 36 [2022-11-19 07:05:17,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:05:17,431 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 17 [2022-11-19 07:05:17,499 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:05:17,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:05:22,068 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:05:22,068 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 33 treesize of output 34 [2022-11-19 07:05:22,086 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:05:22,086 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 170 treesize of output 118 [2022-11-19 07:05:22,096 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 86 treesize of output 78 [2022-11-19 07:05:22,105 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 40 treesize of output 36 [2022-11-19 07:05:22,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885377354] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:05:22,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [12903595] [2022-11-19 07:05:22,555 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-19 07:05:22,555 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:05:22,556 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:05:22,556 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:05:22,556 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:05:22,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:22,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:22,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 07:05:22,592 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 [2022-11-19 07:05:22,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:22,603 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 30 treesize of output 21 [2022-11-19 07:05:22,613 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 [2022-11-19 07:05:22,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:22,630 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 [2022-11-19 07:05:22,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:22,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-19 07:05:22,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:22,654 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 [2022-11-19 07:05:22,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:22,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:22,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 07:05:22,719 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 [2022-11-19 07:05:22,725 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 [2022-11-19 07:05:22,733 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 [2022-11-19 07:05:22,740 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 [2022-11-19 07:05:22,746 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 [2022-11-19 07:05:22,778 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 [2022-11-19 07:05:22,783 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 [2022-11-19 07:05:22,789 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 [2022-11-19 07:05:22,795 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 [2022-11-19 07:05:22,801 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 [2022-11-19 07:05:22,808 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 [2022-11-19 07:05:22,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:22,848 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-19 07:05:22,849 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 1 case distinctions, treesize of input 30 treesize of output 42 [2022-11-19 07:05:22,859 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 [2022-11-19 07:05:22,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:22,885 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-19 07:05:22,885 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 1 case distinctions, treesize of input 30 treesize of output 32 [2022-11-19 07:05:22,898 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 [2022-11-19 07:05:22,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:22,961 INFO L321 Elim1Store]: treesize reduction 52, result has 41.6 percent of original size [2022-11-19 07:05:22,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 74 [2022-11-19 07:05:22,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:23,009 INFO L321 Elim1Store]: treesize reduction 72, result has 19.1 percent of original size [2022-11-19 07:05:23,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 44 [2022-11-19 07:05:23,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:23,116 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 [2022-11-19 07:05:23,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:23,124 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 [2022-11-19 07:05:23,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:23,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:23,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-11-19 07:05:23,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:23,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:23,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:05:23,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 28 [2022-11-19 07:05:23,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:23,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:23,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-11-19 07:05:23,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:23,277 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 [2022-11-19 07:05:23,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:23,289 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 [2022-11-19 07:05:23,376 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:05:23,490 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:05:23,524 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:05:23,559 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:05:23,732 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:05:23,775 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:05:23,898 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:05:24,016 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:05:24,077 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:05:24,083 INFO L197 IcfgInterpreter]: Interpreting procedure append with input of size 37 for LOIs [2022-11-19 07:05:24,177 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 [2022-11-19 07:05:24,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:24,195 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 19 [2022-11-19 07:05:24,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:24,207 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 19 treesize of output 19 [2022-11-19 07:05:24,226 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 [2022-11-19 07:05:24,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:24,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:24,244 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:05:24,244 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 29 treesize of output 31 [2022-11-19 07:05:24,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:24,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:24,265 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:05:24,266 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 29 treesize of output 31 [2022-11-19 07:05:24,290 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 [2022-11-19 07:05:24,296 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 [2022-11-19 07:05:24,303 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 [2022-11-19 07:05:24,317 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 [2022-11-19 07:05:24,329 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 [2022-11-19 07:05:24,343 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 [2022-11-19 07:05:24,365 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 [2022-11-19 07:05:24,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:24,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:24,378 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 30 treesize of output 32 [2022-11-19 07:05:24,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:24,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:24,397 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 30 treesize of output 32 [2022-11-19 07:05:24,419 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 [2022-11-19 07:05:24,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:24,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:24,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:24,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:24,438 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:05:24,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 44 [2022-11-19 07:05:24,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:24,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:24,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:24,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:24,461 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:05:24,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 44 [2022-11-19 07:05:24,471 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:05:28,279 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10495#(and (= (select (select |#memory_$Pointer$.base| append_~node~0.base) (+ 5 append_~node~0.offset)) 0) (<= 0 (+ append_~input 128)) (= append_~node~0.offset 0) (<= 0 (+ 128 |append_#in~input|)) (= (select (select |#memory_$Pointer$.base| append_~node~0.base) (+ append_~node~0.offset 1)) (select (select |#memory_$Pointer$.base| append_~head.base) (+ append_~head.offset 4))) (<= (+ 8 append_~head.offset) (select |#length| append_~head.base)) (<= append_~head.offset 0) (= (select (select |#memory_$Pointer$.offset| append_~node~0.base) (+ 5 append_~node~0.offset)) 0) (= (select (select |#memory_$Pointer$.offset| append_~head.base) (+ append_~head.offset 4)) |append_#t~mem60.offset|) (<= 0 append_~head.offset) (= |append_#in~head.offset| 0) (= (select (select |#memory_$Pointer$.offset| append_~node~0.base) (+ append_~node~0.offset 1)) (select (select |#memory_$Pointer$.offset| append_~head.base) (+ append_~head.offset 4))) (= |#NULL.offset| 0) (= (select |#valid| append_~head.base) 1) (= (select |#valid| append_~node~0.base) 1) (not (= (select |#valid| |append_#t~mem60.base|) 1)) (<= append_~input 127) (<= |append_#in~input| 127) (= |append_#t~mem60.base| (select (select |#memory_$Pointer$.base| append_~head.base) (+ append_~head.offset 4))) (<= 0 |#StackHeapBarrier|) (<= (+ 9 append_~node~0.offset) (select |#length| append_~node~0.base)) (= |#NULL.base| 0))' at error location [2022-11-19 07:05:28,280 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:05:28,280 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:05:28,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2022-11-19 07:05:28,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932497942] [2022-11-19 07:05:28,280 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:05:28,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-19 07:05:28,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:05:28,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-19 07:05:28,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=2533, Unknown=14, NotChecked=0, Total=2756 [2022-11-19 07:05:28,284 INFO L87 Difference]: Start difference. First operand 411 states and 560 transitions. Second operand has 27 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 23 states have internal predecessors, (60), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:05:30,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:05:30,164 INFO L93 Difference]: Finished difference Result 433 states and 597 transitions. [2022-11-19 07:05:30,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-19 07:05:30,164 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 23 states have internal predecessors, (60), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2022-11-19 07:05:30,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:05:30,167 INFO L225 Difference]: With dead ends: 433 [2022-11-19 07:05:30,167 INFO L226 Difference]: Without dead ends: 433 [2022-11-19 07:05:30,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1204 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=290, Invalid=3236, Unknown=14, NotChecked=0, Total=3540 [2022-11-19 07:05:30,169 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 92 mSDsluCounter, 1539 mSDsCounter, 0 mSdLazyCounter, 1231 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 1789 SdHoareTripleChecker+Invalid, 1491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 242 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:05:30,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 1789 Invalid, 1491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1231 Invalid, 0 Unknown, 242 Unchecked, 1.1s Time] [2022-11-19 07:05:30,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2022-11-19 07:05:30,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 430. [2022-11-19 07:05:30,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 289 states have (on average 1.8719723183391004) internal successors, (541), 407 states have internal predecessors, (541), 19 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (34), 17 states have call predecessors, (34), 19 states have call successors, (34) [2022-11-19 07:05:30,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 594 transitions. [2022-11-19 07:05:30,183 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 594 transitions. Word has length 33 [2022-11-19 07:05:30,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:05:30,184 INFO L495 AbstractCegarLoop]: Abstraction has 430 states and 594 transitions. [2022-11-19 07:05:30,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 23 states have internal predecessors, (60), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:05:30,184 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 594 transitions. [2022-11-19 07:05:30,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-19 07:05:30,185 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:05:30,185 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] [2022-11-19 07:05:30,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2002248-72d5-42f5-8a57-a7307c819f2f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:05:30,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2002248-72d5-42f5-8a57-a7307c819f2f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:05:30,392 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting appendErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-11-19 07:05:30,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:05:30,393 INFO L85 PathProgramCache]: Analyzing trace with hash 828879741, now seen corresponding path program 1 times [2022-11-19 07:05:30,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:05:30,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894181891] [2022-11-19 07:05:30,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:05:30,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:05:30,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:05:31,253 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:05:31,254 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:05:31,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894181891] [2022-11-19 07:05:31,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894181891] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:05:31,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401384264] [2022-11-19 07:05:31,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:05:31,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:05:31,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2002248-72d5-42f5-8a57-a7307c819f2f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:05:31,260 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2002248-72d5-42f5-8a57-a7307c819f2f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:05:31,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2002248-72d5-42f5-8a57-a7307c819f2f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:05:31,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:05:31,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-19 07:05:31,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:05:31,510 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 [2022-11-19 07:05:31,700 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 [2022-11-19 07:05:31,758 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 [2022-11-19 07:05:31,824 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:05:31,825 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 1 case distinctions, treesize of input 23 treesize of output 27 [2022-11-19 07:05:31,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-11-19 07:05:31,904 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:05:31,905 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 1 case distinctions, treesize of input 28 treesize of output 32 [2022-11-19 07:05:32,020 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-19 07:05:32,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:05:32,184 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 07:05:32,184 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 [2022-11-19 07:05:32,234 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 36 treesize of output 32 [2022-11-19 07:05:32,288 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:05:32,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:05:32,299 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_902 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_902) c_append_~head.base) c_append_~head.offset) 0))) is different from false [2022-11-19 07:05:32,568 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:05:32,568 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 2 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 07:05:32,573 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:05:32,578 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:05:32,579 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 72 treesize of output 34 [2022-11-19 07:05:32,584 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 20 treesize of output 18 [2022-11-19 07:05:32,603 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-19 07:05:32,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-11-19 07:05:32,937 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:05:32,937 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 07:05:32,965 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:05:32,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 85 [2022-11-19 07:05:32,974 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 52 treesize of output 48 [2022-11-19 07:05:32,982 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 48 treesize of output 46 [2022-11-19 07:05:33,498 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:05:33,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 61 treesize of output 169 [2022-11-19 07:05:33,865 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-19 07:05:33,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401384264] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:05:33,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [907720051] [2022-11-19 07:05:33,869 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-19 07:05:33,869 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:05:33,869 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:05:33,870 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:05:33,870 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:05:33,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:33,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:33,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 07:05:33,910 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 [2022-11-19 07:05:33,918 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 [2022-11-19 07:05:33,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:33,928 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 30 treesize of output 21 [2022-11-19 07:05:33,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:33,947 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 [2022-11-19 07:05:33,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:33,958 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 [2022-11-19 07:05:33,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:33,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-19 07:05:34,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:34,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:34,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 07:05:34,038 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 [2022-11-19 07:05:34,044 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 [2022-11-19 07:05:34,053 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 [2022-11-19 07:05:34,060 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 [2022-11-19 07:05:34,066 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 [2022-11-19 07:05:34,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:34,102 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 28 treesize of output 23 [2022-11-19 07:05:34,143 INFO L321 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2022-11-19 07:05:34,143 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 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-19 07:05:34,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:34,158 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 28 treesize of output 23 [2022-11-19 07:05:34,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:34,177 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 35 treesize of output 19 [2022-11-19 07:05:34,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:34,189 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 23 [2022-11-19 07:05:34,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:34,201 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 30 treesize of output 23 [2022-11-19 07:05:34,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:34,219 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 35 treesize of output 19 [2022-11-19 07:05:34,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:34,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:34,262 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-19 07:05:34,263 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 30 treesize of output 42 [2022-11-19 07:05:34,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:34,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:34,303 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-19 07:05:34,303 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 30 treesize of output 32 [2022-11-19 07:05:34,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:34,325 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 35 treesize of output 19 [2022-11-19 07:05:34,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:34,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:34,380 INFO L321 Elim1Store]: treesize reduction 72, result has 19.1 percent of original size [2022-11-19 07:05:34,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 44 [2022-11-19 07:05:34,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:34,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:34,449 INFO L321 Elim1Store]: treesize reduction 62, result has 30.3 percent of original size [2022-11-19 07:05:34,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 64 [2022-11-19 07:05:34,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:34,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:34,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-11-19 07:05:34,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:34,516 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 [2022-11-19 07:05:34,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:34,526 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 [2022-11-19 07:05:34,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:34,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:34,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 07:05:34,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:34,617 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 [2022-11-19 07:05:34,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:34,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:34,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-11-19 07:05:34,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:34,670 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 [2022-11-19 07:05:34,772 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:05:34,810 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:05:34,867 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:05:34,926 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:05:34,994 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:05:35,058 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:05:35,099 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:05:35,133 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:05:35,186 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:05:35,193 INFO L197 IcfgInterpreter]: Interpreting procedure append with input of size 37 for LOIs [2022-11-19 07:05:35,606 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:05:51,504 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11628#(and (= 0 (select |old(#valid)| append_~node~0.base)) (not (= 60 |append_#in~input|)) (= |append_#in~head.offset| append_~head.offset) (or (and (exists ((v_DerPreprocessor_23 Int)) (and (not (= (select (select (store |old(#memory_$Pointer$.base)| append_~node~0.base (store (select |old(#memory_$Pointer$.base)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_23)) append_~head.base) (+ append_~head.offset 4)) 0)) (= |#memory_$Pointer$.base| (store |old(#memory_$Pointer$.base)| append_~node~0.base (store (store (store (select |old(#memory_$Pointer$.base)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_23) (+ append_~node~0.offset 1) (select (select (store |old(#memory_$Pointer$.base)| append_~node~0.base (store (select |old(#memory_$Pointer$.base)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_23)) append_~head.base) (+ append_~head.offset 4))) (+ 5 append_~node~0.offset) 0))) (= (select (select (store |old(#memory_$Pointer$.base)| append_~node~0.base (store (select |old(#memory_$Pointer$.base)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_23)) append_~head.base) append_~head.offset) 0))) (exists ((v_DerPreprocessor_24 Int)) (and (= (select (select (store |old(#memory_$Pointer$.offset)| append_~node~0.base (store (select |old(#memory_$Pointer$.offset)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_24)) append_~head.base) append_~head.offset) 0) (= |#memory_$Pointer$.offset| (store |old(#memory_$Pointer$.offset)| append_~node~0.base (store (store (store (select |old(#memory_$Pointer$.offset)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_24) (+ append_~node~0.offset 1) (select (select (store |old(#memory_$Pointer$.offset)| append_~node~0.base (store (select |old(#memory_$Pointer$.offset)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_24)) append_~head.base) (+ append_~head.offset 4))) (+ 5 append_~node~0.offset) 0)))))) (and (exists ((v_DerPreprocessor_23 Int)) (and (= |#memory_$Pointer$.base| (store |old(#memory_$Pointer$.base)| append_~node~0.base (store (store (store (select |old(#memory_$Pointer$.base)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_23) (+ append_~node~0.offset 1) (select (select (store |old(#memory_$Pointer$.base)| append_~node~0.base (store (select |old(#memory_$Pointer$.base)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_23)) append_~head.base) (+ append_~head.offset 4))) (+ 5 append_~node~0.offset) 0))) (= (select (select (store |old(#memory_$Pointer$.base)| append_~node~0.base (store (select |old(#memory_$Pointer$.base)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_23)) append_~head.base) append_~head.offset) 0))) (exists ((v_DerPreprocessor_24 Int)) (and (not (= (select (select (store |old(#memory_$Pointer$.offset)| append_~node~0.base (store (select |old(#memory_$Pointer$.offset)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_24)) append_~head.base) (+ append_~head.offset 4)) 0)) (= (select (select (store |old(#memory_$Pointer$.offset)| append_~node~0.base (store (select |old(#memory_$Pointer$.offset)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_24)) append_~head.base) append_~head.offset) 0) (= |#memory_$Pointer$.offset| (store |old(#memory_$Pointer$.offset)| append_~node~0.base (store (store (store (select |old(#memory_$Pointer$.offset)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_24) (+ append_~node~0.offset 1) (select (select (store |old(#memory_$Pointer$.offset)| append_~node~0.base (store (select |old(#memory_$Pointer$.offset)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_24)) append_~head.base) (+ append_~head.offset 4))) (+ 5 append_~node~0.offset) 0))))))) (not (= append_~node~0.base 0)) (= append_~node~0.offset 0) (<= 0 (+ 128 |append_#in~input|)) (< append_~node~0.base |#StackHeapBarrier|) (not (= 62 |append_#in~input|)) (<= (+ 8 append_~head.offset) (select |#length| append_~head.base)) (= (store |old(#length)| append_~node~0.base 9) |#length|) (= (select (select |#memory_$Pointer$.offset| append_~head.base) (+ append_~head.offset 4)) |append_#t~mem60.offset|) (= |append_#in~head.offset| 0) (= append_~head.base |append_#in~head.base|) (or (not (<= (+ |append_#t~mem60.offset| 9) (select |#length| |append_#t~mem60.base|))) (not (<= 0 (+ |append_#t~mem60.offset| 5)))) (exists ((v_DerPreprocessor_25 Int)) (= |#memory_int| (store |old(#memory_int)| append_~node~0.base (store (store (store (select |old(#memory_int)| append_~node~0.base) append_~node~0.offset append_~input) (+ append_~node~0.offset 1) v_DerPreprocessor_25) (+ 5 append_~node~0.offset) (select (select |#memory_int| append_~node~0.base) (+ 5 append_~node~0.offset)))))) (= |#NULL.offset| 0) (= (select |#valid| append_~head.base) 1) (= |#valid| (store |old(#valid)| append_~node~0.base 1)) (= append_~input |append_#in~input|) (<= |append_#in~input| 127) (= |append_#t~mem60.base| (select (select |#memory_$Pointer$.base| append_~head.base) (+ append_~head.offset 4))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:05:51,504 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:05:51,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:05:51,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 35 [2022-11-19 07:05:51,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719665007] [2022-11-19 07:05:51,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:05:51,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-19 07:05:51,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:05:51,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-19 07:05:51,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=2799, Unknown=2, NotChecked=110, Total=3306 [2022-11-19 07:05:51,508 INFO L87 Difference]: Start difference. First operand 430 states and 594 transitions. Second operand has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 30 states have internal predecessors, (76), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:05:54,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:05:54,604 INFO L93 Difference]: Finished difference Result 521 states and 575 transitions. [2022-11-19 07:05:54,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-19 07:05:54,605 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 30 states have internal predecessors, (76), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 34 [2022-11-19 07:05:54,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:05:54,608 INFO L225 Difference]: With dead ends: 521 [2022-11-19 07:05:54,608 INFO L226 Difference]: Without dead ends: 521 [2022-11-19 07:05:54,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 61 SyntacticMatches, 6 SemanticMatches, 66 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1786 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=566, Invalid=3858, Unknown=2, NotChecked=130, Total=4556 [2022-11-19 07:05:54,611 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 619 mSDsluCounter, 1944 mSDsCounter, 0 mSdLazyCounter, 1998 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 619 SdHoareTripleChecker+Valid, 2091 SdHoareTripleChecker+Invalid, 3029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 925 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:05:54,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [619 Valid, 2091 Invalid, 3029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1998 Invalid, 0 Unknown, 925 Unchecked, 1.9s Time] [2022-11-19 07:05:54,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-11-19 07:05:54,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 387. [2022-11-19 07:05:54,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 249 states have (on average 1.9678714859437751) internal successors, (490), 367 states have internal predecessors, (490), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-19 07:05:54,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 526 transitions. [2022-11-19 07:05:54,625 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 526 transitions. Word has length 34 [2022-11-19 07:05:54,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:05:54,625 INFO L495 AbstractCegarLoop]: Abstraction has 387 states and 526 transitions. [2022-11-19 07:05:54,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 30 states have internal predecessors, (76), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:05:54,626 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 526 transitions. [2022-11-19 07:05:54,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-19 07:05:54,627 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:05:54,627 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-11-19 07:05:54,634 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2002248-72d5-42f5-8a57-a7307c819f2f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-19 07:05:54,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2002248-72d5-42f5-8a57-a7307c819f2f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-19 07:05:54,835 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting appendErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-11-19 07:05:54,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:05:54,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1786728893, now seen corresponding path program 1 times [2022-11-19 07:05:54,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:05:54,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176460447] [2022-11-19 07:05:54,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:05:54,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:05:54,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:05:56,399 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:05:56,399 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:05:56,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176460447] [2022-11-19 07:05:56,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176460447] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:05:56,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948278309] [2022-11-19 07:05:56,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:05:56,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:05:56,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2002248-72d5-42f5-8a57-a7307c819f2f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:05:56,402 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2002248-72d5-42f5-8a57-a7307c819f2f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:05:56,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2002248-72d5-42f5-8a57-a7307c819f2f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 07:05:56,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:05:56,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-19 07:05:56,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:05:56,738 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 [2022-11-19 07:05:57,043 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 [2022-11-19 07:05:57,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:05:57,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:57,348 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 26 treesize of output 28 [2022-11-19 07:05:57,376 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-19 07:05:57,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 24 [2022-11-19 07:05:57,460 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 36 treesize of output 36 [2022-11-19 07:05:57,466 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 35 treesize of output 35 [2022-11-19 07:05:57,603 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 36 treesize of output 36 [2022-11-19 07:05:57,615 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 35 treesize of output 35 [2022-11-19 07:05:57,648 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 36 treesize of output 36 [2022-11-19 07:05:57,654 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 35 treesize of output 35 [2022-11-19 07:05:57,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:05:57,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-19 07:05:57,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:05:57,736 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:05:57,736 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 32 treesize of output 17 [2022-11-19 07:05:57,773 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:05:57,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:05:57,870 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_append_~head.offset 4))) (and (forall ((v_ArrVal_1118 (Array Int Int))) (<= 0 (+ 5 (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_1118) c_append_~head.base) .cse0)))) (forall ((v_ArrVal_1119 (Array Int Int)) (v_ArrVal_1118 (Array Int Int))) (<= (+ 9 (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_1118) c_append_~head.base) .cse0)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_1119) c_append_~head.base) .cse0)))))) is different from false [2022-11-19 07:05:58,322 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:05:58,322 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 93 treesize of output 94 [2022-11-19 07:05:58,337 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:05:58,337 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 86 [2022-11-19 07:05:58,355 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-19 07:05:58,356 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 140 treesize of output 113 [2022-11-19 07:05:58,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:05:58,364 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 172 treesize of output 142 [2022-11-19 07:05:58,396 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:05:58,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 207 treesize of output 221 [2022-11-19 07:05:58,421 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 210 treesize of output 186 [2022-11-19 07:05:58,431 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 169 treesize of output 153 [2022-11-19 07:05:58,463 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:05:58,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 169 treesize of output 187 [2022-11-19 07:05:58,484 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 149 treesize of output 145 [2022-11-19 07:06:00,767 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:06:00,767 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 [2022-11-19 07:06:00,777 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:06:00,778 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 38 treesize of output 39 [2022-11-19 07:06:00,796 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:06:00,797 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 68 treesize of output 67 [2022-11-19 07:06:00,820 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:06:00,820 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 108 treesize of output 101 [2022-11-19 07:06:00,830 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 86 treesize of output 78 [2022-11-19 07:06:00,839 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 42 treesize of output 34 [2022-11-19 07:06:00,985 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:06:00,985 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 24 treesize of output 25 [2022-11-19 07:06:00,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:06:01,001 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:06:01,001 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 22 treesize of output 21 [2022-11-19 07:06:09,408 WARN L233 SmtUtils]: Spent 8.29s on a formula simplification. DAG size of input: 49 DAG size of output: 45 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:06:09,578 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 97 treesize of output 93 [2022-11-19 07:06:10,220 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 7 not checked. [2022-11-19 07:06:10,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948278309] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:06:10,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [972420168] [2022-11-19 07:06:10,223 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2022-11-19 07:06:10,223 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:06:10,224 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:06:10,224 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:06:10,224 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:06:10,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:06:10,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:06:10,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 07:06:10,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:06:10,259 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 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-19 07:06:10,267 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 11 treesize of output 7 [2022-11-19 07:06:10,274 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 [2022-11-19 07:06:10,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:06:10,294 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 [2022-11-19 07:06:10,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:06:10,305 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 [2022-11-19 07:06:10,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:06:10,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-19 07:06:10,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:06:10,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:06:10,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:06:10,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 28 [2022-11-19 07:06:10,381 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 [2022-11-19 07:06:10,386 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 [2022-11-19 07:06:10,395 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 [2022-11-19 07:06:10,402 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 [2022-11-19 07:06:10,408 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 [2022-11-19 07:06:10,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:06:10,452 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 19 treesize of output 19 [2022-11-19 07:06:10,459 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 [2022-11-19 07:06:10,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:06:10,469 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 19 treesize of output 19 [2022-11-19 07:06:10,477 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 [2022-11-19 07:06:10,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:06:10,515 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-19 07:06:10,516 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 2 case distinctions, treesize of input 29 treesize of output 41 [2022-11-19 07:06:10,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:06:10,560 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-19 07:06:10,560 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 2 case distinctions, treesize of input 29 treesize of output 41 [2022-11-19 07:06:10,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:06:10,722 INFO L321 Elim1Store]: treesize reduction 92, result has 43.9 percent of original size [2022-11-19 07:06:10,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 176 treesize of output 174 [2022-11-19 07:06:10,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:06:10,824 INFO L321 Elim1Store]: treesize reduction 84, result has 36.4 percent of original size [2022-11-19 07:06:10,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 172 treesize of output 152 [2022-11-19 07:06:10,840 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 [2022-11-19 07:06:11,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:06:11,571 INFO L321 Elim1Store]: treesize reduction 520, result has 25.0 percent of original size [2022-11-19 07:06:11,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 2 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 48 case distinctions, treesize of input 1090 treesize of output 1001 [2022-11-19 07:06:11,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:06:12,196 INFO L321 Elim1Store]: treesize reduction 546, result has 26.7 percent of original size [2022-11-19 07:06:12,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 2 disjoint index pairs (out of 45 index pairs), introduced 11 new quantified variables, introduced 48 case distinctions, treesize of input 1029 treesize of output 889