./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext2/length_test03-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext2/length_test03-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7 --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 6e9221de91e231efa38b63f264828813e89f68c8ac306a629b3513c0e7bf1ed0 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:30:54,799 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:30:54,803 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:30:54,870 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:30:54,871 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:30:54,877 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:30:54,880 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:30:54,885 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:30:54,888 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:30:54,896 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:30:54,897 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:30:54,900 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:30:54,900 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:30:54,904 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:30:54,907 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:30:54,914 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:30:54,916 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:30:54,917 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:30:54,921 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:30:54,931 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:30:54,933 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:30:54,935 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:30:54,939 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:30:54,941 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:30:54,952 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:30:54,953 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:30:54,954 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:30:54,956 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:30:54,957 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:30:54,959 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:30:54,960 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:30:54,961 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:30:54,964 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:30:54,966 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:30:54,968 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:30:54,968 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:30:54,969 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:30:54,970 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:30:54,970 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:30:54,971 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:30:54,972 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:30:54,974 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-25 18:30:55,028 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:30:55,028 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:30:55,029 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:30:55,030 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:30:55,031 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:30:55,032 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:30:55,032 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:30:55,032 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:30:55,033 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:30:55,033 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:30:55,034 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:30:55,034 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:30:55,035 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:30:55,035 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:30:55,035 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:30:55,036 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:30:55,036 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:30:55,036 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:30:55,037 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-25 18:30:55,038 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-25 18:30:55,038 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:30:55,038 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:30:55,039 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 18:30:55,040 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:30:55,041 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:30:55,041 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:30:55,041 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-25 18:30:55,042 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-25 18:30:55,042 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-25 18:30:55,042 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:30:55,043 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 18:30:55,043 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:30:55,043 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:30:55,044 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:30:55,044 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:30:55,044 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:30:55,045 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:30:55,045 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:30:55,045 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:30:55,045 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:30:55,046 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:30:55,046 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:30:55,046 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6e9221de91e231efa38b63f264828813e89f68c8ac306a629b3513c0e7bf1ed0 [2021-11-25 18:30:55,335 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:30:55,373 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:30:55,376 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:30:55,378 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:30:55,378 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:30:55,380 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/memsafety-ext2/length_test03-1.i [2021-11-25 18:30:55,477 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/data/d7f32b2c6/81e5e8de450a4ba295bf3f1bbbaafd5a/FLAG1b5b8bc7c [2021-11-25 18:30:56,177 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:30:56,178 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/sv-benchmarks/c/memsafety-ext2/length_test03-1.i [2021-11-25 18:30:56,194 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/data/d7f32b2c6/81e5e8de450a4ba295bf3f1bbbaafd5a/FLAG1b5b8bc7c [2021-11-25 18:30:56,456 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/data/d7f32b2c6/81e5e8de450a4ba295bf3f1bbbaafd5a [2021-11-25 18:30:56,460 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:30:56,463 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:30:56,468 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:30:56,468 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:30:56,472 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:30:56,474 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:30:56" (1/1) ... [2021-11-25 18:30:56,476 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@600d1c25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:56, skipping insertion in model container [2021-11-25 18:30:56,477 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:30:56" (1/1) ... [2021-11-25 18:30:56,485 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:30:56,556 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:30:57,130 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:30:57,144 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:30:57,230 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:30:57,274 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:30:57,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:57 WrapperNode [2021-11-25 18:30:57,274 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:30:57,276 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:30:57,276 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:30:57,276 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:30:57,285 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:57" (1/1) ... [2021-11-25 18:30:57,329 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:57" (1/1) ... [2021-11-25 18:30:57,358 INFO L137 Inliner]: procedures = 123, calls = 38, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 98 [2021-11-25 18:30:57,359 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:30:57,360 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:30:57,360 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:30:57,360 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:30:57,371 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:57" (1/1) ... [2021-11-25 18:30:57,371 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:57" (1/1) ... [2021-11-25 18:30:57,392 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:57" (1/1) ... [2021-11-25 18:30:57,393 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:57" (1/1) ... [2021-11-25 18:30:57,404 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:57" (1/1) ... [2021-11-25 18:30:57,414 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:57" (1/1) ... [2021-11-25 18:30:57,421 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:57" (1/1) ... [2021-11-25 18:30:57,425 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:30:57,442 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:30:57,443 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:30:57,443 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:30:57,444 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:57" (1/1) ... [2021-11-25 18:30:57,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:30:57,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:30:57,480 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:30:57,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:30:57,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 18:30:57,539 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 18:30:57,539 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:30:57,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 18:30:57,540 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 18:30:57,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 18:30:57,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:30:57,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:30:57,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:30:57,541 INFO L130 BoogieDeclarations]: Found specification of procedure append [2021-11-25 18:30:57,541 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2021-11-25 18:30:57,652 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:30:57,654 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:30:58,145 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:30:58,342 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:30:58,342 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-25 18:30:58,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:30:58 BoogieIcfgContainer [2021-11-25 18:30:58,348 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:30:58,350 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:30:58,350 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:30:58,354 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:30:58,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:30:56" (1/3) ... [2021-11-25 18:30:58,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@496092d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:30:58, skipping insertion in model container [2021-11-25 18:30:58,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:57" (2/3) ... [2021-11-25 18:30:58,357 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@496092d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:30:58, skipping insertion in model container [2021-11-25 18:30:58,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:30:58" (3/3) ... [2021-11-25 18:30:58,359 INFO L111 eAbstractionObserver]: Analyzing ICFG length_test03-1.i [2021-11-25 18:30:58,364 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:30:58,364 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 59 error locations. [2021-11-25 18:30:58,417 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:30:58,428 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 18:30:58,428 INFO L340 AbstractCegarLoop]: Starting to check reachability of 59 error locations. [2021-11-25 18:30:58,457 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 49 states have (on average 2.3469387755102042) internal successors, (115), 108 states have internal predecessors, (115), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:30:58,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-11-25 18:30:58,473 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:30:58,477 INFO L514 BasicCegarLoop]: trace histogram [1, 1] [2021-11-25 18:30:58,478 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-25 18:30:58,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:30:58,494 INFO L85 PathProgramCache]: Analyzing trace with hash 6824, now seen corresponding path program 1 times [2021-11-25 18:30:58,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:30:58,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299746633] [2021-11-25 18:30:58,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:30:58,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:30:58,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:30:58,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:30:58,759 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:30:58,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299746633] [2021-11-25 18:30:58,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299746633] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:30:58,762 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:30:58,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-25 18:30:58,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446212655] [2021-11-25 18:30:58,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:30:58,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:30:58,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:30:58,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:30:58,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:30:58,818 INFO L87 Difference]: Start difference. First operand has 112 states, 49 states have (on average 2.3469387755102042) internal successors, (115), 108 states have internal predecessors, (115), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 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) [2021-11-25 18:30:59,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:30:59,124 INFO L93 Difference]: Finished difference Result 144 states and 153 transitions. [2021-11-25 18:30:59,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:30:59,127 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 [2021-11-25 18:30:59,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:30:59,145 INFO L225 Difference]: With dead ends: 144 [2021-11-25 18:30:59,146 INFO L226 Difference]: Without dead ends: 143 [2021-11-25 18:30:59,149 INFO L932 BasicCegarLoop]: 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 [2021-11-25 18:30:59,154 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 44 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:30:59,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 131 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:30:59,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-11-25 18:30:59,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 109. [2021-11-25 18:30:59,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 49 states have (on average 2.2653061224489797) internal successors, (111), 105 states have internal predecessors, (111), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:30:59,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 115 transitions. [2021-11-25 18:30:59,237 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 115 transitions. Word has length 2 [2021-11-25 18:30:59,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:30:59,239 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 115 transitions. [2021-11-25 18:30:59,239 INFO L471 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) [2021-11-25 18:30:59,239 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 115 transitions. [2021-11-25 18:30:59,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-11-25 18:30:59,240 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:30:59,240 INFO L514 BasicCegarLoop]: trace histogram [1, 1] [2021-11-25 18:30:59,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:30:59,241 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-25 18:30:59,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:30:59,247 INFO L85 PathProgramCache]: Analyzing trace with hash 6825, now seen corresponding path program 1 times [2021-11-25 18:30:59,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:30:59,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865123913] [2021-11-25 18:30:59,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:30:59,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:30:59,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:30:59,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:30:59,351 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:30:59,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865123913] [2021-11-25 18:30:59,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865123913] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:30:59,352 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:30:59,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-25 18:30:59,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842087528] [2021-11-25 18:30:59,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:30:59,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:30:59,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:30:59,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:30:59,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:30:59,359 INFO L87 Difference]: Start difference. First operand 109 states and 115 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) [2021-11-25 18:30:59,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:30:59,506 INFO L93 Difference]: Finished difference Result 109 states and 116 transitions. [2021-11-25 18:30:59,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:30:59,509 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 [2021-11-25 18:30:59,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:30:59,513 INFO L225 Difference]: With dead ends: 109 [2021-11-25 18:30:59,513 INFO L226 Difference]: Without dead ends: 109 [2021-11-25 18:30:59,514 INFO L932 BasicCegarLoop]: 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 [2021-11-25 18:30:59,520 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 8 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:30:59,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 146 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:30:59,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-25 18:30:59,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2021-11-25 18:30:59,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 103 states have internal predecessors, (109), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:30:59,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 113 transitions. [2021-11-25 18:30:59,544 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 113 transitions. Word has length 2 [2021-11-25 18:30:59,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:30:59,544 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 113 transitions. [2021-11-25 18:30:59,545 INFO L471 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) [2021-11-25 18:30:59,550 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 113 transitions. [2021-11-25 18:30:59,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-25 18:30:59,552 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:30:59,552 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-25 18:30:59,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 18:30:59,553 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-25 18:30:59,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:30:59,554 INFO L85 PathProgramCache]: Analyzing trace with hash 6562959, now seen corresponding path program 1 times [2021-11-25 18:30:59,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:30:59,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503321452] [2021-11-25 18:30:59,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:30:59,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:30:59,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:30:59,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:30:59,667 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:30:59,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503321452] [2021-11-25 18:30:59,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503321452] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:30:59,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:30:59,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:30:59,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760826999] [2021-11-25 18:30:59,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:30:59,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:30:59,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:30:59,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:30:59,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:30:59,673 INFO L87 Difference]: Start difference. First operand 107 states and 113 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:30:59,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:30:59,838 INFO L93 Difference]: Finished difference Result 122 states and 130 transitions. [2021-11-25 18:30:59,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:30:59,840 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-11-25 18:30:59,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:30:59,841 INFO L225 Difference]: With dead ends: 122 [2021-11-25 18:30:59,842 INFO L226 Difference]: Without dead ends: 122 [2021-11-25 18:30:59,843 INFO L932 BasicCegarLoop]: 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 [2021-11-25 18:30:59,845 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 22 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:30:59,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 134 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:30:59,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-25 18:30:59,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 109. [2021-11-25 18:30:59,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 53 states have (on average 2.150943396226415) internal successors, (114), 105 states have internal predecessors, (114), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:30:59,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 118 transitions. [2021-11-25 18:30:59,895 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 118 transitions. Word has length 4 [2021-11-25 18:30:59,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:30:59,895 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 118 transitions. [2021-11-25 18:30:59,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:30:59,896 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 118 transitions. [2021-11-25 18:30:59,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-25 18:30:59,896 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:30:59,896 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-25 18:30:59,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 18:30:59,897 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-25 18:30:59,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:30:59,898 INFO L85 PathProgramCache]: Analyzing trace with hash 6562960, now seen corresponding path program 1 times [2021-11-25 18:30:59,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:30:59,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131154362] [2021-11-25 18:30:59,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:30:59,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:30:59,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:30:59,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:30:59,957 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:30:59,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131154362] [2021-11-25 18:30:59,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131154362] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:30:59,958 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:30:59,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:30:59,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289864737] [2021-11-25 18:30:59,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:30:59,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:30:59,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:30:59,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:30:59,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:30:59,960 INFO L87 Difference]: Start difference. First operand 109 states and 118 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:31:00,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:31:00,092 INFO L93 Difference]: Finished difference Result 109 states and 119 transitions. [2021-11-25 18:31:00,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:31:00,093 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-11-25 18:31:00,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:31:00,094 INFO L225 Difference]: With dead ends: 109 [2021-11-25 18:31:00,094 INFO L226 Difference]: Without dead ends: 109 [2021-11-25 18:31:00,095 INFO L932 BasicCegarLoop]: 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 [2021-11-25 18:31:00,107 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 3 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:31:00,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 145 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:31:00,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-25 18:31:00,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2021-11-25 18:31:00,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 53 states have (on average 2.1132075471698113) internal successors, (112), 103 states have internal predecessors, (112), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:31:00,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 116 transitions. [2021-11-25 18:31:00,125 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 116 transitions. Word has length 4 [2021-11-25 18:31:00,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:31:00,126 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 116 transitions. [2021-11-25 18:31:00,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:31:00,126 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 116 transitions. [2021-11-25 18:31:00,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 18:31:00,127 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:31:00,127 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:31:00,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 18:31:00,128 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting appendErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-25 18:31:00,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:31:00,128 INFO L85 PathProgramCache]: Analyzing trace with hash 152914734, now seen corresponding path program 1 times [2021-11-25 18:31:00,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:31:00,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939962640] [2021-11-25 18:31:00,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:31:00,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:31:00,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:31:00,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:31:00,276 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:31:00,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939962640] [2021-11-25 18:31:00,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939962640] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:31:00,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:31:00,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:31:00,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496059479] [2021-11-25 18:31:00,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:31:00,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:31:00,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:31:00,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:31:00,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:31:00,279 INFO L87 Difference]: Start difference. First operand 107 states and 116 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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) [2021-11-25 18:31:00,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:31:00,387 INFO L93 Difference]: Finished difference Result 102 states and 111 transitions. [2021-11-25 18:31:00,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:31:00,387 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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 [2021-11-25 18:31:00,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:31:00,393 INFO L225 Difference]: With dead ends: 102 [2021-11-25 18:31:00,393 INFO L226 Difference]: Without dead ends: 102 [2021-11-25 18:31:00,393 INFO L932 BasicCegarLoop]: 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 [2021-11-25 18:31:00,394 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 39 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:31:00,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 106 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:31:00,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-25 18:31:00,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2021-11-25 18:31:00,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 53 states have (on average 2.018867924528302) internal successors, (107), 98 states have internal predecessors, (107), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:31:00,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 111 transitions. [2021-11-25 18:31:00,416 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 111 transitions. Word has length 9 [2021-11-25 18:31:00,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:31:00,416 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 111 transitions. [2021-11-25 18:31:00,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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) [2021-11-25 18:31:00,417 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 111 transitions. [2021-11-25 18:31:00,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 18:31:00,417 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:31:00,418 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:31:00,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 18:31:00,418 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting appendErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-25 18:31:00,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:31:00,424 INFO L85 PathProgramCache]: Analyzing trace with hash 152914733, now seen corresponding path program 1 times [2021-11-25 18:31:00,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:31:00,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332053715] [2021-11-25 18:31:00,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:31:00,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:31:00,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:31:00,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:31:00,540 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:31:00,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332053715] [2021-11-25 18:31:00,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332053715] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:31:00,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:31:00,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:31:00,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728896128] [2021-11-25 18:31:00,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:31:00,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:31:00,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:31:00,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:31:00,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:31:00,543 INFO L87 Difference]: Start difference. First operand 102 states and 111 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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) [2021-11-25 18:31:00,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:31:00,642 INFO L93 Difference]: Finished difference Result 97 states and 106 transitions. [2021-11-25 18:31:00,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:31:00,643 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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 [2021-11-25 18:31:00,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:31:00,644 INFO L225 Difference]: With dead ends: 97 [2021-11-25 18:31:00,644 INFO L226 Difference]: Without dead ends: 97 [2021-11-25 18:31:00,644 INFO L932 BasicCegarLoop]: 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 [2021-11-25 18:31:00,647 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 34 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:31:00,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 98 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:31:00,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-25 18:31:00,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2021-11-25 18:31:00,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 53 states have (on average 1.9245283018867925) internal successors, (102), 93 states have internal predecessors, (102), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:31:00,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 106 transitions. [2021-11-25 18:31:00,661 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 106 transitions. Word has length 9 [2021-11-25 18:31:00,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:31:00,661 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 106 transitions. [2021-11-25 18:31:00,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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) [2021-11-25 18:31:00,662 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 106 transitions. [2021-11-25 18:31:00,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 18:31:00,662 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:31:00,663 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:31:00,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 18:31:00,663 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting appendErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-25 18:31:00,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:31:00,665 INFO L85 PathProgramCache]: Analyzing trace with hash 445389526, now seen corresponding path program 1 times [2021-11-25 18:31:00,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:31:00,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062041537] [2021-11-25 18:31:00,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:31:00,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:31:00,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:31:00,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:31:00,855 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:31:00,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062041537] [2021-11-25 18:31:00,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062041537] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:31:00,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:31:00,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:31:00,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344905368] [2021-11-25 18:31:00,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:31:00,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:31:00,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:31:00,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:31:00,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:31:00,858 INFO L87 Difference]: Start difference. First operand 97 states and 106 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 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) [2021-11-25 18:31:01,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:31:01,184 INFO L93 Difference]: Finished difference Result 191 states and 208 transitions. [2021-11-25 18:31:01,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:31:01,185 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 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 10 [2021-11-25 18:31:01,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:31:01,187 INFO L225 Difference]: With dead ends: 191 [2021-11-25 18:31:01,188 INFO L226 Difference]: Without dead ends: 191 [2021-11-25 18:31:01,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:31:01,189 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 204 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:31:01,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 166 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 18:31:01,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-25 18:31:01,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 122. [2021-11-25 18:31:01,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 83 states have (on average 1.819277108433735) internal successors, (151), 117 states have internal predecessors, (151), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:31:01,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 155 transitions. [2021-11-25 18:31:01,201 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 155 transitions. Word has length 10 [2021-11-25 18:31:01,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:31:01,202 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 155 transitions. [2021-11-25 18:31:01,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 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) [2021-11-25 18:31:01,202 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 155 transitions. [2021-11-25 18:31:01,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 18:31:01,203 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:31:01,203 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:31:01,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 18:31:01,204 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting appendErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-25 18:31:01,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:31:01,205 INFO L85 PathProgramCache]: Analyzing trace with hash 445389527, now seen corresponding path program 1 times [2021-11-25 18:31:01,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:31:01,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828605008] [2021-11-25 18:31:01,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:31:01,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:31:01,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:31:01,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:31:01,395 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:31:01,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828605008] [2021-11-25 18:31:01,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828605008] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:31:01,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:31:01,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:31:01,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54802443] [2021-11-25 18:31:01,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:31:01,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:31:01,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:31:01,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:31:01,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:31:01,400 INFO L87 Difference]: Start difference. First operand 122 states and 155 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 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) [2021-11-25 18:31:01,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:31:01,748 INFO L93 Difference]: Finished difference Result 197 states and 216 transitions. [2021-11-25 18:31:01,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:31:01,749 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 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 10 [2021-11-25 18:31:01,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:31:01,751 INFO L225 Difference]: With dead ends: 197 [2021-11-25 18:31:01,751 INFO L226 Difference]: Without dead ends: 197 [2021-11-25 18:31:01,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-25 18:31:01,753 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 249 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:31:01,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 155 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 18:31:01,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-11-25 18:31:01,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 142. [2021-11-25 18:31:01,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 103 states have (on average 1.7864077669902914) internal successors, (184), 137 states have internal predecessors, (184), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:31:01,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 188 transitions. [2021-11-25 18:31:01,761 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 188 transitions. Word has length 10 [2021-11-25 18:31:01,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:31:01,761 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 188 transitions. [2021-11-25 18:31:01,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 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) [2021-11-25 18:31:01,762 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 188 transitions. [2021-11-25 18:31:01,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-25 18:31:01,762 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:31:01,763 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:31:01,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 18:31:01,763 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting appendErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-25 18:31:01,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:31:01,764 INFO L85 PathProgramCache]: Analyzing trace with hash -679097844, now seen corresponding path program 1 times [2021-11-25 18:31:01,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:31:01,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152392417] [2021-11-25 18:31:01,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:31:01,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:31:01,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:31:01,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:31:01,984 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:31:01,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152392417] [2021-11-25 18:31:01,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152392417] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:31:01,984 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:31:01,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-25 18:31:01,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311066674] [2021-11-25 18:31:01,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:31:01,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 18:31:01,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:31:01,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 18:31:01,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:31:01,987 INFO L87 Difference]: Start difference. First operand 142 states and 188 transitions. Second operand has 8 states, 8 states have (on average 2.0) 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) [2021-11-25 18:31:02,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:31:02,255 INFO L93 Difference]: Finished difference Result 158 states and 206 transitions. [2021-11-25 18:31:02,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 18:31:02,256 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) 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 [2021-11-25 18:31:02,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:31:02,258 INFO L225 Difference]: With dead ends: 158 [2021-11-25 18:31:02,259 INFO L226 Difference]: Without dead ends: 158 [2021-11-25 18:31:02,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-25 18:31:02,260 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 19 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:31:02,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 277 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:31:02,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-25 18:31:02,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 148. [2021-11-25 18:31:02,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 108 states have (on average 1.75) internal successors, (189), 142 states have internal predecessors, (189), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:31:02,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 195 transitions. [2021-11-25 18:31:02,268 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 195 transitions. Word has length 17 [2021-11-25 18:31:02,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:31:02,268 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 195 transitions. [2021-11-25 18:31:02,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) 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) [2021-11-25 18:31:02,269 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 195 transitions. [2021-11-25 18:31:02,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-25 18:31:02,270 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:31:02,271 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:31:02,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 18:31:02,271 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting appendErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-25 18:31:02,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:31:02,272 INFO L85 PathProgramCache]: Analyzing trace with hash -360261382, now seen corresponding path program 1 times [2021-11-25 18:31:02,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:31:02,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325230771] [2021-11-25 18:31:02,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:31:02,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:31:02,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:31:02,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:31:02,630 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:31:02,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325230771] [2021-11-25 18:31:02,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325230771] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:31:02,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:31:02,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-25 18:31:02,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530255410] [2021-11-25 18:31:02,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:31:02,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 18:31:02,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:31:02,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 18:31:02,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-25 18:31:02,633 INFO L87 Difference]: Start difference. First operand 148 states and 195 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 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) [2021-11-25 18:31:02,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:31:02,937 INFO L93 Difference]: Finished difference Result 152 states and 199 transitions. [2021-11-25 18:31:02,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 18:31:02,937 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 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 18 [2021-11-25 18:31:02,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:31:02,939 INFO L225 Difference]: With dead ends: 152 [2021-11-25 18:31:02,939 INFO L226 Difference]: Without dead ends: 152 [2021-11-25 18:31:02,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-25 18:31:02,940 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 3 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:31:02,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 308 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 18:31:02,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-25 18:31:02,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2021-11-25 18:31:02,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 110 states have (on average 1.7363636363636363) internal successors, (191), 144 states have internal predecessors, (191), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:31:02,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 197 transitions. [2021-11-25 18:31:02,951 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 197 transitions. Word has length 18 [2021-11-25 18:31:02,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:31:02,952 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 197 transitions. [2021-11-25 18:31:02,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 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) [2021-11-25 18:31:02,952 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 197 transitions. [2021-11-25 18:31:02,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-25 18:31:02,954 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:31:02,954 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:31:02,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 18:31:02,955 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-25 18:31:02,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:31:02,955 INFO L85 PathProgramCache]: Analyzing trace with hash -264587606, now seen corresponding path program 1 times [2021-11-25 18:31:02,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:31:02,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230227235] [2021-11-25 18:31:02,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:31:02,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:31:03,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:31:03,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:31:03,052 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:31:03,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230227235] [2021-11-25 18:31:03,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230227235] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:31:03,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:31:03,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:31:03,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256653645] [2021-11-25 18:31:03,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:31:03,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:31:03,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:31:03,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:31:03,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:31:03,058 INFO L87 Difference]: Start difference. First operand 150 states and 197 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:31:03,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:31:03,112 INFO L93 Difference]: Finished difference Result 126 states and 137 transitions. [2021-11-25 18:31:03,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:31:03,113 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-11-25 18:31:03,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:31:03,115 INFO L225 Difference]: With dead ends: 126 [2021-11-25 18:31:03,115 INFO L226 Difference]: Without dead ends: 126 [2021-11-25 18:31:03,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:31:03,117 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 10 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:31:03,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 146 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:31:03,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-25 18:31:03,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 115. [2021-11-25 18:31:03,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 75 states have (on average 1.5866666666666667) internal successors, (119), 109 states have internal predecessors, (119), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:31:03,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 125 transitions. [2021-11-25 18:31:03,127 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 125 transitions. Word has length 25 [2021-11-25 18:31:03,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:31:03,128 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 125 transitions. [2021-11-25 18:31:03,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:31:03,128 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 125 transitions. [2021-11-25 18:31:03,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-25 18:31:03,129 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:31:03,130 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 18:31:03,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-25 18:31:03,130 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting appendErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-25 18:31:03,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:31:03,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1012682462, now seen corresponding path program 1 times [2021-11-25 18:31:03,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:31:03,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433199760] [2021-11-25 18:31:03,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:31:03,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:31:03,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:31:03,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:31:03,335 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:31:03,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433199760] [2021-11-25 18:31:03,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433199760] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:31:03,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507704935] [2021-11-25 18:31:03,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:31:03,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:31:03,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:31:03,339 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:31:03,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:31:03,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:31:03,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-25 18:31:03,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:31:03,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:31:03,808 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:31:03,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 18:31:03,863 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:31:03,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 18:31:03,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:31:03,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:31:04,199 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:31:04,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507704935] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:31:04,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2010897318] [2021-11-25 18:31:04,222 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2021-11-25 18:31:04,222 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:31:04,227 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:31:04,234 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:31:04,234 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:31:04,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:04,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:04,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:31:04,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:31:04,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:04,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:31:04,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:31:04,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:04,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:31:04,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:04,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:31:04,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:04,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:31:04,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:04,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:04,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:04,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:04,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:04,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:31:04,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:04,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:31:04,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:04,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:04,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 18:31:04,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:04,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:04,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 18:31:04,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:04,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:04,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:04,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 18:31:04,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:04,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:04,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:04,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 18:31:04,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:04,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:31:04,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:04,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:04,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:04,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:04,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:31:04,753 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:31:04,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 40 [2021-11-25 18:31:04,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:31:04,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:31:04,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:31:04,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:31:04,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:31:04,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:04,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:31:04,917 INFO L354 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2021-11-25 18:31:04,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:31:04,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:04,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:31:04,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:04,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:31:04,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:04,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:31:04,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:04,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:31:04,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:04,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:31:05,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:05,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:05,029 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-25 18:31:05,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:31:05,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:05,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:05,067 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-25 18:31:05,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:31:05,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:05,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:05,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:05,121 INFO L354 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2021-11-25 18:31:05,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:31:05,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:05,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:05,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:05,174 INFO L354 Elim1Store]: treesize reduction 66, result has 29.0 percent of original size [2021-11-25 18:31:05,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:31:05,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:05,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:31:05,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:05,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:05,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:05,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:31:05,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:05,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:05,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:05,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:31:05,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:05,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:05,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:05,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:05,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:05,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2021-11-25 18:31:05,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:05,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:05,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:05,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:05,389 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:31:05,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 45 [2021-11-25 18:31:05,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:05,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:05,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:05,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:05,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:05,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2021-11-25 18:31:05,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:05,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:05,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:05,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:31:05,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:05,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:05,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:05,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:31:05,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:05,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:05,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:05,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:05,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:31:05,703 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:31:05,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 40 [2021-11-25 18:31:05,748 INFO L197 IcfgInterpreter]: Interpreting procedure append with input of size 105 for LOIs [2021-11-25 18:31:07,935 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:31:34,681 WARN L227 SmtUtils]: Spent 5.13s on a formula simplification. DAG size of input: 229 DAG size of output: 111 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:31:54,485 WARN L227 SmtUtils]: Spent 5.72s on a formula simplification. DAG size of input: 238 DAG size of output: 117 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:31:54,787 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3163#(and (= 0 (select |old(#valid)| append_~node~0.base)) (= |append_#in~head.offset| append_~head.offset) (= |#memory_$Pointer$.offset| (store |old(#memory_$Pointer$.offset)| append_~node~0.base (store (select |old(#memory_$Pointer$.offset)| append_~node~0.base) append_~node~0.offset (select (select |#memory_$Pointer$.offset| append_~node~0.base) append_~node~0.offset)))) (= |#memory_int| (store |old(#memory_int)| append_~node~0.base (store (select |old(#memory_int)| append_~node~0.base) append_~node~0.offset append_~input))) (not (= append_~node~0.base 0)) (= append_~node~0.offset 0) (<= 0 (+ 128 |append_#in~input|)) (< append_~node~0.base |#StackHeapBarrier|) (= (store |old(#length)| append_~node~0.base 9) |#length|) (= |append_#in~head.offset| 0) (= append_~head.base |append_#in~head.base|) (= |#memory_$Pointer$.base| (store |old(#memory_$Pointer$.base)| append_~node~0.base (store (select |old(#memory_$Pointer$.base)| append_~node~0.base) append_~node~0.offset (select (select |#memory_$Pointer$.base| append_~node~0.base) append_~node~0.offset)))) (= |#NULL.offset| 0) (= |#valid| (store |old(#valid)| append_~node~0.base 1)) (= append_~input |append_#in~input|) (<= |append_#in~input| 127) (not (= (select |#valid| append_~head.base) 1)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:31:54,787 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:31:54,788 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:31:54,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 10 [2021-11-25 18:31:54,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184348561] [2021-11-25 18:31:54,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:31:54,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-25 18:31:54,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:31:54,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-25 18:31:54,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=880, Unknown=13, NotChecked=0, Total=1056 [2021-11-25 18:31:54,790 INFO L87 Difference]: Start difference. First operand 115 states and 125 transitions. Second operand has 11 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 1 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 18:31:55,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:31:55,175 INFO L93 Difference]: Finished difference Result 138 states and 154 transitions. [2021-11-25 18:31:55,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 18:31:55,175 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 1 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 27 [2021-11-25 18:31:55,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:31:55,177 INFO L225 Difference]: With dead ends: 138 [2021-11-25 18:31:55,177 INFO L226 Difference]: Without dead ends: 138 [2021-11-25 18:31:55,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 54 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 47.1s TimeCoverageRelationStatistics Valid=243, Invalid=1150, Unknown=13, NotChecked=0, Total=1406 [2021-11-25 18:31:55,178 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 39 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:31:55,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 331 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 270 Invalid, 0 Unknown, 76 Unchecked, 0.2s Time] [2021-11-25 18:31:55,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-25 18:31:55,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 127. [2021-11-25 18:31:55,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 84 states have (on average 1.5476190476190477) internal successors, (130), 119 states have internal predecessors, (130), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-25 18:31:55,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 142 transitions. [2021-11-25 18:31:55,185 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 142 transitions. Word has length 27 [2021-11-25 18:31:55,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:31:55,186 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 142 transitions. [2021-11-25 18:31:55,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 1 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 18:31:55,186 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 142 transitions. [2021-11-25 18:31:55,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-25 18:31:55,187 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:31:55,187 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 18:31:55,225 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-25 18:31:55,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:31:55,402 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting appendErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-25 18:31:55,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:31:55,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1012682461, now seen corresponding path program 1 times [2021-11-25 18:31:55,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:31:55,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782767178] [2021-11-25 18:31:55,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:31:55,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:31:55,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:31:55,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:31:55,621 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:31:55,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782767178] [2021-11-25 18:31:55,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782767178] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:31:55,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154142144] [2021-11-25 18:31:55,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:31:55,622 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:31:55,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:31:55,624 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:31:55,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:31:55,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:31:55,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-25 18:31:55,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:31:55,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:31:55,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:31:56,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:56,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 18:31:56,036 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:31:56,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-25 18:31:56,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:56,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 12 treesize of output 14 [2021-11-25 18:31:56,283 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-25 18:31:56,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 18 [2021-11-25 18:31:56,334 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:31:56,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:31:56,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154142144] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:31:56,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1798094576] [2021-11-25 18:31:56,798 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2021-11-25 18:31:56,798 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:31:56,799 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:31:56,799 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:31:56,799 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:31:56,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:56,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:56,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:31:56,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:56,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:31:56,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:31:56,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:31:56,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:56,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:31:56,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:56,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:31:56,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:56,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:31:56,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:56,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:56,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:56,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:56,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:56,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:31:56,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:56,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:56,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 18:31:56,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:56,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:56,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 18:31:56,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:56,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:31:57,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:57,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:57,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:57,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 18:31:57,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:57,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:31:57,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:57,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:57,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:57,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 18:31:57,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:57,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:57,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:57,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:57,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:31:57,138 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:31:57,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 40 [2021-11-25 18:31:57,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:31:57,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:31:57,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:31:57,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:31:57,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:31:57,253 INFO L354 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2021-11-25 18:31:57,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:31:57,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:57,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:31:57,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:57,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:31:57,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:57,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:31:57,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:57,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:31:57,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:57,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:31:57,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:57,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:57,347 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-25 18:31:57,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:31:57,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:57,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:57,380 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-25 18:31:57,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:31:57,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:57,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:31:57,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:57,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:57,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:57,471 INFO L354 Elim1Store]: treesize reduction 66, result has 29.0 percent of original size [2021-11-25 18:31:57,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:31:57,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:57,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:57,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:57,513 INFO L354 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2021-11-25 18:31:57,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:31:57,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:57,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:31:57,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:57,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:57,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:57,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:31:57,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:57,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:57,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:57,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:31:57,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:57,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:57,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:57,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:57,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:57,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 18 [2021-11-25 18:31:57,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:57,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:57,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:57,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:57,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:31:57,694 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:31:57,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 40 [2021-11-25 18:31:57,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:57,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:57,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:57,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:31:57,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:57,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:57,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:57,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:57,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:57,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 18 [2021-11-25 18:31:57,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:57,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:57,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:57,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:31:57,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:57,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:57,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:57,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:31:57,898 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:31:57,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 45 [2021-11-25 18:31:57,922 INFO L197 IcfgInterpreter]: Interpreting procedure append with input of size 102 for LOIs [2021-11-25 18:31:59,870 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:32:29,709 WARN L227 SmtUtils]: Spent 5.05s on a formula simplification. DAG size of input: 226 DAG size of output: 109 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:32:52,696 WARN L227 SmtUtils]: Spent 7.39s on a formula simplification. DAG size of input: 235 DAG size of output: 115 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:32:53,145 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3584#(and (= 0 (select |old(#valid)| append_~node~0.base)) (= |append_#in~head.offset| append_~head.offset) (= |#memory_$Pointer$.offset| (store |old(#memory_$Pointer$.offset)| append_~node~0.base (store (select |old(#memory_$Pointer$.offset)| append_~node~0.base) append_~node~0.offset (select (select |#memory_$Pointer$.offset| append_~node~0.base) append_~node~0.offset)))) (= |#memory_int| (store |old(#memory_int)| append_~node~0.base (store (select |old(#memory_int)| append_~node~0.base) append_~node~0.offset append_~input))) (not (= append_~node~0.base 0)) (= append_~node~0.offset 0) (<= 0 (+ 128 |append_#in~input|)) (< (select |#length| append_~head.base) (+ append_~head.offset 4)) (< append_~node~0.base |#StackHeapBarrier|) (= (store |old(#length)| append_~node~0.base 9) |#length|) (= |append_#in~head.offset| 0) (= append_~head.base |append_#in~head.base|) (= |#memory_$Pointer$.base| (store |old(#memory_$Pointer$.base)| append_~node~0.base (store (select |old(#memory_$Pointer$.base)| append_~node~0.base) append_~node~0.offset (select (select |#memory_$Pointer$.base| append_~node~0.base) append_~node~0.offset)))) (= |#NULL.offset| 0) (= |#valid| (store |old(#valid)| append_~node~0.base 1)) (= append_~input |append_#in~input|) (<= |append_#in~input| 127) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:32:53,145 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:32:53,145 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:32:53,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-11-25 18:32:53,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024900585] [2021-11-25 18:32:53,145 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:32:53,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-25 18:32:53,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:32:53,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-25 18:32:53,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1352, Unknown=15, NotChecked=0, Total=1560 [2021-11-25 18:32:53,148 INFO L87 Difference]: Start difference. First operand 127 states and 142 transitions. Second operand has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 11 states have internal predecessors, (46), 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) [2021-11-25 18:32:53,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:32:53,705 INFO L93 Difference]: Finished difference Result 144 states and 159 transitions. [2021-11-25 18:32:53,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 18:32:53,707 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 11 states have internal predecessors, (46), 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 27 [2021-11-25 18:32:53,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:32:53,709 INFO L225 Difference]: With dead ends: 144 [2021-11-25 18:32:53,709 INFO L226 Difference]: Without dead ends: 144 [2021-11-25 18:32:53,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 53.7s TimeCoverageRelationStatistics Valid=226, Invalid=1565, Unknown=15, NotChecked=0, Total=1806 [2021-11-25 18:32:53,711 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 37 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:32:53,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 442 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 396 Invalid, 0 Unknown, 101 Unchecked, 0.4s Time] [2021-11-25 18:32:53,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-11-25 18:32:53,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 142. [2021-11-25 18:32:53,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 98 states have (on average 1.5) internal successors, (147), 134 states have internal predecessors, (147), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-25 18:32:53,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 159 transitions. [2021-11-25 18:32:53,719 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 159 transitions. Word has length 27 [2021-11-25 18:32:53,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:32:53,720 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 159 transitions. [2021-11-25 18:32:53,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 11 states have internal predecessors, (46), 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) [2021-11-25 18:32:53,721 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 159 transitions. [2021-11-25 18:32:53,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-25 18:32:53,722 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:32:53,722 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:32:53,750 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-25 18:32:53,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-25 18:32:53,934 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting appendErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-25 18:32:53,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:32:53,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1174362866, now seen corresponding path program 1 times [2021-11-25 18:32:53,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:32:53,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543692938] [2021-11-25 18:32:53,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:32:53,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:32:54,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:32:54,590 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:32:54,590 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:32:54,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543692938] [2021-11-25 18:32:54,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543692938] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:32:54,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672511834] [2021-11-25 18:32:54,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:32:54,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:32:54,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:32:54,592 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:32:54,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 18:32:54,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:32:54,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-25 18:32:54,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:32:54,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:32:54,843 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:32:54,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-25 18:32:55,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:32:55,148 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:32:55,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:32:55,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:32:55,236 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:32:55,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:32:55,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:32:55,340 INFO L354 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2021-11-25 18:32:55,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:32:55,542 INFO L354 Elim1Store]: treesize reduction 54, result has 36.5 percent of original size [2021-11-25 18:32:55,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:32:55,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:32:55,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:32:55,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:32:55,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:32:55,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 31 treesize of output 13 [2021-11-25 18:32:55,988 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:32:55,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:32:56,025 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_781 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_781) c_append_~head.base) (+ c_append_~head.offset 4))) 1)) is different from false [2021-11-25 18:32:56,533 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:32:56,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-11-25 18:32:56,548 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:32:56,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 122 [2021-11-25 18:32:56,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:32:56,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:32:57,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672511834] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:32:57,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [799774601] [2021-11-25 18:32:57,636 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2021-11-25 18:32:57,636 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:32:57,637 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:32:57,637 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:32:57,637 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:32:57,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:57,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:57,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:32:57,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:32:57,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:32:57,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:57,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:32:57,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:57,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:32:57,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:57,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:32:57,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:57,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:57,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:57,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:57,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:57,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:32:57,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:57,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:32:57,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:57,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:32:57,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:57,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:57,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 18:32:57,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:57,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:57,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 18:32:57,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:57,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:32:57,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:57,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:57,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:57,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 18:32:57,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:57,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:57,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:57,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 18:32:57,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:57,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:57,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:57,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:57,965 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:32:57,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 45 [2021-11-25 18:32:58,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:32:58,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:32:58,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:32:58,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:32:58,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:32:58,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:32:58,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:32:58,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:32:58,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:58,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:32:58,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:58,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:32:58,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:32:58,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:58,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:58,196 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-25 18:32:58,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:32:58,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:32:58,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:58,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:58,228 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-25 18:32:58,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:32:58,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:32:58,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:58,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:58,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:58,281 INFO L354 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2021-11-25 18:32:58,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:32:58,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:58,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:58,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:58,351 INFO L354 Elim1Store]: treesize reduction 56, result has 39.8 percent of original size [2021-11-25 18:32:58,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:32:58,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:58,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:58,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:58,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:58,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:58,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2021-11-25 18:32:58,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:58,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:58,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:58,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:32:58,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:58,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:58,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:58,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:32:58,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:58,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:58,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:58,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:58,868 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:32:58,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 45 [2021-11-25 18:32:58,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:58,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:58,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:58,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:32:59,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:59,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:59,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:59,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:32:59,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:59,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:59,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:59,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:59,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:59,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2021-11-25 18:33:03,163 INFO L197 IcfgInterpreter]: Interpreting procedure append with input of size 31 for LOIs [2021-11-25 18:33:03,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:33:03,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:33:03,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:33:03,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:03,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:03,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:33:03,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:03,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:03,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:03,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:03,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:03,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:03,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:03,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:03,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:03,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:03,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:33:03,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:03,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:03,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:03,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:03,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:03,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:03,390 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:33:03,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:03,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:03,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:03,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:03,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:03,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:03,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:03,412 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:33:03,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:03,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:33:03,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:03,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:03,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:33:03,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:03,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:03,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:03,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:03,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:03,500 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:33:03,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:03,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:33:03,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:03,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:03,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:03,524 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:33:03,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:03,542 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:33:07,243 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4075#(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$.offset| append_~head.base) (+ append_~head.offset 4)) |append_#t~mem8.offset|) (= (select (select |#memory_$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$.offset| append_~node~0.base) (+ 5 append_~node~0.offset)) 0) (<= 0 append_~head.offset) (= |append_#in~head.offset| 0) (not (= (select |#valid| |append_#t~mem8.base|) 1)) (= (select (select |#memory_$Pointer$.offset| append_~node~0.base) (+ append_~node~0.offset 1)) (select (select |#memory_$Pointer$.offset| append_~head.base) (+ append_~head.offset 4))) (= |#NULL.offset| 0) (= (select |#valid| append_~head.base) 1) (= (select |#valid| append_~node~0.base) 1) (<= append_~input 127) (<= |append_#in~input| 127) (= (select (select |#memory_$Pointer$.base| append_~head.base) (+ append_~head.offset 4)) |append_#t~mem8.base|) (<= 0 |#StackHeapBarrier|) (<= (+ 9 append_~node~0.offset) (select |#length| append_~node~0.base)) (= |#NULL.base| 0))' at error location [2021-11-25 18:33:07,244 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:33:07,244 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:33:07,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 26 [2021-11-25 18:33:07,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315911284] [2021-11-25 18:33:07,244 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:33:07,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-25 18:33:07,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:33:07,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-25 18:33:07,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=2840, Unknown=3, NotChecked=108, Total=3192 [2021-11-25 18:33:07,249 INFO L87 Difference]: Start difference. First operand 142 states and 159 transitions. Second operand has 28 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 24 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) [2021-11-25 18:33:08,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:33:08,312 INFO L93 Difference]: Finished difference Result 201 states and 233 transitions. [2021-11-25 18:33:08,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-25 18:33:08,313 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 24 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 [2021-11-25 18:33:08,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:33:08,315 INFO L225 Difference]: With dead ends: 201 [2021-11-25 18:33:08,316 INFO L226 Difference]: Without dead ends: 201 [2021-11-25 18:33:08,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1452 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=301, Invalid=3360, Unknown=3, NotChecked=118, Total=3782 [2021-11-25 18:33:08,319 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 162 mSDsluCounter, 775 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:33:08,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 776 Invalid, 935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 770 Invalid, 0 Unknown, 130 Unchecked, 0.7s Time] [2021-11-25 18:33:08,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-11-25 18:33:08,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 169. [2021-11-25 18:33:08,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 121 states have (on average 1.4545454545454546) internal successors, (176), 157 states have internal predecessors, (176), 8 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (15), 6 states have call predecessors, (15), 8 states have call successors, (15) [2021-11-25 18:33:08,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 199 transitions. [2021-11-25 18:33:08,333 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 199 transitions. Word has length 33 [2021-11-25 18:33:08,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:33:08,334 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 199 transitions. [2021-11-25 18:33:08,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 24 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) [2021-11-25 18:33:08,335 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 199 transitions. [2021-11-25 18:33:08,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-25 18:33:08,340 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:33:08,340 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:33:08,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 18:33:08,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-25 18:33:08,553 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting appendErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-25 18:33:08,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:33:08,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1174362867, now seen corresponding path program 1 times [2021-11-25 18:33:08,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:33:08,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426702644] [2021-11-25 18:33:08,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:33:08,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:33:08,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:33:09,397 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:33:09,397 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:33:09,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426702644] [2021-11-25 18:33:09,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426702644] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:33:09,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47528509] [2021-11-25 18:33:09,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:33:09,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:33:09,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:33:09,398 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:33:09,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 18:33:09,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:33:09,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-25 18:33:09,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:33:09,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:09,631 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:33:09,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-25 18:33:09,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:33:09,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:33:10,082 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:33:10,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:10,108 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:33:10,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:10,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:10,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:10,360 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:33:10,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:10,384 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:33:10,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:10,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 11 [2021-11-25 18:33:10,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:33:10,858 INFO L354 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2021-11-25 18:33:10,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:11,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:11,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:11,231 INFO L354 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2021-11-25 18:33:11,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:11,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:11,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:11,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:11,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:11,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:11,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:11,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:33:11,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:11,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:33:11,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:11,775 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:33:11,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:33:11,917 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_968 (Array Int Int))) (<= 0 (+ (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_968) c_append_~head.base) (+ c_append_~head.offset 4)) 5))) (forall ((v_ArrVal_968 (Array Int Int)) (v_ArrVal_967 (Array Int Int))) (let ((.cse0 (+ c_append_~head.offset 4))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_968) c_append_~head.base) .cse0) 9) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_967) c_append_~head.base) .cse0)))))) is different from false [2021-11-25 18:33:14,534 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:33:14,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 82 treesize of output 83 [2021-11-25 18:33:14,545 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:33:14,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 83 treesize of output 73 [2021-11-25 18:33:14,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:33:14,563 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:33:14,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 103 treesize of output 103 [2021-11-25 18:33:14,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:33:14,583 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:33:14,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 152 treesize of output 140 [2021-11-25 18:33:14,615 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:33:14,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 215 treesize of output 229 [2021-11-25 18:33:14,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 229 treesize of output 209 [2021-11-25 18:33:14,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 209 treesize of output 185 [2021-11-25 18:33:17,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47528509] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:33:17,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2083899734] [2021-11-25 18:33:17,277 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2021-11-25 18:33:17,278 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:33:17,278 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:33:17,279 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:33:17,279 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:33:17,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:17,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:17,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:17,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:17,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:17,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:17,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:17,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:17,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:17,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:17,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:17,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:17,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:33:17,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:17,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:17,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:17,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:17,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:17,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:17,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:17,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:17,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 18:33:17,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:17,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:17,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 18:33:17,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:17,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:17,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:17,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:17,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:17,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 18:33:17,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:17,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:17,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:17,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 18:33:17,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:17,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:17,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:17,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:17,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:17,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:17,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:33:17,541 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:33:17,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 40 [2021-11-25 18:33:17,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:17,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:17,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:17,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:17,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:17,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:33:17,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:33:17,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:33:17,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:33:17,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:17,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:17,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:17,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:17,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:17,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:17,734 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-25 18:33:17,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:17,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:33:17,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:17,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:17,804 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-25 18:33:17,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:17,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:17,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:17,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:17,852 INFO L354 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2021-11-25 18:33:17,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:17,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:33:17,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:17,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:17,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:17,920 INFO L354 Elim1Store]: treesize reduction 56, result has 39.8 percent of original size [2021-11-25 18:33:17,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:17,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:17,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:17,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:17,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:17,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:17,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 18 [2021-11-25 18:33:17,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:17,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:17,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:17,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:33:17,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:17,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:17,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:17,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:33:18,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:18,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:18,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:18,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:18,444 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:33:18,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 45 [2021-11-25 18:33:18,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:18,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:18,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:18,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:33:18,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:18,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:18,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:18,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:18,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:18,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 18 [2021-11-25 18:33:18,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:18,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:18,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:18,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:33:22,211 INFO L197 IcfgInterpreter]: Interpreting procedure append with input of size 31 for LOIs [2021-11-25 18:33:22,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:33:22,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:33:22,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:33:22,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:22,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:22,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:22,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:22,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:33:22,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:22,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:22,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:22,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:22,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:22,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:22,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:22,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:22,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:33:22,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:33:22,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:22,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:22,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:22,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:22,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:22,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:22,419 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:33:22,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:22,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:22,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:22,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:22,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:22,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:22,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:22,443 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:33:22,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:22,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:33:22,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:22,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:22,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:22,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:22,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:33:22,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:22,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:22,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:22,523 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:33:22,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:22,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:22,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:22,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:22,541 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:33:22,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:22,558 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:33:26,438 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4653#(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$.offset| append_~head.base) (+ append_~head.offset 4)) |append_#t~mem8.offset|) (= (select (select |#memory_$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$.offset| append_~node~0.base) (+ 5 append_~node~0.offset)) 0) (<= 0 append_~head.offset) (or (< (select |#length| |append_#t~mem8.base|) (+ 9 |append_#t~mem8.offset|)) (< (+ 5 |append_#t~mem8.offset|) 0)) (= |append_#in~head.offset| 0) (= (select (select |#memory_$Pointer$.offset| append_~node~0.base) (+ append_~node~0.offset 1)) (select (select |#memory_$Pointer$.offset| append_~head.base) (+ append_~head.offset 4))) (= |#NULL.offset| 0) (= (select |#valid| append_~head.base) 1) (= (select |#valid| append_~node~0.base) 1) (<= append_~input 127) (<= |append_#in~input| 127) (= (select (select |#memory_$Pointer$.base| append_~head.base) (+ append_~head.offset 4)) |append_#t~mem8.base|) (<= 0 |#StackHeapBarrier|) (<= (+ 9 append_~node~0.offset) (select |#length| append_~node~0.base)) (= |#NULL.base| 0))' at error location [2021-11-25 18:33:26,438 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:33:26,438 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:33:26,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2021-11-25 18:33:26,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246366807] [2021-11-25 18:33:26,439 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:33:26,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-25 18:33:26,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:33:26,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-25 18:33:26,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=2656, Unknown=3, NotChecked=104, Total=2970 [2021-11-25 18:33:26,442 INFO L87 Difference]: Start difference. First operand 169 states and 199 transitions. Second operand has 26 states, 25 states have (on average 2.4) internal successors, (60), 22 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) [2021-11-25 18:33:28,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:33:28,233 INFO L93 Difference]: Finished difference Result 181 states and 213 transitions. [2021-11-25 18:33:28,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-25 18:33:28,234 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.4) internal successors, (60), 22 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 [2021-11-25 18:33:28,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:33:28,236 INFO L225 Difference]: With dead ends: 181 [2021-11-25 18:33:28,237 INFO L226 Difference]: Without dead ends: 181 [2021-11-25 18:33:28,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1098 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=308, Invalid=3853, Unknown=3, NotChecked=126, Total=4290 [2021-11-25 18:33:28,240 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 62 mSDsluCounter, 822 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 825 SdHoareTripleChecker+Invalid, 938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 316 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:33:28,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 825 Invalid, 938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 616 Invalid, 0 Unknown, 316 Unchecked, 0.7s Time] [2021-11-25 18:33:28,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-25 18:33:28,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 179. [2021-11-25 18:33:28,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 131 states have (on average 1.4351145038167938) internal successors, (188), 166 states have internal predecessors, (188), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (15), 6 states have call predecessors, (15), 8 states have call successors, (15) [2021-11-25 18:33:28,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 211 transitions. [2021-11-25 18:33:28,266 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 211 transitions. Word has length 33 [2021-11-25 18:33:28,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:33:28,267 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 211 transitions. [2021-11-25 18:33:28,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.4) internal successors, (60), 22 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) [2021-11-25 18:33:28,268 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 211 transitions. [2021-11-25 18:33:28,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-25 18:33:28,269 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:33:28,270 INFO L514 BasicCegarLoop]: 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, 1, 1, 1] [2021-11-25 18:33:28,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 18:33:28,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-25 18:33:28,470 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting appendErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-25 18:33:28,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:33:28,471 INFO L85 PathProgramCache]: Analyzing trace with hash -575486400, now seen corresponding path program 1 times [2021-11-25 18:33:28,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:33:28,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55702877] [2021-11-25 18:33:28,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:33:28,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:33:28,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:33:30,849 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:33:30,849 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:33:30,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55702877] [2021-11-25 18:33:30,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55702877] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:33:30,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049543695] [2021-11-25 18:33:30,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:33:30,850 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:33:30,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:33:30,857 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:33:30,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 18:33:31,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:33:31,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 75 conjunts are in the unsatisfiable core [2021-11-25 18:33:31,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:33:31,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:31,060 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:33:31,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-25 18:33:31,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:31,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:31,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:31,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:31,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:31,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:31,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:31,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:31,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-11-25 18:33:31,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:31,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:31,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-11-25 18:33:31,786 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:33:31,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 22 treesize of output 33 [2021-11-25 18:33:34,281 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-11-25 18:33:34,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 25 [2021-11-25 18:33:34,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-11-25 18:33:34,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-11-25 18:33:34,432 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:33:34,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:33:34,461 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1165 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_1165) c_append_~head.base) c_append_~head.offset) 0)) (forall ((v_ArrVal_1164 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_1164) c_append_~head.base) c_append_~head.offset) 0))) is different from false [2021-11-25 18:33:42,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049543695] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:33:42,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [986720547] [2021-11-25 18:33:42,893 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2021-11-25 18:33:42,893 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:33:42,894 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:33:42,894 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:33:42,894 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:33:42,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:42,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:42,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:42,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:42,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:42,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:42,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:42,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:42,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:42,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:42,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:42,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:42,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:33:42,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:42,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:42,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:42,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:42,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:42,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:43,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:43,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:43,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 18:33:43,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:43,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:43,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:43,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:43,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 18:33:43,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:43,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:43,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:43,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 18:33:43,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:43,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:43,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:43,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 18:33:43,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:43,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:43,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:43,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:43,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:43,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:43,132 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:33:43,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 45 [2021-11-25 18:33:43,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:43,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:43,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:43,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:43,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:43,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:33:43,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:33:43,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:33:43,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:43,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:43,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:33:43,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:43,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:43,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:33:43,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:43,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:43,285 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-25 18:33:43,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:43,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:43,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:43,311 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-25 18:33:43,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:43,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:43,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:43,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:43,360 INFO L354 Elim1Store]: treesize reduction 56, result has 39.8 percent of original size [2021-11-25 18:33:43,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:43,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:33:43,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:43,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:43,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:43,424 INFO L354 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2021-11-25 18:33:43,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:43,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:43,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:43,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:43,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:33:43,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:43,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:43,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:43,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:33:43,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:43,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:43,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:43,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:43,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:43,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 18 [2021-11-25 18:33:43,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:43,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:43,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:43,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:43,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:33:43,778 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:33:43,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 40 [2021-11-25 18:33:44,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:44,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:44,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:44,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:33:44,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:44,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:44,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:44,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:33:44,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:44,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:44,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:44,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:44,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:44,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 18 [2021-11-25 18:33:45,592 INFO L354 Elim1Store]: treesize reduction 40, result has 29.8 percent of original size [2021-11-25 18:33:45,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 506 treesize of output 503 [2021-11-25 18:33:46,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:46,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:46,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:46,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:46,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:33:46,851 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:33:46,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 40 [2021-11-25 18:33:46,870 INFO L197 IcfgInterpreter]: Interpreting procedure append with input of size 16 for LOIs [2021-11-25 18:33:46,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:46,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:46,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:46,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:46,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:46,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:33:46,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:33:46,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:33:46,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:46,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:46,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:46,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:47,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:33:47,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:47,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:47,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:47,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:47,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:47,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:47,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:47,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:47,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:33:47,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:47,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:47,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:47,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:47,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:47,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:47,082 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:33:47,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:47,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:33:47,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:47,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:47,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:47,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:47,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:47,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:47,105 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:33:47,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:47,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:47,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:47,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:33:47,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:47,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:47,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:47,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:47,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:47,162 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:33:47,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:47,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:33:47,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:47,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:47,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:47,182 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:33:47,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:47,194 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:33:55,645 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5240#(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$.offset| append_~head.base) (+ append_~head.offset 4)) |append_#t~mem8.offset|) (= (select (select |#memory_$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$.offset| append_~node~0.base) (+ 5 append_~node~0.offset)) 0) (<= 0 append_~head.offset) (= |append_#in~head.offset| 0) (not (= (select |#valid| |append_#t~mem8.base|) 1)) (= (select (select |#memory_$Pointer$.offset| append_~node~0.base) (+ append_~node~0.offset 1)) (select (select |#memory_$Pointer$.offset| append_~head.base) (+ append_~head.offset 4))) (= |#NULL.offset| 0) (= (select |#valid| append_~head.base) 1) (= (select |#valid| append_~node~0.base) 1) (<= append_~input 127) (<= |append_#in~input| 127) (= (select (select |#memory_$Pointer$.base| append_~head.base) (+ append_~head.offset 4)) |append_#t~mem8.base|) (<= 0 |#StackHeapBarrier|) (<= (+ 9 append_~node~0.offset) (select |#length| append_~node~0.base)) (= |#NULL.base| 0))' at error location [2021-11-25 18:33:55,645 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:33:55,645 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:33:55,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 29 [2021-11-25 18:33:55,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572494737] [2021-11-25 18:33:55,646 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:33:55,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-25 18:33:55,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:33:55,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-25 18:33:55,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=2908, Unknown=20, NotChecked=110, Total=3306 [2021-11-25 18:33:55,648 INFO L87 Difference]: Start difference. First operand 179 states and 211 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 26 states have internal predecessors, (55), 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) [2021-11-25 18:33:56,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:33:56,514 INFO L93 Difference]: Finished difference Result 243 states and 283 transitions. [2021-11-25 18:33:56,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-25 18:33:56,516 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 26 states have internal predecessors, (55), 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 34 [2021-11-25 18:33:56,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:33:56,519 INFO L225 Difference]: With dead ends: 243 [2021-11-25 18:33:56,519 INFO L226 Difference]: Without dead ends: 243 [2021-11-25 18:33:56,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1209 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=268, Invalid=2908, Unknown=20, NotChecked=110, Total=3306 [2021-11-25 18:33:56,521 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 43 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 301 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:33:56,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 797 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 597 Invalid, 0 Unknown, 301 Unchecked, 0.8s Time] [2021-11-25 18:33:56,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-11-25 18:33:56,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 211. [2021-11-25 18:33:56,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 159 states have (on average 1.389937106918239) internal successors, (221), 195 states have internal predecessors, (221), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (19), 7 states have call predecessors, (19), 10 states have call successors, (19) [2021-11-25 18:33:56,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 250 transitions. [2021-11-25 18:33:56,533 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 250 transitions. Word has length 34 [2021-11-25 18:33:56,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:33:56,533 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 250 transitions. [2021-11-25 18:33:56,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 26 states have internal predecessors, (55), 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) [2021-11-25 18:33:56,534 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 250 transitions. [2021-11-25 18:33:56,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-25 18:33:56,535 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:33:56,535 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 18:33:56,564 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-25 18:33:56,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-25 18:33:56,754 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting appendErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-25 18:33:56,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:33:56,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1262445780, now seen corresponding path program 1 times [2021-11-25 18:33:56,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:33:56,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949192814] [2021-11-25 18:33:56,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:33:56,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:33:56,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:33:57,136 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:33:57,136 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:33:57,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949192814] [2021-11-25 18:33:57,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949192814] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:33:57,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731569300] [2021-11-25 18:33:57,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:33:57,137 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:33:57,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:33:57,138 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:33:57,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 18:33:57,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:33:57,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-25 18:33:57,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:33:57,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:57,362 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:33:57,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-25 18:33:57,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:57,567 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-25 18:33:57,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 20 [2021-11-25 18:33:57,611 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:33:57,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:57,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:57,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:57,669 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:33:57,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:57,749 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-25 18:33:57,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:57,864 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:33:57,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:57,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 30 [2021-11-25 18:33:57,962 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:33:57,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:33:57,984 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1357 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_1357) c_append_~head.base) c_append_~head.offset) 0))) is different from false [2021-11-25 18:33:57,996 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1357 (Array Int Int)) (v_append_~node~0.base_48 Int)) (or (not (= 0 (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_48 v_ArrVal_1357) |c_append_#in~head.base|) |c_append_#in~head.offset|))) (not (= (select |c_#valid| v_append_~node~0.base_48) 0)))) is different from false [2021-11-25 18:33:58,008 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1357 (Array Int Int)) (v_append_~node~0.base_48 Int)) (or (not (= (select |c_#valid| v_append_~node~0.base_48) 0)) (not (= (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_48 v_ArrVal_1357) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) 0)))) is different from false [2021-11-25 18:33:58,135 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-11-25 18:33:58,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:58,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:33:58,142 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-25 18:33:58,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:58,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:58,154 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 18:33:58,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 12 [2021-11-25 18:33:58,404 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-11-25 18:33:58,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-11-25 18:33:58,435 INFO L354 Elim1Store]: treesize reduction 10, result has 71.4 percent of original size [2021-11-25 18:33:58,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:58,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 50 [2021-11-25 18:33:58,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 50 treesize of output 46 [2021-11-25 18:33:58,822 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 18:33:58,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 12 [2021-11-25 18:33:59,065 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2021-11-25 18:33:59,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731569300] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:33:59,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [357575916] [2021-11-25 18:33:59,068 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2021-11-25 18:33:59,068 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:33:59,069 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:33:59,069 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:33:59,069 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:33:59,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:59,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:59,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:59,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:59,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:59,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:59,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:33:59,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:59,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:59,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 18:33:59,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 18:33:59,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:59,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 18:33:59,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 18:33:59,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,334 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:33:59,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 45 [2021-11-25 18:33:59,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:59,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:59,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:59,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:59,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:59,435 INFO L354 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2021-11-25 18:33:59,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:59,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:59,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:59,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:59,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:59,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:59,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,547 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-25 18:33:59,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:59,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,580 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-25 18:33:59,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:59,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:59,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:59,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,674 INFO L354 Elim1Store]: treesize reduction 66, result has 29.0 percent of original size [2021-11-25 18:33:59,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:59,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,727 INFO L354 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2021-11-25 18:33:59,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:33:59,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2021-11-25 18:33:59,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:33:59,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:33:59,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:33:59,873 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:33:59,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 40 [2021-11-25 18:33:59,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:33:59,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:33:59,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:33:59,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2021-11-25 18:34:00,229 INFO L197 IcfgInterpreter]: Interpreting procedure append with input of size 31 for LOIs [2021-11-25 18:34:00,562 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:34:51,891 WARN L227 SmtUtils]: Spent 5.22s on a formula simplification. DAG size of input: 120 DAG size of output: 114 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:35:11,914 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5953#(and (= 0 (select |old(#valid)| append_~node~0.base)) (= |append_#in~head.offset| append_~head.offset) (exists ((v_DerPreprocessor_23 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_23) (+ 5 append_~node~0.offset) (select (select |#memory_int| append_~node~0.base) (+ 5 append_~node~0.offset)))))) (not (= append_~node~0.base 0)) (= append_~node~0.offset 0) (<= 0 (+ 128 |append_#in~input|)) (= (select (select |#memory_$Pointer$.offset| append_~head.base) (+ append_~head.offset 4)) |append_#t~mem8.offset|) (< append_~node~0.base |#StackHeapBarrier|) (<= (+ 8 append_~head.offset) (select |#length| append_~head.base)) (= (store |old(#length)| append_~node~0.base 9) |#length|) (= |append_#in~head.offset| 0) (not (= (select |#valid| |append_#t~mem8.base|) 1)) (= append_~head.base |append_#in~head.base|) (exists ((v_DerPreprocessor_22 Int) (v_DerPreprocessor_21 Int)) (and (= (select (select (store |old(#memory_$Pointer$.offset)| append_~node~0.base (store (select |old(#memory_$Pointer$.offset)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_22)) append_~head.base) append_~head.offset) 0) (= (select (select (store |old(#memory_$Pointer$.base)| append_~node~0.base (store (select |old(#memory_$Pointer$.base)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_21)) append_~head.base) append_~head.offset) 0) (= |#memory_$Pointer$.offset| (store |old(#memory_$Pointer$.offset)| append_~node~0.base (store (store (store (select |old(#memory_$Pointer$.offset)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_22) (+ append_~node~0.offset 1) (select (select (store |old(#memory_$Pointer$.offset)| append_~node~0.base (store (select |old(#memory_$Pointer$.offset)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_22)) append_~head.base) (+ append_~head.offset 4))) (+ 5 append_~node~0.offset) 0))) (= |#memory_$Pointer$.base| (store |old(#memory_$Pointer$.base)| append_~node~0.base (store (store (store (select |old(#memory_$Pointer$.base)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_21) (+ append_~node~0.offset 1) (select (select (store |old(#memory_$Pointer$.base)| append_~node~0.base (store (select |old(#memory_$Pointer$.base)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_21)) append_~head.base) (+ append_~head.offset 4))) (+ 5 append_~node~0.offset) 0))) (or (not (= (select (select (store |old(#memory_$Pointer$.offset)| append_~node~0.base (store (select |old(#memory_$Pointer$.offset)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_22)) append_~head.base) (+ append_~head.offset 4)) 0)) (not (= (select (select (store |old(#memory_$Pointer$.base)| append_~node~0.base (store (select |old(#memory_$Pointer$.base)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_21)) append_~head.base) (+ append_~head.offset 4)) 0))))) (= |#NULL.offset| 0) (= (select |#valid| append_~head.base) 1) (= |#valid| (store |old(#valid)| append_~node~0.base 1)) (= append_~input |append_#in~input|) (<= |append_#in~input| 127) (= (select (select |#memory_$Pointer$.base| append_~head.base) (+ append_~head.offset 4)) |append_#t~mem8.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:35:11,914 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:35:11,914 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:35:11,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 35 [2021-11-25 18:35:11,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737530310] [2021-11-25 18:35:11,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:35:11,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-25 18:35:11,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:35:11,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-25 18:35:11,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=2791, Unknown=27, NotChecked=336, Total=3540 [2021-11-25 18:35:11,918 INFO L87 Difference]: Start difference. First operand 211 states and 250 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) 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) [2021-11-25 18:35:13,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:35:13,088 INFO L93 Difference]: Finished difference Result 251 states and 279 transitions. [2021-11-25 18:35:13,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-25 18:35:13,089 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) 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 [2021-11-25 18:35:13,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:35:13,090 INFO L225 Difference]: With dead ends: 251 [2021-11-25 18:35:13,091 INFO L226 Difference]: Without dead ends: 251 [2021-11-25 18:35:13,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 68 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1719 ImplicationChecksByTransitivity, 72.6s TimeCoverageRelationStatistics Valid=525, Invalid=3869, Unknown=40, NotChecked=396, Total=4830 [2021-11-25 18:35:13,093 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 212 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 878 SdHoareTripleChecker+Invalid, 1413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 566 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:35:13,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 878 Invalid, 1413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 801 Invalid, 0 Unknown, 566 Unchecked, 0.6s Time] [2021-11-25 18:35:13,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-11-25 18:35:13,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 209. [2021-11-25 18:35:13,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 156 states have (on average 1.4102564102564104) internal successors, (220), 195 states have internal predecessors, (220), 9 states have call successors, (9), 7 states have call predecessors, (9), 10 states have return successors, (15), 6 states have call predecessors, (15), 9 states have call successors, (15) [2021-11-25 18:35:13,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 244 transitions. [2021-11-25 18:35:13,106 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 244 transitions. Word has length 34 [2021-11-25 18:35:13,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:35:13,107 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 244 transitions. [2021-11-25 18:35:13,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.111111111111111) 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) [2021-11-25 18:35:13,109 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 244 transitions. [2021-11-25 18:35:13,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-25 18:35:13,115 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:35:13,115 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:35:13,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 18:35:13,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-25 18:35:13,329 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting appendErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-25 18:35:13,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:35:13,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1443273914, now seen corresponding path program 1 times [2021-11-25 18:35:13,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:35:13,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537704584] [2021-11-25 18:35:13,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:35:13,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:35:13,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:35:15,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:35:15,064 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:35:15,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537704584] [2021-11-25 18:35:15,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537704584] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:35:15,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823725694] [2021-11-25 18:35:15,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:35:15,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:35:15,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:35:15,067 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:35:15,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 18:35:15,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:35:15,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 65 conjunts are in the unsatisfiable core [2021-11-25 18:35:15,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:35:15,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:35:15,265 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:35:15,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-25 18:35:15,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:35:15,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:35:15,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:15,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:15,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 23 [2021-11-25 18:35:15,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:15,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:15,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 23 [2021-11-25 18:35:15,873 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:35:15,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 22 treesize of output 33 [2021-11-25 18:35:18,203 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-11-25 18:35:18,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 25 [2021-11-25 18:35:18,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 18 [2021-11-25 18:35:18,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 18 [2021-11-25 18:35:18,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:35:18,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:35:26,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823725694] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:35:26,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1256344928] [2021-11-25 18:35:26,254 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2021-11-25 18:35:26,255 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:35:26,255 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:35:26,255 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:35:26,255 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:35:26,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:35:26,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:35:26,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:35:26,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:35:26,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:35:26,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:35:26,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:35:26,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:35:26,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 18:35:26,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 18:35:26,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:35:26,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:35:26,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 18:35:26,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 18:35:26,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:35:26,486 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:35:26,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 40 [2021-11-25 18:35:26,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:35:26,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:35:26,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:35:26,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:35:26,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:35:26,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:35:26,579 INFO L354 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2021-11-25 18:35:26,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:35:26,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:35:26,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:35:26,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:35:26,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:35:26,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,643 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-25 18:35:26,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:35:26,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:35:26,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,670 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-25 18:35:26,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:35:26,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,705 INFO L354 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2021-11-25 18:35:26,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:35:26,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:35:26,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,789 INFO L354 Elim1Store]: treesize reduction 66, result has 29.0 percent of original size [2021-11-25 18:35:26,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:35:26,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 18 [2021-11-25 18:35:26,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:35:26,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:35:26,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,940 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:35:26,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 45 [2021-11-25 18:35:26,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:26,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:35:27,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:27,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:27,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:27,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:27,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:27,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 18 [2021-11-25 18:35:27,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:27,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:27,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:27,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:35:27,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:27,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:27,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:27,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:27,091 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:35:27,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 45 [2021-11-25 18:35:27,112 INFO L197 IcfgInterpreter]: Interpreting procedure append with input of size 102 for LOIs [2021-11-25 18:35:29,521 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:35:38,284 WARN L227 SmtUtils]: Spent 8.27s on a formula simplification. DAG size of input: 218 DAG size of output: 111 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:36:07,931 WARN L227 SmtUtils]: Spent 5.01s on a formula simplification. DAG size of input: 226 DAG size of output: 111 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:36:29,246 WARN L227 SmtUtils]: Spent 6.56s on a formula simplification. DAG size of input: 235 DAG size of output: 115 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:36:50,616 WARN L227 SmtUtils]: Spent 6.49s on a formula simplification. DAG size of input: 207 DAG size of output: 100 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:37:00,692 WARN L227 SmtUtils]: Spent 8.33s on a formula simplification. DAG size of input: 215 DAG size of output: 108 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:37:00,693 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6653#(and (= 0 (select |old(#valid)| append_~node~0.base)) (= |append_#in~head.offset| append_~head.offset) (exists ((v_DerPreprocessor_33 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_33) (+ 5 append_~node~0.offset) (select (select |#memory_int| append_~node~0.base) (+ 5 append_~node~0.offset)))))) (exists ((v_DerPreprocessor_29 Int) (v_DerPreprocessor_32 Int)) (and (= |#memory_$Pointer$.offset| (store |old(#memory_$Pointer$.offset)| append_~node~0.base (store (store (store (select |old(#memory_$Pointer$.offset)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_32) (+ append_~node~0.offset 1) (select (select (store |old(#memory_$Pointer$.offset)| append_~node~0.base (store (select |old(#memory_$Pointer$.offset)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_32)) append_~head.base) (+ append_~head.offset 4))) (+ 5 append_~node~0.offset) 0))) (= |#memory_$Pointer$.base| (store |old(#memory_$Pointer$.base)| append_~node~0.base (store (store (store (select |old(#memory_$Pointer$.base)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_29) (+ append_~node~0.offset 1) (select (select (store |old(#memory_$Pointer$.base)| append_~node~0.base (store (select |old(#memory_$Pointer$.base)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_29)) append_~head.base) (+ append_~head.offset 4))) (+ 5 append_~node~0.offset) 0))) (or (not (= (select (select (store |old(#memory_$Pointer$.offset)| append_~node~0.base (store (select |old(#memory_$Pointer$.offset)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_32)) append_~head.base) (+ append_~head.offset 4)) 0)) (not (= (select (select (store |old(#memory_$Pointer$.base)| append_~node~0.base (store (select |old(#memory_$Pointer$.base)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_29)) append_~head.base) (+ append_~head.offset 4)) 0))) (= (select (select (store |old(#memory_$Pointer$.offset)| append_~node~0.base (store (select |old(#memory_$Pointer$.offset)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_32)) append_~head.base) append_~head.offset) 0) (= (select (select (store |old(#memory_$Pointer$.base)| append_~node~0.base (store (select |old(#memory_$Pointer$.base)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_29)) append_~head.base) append_~head.offset) 0))) (not (= append_~node~0.base 0)) (= append_~node~0.offset 0) (<= 0 (+ 128 |append_#in~input|)) (= (select (select |#memory_$Pointer$.offset| append_~head.base) (+ append_~head.offset 4)) |append_#t~mem8.offset|) (< append_~node~0.base |#StackHeapBarrier|) (<= (+ 8 append_~head.offset) (select |#length| append_~head.base)) (= (store |old(#length)| append_~node~0.base 9) |#length|) (= |append_#in~head.offset| 0) (not (= (select |#valid| |append_#t~mem8.base|) 1)) (= append_~head.base |append_#in~head.base|) (= |#NULL.offset| 0) (= (select |#valid| append_~head.base) 1) (= |#valid| (store |old(#valid)| append_~node~0.base 1)) (= append_~input |append_#in~input|) (<= |append_#in~input| 127) (= (select (select |#memory_$Pointer$.base| append_~head.base) (+ append_~head.offset 4)) |append_#t~mem8.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:37:00,693 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:37:00,693 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:37:00,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-11-25 18:37:00,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548902585] [2021-11-25 18:37:00,695 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:37:00,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-25 18:37:00,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:37:00,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-25 18:37:00,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=3591, Unknown=92, NotChecked=0, Total=4032 [2021-11-25 18:37:00,697 INFO L87 Difference]: Start difference. First operand 209 states and 244 transitions. Second operand has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 27 states have internal predecessors, (58), 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) [2021-11-25 18:37:05,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:37:05,642 INFO L93 Difference]: Finished difference Result 227 states and 260 transitions. [2021-11-25 18:37:05,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-25 18:37:05,642 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 27 states have internal predecessors, (58), 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 35 [2021-11-25 18:37:05,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:37:05,643 INFO L225 Difference]: With dead ends: 227 [2021-11-25 18:37:05,644 INFO L226 Difference]: Without dead ends: 227 [2021-11-25 18:37:05,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1665 ImplicationChecksByTransitivity, 105.2s TimeCoverageRelationStatistics Valid=395, Invalid=4203, Unknown=94, NotChecked=0, Total=4692 [2021-11-25 18:37:05,645 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 55 mSDsluCounter, 766 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 267 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:37:05,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 765 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 543 Invalid, 0 Unknown, 267 Unchecked, 0.7s Time] [2021-11-25 18:37:05,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-11-25 18:37:05,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 201. [2021-11-25 18:37:05,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 149 states have (on average 1.4093959731543624) internal successors, (210), 187 states have internal predecessors, (210), 9 states have call successors, (9), 7 states have call predecessors, (9), 9 states have return successors, (14), 6 states have call predecessors, (14), 9 states have call successors, (14) [2021-11-25 18:37:05,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 233 transitions. [2021-11-25 18:37:05,653 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 233 transitions. Word has length 35 [2021-11-25 18:37:05,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:37:05,653 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 233 transitions. [2021-11-25 18:37:05,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 27 states have internal predecessors, (58), 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) [2021-11-25 18:37:05,661 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 233 transitions. [2021-11-25 18:37:05,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-25 18:37:05,662 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:37:05,662 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:37:05,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 18:37:05,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-25 18:37:05,863 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-25 18:37:05,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:37:05,863 INFO L85 PathProgramCache]: Analyzing trace with hash -296542381, now seen corresponding path program 1 times [2021-11-25 18:37:05,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:37:05,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747700327] [2021-11-25 18:37:05,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:37:05,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:37:05,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:37:05,916 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 18:37:05,916 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:37:05,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747700327] [2021-11-25 18:37:05,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747700327] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:37:05,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466148752] [2021-11-25 18:37:05,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:37:05,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:37:05,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:37:05,929 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:37:05,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 18:37:06,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:37:06,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:37:06,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:37:06,147 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 18:37:06,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:37:06,201 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 18:37:06,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466148752] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:37:06,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [818196761] [2021-11-25 18:37:06,203 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2021-11-25 18:37:06,204 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:37:06,204 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:37:06,204 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:37:06,204 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:37:06,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:37:06,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:37:06,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:37:06,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:37:06,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:37:06,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:37:06,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:37:06,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:37:06,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 18:37:06,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 18:37:06,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:37:06,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 18:37:06,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 18:37:06,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:37:06,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:37:06,451 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:37:06,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 40 [2021-11-25 18:37:06,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:37:06,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:37:06,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:37:06,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:37:06,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:37:06,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:37:06,559 INFO L354 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2021-11-25 18:37:06,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:37:06,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:37:06,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:37:06,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:37:06,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:37:06,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,632 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-25 18:37:06,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:37:06,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:37:06,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,671 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-25 18:37:06,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:37:06,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,721 INFO L354 Elim1Store]: treesize reduction 66, result has 29.0 percent of original size [2021-11-25 18:37:06,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:37:06,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,760 INFO L354 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2021-11-25 18:37:06,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:37:06,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:37:06,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 18 [2021-11-25 18:37:06,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:37:06,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:37:06,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:37:06,893 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:37:06,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 40 [2021-11-25 18:37:06,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 18 [2021-11-25 18:37:06,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:37:06,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:06,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:37:07,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:07,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:07,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:07,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:07,438 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:37:07,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 45 [2021-11-25 18:37:07,451 INFO L197 IcfgInterpreter]: Interpreting procedure append with input of size 103 for LOIs [2021-11-25 18:37:08,976 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:37:35,691 WARN L227 SmtUtils]: Spent 5.09s on a formula simplification. DAG size of input: 227 DAG size of output: 111 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:37:55,684 WARN L227 SmtUtils]: Spent 6.71s on a formula simplification. DAG size of input: 236 DAG size of output: 116 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:37:56,216 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7353#(and (<= |ULTIMATE.start_main_~userInput~2#1| 127) (= |ULTIMATE.start_main_~list2~0#1.offset| 0) (<= 0 (+ 128 |ULTIMATE.start_main_~userInput~1#1|)) (<= 0 (+ 128 |ULTIMATE.start_main_~userInput~2#1|)) (<= 5 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~list~0#1.offset| 0) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~userInput~1#1| 127) (< (select |#length| |ULTIMATE.start_main_~list~0#1.base|) (+ |ULTIMATE.start_main_~list~0#1.offset| 4)) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~length~0#1| 5) (= |#NULL.base| 0))' at error location [2021-11-25 18:37:56,217 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:37:56,217 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:37:56,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-25 18:37:56,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888348720] [2021-11-25 18:37:56,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:37:56,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:37:56,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:37:56,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:37:56,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=766, Unknown=13, NotChecked=0, Total=870 [2021-11-25 18:37:56,219 INFO L87 Difference]: Start difference. First operand 201 states and 233 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-25 18:37:56,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:37:56,292 INFO L93 Difference]: Finished difference Result 248 states and 290 transitions. [2021-11-25 18:37:56,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:37:56,293 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 39 [2021-11-25 18:37:56,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:37:56,294 INFO L225 Difference]: With dead ends: 248 [2021-11-25 18:37:56,294 INFO L226 Difference]: Without dead ends: 248 [2021-11-25 18:37:56,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 47.3s TimeCoverageRelationStatistics Valid=91, Invalid=766, Unknown=13, NotChecked=0, Total=870 [2021-11-25 18:37:56,295 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 58 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:37:56,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 285 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:37:56,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-11-25 18:37:56,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 233. [2021-11-25 18:37:56,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 176 states have (on average 1.4318181818181819) internal successors, (252), 213 states have internal predecessors, (252), 14 states have call successors, (14), 7 states have call predecessors, (14), 9 states have return successors, (24), 12 states have call predecessors, (24), 14 states have call successors, (24) [2021-11-25 18:37:56,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 290 transitions. [2021-11-25 18:37:56,306 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 290 transitions. Word has length 39 [2021-11-25 18:37:56,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:37:56,306 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 290 transitions. [2021-11-25 18:37:56,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-25 18:37:56,306 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 290 transitions. [2021-11-25 18:37:56,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-25 18:37:56,307 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:37:56,307 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:37:56,332 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-25 18:37:56,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:37:56,518 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting appendErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-25 18:37:56,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:37:56,518 INFO L85 PathProgramCache]: Analyzing trace with hash 310902026, now seen corresponding path program 1 times [2021-11-25 18:37:56,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:37:56,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626326922] [2021-11-25 18:37:56,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:37:56,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:37:56,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:37:56,634 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:37:56,634 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:37:56,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626326922] [2021-11-25 18:37:56,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626326922] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:37:56,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325105630] [2021-11-25 18:37:56,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:37:56,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:37:56,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:37:56,636 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:37:56,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 18:37:56,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:37:56,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-25 18:37:56,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:37:56,946 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:37:56,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-25 18:37:56,951 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:37:56,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:37:57,136 INFO L354 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2021-11-25 18:37:57,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 30 treesize of output 38 [2021-11-25 18:37:57,188 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:37:57,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325105630] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:37:57,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2056082224] [2021-11-25 18:37:57,190 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2021-11-25 18:37:57,190 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:37:57,191 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:37:57,192 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:37:57,192 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:37:57,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:37:57,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:37:57,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:37:57,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:37:57,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:37:57,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:37:57,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:37:57,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:37:57,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 18:37:57,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 18:37:57,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:37:57,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 18:37:57,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 18:37:57,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:37:57,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:37:57,421 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:37:57,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 40 [2021-11-25 18:37:57,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:37:57,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:37:57,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:37:57,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:37:57,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:37:57,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:37:57,520 INFO L354 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2021-11-25 18:37:57,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:37:57,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:37:57,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:37:57,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:37:57,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:37:57,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:37:57,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,582 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-25 18:37:57,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:37:57,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,605 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-25 18:37:57,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:37:57,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:37:57,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,652 INFO L354 Elim1Store]: treesize reduction 66, result has 29.0 percent of original size [2021-11-25 18:37:57,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:37:57,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,684 INFO L354 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2021-11-25 18:37:57,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:37:57,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2021-11-25 18:37:57,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:37:57,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:37:57,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,812 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:37:57,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 45 [2021-11-25 18:37:57,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2021-11-25 18:37:57,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:37:57,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:57,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:37:58,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:58,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:58,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:58,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:58,405 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:37:58,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 45 [2021-11-25 18:37:58,418 INFO L197 IcfgInterpreter]: Interpreting procedure append with input of size 105 for LOIs [2021-11-25 18:37:59,927 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:38:50,296 WARN L227 SmtUtils]: Spent 6.67s on a formula simplification. DAG size of input: 238 DAG size of output: 117 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:38:50,673 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8113#(and (= 0 (select |old(#valid)| append_~node~0.base)) (= |append_#in~head.offset| append_~head.offset) (<= 0 |#NULL.base|) (= |#memory_$Pointer$.offset| (store |old(#memory_$Pointer$.offset)| append_~node~0.base (store (select |old(#memory_$Pointer$.offset)| append_~node~0.base) append_~node~0.offset (select (select |#memory_$Pointer$.offset| append_~node~0.base) append_~node~0.offset)))) (= |#memory_int| (store |old(#memory_int)| append_~node~0.base (store (select |old(#memory_int)| append_~node~0.base) append_~node~0.offset append_~input))) (not (= append_~node~0.base 0)) (= append_~node~0.offset 0) (<= 0 (+ 128 |append_#in~input|)) (< append_~node~0.base |#StackHeapBarrier|) (<= |#NULL.offset| 0) (<= 0 |append_#in~head.offset|) (<= |append_#in~head.offset| 0) (= (store |old(#length)| append_~node~0.base 9) |#length|) (= append_~head.base |append_#in~head.base|) (<= |#NULL.base| 0) (= |#memory_$Pointer$.base| (store |old(#memory_$Pointer$.base)| append_~node~0.base (store (select |old(#memory_$Pointer$.base)| append_~node~0.base) append_~node~0.offset (select (select |#memory_$Pointer$.base| append_~node~0.base) append_~node~0.offset)))) (= |#valid| (store |old(#valid)| append_~node~0.base 1)) (= append_~input |append_#in~input|) (<= |append_#in~input| 127) (<= 0 |#NULL.offset|) (not (= (select |#valid| append_~head.base) 1)) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-25 18:38:50,673 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:38:50,673 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:38:50,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 9 [2021-11-25 18:38:50,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433308302] [2021-11-25 18:38:50,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:38:50,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 18:38:50,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:38:50,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 18:38:50,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=831, Unknown=15, NotChecked=0, Total=992 [2021-11-25 18:38:50,675 INFO L87 Difference]: Start difference. First operand 233 states and 290 transitions. Second operand has 10 states, 9 states have (on average 6.333333333333333) internal successors, (57), 10 states have internal predecessors, (57), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 18:38:50,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:38:50,824 INFO L93 Difference]: Finished difference Result 254 states and 307 transitions. [2021-11-25 18:38:50,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:38:50,824 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 6.333333333333333) internal successors, (57), 10 states have internal predecessors, (57), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 42 [2021-11-25 18:38:50,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:38:50,826 INFO L225 Difference]: With dead ends: 254 [2021-11-25 18:38:50,826 INFO L226 Difference]: Without dead ends: 254 [2021-11-25 18:38:50,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 50.8s TimeCoverageRelationStatistics Valid=146, Invalid=831, Unknown=15, NotChecked=0, Total=992 [2021-11-25 18:38:50,827 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 171 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:38:50,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 208 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 173 Invalid, 0 Unknown, 104 Unchecked, 0.1s Time] [2021-11-25 18:38:50,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-11-25 18:38:50,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 238. [2021-11-25 18:38:50,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 181 states have (on average 1.4364640883977902) internal successors, (260), 217 states have internal predecessors, (260), 14 states have call successors, (14), 8 states have call predecessors, (14), 9 states have return successors, (24), 12 states have call predecessors, (24), 14 states have call successors, (24) [2021-11-25 18:38:50,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 298 transitions. [2021-11-25 18:38:50,839 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 298 transitions. Word has length 42 [2021-11-25 18:38:50,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:38:50,839 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 298 transitions. [2021-11-25 18:38:50,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 6.333333333333333) internal successors, (57), 10 states have internal predecessors, (57), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 18:38:50,839 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 298 transitions. [2021-11-25 18:38:50,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-25 18:38:50,840 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:38:50,840 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:38:50,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 18:38:51,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:38:51,053 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting appendErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-25 18:38:51,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:38:51,054 INFO L85 PathProgramCache]: Analyzing trace with hash 310902027, now seen corresponding path program 1 times [2021-11-25 18:38:51,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:38:51,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110079714] [2021-11-25 18:38:51,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:38:51,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:38:51,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:38:51,270 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:38:51,270 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:38:51,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110079714] [2021-11-25 18:38:51,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110079714] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:38:51,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744966080] [2021-11-25 18:38:51,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:38:51,270 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:38:51,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:38:51,272 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:38:51,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 18:38:51,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:38:51,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-25 18:38:51,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:38:51,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:51,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 18:38:51,669 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:38:51,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:38:51,682 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:38:51,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:38:51,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:51,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 17 treesize of output 13 [2021-11-25 18:38:51,985 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:38:51,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 29 [2021-11-25 18:38:52,144 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 18:38:52,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 12 [2021-11-25 18:38:52,208 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:38:52,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744966080] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:38:52,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1255314434] [2021-11-25 18:38:52,210 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2021-11-25 18:38:52,210 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:38:52,211 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:38:52,211 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:38:52,211 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:38:52,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:38:52,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:38:52,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:38:52,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:38:52,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:38:52,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:38:52,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:38:52,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:38:52,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 18:38:52,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:38:52,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 18:38:52,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 18:38:52,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:38:52,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 18:38:52,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,415 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:38:52,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 45 [2021-11-25 18:38:52,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:38:52,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:38:52,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:38:52,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:38:52,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:38:52,501 INFO L354 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2021-11-25 18:38:52,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:38:52,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:38:52,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:38:52,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:38:52,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:38:52,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:38:52,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,577 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-25 18:38:52,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:38:52,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,602 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-25 18:38:52,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:38:52,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:38:52,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:38:52,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,659 INFO L354 Elim1Store]: treesize reduction 66, result has 29.0 percent of original size [2021-11-25 18:38:52,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:38:52,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,691 INFO L354 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2021-11-25 18:38:52,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:38:52,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:38:52,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 18 [2021-11-25 18:38:52,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:38:52,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,803 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:38:52,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 45 [2021-11-25 18:38:52,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:38:52,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:38:52,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 18 [2021-11-25 18:38:53,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:53,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:53,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:53,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:53,442 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:38:53,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 45 [2021-11-25 18:38:53,460 INFO L197 IcfgInterpreter]: Interpreting procedure append with input of size 102 for LOIs [2021-11-25 18:38:54,853 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:39:27,096 WARN L227 SmtUtils]: Spent 7.10s on a formula simplification. DAG size of input: 226 DAG size of output: 110 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:39:47,807 WARN L227 SmtUtils]: Spent 7.72s on a formula simplification. DAG size of input: 235 DAG size of output: 115 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:39:48,223 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8895#(and (= 0 (select |old(#valid)| append_~node~0.base)) (= |append_#in~head.offset| append_~head.offset) (= |#memory_$Pointer$.offset| (store |old(#memory_$Pointer$.offset)| append_~node~0.base (store (select |old(#memory_$Pointer$.offset)| append_~node~0.base) append_~node~0.offset (select (select |#memory_$Pointer$.offset| append_~node~0.base) append_~node~0.offset)))) (= |#memory_int| (store |old(#memory_int)| append_~node~0.base (store (select |old(#memory_int)| append_~node~0.base) append_~node~0.offset append_~input))) (not (= append_~node~0.base 0)) (= append_~node~0.offset 0) (<= 0 (+ 128 |append_#in~input|)) (< (select |#length| append_~head.base) (+ append_~head.offset 4)) (< append_~node~0.base |#StackHeapBarrier|) (<= |#NULL.offset| 0) (<= 0 |append_#in~head.offset|) (<= |append_#in~head.offset| 0) (= (store |old(#length)| append_~node~0.base 9) |#length|) (= append_~head.base |append_#in~head.base|) (= |#memory_$Pointer$.base| (store |old(#memory_$Pointer$.base)| append_~node~0.base (store (select |old(#memory_$Pointer$.base)| append_~node~0.base) append_~node~0.offset (select (select |#memory_$Pointer$.base| append_~node~0.base) append_~node~0.offset)))) (= |#valid| (store |old(#valid)| append_~node~0.base 1)) (= append_~input |append_#in~input|) (<= |append_#in~input| 127) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:39:48,223 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:39:48,224 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:39:48,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2021-11-25 18:39:48,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153640836] [2021-11-25 18:39:48,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:39:48,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-25 18:39:48,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:39:48,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-25 18:39:48,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1532, Unknown=14, NotChecked=0, Total=1806 [2021-11-25 18:39:48,226 INFO L87 Difference]: Start difference. First operand 238 states and 298 transitions. Second operand has 21 states, 20 states have (on average 3.65) internal successors, (73), 18 states have internal predecessors, (73), 5 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 18:39:48,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:39:48,736 INFO L93 Difference]: Finished difference Result 274 states and 327 transitions. [2021-11-25 18:39:48,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 18:39:48,736 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.65) internal successors, (73), 18 states have internal predecessors, (73), 5 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2021-11-25 18:39:48,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:39:48,738 INFO L225 Difference]: With dead ends: 274 [2021-11-25 18:39:48,738 INFO L226 Difference]: Without dead ends: 274 [2021-11-25 18:39:48,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 53.8s TimeCoverageRelationStatistics Valid=319, Invalid=1737, Unknown=14, NotChecked=0, Total=2070 [2021-11-25 18:39:48,740 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 344 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 267 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:39:48,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 407 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 525 Invalid, 0 Unknown, 267 Unchecked, 0.4s Time] [2021-11-25 18:39:48,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-11-25 18:39:48,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 252. [2021-11-25 18:39:48,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 196 states have (on average 1.3979591836734695) internal successors, (274), 231 states have internal predecessors, (274), 14 states have call successors, (14), 8 states have call predecessors, (14), 10 states have return successors, (23), 12 states have call predecessors, (23), 14 states have call successors, (23) [2021-11-25 18:39:48,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 311 transitions. [2021-11-25 18:39:48,750 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 311 transitions. Word has length 42 [2021-11-25 18:39:48,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:39:48,751 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 311 transitions. [2021-11-25 18:39:48,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.65) internal successors, (73), 18 states have internal predecessors, (73), 5 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 18:39:48,751 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 311 transitions. [2021-11-25 18:39:48,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-25 18:39:48,752 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:39:48,752 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:39:48,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 18:39:48,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-25 18:39:48,953 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting appendErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-25 18:39:48,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:39:48,953 INFO L85 PathProgramCache]: Analyzing trace with hash -2014822204, now seen corresponding path program 1 times [2021-11-25 18:39:48,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:39:48,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557444404] [2021-11-25 18:39:48,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:39:48,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:39:48,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:39:49,109 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 18:39:49,109 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:39:49,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557444404] [2021-11-25 18:39:49,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557444404] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:39:49,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122554562] [2021-11-25 18:39:49,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:39:49,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:39:49,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:39:49,114 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:39:49,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 18:39:49,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:39:49,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-25 18:39:49,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:39:49,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:39:49,491 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:39:49,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-25 18:39:49,551 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:39:49,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 18:39:49,575 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:39:49,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 18:39:49,587 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 18:39:49,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:39:49,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122554562] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:39:49,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1702119286] [2021-11-25 18:39:49,781 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2021-11-25 18:39:49,782 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:39:49,782 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:39:49,782 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:39:49,782 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:39:49,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:49,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:49,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:39:49,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:39:49,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:39:49,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:49,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:39:49,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:49,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:39:49,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:49,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:39:49,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:49,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:49,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:49,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:49,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:49,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:39:49,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:49,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:39:49,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:49,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:49,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 18:39:49,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:49,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:39:49,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:49,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:49,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 18:39:49,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:49,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:49,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:49,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 18:39:49,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:49,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:39:49,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:49,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:49,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:49,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 18:39:49,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:49,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:49,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:49,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:49,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:49,980 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:39:49,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 40 [2021-11-25 18:39:50,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:39:50,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:39:50,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:39:50,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:39:50,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:39:50,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:39:50,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:39:50,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:39:50,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:50,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:39:50,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:39:50,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:50,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:39:50,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:50,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:50,099 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-25 18:39:50,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:39:50,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:50,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:50,118 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-25 18:39:50,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:39:50,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:39:50,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:39:50,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:50,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:50,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:50,156 INFO L354 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2021-11-25 18:39:50,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:39:50,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:50,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:50,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:50,197 INFO L354 Elim1Store]: treesize reduction 56, result has 39.8 percent of original size [2021-11-25 18:39:50,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:39:50,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:50,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:39:50,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:39:50,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:50,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:39:50,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:39:50,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:50,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:50,261 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-25 18:39:50,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:39:50,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:50,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:50,285 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-25 18:39:50,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:39:50,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:50,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:50,374 INFO L354 Elim1Store]: treesize reduction 110, result has 39.6 percent of original size [2021-11-25 18:39:50,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:39:50,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:50,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:50,429 INFO L354 Elim1Store]: treesize reduction 86, result has 35.8 percent of original size [2021-11-25 18:39:50,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:39:50,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:39:50,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:50,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:50,596 INFO L354 Elim1Store]: treesize reduction 190, result has 31.2 percent of original size [2021-11-25 18:39:50,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 447 treesize of output 446 [2021-11-25 18:39:50,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:50,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:50,701 INFO L354 Elim1Store]: treesize reduction 122, result has 38.4 percent of original size [2021-11-25 18:39:50,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 437 treesize of output 372 [2021-11-25 18:40:11,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:40:12,176 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-25 18:40:12,180 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-25 18:40:12,190 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-25 18:40:12,191 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-25 18:40:12,194 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-25 18:40:12,213 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-25 18:40:12,399 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-25 18:40:12,402 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-25 18:40:12,414 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-25 18:40:12,415 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-25 18:40:12,418 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-25 18:40:12,431 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-25 18:40:12,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:12,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:12,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:12,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:40:12,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:12,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:12,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:12,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:12,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:12,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2021-11-25 18:40:12,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:12,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:12,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:12,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:40:12,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:12,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:12,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:12,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:12,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:12,676 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:40:12,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 40 [2021-11-25 18:40:12,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:12,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:12,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:12,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:12,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:12,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2021-11-25 18:40:12,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:12,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:12,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:12,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:40:12,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:12,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:12,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:12,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:40:12,866 INFO L354 Elim1Store]: treesize reduction 144, result has 20.4 percent of original size [2021-11-25 18:40:12,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 245 treesize of output 261 [2021-11-25 18:40:12,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-11-25 18:40:13,025 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:40:13,149 INFO L354 Elim1Store]: treesize reduction 144, result has 20.4 percent of original size [2021-11-25 18:40:13,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 245 treesize of output 261 [2021-11-25 18:40:13,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-11-25 18:40:13,302 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:40:13,479 INFO L354 Elim1Store]: treesize reduction 144, result has 20.4 percent of original size [2021-11-25 18:40:13,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 245 treesize of output 261 [2021-11-25 18:40:13,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-11-25 18:40:13,632 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:40:13,773 INFO L354 Elim1Store]: treesize reduction 144, result has 20.4 percent of original size [2021-11-25 18:40:13,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 245 treesize of output 261 [2021-11-25 18:40:13,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-11-25 18:40:13,939 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:40:14,006 INFO L354 Elim1Store]: treesize reduction 24, result has 41.5 percent of original size [2021-11-25 18:40:14,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 36 [2021-11-25 18:40:14,109 INFO L354 Elim1Store]: treesize reduction 144, result has 20.4 percent of original size [2021-11-25 18:40:14,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 245 treesize of output 261 [2021-11-25 18:40:14,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-11-25 18:40:14,225 INFO L197 IcfgInterpreter]: Interpreting procedure append with input of size 116 for LOIs [2021-11-25 18:40:15,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:40:15,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:40:15,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:40:15,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:15,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:15,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:40:15,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:15,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:15,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:15,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:15,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:15,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:15,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:15,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:15,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:15,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:15,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:40:15,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:15,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:15,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:15,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:15,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:15,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:15,194 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:40:15,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:15,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:15,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:15,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:15,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:15,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:15,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:15,210 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:40:15,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:15,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:40:15,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:40:15,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:15,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:15,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:15,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:15,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:15,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:15,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:15,269 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:40:15,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:15,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:40:15,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:15,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:15,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:15,289 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:40:15,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:15,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:15,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:15,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:15,367 INFO L354 Elim1Store]: treesize reduction 108, result has 34.9 percent of original size [2021-11-25 18:40:15,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 166 treesize of output 150 [2021-11-25 18:40:15,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:15,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:15,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:15,423 INFO L354 Elim1Store]: treesize reduction 94, result has 39.0 percent of original size [2021-11-25 18:40:15,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 222 treesize of output 208 [2021-11-25 18:40:15,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 1 [2021-11-25 18:40:15,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:15,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:15,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:15,522 INFO L354 Elim1Store]: treesize reduction 150, result has 19.8 percent of original size [2021-11-25 18:40:15,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 309 treesize of output 242 [2021-11-25 18:40:15,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:15,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:15,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:15,583 INFO L354 Elim1Store]: treesize reduction 132, result has 32.3 percent of original size [2021-11-25 18:40:15,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 289 treesize of output 280 [2021-11-25 18:40:15,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:40:16,087 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:40:19,879 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9672#(and (= 0 (select |old(#valid)| append_~node~0.base)) (exists ((|v_ULTIMATE.start_main_~list2~0#1.base_BEFORE_CALL_83| Int)) (and (or (and (not (= |v_ULTIMATE.start_main_~list2~0#1.base_BEFORE_CALL_83| |append_#in~head.base|)) (not (= |v_ULTIMATE.start_main_~list2~0#1.base_BEFORE_CALL_83| 0)) (< |append_#in~head.base| |#StackHeapBarrier|) (< |v_ULTIMATE.start_main_~list2~0#1.base_BEFORE_CALL_83| |#StackHeapBarrier|) (= |append_#in~head.offset| 0) (not (= |append_#in~head.base| 0)) (= |#NULL.offset| 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0)) (and (= (select |old(#valid)| |append_#in~head.base|) 1) (= (select (select |old(#memory_$Pointer$.base)| |append_#in~head.base|) (+ |append_#in~head.offset| 4)) 0) (not (= |v_ULTIMATE.start_main_~list2~0#1.base_BEFORE_CALL_83| |append_#in~head.base|)) (= (select (select |old(#memory_$Pointer$.base)| |v_ULTIMATE.start_main_~list2~0#1.base_BEFORE_CALL_83|) 0) 0) (= 8 (select |old(#length)| |v_ULTIMATE.start_main_~list2~0#1.base_BEFORE_CALL_83|)) (= (select |old(#valid)| 1) 1) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (= (select (select |old(#memory_$Pointer$.base)| |v_ULTIMATE.start_main_~list2~0#1.base_BEFORE_CALL_83|) 4) 0) (not (= |v_ULTIMATE.start_main_~list2~0#1.base_BEFORE_CALL_83| 0)) (< |append_#in~head.base| |#StackHeapBarrier|) (< |v_ULTIMATE.start_main_~list2~0#1.base_BEFORE_CALL_83| |#StackHeapBarrier|) (= |append_#in~head.offset| 0) (= (select (select |old(#memory_int)| 1) 0) 48) (not (= |append_#in~head.base| 0)) (= |#NULL.offset| 0) (= (select |old(#valid)| |v_ULTIMATE.start_main_~list2~0#1.base_BEFORE_CALL_83|) 1) (= (select (select |old(#memory_$Pointer$.base)| |append_#in~head.base|) |append_#in~head.offset|) 0) (= (select (select |old(#memory_$Pointer$.offset)| |append_#in~head.base|) (+ |append_#in~head.offset| 4)) 0) (= (select |old(#length)| 2) 18) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select (select |old(#memory_$Pointer$.offset)| |append_#in~head.base|) |append_#in~head.offset|) 0) (<= (+ |append_#in~head.offset| 8) (select |old(#length)| |append_#in~head.base|)) (= (select |old(#length)| |append_#in~head.base|) 8) (= (select (select |old(#memory_$Pointer$.offset)| |v_ULTIMATE.start_main_~list2~0#1.base_BEFORE_CALL_83|) 0) 0) (= (select |old(#valid)| 2) 1) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= (select (select |old(#memory_$Pointer$.offset)| |v_ULTIMATE.start_main_~list2~0#1.base_BEFORE_CALL_83|) 4) 0))) (not (= |v_ULTIMATE.start_main_~list2~0#1.base_BEFORE_CALL_83| 2)) (not (= |v_ULTIMATE.start_main_~list2~0#1.base_BEFORE_CALL_83| 1)))) (= |append_#in~head.offset| append_~head.offset) (= |#memory_$Pointer$.offset| (store |old(#memory_$Pointer$.offset)| append_~node~0.base (store (select |old(#memory_$Pointer$.offset)| append_~node~0.base) append_~node~0.offset (select (select |#memory_$Pointer$.offset| append_~node~0.base) append_~node~0.offset)))) (= |#memory_int| (store |old(#memory_int)| append_~node~0.base (store (select |old(#memory_int)| append_~node~0.base) append_~node~0.offset append_~input))) (not (= append_~node~0.base 0)) (= append_~node~0.offset 0) (<= 0 (+ 128 |append_#in~input|)) (< append_~node~0.base |#StackHeapBarrier|) (= (store |old(#length)| append_~node~0.base 9) |#length|) (= append_~head.base |append_#in~head.base|) (not (= |append_#in~head.base| 1)) (not (= 2 |append_#in~head.base|)) (= |#memory_$Pointer$.base| (store |old(#memory_$Pointer$.base)| append_~node~0.base (store (select |old(#memory_$Pointer$.base)| append_~node~0.base) append_~node~0.offset (select (select |#memory_$Pointer$.base| append_~node~0.base) append_~node~0.offset)))) (= |#valid| (store |old(#valid)| append_~node~0.base 1)) (= append_~input |append_#in~input|) (<= |append_#in~input| 127) (not (= (select |#valid| append_~head.base) 1)))' at error location [2021-11-25 18:40:19,879 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:40:19,879 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:40:19,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-11-25 18:40:19,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638359640] [2021-11-25 18:40:19,879 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:40:19,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-25 18:40:19,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:40:19,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-25 18:40:19,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1163, Unknown=0, NotChecked=0, Total=1332 [2021-11-25 18:40:19,881 INFO L87 Difference]: Start difference. First operand 252 states and 311 transitions. Second operand has 11 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 1 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 18:40:20,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:40:20,206 INFO L93 Difference]: Finished difference Result 325 states and 405 transitions. [2021-11-25 18:40:20,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 18:40:20,207 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 1 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2021-11-25 18:40:20,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:40:20,209 INFO L225 Difference]: With dead ends: 325 [2021-11-25 18:40:20,209 INFO L226 Difference]: Without dead ends: 325 [2021-11-25 18:40:20,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 86 SyntacticMatches, 8 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=240, Invalid=1566, Unknown=0, NotChecked=0, Total=1806 [2021-11-25 18:40:20,211 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 71 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:40:20,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 396 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 311 Invalid, 0 Unknown, 119 Unchecked, 0.2s Time] [2021-11-25 18:40:20,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-11-25 18:40:20,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 251. [2021-11-25 18:40:20,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 196 states have (on average 1.3877551020408163) internal successors, (272), 230 states have internal predecessors, (272), 14 states have call successors, (14), 8 states have call predecessors, (14), 10 states have return successors, (23), 12 states have call predecessors, (23), 14 states have call successors, (23) [2021-11-25 18:40:20,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 309 transitions. [2021-11-25 18:40:20,225 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 309 transitions. Word has length 44 [2021-11-25 18:40:20,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:40:20,225 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 309 transitions. [2021-11-25 18:40:20,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 1 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 18:40:20,226 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 309 transitions. [2021-11-25 18:40:20,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-25 18:40:20,226 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:40:20,227 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:40:20,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-25 18:40:20,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-25 18:40:20,442 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting appendErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-25 18:40:20,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:40:20,442 INFO L85 PathProgramCache]: Analyzing trace with hash -2014822203, now seen corresponding path program 1 times [2021-11-25 18:40:20,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:40:20,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006749606] [2021-11-25 18:40:20,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:20,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:40:20,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:40:20,689 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:40:20,690 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:40:20,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006749606] [2021-11-25 18:40:20,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006749606] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:40:20,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004461766] [2021-11-25 18:40:20,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:20,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:40:20,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:40:20,691 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:40:20,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 18:40:20,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:40:20,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-25 18:40:20,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:40:20,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:20,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:21,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:21,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 18:40:21,113 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:40:21,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-25 18:40:21,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:21,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 18:40:21,313 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:40:21,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-25 18:40:21,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:21,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 12 treesize of output 14 [2021-11-25 18:40:21,477 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-25 18:40:21,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 18 [2021-11-25 18:40:21,501 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 18:40:21,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:40:21,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004461766] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:40:21,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [885144970] [2021-11-25 18:40:21,911 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2021-11-25 18:40:21,911 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:40:21,911 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:40:21,912 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:40:21,912 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:40:21,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:21,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:21,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:21,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:21,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:21,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:21,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:21,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:21,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:22,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:22,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:22,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:22,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:22,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:22,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:40:22,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:22,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:22,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:22,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:22,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:22,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:22,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:22,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:22,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 18:40:22,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:22,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:22,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 18:40:22,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:22,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:22,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:22,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 18:40:22,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:22,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:22,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:22,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:22,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:22,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 18:40:22,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:22,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:22,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:22,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:22,165 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:40:22,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 45 [2021-11-25 18:40:22,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:22,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:22,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:22,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:22,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:22,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:40:22,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:40:22,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:40:22,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:40:22,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:22,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:22,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:22,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:22,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:40:22,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:22,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:22,290 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-25 18:40:22,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:22,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:22,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:22,311 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-25 18:40:22,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:22,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:22,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:22,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:22,341 INFO L354 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2021-11-25 18:40:22,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:22,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:40:22,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:22,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:22,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:22,386 INFO L354 Elim1Store]: treesize reduction 56, result has 39.8 percent of original size [2021-11-25 18:40:22,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:22,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:40:22,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:22,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:22,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:22,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:22,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:22,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:22,434 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-25 18:40:22,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:22,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:40:22,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:22,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:22,463 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-25 18:40:22,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:22,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:22,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:22,547 INFO L354 Elim1Store]: treesize reduction 110, result has 39.6 percent of original size [2021-11-25 18:40:22,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:22,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:22,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:22,602 INFO L354 Elim1Store]: treesize reduction 86, result has 35.8 percent of original size [2021-11-25 18:40:22,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:22,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:40:22,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:40:22,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:22,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:22,779 INFO L354 Elim1Store]: treesize reduction 178, result has 31.0 percent of original size [2021-11-25 18:40:22,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 484 treesize of output 441 [2021-11-25 18:40:22,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:22,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:22,870 INFO L354 Elim1Store]: treesize reduction 138, result has 34.3 percent of original size [2021-11-25 18:40:22,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 411 treesize of output 380 [2021-11-25 18:40:27,981 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-25 18:40:28,001 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-25 18:40:28,498 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-25 18:40:28,517 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-25 18:40:28,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:28,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:28,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:28,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:40:28,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:28,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:28,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:28,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:40:28,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:28,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:28,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:28,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:28,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:28,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 18 [2021-11-25 18:40:29,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:29,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:29,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:29,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:29,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:29,027 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:40:29,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 40 [2021-11-25 18:40:29,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:29,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:29,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:29,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:29,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:29,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 18 [2021-11-25 18:40:29,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:29,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:29,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:29,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:40:29,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:29,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:29,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:29,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:40:29,223 INFO L354 Elim1Store]: treesize reduction 144, result has 20.4 percent of original size [2021-11-25 18:40:29,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 238 treesize of output 254 [2021-11-25 18:40:29,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-11-25 18:40:29,356 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:40:29,461 INFO L354 Elim1Store]: treesize reduction 144, result has 20.4 percent of original size [2021-11-25 18:40:29,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 238 treesize of output 254 [2021-11-25 18:40:29,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-11-25 18:40:29,584 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:40:29,733 INFO L354 Elim1Store]: treesize reduction 144, result has 20.4 percent of original size [2021-11-25 18:40:29,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 238 treesize of output 254 [2021-11-25 18:40:29,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-11-25 18:40:29,873 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:40:29,974 INFO L354 Elim1Store]: treesize reduction 144, result has 20.4 percent of original size [2021-11-25 18:40:29,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 238 treesize of output 254 [2021-11-25 18:40:30,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-11-25 18:40:30,144 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:40:30,226 INFO L354 Elim1Store]: treesize reduction 24, result has 41.5 percent of original size [2021-11-25 18:40:30,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 36 [2021-11-25 18:40:30,357 INFO L354 Elim1Store]: treesize reduction 144, result has 20.4 percent of original size [2021-11-25 18:40:30,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 238 treesize of output 254 [2021-11-25 18:40:30,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-11-25 18:40:30,489 INFO L197 IcfgInterpreter]: Interpreting procedure append with input of size 114 for LOIs [2021-11-25 18:40:31,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:40:31,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:40:31,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:40:31,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:31,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:31,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:40:31,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:31,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:31,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:31,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:31,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:31,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:31,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:31,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:31,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:31,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:31,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:40:31,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:31,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:31,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:31,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:31,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:31,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:31,408 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:40:31,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:31,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:31,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:31,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:31,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:31,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:31,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:31,424 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:40:31,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:31,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:40:31,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:31,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:31,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:40:31,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:31,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:31,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:40:31,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:31,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:31,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:31,487 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:40:31,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:31,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:31,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:31,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:31,498 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:40:31,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:31,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:31,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:31,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:31,577 INFO L354 Elim1Store]: treesize reduction 108, result has 34.9 percent of original size [2021-11-25 18:40:31,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 166 treesize of output 150 [2021-11-25 18:40:31,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:31,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:31,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:31,630 INFO L354 Elim1Store]: treesize reduction 94, result has 39.0 percent of original size [2021-11-25 18:40:31,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 222 treesize of output 208 [2021-11-25 18:40:31,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 1 [2021-11-25 18:40:31,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:31,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:31,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:31,726 INFO L354 Elim1Store]: treesize reduction 150, result has 19.8 percent of original size [2021-11-25 18:40:31,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 309 treesize of output 242 [2021-11-25 18:40:31,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:31,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:31,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:31,783 INFO L354 Elim1Store]: treesize reduction 132, result has 32.3 percent of original size [2021-11-25 18:40:31,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 289 treesize of output 280 [2021-11-25 18:40:32,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:40:32,146 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:40:36,017 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10463#(and (= 0 (select |old(#valid)| append_~node~0.base)) (= |append_#in~head.offset| append_~head.offset) (= |#memory_$Pointer$.offset| (store |old(#memory_$Pointer$.offset)| append_~node~0.base (store (select |old(#memory_$Pointer$.offset)| append_~node~0.base) append_~node~0.offset (select (select |#memory_$Pointer$.offset| append_~node~0.base) append_~node~0.offset)))) (= |#memory_int| (store |old(#memory_int)| append_~node~0.base (store (select |old(#memory_int)| append_~node~0.base) append_~node~0.offset append_~input))) (not (= append_~node~0.base 0)) (= append_~node~0.offset 0) (<= 0 (+ 128 |append_#in~input|)) (< (select |#length| append_~head.base) (+ append_~head.offset 4)) (< append_~node~0.base |#StackHeapBarrier|) (= (store |old(#length)| append_~node~0.base 9) |#length|) (exists ((|v_ULTIMATE.start_main_~list2~0#1.base_BEFORE_CALL_94| Int)) (and (not (= |v_ULTIMATE.start_main_~list2~0#1.base_BEFORE_CALL_94| 2)) (or (and (not (= |v_ULTIMATE.start_main_~list2~0#1.base_BEFORE_CALL_94| 0)) (< |append_#in~head.base| |#StackHeapBarrier|) (= |append_#in~head.offset| 0) (not (= |append_#in~head.base| 0)) (= |#NULL.offset| 0) (not (= |v_ULTIMATE.start_main_~list2~0#1.base_BEFORE_CALL_94| |append_#in~head.base|)) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (< |v_ULTIMATE.start_main_~list2~0#1.base_BEFORE_CALL_94| |#StackHeapBarrier|)) (and (= (select |old(#valid)| |append_#in~head.base|) 1) (= (select (select |old(#memory_$Pointer$.base)| |append_#in~head.base|) (+ |append_#in~head.offset| 4)) 0) (= (select |old(#valid)| |v_ULTIMATE.start_main_~list2~0#1.base_BEFORE_CALL_94|) 1) (= (select |old(#valid)| 1) 1) (= (select |old(#length)| 1) 2) (not (= |v_ULTIMATE.start_main_~list2~0#1.base_BEFORE_CALL_94| 0)) (= (select |old(#valid)| 0) 0) (= (select (select |old(#memory_$Pointer$.base)| |v_ULTIMATE.start_main_~list2~0#1.base_BEFORE_CALL_94|) 4) 0) (= 8 (select |old(#length)| |v_ULTIMATE.start_main_~list2~0#1.base_BEFORE_CALL_94|)) (< |append_#in~head.base| |#StackHeapBarrier|) (= |append_#in~head.offset| 0) (= (select (select |old(#memory_$Pointer$.offset)| |v_ULTIMATE.start_main_~list2~0#1.base_BEFORE_CALL_94|) 4) 0) (= (select (select |old(#memory_int)| 1) 0) 48) (= (select (select |old(#memory_$Pointer$.offset)| |v_ULTIMATE.start_main_~list2~0#1.base_BEFORE_CALL_94|) 0) 0) (not (= |append_#in~head.base| 0)) (= (select (select |old(#memory_$Pointer$.base)| |v_ULTIMATE.start_main_~list2~0#1.base_BEFORE_CALL_94|) 0) 0) (= |#NULL.offset| 0) (= (select (select |old(#memory_$Pointer$.base)| |append_#in~head.base|) |append_#in~head.offset|) 0) (= (select (select |old(#memory_$Pointer$.offset)| |append_#in~head.base|) (+ |append_#in~head.offset| 4)) 0) (= (select |old(#length)| 2) 18) (= (select (select |old(#memory_int)| 1) 1) 0) (not (= |v_ULTIMATE.start_main_~list2~0#1.base_BEFORE_CALL_94| |append_#in~head.base|)) (= (select (select |old(#memory_$Pointer$.offset)| |append_#in~head.base|) |append_#in~head.offset|) 0) (= (select |old(#length)| |append_#in~head.base|) 8) (= (select |old(#valid)| 2) 1) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (< |v_ULTIMATE.start_main_~list2~0#1.base_BEFORE_CALL_94| |#StackHeapBarrier|))) (not (= |v_ULTIMATE.start_main_~list2~0#1.base_BEFORE_CALL_94| 1)))) (= append_~head.base |append_#in~head.base|) (not (= |append_#in~head.base| 1)) (not (= 2 |append_#in~head.base|)) (= |#memory_$Pointer$.base| (store |old(#memory_$Pointer$.base)| append_~node~0.base (store (select |old(#memory_$Pointer$.base)| append_~node~0.base) append_~node~0.offset (select (select |#memory_$Pointer$.base| append_~node~0.base) append_~node~0.offset)))) (= |#valid| (store |old(#valid)| append_~node~0.base 1)) (= append_~input |append_#in~input|) (<= |append_#in~input| 127))' at error location [2021-11-25 18:40:36,017 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:40:36,018 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:40:36,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-11-25 18:40:36,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128344446] [2021-11-25 18:40:36,018 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:40:36,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-25 18:40:36,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:40:36,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-25 18:40:36,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1765, Unknown=0, NotChecked=0, Total=1980 [2021-11-25 18:40:36,020 INFO L87 Difference]: Start difference. First operand 251 states and 309 transitions. Second operand has 17 states, 16 states have (on average 4.5625) internal successors, (73), 14 states have internal predecessors, (73), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-25 18:40:36,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:40:36,625 INFO L93 Difference]: Finished difference Result 405 states and 528 transitions. [2021-11-25 18:40:36,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-25 18:40:36,634 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 4.5625) internal successors, (73), 14 states have internal predecessors, (73), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 44 [2021-11-25 18:40:36,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:40:36,637 INFO L225 Difference]: With dead ends: 405 [2021-11-25 18:40:36,637 INFO L226 Difference]: Without dead ends: 405 [2021-11-25 18:40:36,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=279, Invalid=2271, Unknown=0, NotChecked=0, Total=2550 [2021-11-25 18:40:36,639 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 101 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 273 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:40:36,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 587 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 562 Invalid, 0 Unknown, 273 Unchecked, 0.4s Time] [2021-11-25 18:40:36,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-11-25 18:40:36,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 305. [2021-11-25 18:40:36,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 241 states have (on average 1.3900414937759336) internal successors, (335), 274 states have internal predecessors, (335), 22 states have call successors, (22), 10 states have call predecessors, (22), 11 states have return successors, (41), 20 states have call predecessors, (41), 22 states have call successors, (41) [2021-11-25 18:40:36,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 398 transitions. [2021-11-25 18:40:36,656 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 398 transitions. Word has length 44 [2021-11-25 18:40:36,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:40:36,656 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 398 transitions. [2021-11-25 18:40:36,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 4.5625) internal successors, (73), 14 states have internal predecessors, (73), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-25 18:40:36,657 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 398 transitions. [2021-11-25 18:40:36,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-25 18:40:36,657 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:40:36,658 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:40:36,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-25 18:40:36,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-25 18:40:36,873 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting appendErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-25 18:40:36,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:40:36,874 INFO L85 PathProgramCache]: Analyzing trace with hash 786170591, now seen corresponding path program 1 times [2021-11-25 18:40:36,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:40:36,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613864983] [2021-11-25 18:40:36,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:36,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:40:36,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:40:37,145 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:40:37,145 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:40:37,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613864983] [2021-11-25 18:40:37,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613864983] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:40:37,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475824266] [2021-11-25 18:40:37,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:37,146 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:40:37,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:40:37,153 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:40:37,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-25 18:40:37,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:40:37,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-25 18:40:37,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:40:37,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:37,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:37,567 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:40:37,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-25 18:40:37,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 18:40:37,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:37,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 18:40:37,711 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:40:37,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:37,776 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:40:37,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-11-25 18:40:37,850 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 18:40:37,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:40:38,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475824266] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:40:38,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1805194982] [2021-11-25 18:40:38,095 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2021-11-25 18:40:38,095 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:40:38,095 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:40:38,095 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:40:38,095 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:40:38,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:38,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:38,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:38,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:38,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:38,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:38,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:38,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:38,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:38,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:38,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:38,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:38,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:40:38,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:38,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:38,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:38,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:38,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:38,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:38,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:38,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:38,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:38,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:38,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 18:40:38,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:38,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:38,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 18:40:38,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:38,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:38,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:38,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 18:40:38,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:38,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:38,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:38,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 18:40:38,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:38,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:38,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:38,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:38,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:38,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:38,292 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:40:38,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 45 [2021-11-25 18:40:38,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:38,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:38,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:38,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:38,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:38,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:40:38,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:40:38,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:40:38,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:40:38,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:38,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:38,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:38,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:38,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:38,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:38,399 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-25 18:40:38,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:38,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:40:38,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:38,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:38,425 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-25 18:40:38,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:38,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:40:38,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:38,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:38,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:38,459 INFO L354 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2021-11-25 18:40:38,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:38,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:38,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:38,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:38,503 INFO L354 Elim1Store]: treesize reduction 56, result has 39.8 percent of original size [2021-11-25 18:40:38,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:38,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:40:38,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:38,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:38,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:38,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:38,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:40:38,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:38,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:38,574 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-25 18:40:38,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:38,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:38,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:38,598 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-25 18:40:38,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:38,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:38,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:38,700 INFO L354 Elim1Store]: treesize reduction 110, result has 39.6 percent of original size [2021-11-25 18:40:38,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:38,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:38,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:38,755 INFO L354 Elim1Store]: treesize reduction 86, result has 35.8 percent of original size [2021-11-25 18:40:38,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:40:38,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:40:38,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:40:38,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:38,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:38,940 INFO L354 Elim1Store]: treesize reduction 206, result has 36.0 percent of original size [2021-11-25 18:40:38,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 475 treesize of output 484 [2021-11-25 18:40:38,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:38,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:39,029 INFO L354 Elim1Store]: treesize reduction 142, result has 32.4 percent of original size [2021-11-25 18:40:39,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 505 treesize of output 420 [2021-11-25 18:40:57,736 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-25 18:40:57,746 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-25 18:40:58,197 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-25 18:40:58,207 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-25 18:40:58,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:58,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:58,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:58,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:58,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:58,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2021-11-25 18:40:58,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:58,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:58,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:58,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:40:58,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:58,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:58,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:58,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:40:58,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:58,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:58,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:58,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:58,666 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:40:58,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 45 [2021-11-25 18:40:58,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:58,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:58,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:58,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:58,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:58,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2021-11-25 18:40:58,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:58,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:58,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:58,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:40:58,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:58,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:58,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:58,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:40:58,890 INFO L354 Elim1Store]: treesize reduction 144, result has 20.4 percent of original size [2021-11-25 18:40:58,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 245 treesize of output 261 [2021-11-25 18:40:58,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-11-25 18:40:59,022 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:40:59,137 INFO L354 Elim1Store]: treesize reduction 144, result has 20.4 percent of original size [2021-11-25 18:40:59,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 245 treesize of output 261 [2021-11-25 18:40:59,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-11-25 18:40:59,281 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:40:59,424 INFO L354 Elim1Store]: treesize reduction 144, result has 20.4 percent of original size [2021-11-25 18:40:59,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 245 treesize of output 261 [2021-11-25 18:40:59,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-11-25 18:40:59,561 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:40:59,673 INFO L354 Elim1Store]: treesize reduction 144, result has 20.4 percent of original size [2021-11-25 18:40:59,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 245 treesize of output 261 [2021-11-25 18:40:59,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-11-25 18:40:59,803 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:40:59,874 INFO L354 Elim1Store]: treesize reduction 24, result has 41.5 percent of original size [2021-11-25 18:40:59,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 36 [2021-11-25 18:40:59,989 INFO L354 Elim1Store]: treesize reduction 144, result has 20.4 percent of original size [2021-11-25 18:40:59,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 245 treesize of output 261 [2021-11-25 18:41:00,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-11-25 18:41:00,098 INFO L197 IcfgInterpreter]: Interpreting procedure append with input of size 116 for LOIs [2021-11-25 18:41:00,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:41:00,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:41:00,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:41:00,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:00,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:00,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:41:00,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:00,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:01,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:01,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:01,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:01,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:01,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:01,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:01,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:01,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:01,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:41:01,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:01,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:01,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:01,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:01,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:01,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:01,051 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:41:01,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:01,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:01,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:01,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:01,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:01,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:01,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:01,065 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:41:01,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:01,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:41:01,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:41:01,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:01,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:01,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:01,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:01,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:41:01,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:01,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:01,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:01,129 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:41:01,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:01,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:01,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:01,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:01,142 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:41:01,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:01,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:01,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:01,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:01,218 INFO L354 Elim1Store]: treesize reduction 108, result has 34.9 percent of original size [2021-11-25 18:41:01,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 166 treesize of output 150 [2021-11-25 18:41:01,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:01,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:01,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:01,273 INFO L354 Elim1Store]: treesize reduction 94, result has 39.0 percent of original size [2021-11-25 18:41:01,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 222 treesize of output 208 [2021-11-25 18:41:01,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 1 [2021-11-25 18:41:01,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:41:01,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:01,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:01,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:01,372 INFO L354 Elim1Store]: treesize reduction 150, result has 19.8 percent of original size [2021-11-25 18:41:01,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 309 treesize of output 242 [2021-11-25 18:41:01,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:01,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:01,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:01,431 INFO L354 Elim1Store]: treesize reduction 132, result has 32.3 percent of original size [2021-11-25 18:41:01,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 289 treesize of output 280 [2021-11-25 18:41:01,648 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:41:05,769 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11405#(and (= 0 (select |old(#valid)| append_~node~0.base)) (= |append_#in~head.offset| append_~head.offset) (= |#memory_$Pointer$.offset| (store |old(#memory_$Pointer$.offset)| append_~node~0.base (store (select |old(#memory_$Pointer$.offset)| append_~node~0.base) append_~node~0.offset (select (select |#memory_$Pointer$.offset| append_~node~0.base) append_~node~0.offset)))) (= |#memory_int| (store |old(#memory_int)| append_~node~0.base (store (select |old(#memory_int)| append_~node~0.base) append_~node~0.offset append_~input))) (not (= append_~node~0.base 0)) (<= (+ append_~head.offset 4) (select |#length| append_~head.base)) (= append_~node~0.offset 0) (<= 0 (+ 128 |append_#in~input|)) (< append_~node~0.base |#StackHeapBarrier|) (< (select |#length| append_~head.base) (+ 8 append_~head.offset)) (= (store |old(#length)| append_~node~0.base 9) |#length|) |append_#t~short6| (= append_~head.base |append_#in~head.base|) (not (= |append_#in~head.base| 1)) (not (= 2 |append_#in~head.base|)) (= |#memory_$Pointer$.base| (store |old(#memory_$Pointer$.base)| append_~node~0.base (store (select |old(#memory_$Pointer$.base)| append_~node~0.base) append_~node~0.offset (select (select |#memory_$Pointer$.base| append_~node~0.base) append_~node~0.offset)))) (= |append_#t~mem4.offset| (select (select |#memory_$Pointer$.offset| append_~head.base) append_~head.offset)) (exists ((|v_ULTIMATE.start_main_~list2~0#1.base_BEFORE_CALL_105| Int)) (and (not (= |v_ULTIMATE.start_main_~list2~0#1.base_BEFORE_CALL_105| 1)) (not (= |v_ULTIMATE.start_main_~list2~0#1.base_BEFORE_CALL_105| 2)) (or (and (= (select |old(#valid)| |append_#in~head.base|) 1) (= (select (select |old(#memory_$Pointer$.base)| |append_#in~head.base|) (+ |append_#in~head.offset| 4)) 0) (< |v_ULTIMATE.start_main_~list2~0#1.base_BEFORE_CALL_105| |#StackHeapBarrier|) (= (select |old(#valid)| 1) 1) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (= (select |old(#valid)| |v_ULTIMATE.start_main_~list2~0#1.base_BEFORE_CALL_105|) 1) (= (select |old(#length)| |v_ULTIMATE.start_main_~list2~0#1.base_BEFORE_CALL_105|) 8) (= (select (select |old(#memory_$Pointer$.offset)| |v_ULTIMATE.start_main_~list2~0#1.base_BEFORE_CALL_105|) 4) 0) (= (select (select |old(#memory_$Pointer$.base)| |v_ULTIMATE.start_main_~list2~0#1.base_BEFORE_CALL_105|) 4) 0) (= (select (select |old(#memory_$Pointer$.base)| |v_ULTIMATE.start_main_~list2~0#1.base_BEFORE_CALL_105|) 0) 0) (< |append_#in~head.base| |#StackHeapBarrier|) (= |append_#in~head.offset| 0) (= (select (select |old(#memory_int)| 1) 0) 48) (not (= |v_ULTIMATE.start_main_~list2~0#1.base_BEFORE_CALL_105| 0)) (not (= |append_#in~head.base| 0)) (not (= |v_ULTIMATE.start_main_~list2~0#1.base_BEFORE_CALL_105| |append_#in~head.base|)) (= |#NULL.offset| 0) (= (select (select |old(#memory_$Pointer$.base)| |append_#in~head.base|) |append_#in~head.offset|) 0) (= (select (select |old(#memory_$Pointer$.offset)| |append_#in~head.base|) (+ |append_#in~head.offset| 4)) 0) (= (select |old(#length)| 2) 18) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select (select |old(#memory_$Pointer$.offset)| |append_#in~head.base|) |append_#in~head.offset|) 0) (<= (+ |append_#in~head.offset| 8) (select |old(#length)| |append_#in~head.base|)) (= (select |old(#length)| |append_#in~head.base|) 8) (= (select |old(#valid)| 2) 1) (= (select (select |old(#memory_$Pointer$.offset)| |v_ULTIMATE.start_main_~list2~0#1.base_BEFORE_CALL_105|) 0) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0)) (and (< |v_ULTIMATE.start_main_~list2~0#1.base_BEFORE_CALL_105| |#StackHeapBarrier|) (< |append_#in~head.base| |#StackHeapBarrier|) (= |append_#in~head.offset| 0) (not (= |v_ULTIMATE.start_main_~list2~0#1.base_BEFORE_CALL_105| 0)) (not (= |append_#in~head.base| 0)) (not (= |v_ULTIMATE.start_main_~list2~0#1.base_BEFORE_CALL_105| |append_#in~head.base|)) (= |#NULL.offset| 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))))) (= (select |#valid| append_~head.base) 1) (= |append_#t~mem4.base| 0) (= |#valid| (store |old(#valid)| append_~node~0.base 1)) (= append_~input |append_#in~input|) (<= |append_#in~input| 127) (= |append_#t~mem4.base| (select (select |#memory_$Pointer$.base| append_~head.base) append_~head.offset)) (= |append_#t~mem4.offset| 0))' at error location [2021-11-25 18:41:05,770 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:41:05,770 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:41:05,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-11-25 18:41:05,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079122678] [2021-11-25 18:41:05,770 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:41:05,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-25 18:41:05,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:41:05,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-25 18:41:05,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=2013, Unknown=0, NotChecked=0, Total=2256 [2021-11-25 18:41:05,776 INFO L87 Difference]: Start difference. First operand 305 states and 398 transitions. Second operand has 19 states, 18 states have (on average 4.388888888888889) internal successors, (79), 16 states have internal predecessors, (79), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-25 18:41:10,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:41:10,203 INFO L93 Difference]: Finished difference Result 324 states and 418 transitions. [2021-11-25 18:41:10,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 18:41:10,203 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 4.388888888888889) internal successors, (79), 16 states have internal predecessors, (79), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 46 [2021-11-25 18:41:10,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:41:10,206 INFO L225 Difference]: With dead ends: 324 [2021-11-25 18:41:10,206 INFO L226 Difference]: Without dead ends: 324 [2021-11-25 18:41:10,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 66 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1062 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=280, Invalid=2270, Unknown=0, NotChecked=0, Total=2550 [2021-11-25 18:41:10,208 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 184 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:41:10,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 280 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 335 Invalid, 0 Unknown, 72 Unchecked, 0.2s Time] [2021-11-25 18:41:10,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-11-25 18:41:10,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 283. [2021-11-25 18:41:10,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 224 states have (on average 1.3526785714285714) internal successors, (303), 256 states have internal predecessors, (303), 19 states have call successors, (19), 10 states have call predecessors, (19), 11 states have return successors, (35), 16 states have call predecessors, (35), 19 states have call successors, (35) [2021-11-25 18:41:10,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 357 transitions. [2021-11-25 18:41:10,222 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 357 transitions. Word has length 46 [2021-11-25 18:41:10,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:41:10,223 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 357 transitions. [2021-11-25 18:41:10,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 4.388888888888889) internal successors, (79), 16 states have internal predecessors, (79), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-25 18:41:10,223 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 357 transitions. [2021-11-25 18:41:10,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-25 18:41:10,224 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:41:10,224 INFO L514 BasicCegarLoop]: 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, 1, 1] [2021-11-25 18:41:10,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-25 18:41:10,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-25 18:41:10,449 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting appendErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-25 18:41:10,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:41:10,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1398508908, now seen corresponding path program 1 times [2021-11-25 18:41:10,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:41:10,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124369126] [2021-11-25 18:41:10,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:41:10,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:41:10,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:41:10,736 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:41:10,736 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:41:10,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124369126] [2021-11-25 18:41:10,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124369126] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:41:10,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420903938] [2021-11-25 18:41:10,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:41:10,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:41:10,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:41:10,737 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:41:10,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-25 18:41:10,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:41:10,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-25 18:41:10,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:41:11,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:11,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:11,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:11,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 18:41:11,225 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:41:11,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-25 18:41:11,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:11,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 18:41:11,360 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:41:11,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:11,423 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:41:11,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-11-25 18:41:11,502 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 18:41:11,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:41:11,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420903938] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:41:11,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1052496032] [2021-11-25 18:41:11,754 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2021-11-25 18:41:11,754 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:41:11,756 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:41:11,756 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:41:11,756 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:41:11,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:11,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:11,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:11,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:11,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:11,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:11,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:11,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:11,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:11,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:11,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:11,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:11,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:11,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:11,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:11,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:11,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:11,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:11,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:41:11,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:11,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:11,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:11,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:11,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 18:41:11,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:11,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:11,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 18:41:11,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:11,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:11,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:11,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:11,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:11,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 18:41:11,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:11,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:11,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:11,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 18:41:11,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:11,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:11,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:11,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:11,980 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:41:11,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 45 [2021-11-25 18:41:12,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:12,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:12,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:12,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:12,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:12,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:41:12,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:41:12,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:41:12,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:12,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:12,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:41:12,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:41:12,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,092 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-25 18:41:12,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:12,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,135 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-25 18:41:12,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:12,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:41:12,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,174 INFO L354 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2021-11-25 18:41:12,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:12,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,217 INFO L354 Elim1Store]: treesize reduction 56, result has 39.8 percent of original size [2021-11-25 18:41:12,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:12,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:12,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:12,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:41:12,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:41:12,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,271 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-25 18:41:12,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:12,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,295 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-25 18:41:12,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:12,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,382 INFO L354 Elim1Store]: treesize reduction 110, result has 39.6 percent of original size [2021-11-25 18:41:12,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:12,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,439 INFO L354 Elim1Store]: treesize reduction 86, result has 35.8 percent of original size [2021-11-25 18:41:12,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:12,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:41:12,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,616 INFO L354 Elim1Store]: treesize reduction 184, result has 28.7 percent of original size [2021-11-25 18:41:12,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 484 treesize of output 435 [2021-11-25 18:41:12,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:12,719 INFO L354 Elim1Store]: treesize reduction 132, result has 37.1 percent of original size [2021-11-25 18:41:12,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 403 treesize of output 378 [2021-11-25 18:41:36,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:41:37,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:37,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:37,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:37,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:41:37,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:37,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:37,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:37,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:37,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:37,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 18 [2021-11-25 18:41:37,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:37,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:37,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:37,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:41:37,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:37,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:37,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:37,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:37,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:37,717 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:41:37,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 40 [2021-11-25 18:41:37,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:37,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:37,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:37,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:41:37,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:37,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:37,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:37,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:37,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:37,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 18 [2021-11-25 18:41:37,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:37,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:37,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:37,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:41:37,891 INFO L354 Elim1Store]: treesize reduction 144, result has 20.4 percent of original size [2021-11-25 18:41:37,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 238 treesize of output 254 [2021-11-25 18:41:37,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-11-25 18:41:38,019 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:41:38,128 INFO L354 Elim1Store]: treesize reduction 144, result has 20.4 percent of original size [2021-11-25 18:41:38,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 238 treesize of output 254 [2021-11-25 18:41:38,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-11-25 18:41:38,253 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:41:38,382 INFO L354 Elim1Store]: treesize reduction 144, result has 20.4 percent of original size [2021-11-25 18:41:38,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 238 treesize of output 254 [2021-11-25 18:41:38,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-11-25 18:41:38,524 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:41:38,633 INFO L354 Elim1Store]: treesize reduction 144, result has 20.4 percent of original size [2021-11-25 18:41:38,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 238 treesize of output 254 [2021-11-25 18:41:38,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-11-25 18:41:38,751 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:41:38,818 INFO L354 Elim1Store]: treesize reduction 24, result has 41.5 percent of original size [2021-11-25 18:41:38,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 36 [2021-11-25 18:41:38,922 INFO L354 Elim1Store]: treesize reduction 144, result has 20.4 percent of original size [2021-11-25 18:41:38,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 238 treesize of output 254 [2021-11-25 18:41:38,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-11-25 18:41:39,024 INFO L197 IcfgInterpreter]: Interpreting procedure append with input of size 114 for LOIs [2021-11-25 18:41:39,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:41:39,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:41:39,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:41:39,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:39,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:39,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:39,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:39,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:41:39,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:39,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:39,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:39,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:39,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:41:39,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:39,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:39,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:39,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:39,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:39,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:39,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:39,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:39,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:39,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:39,881 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:41:39,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:39,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:41:39,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:39,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:39,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:39,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:39,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:39,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:39,901 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:41:39,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:39,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:41:39,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:39,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:39,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:39,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:39,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:41:39,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:39,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:39,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:39,955 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:41:39,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:39,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:39,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:39,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:39,968 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:41:39,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:39,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:39,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:39,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:40,049 INFO L354 Elim1Store]: treesize reduction 108, result has 34.9 percent of original size [2021-11-25 18:41:40,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 166 treesize of output 150 [2021-11-25 18:41:40,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:40,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:40,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:40,106 INFO L354 Elim1Store]: treesize reduction 94, result has 39.0 percent of original size [2021-11-25 18:41:40,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 222 treesize of output 208 [2021-11-25 18:41:40,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 1 [2021-11-25 18:41:40,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:40,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:40,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:40,194 INFO L354 Elim1Store]: treesize reduction 124, result has 22.5 percent of original size [2021-11-25 18:41:40,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 324 treesize of output 253 [2021-11-25 18:41:40,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:40,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:40,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:40,237 INFO L354 Elim1Store]: treesize reduction 110, result has 23.6 percent of original size [2021-11-25 18:41:40,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 354 treesize of output 319 [2021-11-25 18:41:40,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:41:40,298 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:41:44,063 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12242#(and (<= 0 |#NULL.base|) (<= 0 (+ append_~input 128)) (= append_~node~0.offset 0) (<= 0 (+ 128 |append_#in~input|)) (< (select |#length| append_~head.base) (+ 8 append_~head.offset)) (<= append_~head.offset 0) (<= |#NULL.offset| 0) (<= 0 |append_#in~head.offset|) (<= |append_#in~head.offset| 0) (<= 0 append_~head.offset) (<= |#NULL.base| 0) (<= append_~input 127) (<= |append_#in~input| 127) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-25 18:41:44,063 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:41:44,063 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:41:44,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-11-25 18:41:44,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300623203] [2021-11-25 18:41:44,063 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:41:44,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-25 18:41:44,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:41:44,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-25 18:41:44,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=2022, Unknown=0, NotChecked=0, Total=2256 [2021-11-25 18:41:44,065 INFO L87 Difference]: Start difference. First operand 283 states and 357 transitions. Second operand has 19 states, 18 states have (on average 4.5) internal successors, (81), 16 states have internal predecessors, (81), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-25 18:41:48,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:41:48,590 INFO L93 Difference]: Finished difference Result 300 states and 369 transitions. [2021-11-25 18:41:48,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 18:41:48,591 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 4.5) internal successors, (81), 16 states have internal predecessors, (81), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 47 [2021-11-25 18:41:48,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:41:48,593 INFO L225 Difference]: With dead ends: 300 [2021-11-25 18:41:48,593 INFO L226 Difference]: Without dead ends: 300 [2021-11-25 18:41:48,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=272, Invalid=2278, Unknown=0, NotChecked=0, Total=2550 [2021-11-25 18:41:48,594 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 147 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:41:48,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 307 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 455 Invalid, 0 Unknown, 167 Unchecked, 0.4s Time] [2021-11-25 18:41:48,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-11-25 18:41:48,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 285. [2021-11-25 18:41:48,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 226 states have (on average 1.3495575221238938) internal successors, (305), 258 states have internal predecessors, (305), 19 states have call successors, (19), 10 states have call predecessors, (19), 11 states have return successors, (35), 16 states have call predecessors, (35), 19 states have call successors, (35) [2021-11-25 18:41:48,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 359 transitions. [2021-11-25 18:41:48,618 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 359 transitions. Word has length 47 [2021-11-25 18:41:48,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:41:48,620 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 359 transitions. [2021-11-25 18:41:48,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 4.5) internal successors, (81), 16 states have internal predecessors, (81), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-25 18:41:48,621 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 359 transitions. [2021-11-25 18:41:48,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-25 18:41:48,622 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:41:48,622 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:41:48,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-25 18:41:48,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-25 18:41:48,860 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting appendErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-25 18:41:48,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:41:48,860 INFO L85 PathProgramCache]: Analyzing trace with hash -404243426, now seen corresponding path program 2 times [2021-11-25 18:41:48,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:41:48,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005382818] [2021-11-25 18:41:48,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:41:48,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:41:48,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:41:48,948 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 18:41:48,948 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:41:48,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005382818] [2021-11-25 18:41:48,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005382818] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:41:48,949 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:41:48,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:41:48,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734702936] [2021-11-25 18:41:48,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:41:48,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:41:48,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:41:48,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:41:48,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:41:48,951 INFO L87 Difference]: Start difference. First operand 285 states and 359 transitions. Second operand has 6 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:41:49,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:41:49,071 INFO L93 Difference]: Finished difference Result 284 states and 352 transitions. [2021-11-25 18:41:49,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:41:49,072 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2021-11-25 18:41:49,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:41:49,073 INFO L225 Difference]: With dead ends: 284 [2021-11-25 18:41:49,074 INFO L226 Difference]: Without dead ends: 284 [2021-11-25 18:41:49,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:41:49,074 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 99 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:41:49,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 212 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:41:49,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-11-25 18:41:49,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 279. [2021-11-25 18:41:49,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 224 states have (on average 1.3169642857142858) internal successors, (295), 252 states have internal predecessors, (295), 19 states have call successors, (19), 10 states have call predecessors, (19), 11 states have return successors, (35), 16 states have call predecessors, (35), 19 states have call successors, (35) [2021-11-25 18:41:49,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 349 transitions. [2021-11-25 18:41:49,090 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 349 transitions. Word has length 48 [2021-11-25 18:41:49,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:41:49,091 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 349 transitions. [2021-11-25 18:41:49,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:41:49,091 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 349 transitions. [2021-11-25 18:41:49,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-25 18:41:49,092 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:41:49,092 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:41:49,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-25 18:41:49,092 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting appendErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-25 18:41:49,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:41:49,093 INFO L85 PathProgramCache]: Analyzing trace with hash -494615208, now seen corresponding path program 1 times [2021-11-25 18:41:49,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:41:49,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371053988] [2021-11-25 18:41:49,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:41:49,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:41:49,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:41:49,632 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:41:49,632 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:41:49,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371053988] [2021-11-25 18:41:49,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371053988] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:41:49,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156856700] [2021-11-25 18:41:49,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:41:49,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:41:49,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:41:49,634 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:41:49,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-25 18:41:49,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:41:49,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-25 18:41:49,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:41:49,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:50,108 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:41:50,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-25 18:41:50,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:41:50,428 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:41:50,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:50,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:50,538 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:41:50,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:50,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:50,697 INFO L354 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2021-11-25 18:41:50,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:50,872 INFO L354 Elim1Store]: treesize reduction 54, result has 36.5 percent of original size [2021-11-25 18:41:50,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:50,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:51,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:51,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:51,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:51,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:51,210 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:41:51,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:41:51,308 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_append_~node~0.base_101 Int) (v_ArrVal_3325 (Array Int Int))) (or (not (= (select |c_#valid| v_append_~node~0.base_101) 0)) (= (select (store |c_#valid| v_append_~node~0.base_101 1) (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_101 v_ArrVal_3325) |c_append_#in~head.base|) (+ |c_append_#in~head.offset| 4))) 1))) is different from false [2021-11-25 18:41:51,319 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_append_~node~0.base_101 Int) (v_ArrVal_3325 (Array Int Int))) (or (not (= (select |c_#valid| v_append_~node~0.base_101) 0)) (= (select (store |c_#valid| v_append_~node~0.base_101 1) (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_101 v_ArrVal_3325) |c_ULTIMATE.start_main_~list2~0#1.base|) (+ |c_ULTIMATE.start_main_~list2~0#1.offset| 4))) 1))) is different from false [2021-11-25 18:41:51,411 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:41:51,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-11-25 18:41:51,419 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:41:51,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 122 [2021-11-25 18:41:51,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:51,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:52,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156856700] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:41:52,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [287309796] [2021-11-25 18:41:52,217 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2021-11-25 18:41:52,217 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:41:52,218 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:41:52,218 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:41:52,218 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:41:52,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:52,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:52,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:52,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:52,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:52,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:52,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:52,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:52,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:52,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:52,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:52,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:52,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:52,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:52,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:52,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:52,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:41:52,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:52,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:52,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:52,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:52,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:52,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:52,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 18:41:52,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:52,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:52,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 18:41:52,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:52,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:52,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:52,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 18:41:52,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:52,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:52,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:52,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 18:41:52,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:52,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:52,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:52,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:52,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:52,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:52,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:52,464 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:41:52,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 40 [2021-11-25 18:41:52,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:52,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:52,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:52,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:52,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:52,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:41:52,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:41:52,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:41:52,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:52,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:52,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:41:52,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:52,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:52,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:41:52,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:52,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:52,595 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-25 18:41:52,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:52,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:52,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:52,618 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-25 18:41:52,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:52,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:52,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:52,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:52,660 INFO L354 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2021-11-25 18:41:52,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:52,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:52,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:52,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:52,714 INFO L354 Elim1Store]: treesize reduction 56, result has 39.8 percent of original size [2021-11-25 18:41:52,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:41:52,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:41:52,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:52,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:52,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:52,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:52,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:52,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2021-11-25 18:41:52,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:52,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:52,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:52,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:41:53,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:53,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:53,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:53,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:41:53,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:53,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:53,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:53,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:53,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:53,083 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:41:53,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 40 [2021-11-25 18:41:53,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:53,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:53,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:53,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:41:53,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:53,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:53,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:53,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:41:53,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:53,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:53,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:53,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:53,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:53,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2021-11-25 18:41:54,870 INFO L354 Elim1Store]: treesize reduction 40, result has 29.8 percent of original size [2021-11-25 18:41:54,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 569 treesize of output 566 [2021-11-25 18:41:56,520 INFO L354 Elim1Store]: treesize reduction 40, result has 29.8 percent of original size [2021-11-25 18:41:56,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 569 treesize of output 566 [2021-11-25 18:42:01,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:01,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:01,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:01,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:01,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:42:01,637 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:42:01,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 40 [2021-11-25 18:42:01,650 INFO L197 IcfgInterpreter]: Interpreting procedure append with input of size 102 for LOIs [2021-11-25 18:42:02,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:42:02,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:42:02,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:42:02,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:42:02,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:02,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:02,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:02,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:02,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:02,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:02,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:02,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:02,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:42:02,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:02,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:02,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:02,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:02,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:42:02,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:02,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:02,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:02,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:02,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:02,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:02,132 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:42:02,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:02,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:02,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:02,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:02,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:02,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:02,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:02,147 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:42:02,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:02,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:02,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:02,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:02,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:02,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:42:02,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:02,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:02,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:02,200 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:42:02,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:02,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:42:02,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:02,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:02,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:02,217 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:42:02,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:02,229 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:42:06,749 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13656#(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$.offset| append_~head.base) (+ append_~head.offset 4)) |append_#t~mem8.offset|) (= (select (select |#memory_$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$.offset| append_~node~0.base) (+ 5 append_~node~0.offset)) 0) (<= 0 append_~head.offset) (= |append_#in~head.offset| 0) (not (= (select |#valid| |append_#t~mem8.base|) 1)) (= (select (select |#memory_$Pointer$.offset| append_~node~0.base) (+ append_~node~0.offset 1)) (select (select |#memory_$Pointer$.offset| append_~head.base) (+ append_~head.offset 4))) (= |#NULL.offset| 0) (= (select |#valid| append_~head.base) 1) (= (select |#valid| append_~node~0.base) 1) (<= append_~input 127) (<= |append_#in~input| 127) (= (select (select |#memory_$Pointer$.base| append_~head.base) (+ append_~head.offset 4)) |append_#t~mem8.base|) (<= 0 |#StackHeapBarrier|) (<= (+ 9 append_~node~0.offset) (select |#length| append_~node~0.base)) (= |#NULL.base| 0))' at error location [2021-11-25 18:42:06,749 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:42:06,749 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:42:06,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 30 [2021-11-25 18:42:06,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239546094] [2021-11-25 18:42:06,750 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:42:06,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-25 18:42:06,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:42:06,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-25 18:42:06,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=3253, Unknown=7, NotChecked=234, Total=3782 [2021-11-25 18:42:06,751 INFO L87 Difference]: Start difference. First operand 279 states and 349 transitions. Second operand has 31 states, 30 states have (on average 2.933333333333333) internal successors, (88), 28 states have internal predecessors, (88), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-25 18:42:07,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:42:07,993 INFO L93 Difference]: Finished difference Result 333 states and 432 transitions. [2021-11-25 18:42:07,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-25 18:42:07,996 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.933333333333333) internal successors, (88), 28 states have internal predecessors, (88), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 49 [2021-11-25 18:42:07,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:42:07,998 INFO L225 Difference]: With dead ends: 333 [2021-11-25 18:42:07,998 INFO L226 Difference]: Without dead ends: 333 [2021-11-25 18:42:07,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 71 SyntacticMatches, 4 SemanticMatches, 76 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2089 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=514, Invalid=5187, Unknown=7, NotChecked=298, Total=6006 [2021-11-25 18:42:08,000 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 103 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 256 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:42:08,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 683 Invalid, 896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 610 Invalid, 0 Unknown, 256 Unchecked, 0.5s Time] [2021-11-25 18:42:08,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-11-25 18:42:08,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 284. [2021-11-25 18:42:08,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 229 states have (on average 1.314410480349345) internal successors, (301), 257 states have internal predecessors, (301), 19 states have call successors, (19), 10 states have call predecessors, (19), 11 states have return successors, (35), 16 states have call predecessors, (35), 19 states have call successors, (35) [2021-11-25 18:42:08,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 355 transitions. [2021-11-25 18:42:08,013 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 355 transitions. Word has length 49 [2021-11-25 18:42:08,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:42:08,013 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 355 transitions. [2021-11-25 18:42:08,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.933333333333333) internal successors, (88), 28 states have internal predecessors, (88), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-25 18:42:08,013 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 355 transitions. [2021-11-25 18:42:08,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-25 18:42:08,014 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:42:08,014 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:42:08,051 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-11-25 18:42:08,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:42:08,236 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting appendErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-25 18:42:08,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:42:08,236 INFO L85 PathProgramCache]: Analyzing trace with hash -494615207, now seen corresponding path program 1 times [2021-11-25 18:42:08,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:42:08,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635108431] [2021-11-25 18:42:08,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:42:08,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:42:08,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:42:08,803 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:42:08,803 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:42:08,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635108431] [2021-11-25 18:42:08,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635108431] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:42:08,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970333255] [2021-11-25 18:42:08,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:42:08,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:42:08,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:42:08,804 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:42:08,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-25 18:42:09,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:42:09,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-25 18:42:09,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:42:09,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:09,230 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:42:09,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-25 18:42:09,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:42:09,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:42:09,500 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:42:09,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:09,513 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:42:09,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:09,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:09,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:09,654 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:42:09,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:09,669 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:42:09,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:09,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 11 [2021-11-25 18:42:09,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:42:09,941 INFO L354 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2021-11-25 18:42:09,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:10,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:10,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:10,126 INFO L354 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2021-11-25 18:42:10,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:10,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:10,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:10,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:10,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:10,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:10,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:10,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:42:10,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:10,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:42:10,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:10,446 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:42:10,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:42:10,524 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3573 (Array Int Int)) (v_ArrVal_3574 (Array Int Int))) (let ((.cse0 (+ c_append_~head.offset 4))) (<= (+ 9 (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_3574) c_append_~head.base) .cse0)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_3573) c_append_~head.base) .cse0))))) (forall ((v_ArrVal_3574 (Array Int Int))) (<= 0 (+ 5 (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_3574) c_append_~head.base) (+ c_append_~head.offset 4)))))) is different from false [2021-11-25 18:42:10,945 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:42:10,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 82 treesize of output 83 [2021-11-25 18:42:10,952 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:42:10,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 83 treesize of output 73 [2021-11-25 18:42:10,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:42:10,964 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:42:10,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 103 treesize of output 103 [2021-11-25 18:42:10,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:42:10,977 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:42:10,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 152 treesize of output 140 [2021-11-25 18:42:11,017 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:42:11,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 215 treesize of output 229 [2021-11-25 18:42:11,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 229 treesize of output 209 [2021-11-25 18:42:11,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 209 treesize of output 185 [2021-11-25 18:42:13,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970333255] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:42:13,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2091196017] [2021-11-25 18:42:13,530 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2021-11-25 18:42:13,530 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:42:13,531 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:42:13,531 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:42:13,531 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:42:13,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:13,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:13,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:13,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:13,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:13,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:13,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:13,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:13,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:13,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:13,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:13,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:13,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:13,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:13,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:13,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:13,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:13,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:13,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:42:13,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:13,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:13,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:13,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:13,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 18:42:13,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:13,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:13,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 18:42:13,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:13,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:13,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:13,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 18:42:13,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:13,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:13,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:13,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 18:42:13,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:13,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:13,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:13,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:13,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:13,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:13,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:42:13,738 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:42:13,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 40 [2021-11-25 18:42:13,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:13,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:13,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:13,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:13,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:13,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:42:13,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:42:13,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:42:13,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:13,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:13,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:42:13,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:13,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:13,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:42:13,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:13,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:13,867 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-25 18:42:13,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:13,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:13,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:13,886 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-25 18:42:13,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:13,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:13,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:13,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:13,917 INFO L354 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2021-11-25 18:42:13,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:13,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:13,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:13,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:13,959 INFO L354 Elim1Store]: treesize reduction 56, result has 39.8 percent of original size [2021-11-25 18:42:13,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:13,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:42:14,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:14,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:14,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:14,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:42:14,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:14,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:14,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:14,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:42:14,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:14,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:14,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:14,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:14,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:14,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 18 [2021-11-25 18:42:14,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:14,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:14,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:14,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:14,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:42:14,274 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:42:14,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 40 [2021-11-25 18:42:14,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:14,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:14,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:14,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:14,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:14,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 18 [2021-11-25 18:42:14,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:14,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:14,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:14,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:42:14,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:14,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:14,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:14,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:42:15,946 INFO L354 Elim1Store]: treesize reduction 40, result has 29.8 percent of original size [2021-11-25 18:42:15,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 487 treesize of output 484 [2021-11-25 18:42:17,627 INFO L354 Elim1Store]: treesize reduction 40, result has 29.8 percent of original size [2021-11-25 18:42:17,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 487 treesize of output 484 [2021-11-25 18:42:21,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:21,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:21,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:21,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:21,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:42:21,891 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:42:21,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 40 [2021-11-25 18:42:21,905 INFO L197 IcfgInterpreter]: Interpreting procedure append with input of size 102 for LOIs [2021-11-25 18:42:22,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:42:22,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:42:22,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:42:22,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:22,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:22,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:22,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:22,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:42:22,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:22,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:22,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:22,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:22,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:42:22,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:22,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:22,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:22,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:22,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:22,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:22,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:22,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:22,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:22,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:22,446 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:42:22,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:22,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:22,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:22,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:22,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:22,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:22,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:22,461 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:42:22,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:22,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:42:22,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:42:22,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:22,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:22,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:22,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:22,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:22,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:22,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:22,518 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:42:22,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:22,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:22,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:22,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:22,528 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:42:22,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:22,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-25 18:42:22,547 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:42:31,307 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14557#(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$.offset| append_~head.base) (+ append_~head.offset 4)) |append_#t~mem8.offset|) (= (select (select |#memory_$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$.offset| append_~node~0.base) (+ 5 append_~node~0.offset)) 0) (<= 0 append_~head.offset) (or (< (select |#length| |append_#t~mem8.base|) (+ 9 |append_#t~mem8.offset|)) (< (+ 5 |append_#t~mem8.offset|) 0)) (= |append_#in~head.offset| 0) (= (select (select |#memory_$Pointer$.offset| append_~node~0.base) (+ append_~node~0.offset 1)) (select (select |#memory_$Pointer$.offset| append_~head.base) (+ append_~head.offset 4))) (= |#NULL.offset| 0) (= (select |#valid| append_~head.base) 1) (= (select |#valid| append_~node~0.base) 1) (<= append_~input 127) (<= |append_#in~input| 127) (= (select (select |#memory_$Pointer$.base| append_~head.base) (+ append_~head.offset 4)) |append_#t~mem8.base|) (<= 0 |#StackHeapBarrier|) (<= (+ 9 append_~node~0.offset) (select |#length| append_~node~0.base)) (= |#NULL.base| 0))' at error location [2021-11-25 18:42:31,307 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:42:31,307 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:42:31,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 30 [2021-11-25 18:42:31,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688330952] [2021-11-25 18:42:31,308 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:42:31,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-25 18:42:31,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:42:31,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-25 18:42:31,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=3503, Unknown=6, NotChecked=120, Total=3906 [2021-11-25 18:42:31,310 INFO L87 Difference]: Start difference. First operand 284 states and 355 transitions. Second operand has 31 states, 30 states have (on average 2.933333333333333) internal successors, (88), 28 states have internal predecessors, (88), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-25 18:42:33,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:42:33,991 INFO L93 Difference]: Finished difference Result 360 states and 460 transitions. [2021-11-25 18:42:33,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-25 18:42:33,991 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.933333333333333) internal successors, (88), 28 states have internal predecessors, (88), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 49 [2021-11-25 18:42:33,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:42:33,994 INFO L225 Difference]: With dead ends: 360 [2021-11-25 18:42:33,994 INFO L226 Difference]: Without dead ends: 360 [2021-11-25 18:42:33,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 2313 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=692, Invalid=6962, Unknown=6, NotChecked=172, Total=7832 [2021-11-25 18:42:33,996 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 128 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 1022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 308 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:42:33,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 777 Invalid, 1022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 677 Invalid, 0 Unknown, 308 Unchecked, 0.5s Time] [2021-11-25 18:42:33,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-11-25 18:42:34,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 322. [2021-11-25 18:42:34,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 261 states have (on average 1.2911877394636015) internal successors, (337), 288 states have internal predecessors, (337), 23 states have call successors, (23), 11 states have call predecessors, (23), 13 states have return successors, (45), 22 states have call predecessors, (45), 23 states have call successors, (45) [2021-11-25 18:42:34,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 405 transitions. [2021-11-25 18:42:34,010 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 405 transitions. Word has length 49 [2021-11-25 18:42:34,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:42:34,010 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 405 transitions. [2021-11-25 18:42:34,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.933333333333333) internal successors, (88), 28 states have internal predecessors, (88), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-25 18:42:34,011 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 405 transitions. [2021-11-25 18:42:34,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-25 18:42:34,012 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:42:34,012 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:42:34,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-25 18:42:34,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-25 18:42:34,231 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting appendErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-25 18:42:34,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:42:34,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1063733038, now seen corresponding path program 1 times [2021-11-25 18:42:34,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:42:34,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41259081] [2021-11-25 18:42:34,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:42:34,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:42:34,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:42:34,588 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:42:34,589 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:42:34,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41259081] [2021-11-25 18:42:34,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41259081] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:42:34,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796663570] [2021-11-25 18:42:34,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:42:34,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:42:34,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:42:34,590 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:42:34,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc4fd23-c7e9-4ae5-9df5-7ce4e6e3081e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-25 18:42:34,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:42:34,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-25 18:42:34,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:42:34,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:35,004 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:42:35,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-25 18:42:35,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:35,188 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-25 18:42:35,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 20 [2021-11-25 18:42:35,237 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:42:35,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:35,243 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-25 18:42:35,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 7 [2021-11-25 18:42:35,322 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:42:35,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:35,407 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-25 18:42:35,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:35,510 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:42:35,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:35,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 30 [2021-11-25 18:42:35,595 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:42:35,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:42:35,613 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3820 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_3820) c_append_~head.base) c_append_~head.offset) 0))) is different from false [2021-11-25 18:42:35,622 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3820 (Array Int Int)) (v_append_~node~0.base_109 Int)) (or (not (= (select |c_#valid| v_append_~node~0.base_109) 0)) (not (= (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_109 v_ArrVal_3820) |c_append_#in~head.base|) |c_append_#in~head.offset|) 0)))) is different from false [2021-11-25 18:42:35,632 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3820 (Array Int Int)) (v_append_~node~0.base_109 Int)) (or (not (= (select |c_#valid| v_append_~node~0.base_109) 0)) (not (= (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_109 v_ArrVal_3820) |c_ULTIMATE.start_main_~list2~0#1.base|) |c_ULTIMATE.start_main_~list2~0#1.offset|) 0)))) is different from false [2021-11-25 18:42:35,727 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-11-25 18:42:35,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:35,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:42:35,733 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-25 18:42:35,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:35,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:35,742 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 18:42:35,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 12 [2021-11-25 18:42:35,957 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-11-25 18:42:35,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-11-25 18:42:35,982 INFO L354 Elim1Store]: treesize reduction 10, result has 71.4 percent of original size [2021-11-25 18:42:35,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:35,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 50 [2021-11-25 18:42:35,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 50 treesize of output 46 [2021-11-25 18:42:36,282 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 18:42:36,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 12 [2021-11-25 18:42:36,727 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2021-11-25 18:42:36,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796663570] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:42:36,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [347444409] [2021-11-25 18:42:36,729 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2021-11-25 18:42:36,729 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:42:36,729 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:42:36,729 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:42:36,729 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:42:36,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:36,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:36,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:36,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:36,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:36,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:36,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:36,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:36,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:36,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:36,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:36,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:36,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:36,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:36,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:42:36,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:36,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:36,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:36,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:36,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:36,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:36,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 18:42:36,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:36,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:36,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:36,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:36,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 18:42:36,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:36,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:36,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:36,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 18:42:36,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:36,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:36,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:36,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:36,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:36,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 18:42:36,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:36,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:36,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:36,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:36,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:42:36,936 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:42:36,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 40 [2021-11-25 18:42:36,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:36,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:36,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:36,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:36,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:37,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:37,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:37,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:37,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:37,052 INFO L354 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2021-11-25 18:42:37,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:37,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:37,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:37,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:37,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:37,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:37,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:37,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:37,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:37,112 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-25 18:42:37,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:37,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:37,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:37,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:37,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:37,149 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-25 18:42:37,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:37,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:37,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:37,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:37,191 INFO L354 Elim1Store]: treesize reduction 66, result has 29.0 percent of original size [2021-11-25 18:42:37,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:37,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:37,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:37,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:37,224 INFO L354 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2021-11-25 18:42:37,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:37,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:37,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:42:37,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:37,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:37,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:37,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:37,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:37,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 18 [2021-11-25 18:42:37,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:37,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:37,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:37,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:42:37,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:37,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:37,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:37,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:42:37,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:37,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:37,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:37,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:37,341 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:42:37,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 45 [2021-11-25 18:42:37,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:37,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:37,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:37,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:42:37,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:37,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:37,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:37,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:37,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:37,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 18 [2021-11-25 18:42:37,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:37,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:37,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:37,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-11-25 18:42:37,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:37,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:37,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:37,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:37,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:42:37,866 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:42:37,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 40 [2021-11-25 18:42:37,885 INFO L197 IcfgInterpreter]: Interpreting procedure append with input of size 103 for LOIs [2021-11-25 18:42:40,028 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:42:46,704 WARN L227 SmtUtils]: Spent 6.48s on a formula simplification. DAG size of input: 219 DAG size of output: 113 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:43:20,120 WARN L227 SmtUtils]: Spent 5.76s on a formula simplification. DAG size of input: 227 DAG size of output: 109 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:43:40,164 WARN L227 SmtUtils]: Spent 6.25s on a formula simplification. DAG size of input: 236 DAG size of output: 115 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:44:03,066 WARN L227 SmtUtils]: Spent 6.30s on a formula simplification. DAG size of input: 208 DAG size of output: 102 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)