./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext2/length_test03-2.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_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/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_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext2/length_test03-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/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_b5374006-7d76-4731-ba9e-9faa858ce1ce/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 8d477dcc38abb71f88978d460e8393ef9ba09f24c134f3de362c4df2a3599c9a --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:03:53,414 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:03:53,417 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:03:53,479 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:03:53,480 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:03:53,486 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:03:53,488 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:03:53,493 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:03:53,496 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:03:53,502 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:03:53,504 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:03:53,506 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:03:53,506 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:03:53,509 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:03:53,512 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:03:53,517 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:03:53,519 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:03:53,520 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:03:53,524 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:03:53,532 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:03:53,535 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:03:53,536 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:03:53,540 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:03:53,541 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:03:53,551 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:03:53,552 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:03:53,552 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:03:53,554 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:03:53,555 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:03:53,557 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:03:53,557 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:03:53,558 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:03:53,560 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:03:53,561 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:03:53,563 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:03:53,563 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:03:53,564 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:03:53,564 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:03:53,565 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:03:53,566 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:03:53,567 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:03:53,568 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-25 18:03:53,622 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:03:53,622 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:03:53,623 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:03:53,623 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:03:53,624 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:03:53,624 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:03:53,624 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:03:53,624 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:03:53,625 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:03:53,625 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:03:53,626 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:03:53,626 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:03:53,626 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:03:53,627 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:03:53,627 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:03:53,627 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:03:53,627 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:03:53,627 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:03:53,628 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-25 18:03:53,628 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-25 18:03:53,629 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:03:53,629 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:03:53,629 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 18:03:53,631 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:03:53,631 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:03:53,631 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:03:53,631 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-25 18:03:53,631 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-25 18:03:53,632 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-25 18:03:53,632 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:03:53,632 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 18:03:53,632 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:03:53,633 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:03:53,633 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:03:53,633 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:03:53,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:03:53,634 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:03:53,634 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:03:53,634 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:03:53,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:03:53,634 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:03:53,635 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:03:53,635 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_b5374006-7d76-4731-ba9e-9faa858ce1ce/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d477dcc38abb71f88978d460e8393ef9ba09f24c134f3de362c4df2a3599c9a [2021-11-25 18:03:53,948 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:03:53,968 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:03:53,971 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:03:53,972 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:03:53,973 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:03:53,974 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/memsafety-ext2/length_test03-2.i [2021-11-25 18:03:54,048 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/data/393f8d2e4/62b68d74f2524c278a7b749f62ecd845/FLAG7da27d4f0 [2021-11-25 18:03:54,577 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:03:54,578 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/sv-benchmarks/c/memsafety-ext2/length_test03-2.i [2021-11-25 18:03:54,591 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/data/393f8d2e4/62b68d74f2524c278a7b749f62ecd845/FLAG7da27d4f0 [2021-11-25 18:03:54,883 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/data/393f8d2e4/62b68d74f2524c278a7b749f62ecd845 [2021-11-25 18:03:54,889 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:03:54,891 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:03:54,897 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:03:54,897 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:03:54,902 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:03:54,903 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:03:54" (1/1) ... [2021-11-25 18:03:54,907 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d848e77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:54, skipping insertion in model container [2021-11-25 18:03:54,907 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:03:54" (1/1) ... [2021-11-25 18:03:54,916 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:03:55,009 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:03:55,394 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:03:55,408 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:03:55,463 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:03:55,492 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:03:55,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:55 WrapperNode [2021-11-25 18:03:55,493 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:03:55,494 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:03:55,494 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:03:55,495 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:03:55,503 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:55" (1/1) ... [2021-11-25 18:03:55,533 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:55" (1/1) ... [2021-11-25 18:03:55,573 INFO L137 Inliner]: procedures = 123, calls = 38, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 97 [2021-11-25 18:03:55,574 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:03:55,575 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:03:55,576 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:03:55,576 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:03:55,584 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:55" (1/1) ... [2021-11-25 18:03:55,584 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:55" (1/1) ... [2021-11-25 18:03:55,600 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:55" (1/1) ... [2021-11-25 18:03:55,602 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:55" (1/1) ... [2021-11-25 18:03:55,615 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:55" (1/1) ... [2021-11-25 18:03:55,625 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:55" (1/1) ... [2021-11-25 18:03:55,631 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:55" (1/1) ... [2021-11-25 18:03:55,639 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:03:55,640 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:03:55,644 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:03:55,644 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:03:55,645 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:55" (1/1) ... [2021-11-25 18:03:55,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:03:55,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:03:55,678 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:03:55,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:03:55,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 18:03:55,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 18:03:55,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:03:55,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 18:03:55,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 18:03:55,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 18:03:55,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:03:55,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:03:55,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:03:55,727 INFO L130 BoogieDeclarations]: Found specification of procedure append [2021-11-25 18:03:55,727 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2021-11-25 18:03:55,889 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:03:55,905 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:03:56,296 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:03:56,371 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:03:56,377 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-25 18:03:56,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:03:56 BoogieIcfgContainer [2021-11-25 18:03:56,380 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:03:56,382 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:03:56,382 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:03:56,387 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:03:56,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:03:54" (1/3) ... [2021-11-25 18:03:56,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32ec5a3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:03:56, skipping insertion in model container [2021-11-25 18:03:56,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:55" (2/3) ... [2021-11-25 18:03:56,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32ec5a3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:03:56, skipping insertion in model container [2021-11-25 18:03:56,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:03:56" (3/3) ... [2021-11-25 18:03:56,390 INFO L111 eAbstractionObserver]: Analyzing ICFG length_test03-2.i [2021-11-25 18:03:56,395 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:03:56,396 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 59 error locations. [2021-11-25 18:03:56,458 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:03:56,468 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 18:03:56,468 INFO L340 AbstractCegarLoop]: Starting to check reachability of 59 error locations. [2021-11-25 18:03:56,510 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 18:03:56,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-11-25 18:03:56,524 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:03:56,525 INFO L514 BasicCegarLoop]: trace histogram [1, 1] [2021-11-25 18:03:56,525 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 18:03:56,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:03:56,531 INFO L85 PathProgramCache]: Analyzing trace with hash 6793, now seen corresponding path program 1 times [2021-11-25 18:03:56,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:03:56,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478042108] [2021-11-25 18:03:56,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:56,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:03:56,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:56,690 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 18:03:56,691 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:03:56,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478042108] [2021-11-25 18:03:56,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478042108] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:03:56,692 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:03:56,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-25 18:03:56,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180653601] [2021-11-25 18:03:56,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:03:56,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:03:56,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:03:56,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:03:56,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:03:56,730 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 18:03:56,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:03:56,900 INFO L93 Difference]: Finished difference Result 144 states and 153 transitions. [2021-11-25 18:03:56,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:03:56,903 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 18:03:56,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:03:56,915 INFO L225 Difference]: With dead ends: 144 [2021-11-25 18:03:56,916 INFO L226 Difference]: Without dead ends: 143 [2021-11-25 18:03:56,918 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 18:03:56,922 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 44 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:03:56,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 131 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:03:56,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-11-25 18:03:56,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 109. [2021-11-25 18:03:56,972 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 18:03:56,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 115 transitions. [2021-11-25 18:03:56,977 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 115 transitions. Word has length 2 [2021-11-25 18:03:56,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:03:56,979 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 115 transitions. [2021-11-25 18:03:56,979 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 18:03:56,979 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 115 transitions. [2021-11-25 18:03:56,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-11-25 18:03:56,980 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:03:56,980 INFO L514 BasicCegarLoop]: trace histogram [1, 1] [2021-11-25 18:03:56,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:03:56,981 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 18:03:56,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:03:56,982 INFO L85 PathProgramCache]: Analyzing trace with hash 6794, now seen corresponding path program 1 times [2021-11-25 18:03:56,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:03:56,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966488475] [2021-11-25 18:03:56,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:56,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:03:57,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:57,056 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 18:03:57,057 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:03:57,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966488475] [2021-11-25 18:03:57,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966488475] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:03:57,058 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:03:57,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-25 18:03:57,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553604599] [2021-11-25 18:03:57,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:03:57,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:03:57,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:03:57,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:03:57,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:03:57,064 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 18:03:57,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:03:57,223 INFO L93 Difference]: Finished difference Result 109 states and 116 transitions. [2021-11-25 18:03:57,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:03:57,227 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 18:03:57,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:03:57,229 INFO L225 Difference]: With dead ends: 109 [2021-11-25 18:03:57,232 INFO L226 Difference]: Without dead ends: 109 [2021-11-25 18:03:57,233 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 18:03:57,236 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 18:03:57,238 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 18:03:57,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-25 18:03:57,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2021-11-25 18:03:57,253 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 18:03:57,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 113 transitions. [2021-11-25 18:03:57,262 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 113 transitions. Word has length 2 [2021-11-25 18:03:57,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:03:57,262 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 113 transitions. [2021-11-25 18:03:57,263 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 18:03:57,263 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 113 transitions. [2021-11-25 18:03:57,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-25 18:03:57,263 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:03:57,263 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-25 18:03:57,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 18:03:57,264 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 18:03:57,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:03:57,264 INFO L85 PathProgramCache]: Analyzing trace with hash 6533168, now seen corresponding path program 1 times [2021-11-25 18:03:57,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:03:57,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106378693] [2021-11-25 18:03:57,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:57,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:03:57,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:57,341 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 18:03:57,341 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:03:57,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106378693] [2021-11-25 18:03:57,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106378693] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:03:57,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:03:57,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:03:57,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310316002] [2021-11-25 18:03:57,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:03:57,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:03:57,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:03:57,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:03:57,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:03:57,344 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 18:03:57,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:03:57,489 INFO L93 Difference]: Finished difference Result 122 states and 130 transitions. [2021-11-25 18:03:57,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:03:57,491 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 18:03:57,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:03:57,492 INFO L225 Difference]: With dead ends: 122 [2021-11-25 18:03:57,493 INFO L226 Difference]: Without dead ends: 122 [2021-11-25 18:03:57,493 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 18:03:57,495 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 18:03:57,498 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 18:03:57,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-25 18:03:57,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 109. [2021-11-25 18:03:57,509 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 18:03:57,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 118 transitions. [2021-11-25 18:03:57,514 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 118 transitions. Word has length 4 [2021-11-25 18:03:57,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:03:57,514 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 118 transitions. [2021-11-25 18:03:57,514 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 18:03:57,515 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 118 transitions. [2021-11-25 18:03:57,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-25 18:03:57,515 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:03:57,515 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-25 18:03:57,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 18:03:57,516 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 18:03:57,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:03:57,517 INFO L85 PathProgramCache]: Analyzing trace with hash 6533169, now seen corresponding path program 1 times [2021-11-25 18:03:57,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:03:57,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283639179] [2021-11-25 18:03:57,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:57,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:03:57,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:57,590 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 18:03:57,591 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:03:57,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283639179] [2021-11-25 18:03:57,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283639179] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:03:57,592 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:03:57,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:03:57,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274491728] [2021-11-25 18:03:57,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:03:57,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:03:57,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:03:57,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:03:57,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:03:57,594 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 18:03:57,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:03:57,683 INFO L93 Difference]: Finished difference Result 109 states and 119 transitions. [2021-11-25 18:03:57,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:03:57,683 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 18:03:57,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:03:57,685 INFO L225 Difference]: With dead ends: 109 [2021-11-25 18:03:57,685 INFO L226 Difference]: Without dead ends: 109 [2021-11-25 18:03:57,685 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 18:03:57,697 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 18:03:57,697 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 18:03:57,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-25 18:03:57,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2021-11-25 18:03:57,703 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 18:03:57,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 116 transitions. [2021-11-25 18:03:57,706 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 116 transitions. Word has length 4 [2021-11-25 18:03:57,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:03:57,711 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 116 transitions. [2021-11-25 18:03:57,712 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 18:03:57,712 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 116 transitions. [2021-11-25 18:03:57,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 18:03:57,712 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:03:57,713 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:03:57,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 18:03:57,713 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 18:03:57,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:03:57,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1960369197, now seen corresponding path program 1 times [2021-11-25 18:03:57,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:03:57,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61626183] [2021-11-25 18:03:57,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:57,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:03:57,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:57,835 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 18:03:57,836 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:03:57,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61626183] [2021-11-25 18:03:57,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61626183] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:03:57,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:03:57,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:03:57,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984976818] [2021-11-25 18:03:57,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:03:57,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:03:57,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:03:57,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:03:57,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:03:57,839 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 18:03:57,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:03:57,922 INFO L93 Difference]: Finished difference Result 102 states and 111 transitions. [2021-11-25 18:03:57,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:03:57,923 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 18:03:57,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:03:57,924 INFO L225 Difference]: With dead ends: 102 [2021-11-25 18:03:57,924 INFO L226 Difference]: Without dead ends: 102 [2021-11-25 18:03:57,925 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 18:03:57,926 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 18:03:57,926 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 18:03:57,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-25 18:03:57,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2021-11-25 18:03:57,933 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 18:03:57,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 111 transitions. [2021-11-25 18:03:57,935 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 111 transitions. Word has length 9 [2021-11-25 18:03:57,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:03:57,935 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 111 transitions. [2021-11-25 18:03:57,936 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 18:03:57,936 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 111 transitions. [2021-11-25 18:03:57,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 18:03:57,936 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:03:57,937 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:03:57,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 18:03:57,937 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 18:03:57,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:03:57,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1960369196, now seen corresponding path program 1 times [2021-11-25 18:03:57,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:03:57,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367098937] [2021-11-25 18:03:57,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:57,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:03:57,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:57,985 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 18:03:57,985 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:03:57,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367098937] [2021-11-25 18:03:57,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367098937] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:03:57,986 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:03:57,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:03:57,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338642664] [2021-11-25 18:03:57,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:03:57,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:03:57,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:03:57,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:03:57,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:03:57,988 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 18:03:58,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:03:58,077 INFO L93 Difference]: Finished difference Result 97 states and 106 transitions. [2021-11-25 18:03:58,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:03:58,077 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 18:03:58,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:03:58,079 INFO L225 Difference]: With dead ends: 97 [2021-11-25 18:03:58,079 INFO L226 Difference]: Without dead ends: 97 [2021-11-25 18:03:58,079 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 18:03:58,080 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 18:03:58,080 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 18:03:58,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-25 18:03:58,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2021-11-25 18:03:58,086 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 18:03:58,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 106 transitions. [2021-11-25 18:03:58,088 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 106 transitions. Word has length 9 [2021-11-25 18:03:58,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:03:58,088 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 106 transitions. [2021-11-25 18:03:58,089 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 18:03:58,089 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 106 transitions. [2021-11-25 18:03:58,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 18:03:58,089 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:03:58,089 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:03:58,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 18:03:58,090 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 18:03:58,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:03:58,090 INFO L85 PathProgramCache]: Analyzing trace with hash 641903031, now seen corresponding path program 1 times [2021-11-25 18:03:58,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:03:58,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573014743] [2021-11-25 18:03:58,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:58,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:03:58,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:58,192 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 18:03:58,192 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:03:58,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573014743] [2021-11-25 18:03:58,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573014743] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:03:58,192 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:03:58,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:03:58,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503585149] [2021-11-25 18:03:58,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:03:58,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:03:58,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:03:58,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:03:58,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:03:58,195 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 18:03:58,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:03:58,453 INFO L93 Difference]: Finished difference Result 191 states and 208 transitions. [2021-11-25 18:03:58,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:03:58,454 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 18:03:58,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:03:58,456 INFO L225 Difference]: With dead ends: 191 [2021-11-25 18:03:58,456 INFO L226 Difference]: Without dead ends: 191 [2021-11-25 18:03:58,456 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 18:03:58,457 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, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:03:58,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 166 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:03:58,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-25 18:03:58,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 122. [2021-11-25 18:03:58,465 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 18:03:58,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 155 transitions. [2021-11-25 18:03:58,466 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 155 transitions. Word has length 10 [2021-11-25 18:03:58,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:03:58,467 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 155 transitions. [2021-11-25 18:03:58,467 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 18:03:58,467 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 155 transitions. [2021-11-25 18:03:58,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 18:03:58,468 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:03:58,468 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:03:58,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 18:03:58,468 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 18:03:58,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:03:58,469 INFO L85 PathProgramCache]: Analyzing trace with hash 641903032, now seen corresponding path program 1 times [2021-11-25 18:03:58,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:03:58,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396668618] [2021-11-25 18:03:58,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:58,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:03:58,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:58,596 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 18:03:58,597 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:03:58,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396668618] [2021-11-25 18:03:58,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396668618] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:03:58,597 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:03:58,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:03:58,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414438719] [2021-11-25 18:03:58,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:03:58,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:03:58,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:03:58,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:03:58,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:03:58,599 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 18:03:58,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:03:58,900 INFO L93 Difference]: Finished difference Result 197 states and 216 transitions. [2021-11-25 18:03:58,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:03:58,905 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 18:03:58,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:03:58,906 INFO L225 Difference]: With dead ends: 197 [2021-11-25 18:03:58,906 INFO L226 Difference]: Without dead ends: 197 [2021-11-25 18:03:58,907 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 18:03:58,907 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 18:03:58,908 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 18:03:58,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-11-25 18:03:58,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 142. [2021-11-25 18:03:58,923 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 18:03:58,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 188 transitions. [2021-11-25 18:03:58,931 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 188 transitions. Word has length 10 [2021-11-25 18:03:58,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:03:58,931 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 188 transitions. [2021-11-25 18:03:58,932 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 18:03:58,932 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 188 transitions. [2021-11-25 18:03:58,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-25 18:03:58,933 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:03:58,933 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 18:03:58,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 18:03:58,933 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 18:03:58,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:03:58,934 INFO L85 PathProgramCache]: Analyzing trace with hash -2032407541, now seen corresponding path program 1 times [2021-11-25 18:03:58,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:03:58,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795645871] [2021-11-25 18:03:58,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:58,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:03:58,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:59,175 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 18:03:59,176 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:03:59,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795645871] [2021-11-25 18:03:59,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795645871] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:03:59,177 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:03:59,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-25 18:03:59,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324463426] [2021-11-25 18:03:59,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:03:59,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 18:03:59,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:03:59,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 18:03:59,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-25 18:03:59,179 INFO L87 Difference]: Start difference. First operand 142 states and 188 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:03:59,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:03:59,424 INFO L93 Difference]: Finished difference Result 197 states and 257 transitions. [2021-11-25 18:03:59,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 18:03:59,425 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-25 18:03:59,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:03:59,427 INFO L225 Difference]: With dead ends: 197 [2021-11-25 18:03:59,428 INFO L226 Difference]: Without dead ends: 197 [2021-11-25 18:03:59,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-25 18:03:59,429 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 46 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:03:59,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 315 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:03:59,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-11-25 18:03:59,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 148. [2021-11-25 18:03:59,440 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 18:03:59,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 195 transitions. [2021-11-25 18:03:59,443 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 195 transitions. Word has length 17 [2021-11-25 18:03:59,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:03:59,443 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 195 transitions. [2021-11-25 18:03:59,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:03:59,444 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 195 transitions. [2021-11-25 18:03:59,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-25 18:03:59,445 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:03:59,447 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 18:03:59,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 18:03:59,448 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 18:03:59,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:03:59,449 INFO L85 PathProgramCache]: Analyzing trace with hash 636810971, now seen corresponding path program 1 times [2021-11-25 18:03:59,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:03:59,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179414550] [2021-11-25 18:03:59,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:59,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:03:59,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:59,818 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 18:03:59,818 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:03:59,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179414550] [2021-11-25 18:03:59,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179414550] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:03:59,819 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:03:59,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-25 18:03:59,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706347612] [2021-11-25 18:03:59,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:03:59,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 18:03:59,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:03:59,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 18:03:59,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-25 18:03:59,820 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 18:04:00,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:04:00,125 INFO L93 Difference]: Finished difference Result 152 states and 199 transitions. [2021-11-25 18:04:00,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 18:04:00,126 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 18:04:00,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:04:00,128 INFO L225 Difference]: With dead ends: 152 [2021-11-25 18:04:00,128 INFO L226 Difference]: Without dead ends: 152 [2021-11-25 18:04:00,128 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 18:04:00,129 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 3 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:04:00,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 349 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 18:04:00,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-25 18:04:00,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2021-11-25 18:04:00,135 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 18:04:00,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 197 transitions. [2021-11-25 18:04:00,136 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 197 transitions. Word has length 18 [2021-11-25 18:04:00,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:04:00,137 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 197 transitions. [2021-11-25 18:04:00,137 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 18:04:00,137 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 197 transitions. [2021-11-25 18:04:00,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-25 18:04:00,138 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:04:00,139 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 18:04:00,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 18:04:00,139 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 18:04:00,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:04:00,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1812621737, now seen corresponding path program 1 times [2021-11-25 18:04:00,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:04:00,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744216103] [2021-11-25 18:04:00,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:04:00,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:04:00,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:04:00,194 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 18:04:00,194 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:04:00,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744216103] [2021-11-25 18:04:00,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744216103] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:04:00,195 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:04:00,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:04:00,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868365615] [2021-11-25 18:04:00,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:04:00,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:04:00,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:04:00,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:04:00,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:04:00,197 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 18:04:00,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:04:00,234 INFO L93 Difference]: Finished difference Result 126 states and 137 transitions. [2021-11-25 18:04:00,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:04:00,235 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 18:04:00,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:04:00,236 INFO L225 Difference]: With dead ends: 126 [2021-11-25 18:04:00,237 INFO L226 Difference]: Without dead ends: 126 [2021-11-25 18:04:00,237 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 18:04:00,238 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 18:04:00,238 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 18:04:00,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-25 18:04:00,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 115. [2021-11-25 18:04:00,243 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 18:04:00,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 125 transitions. [2021-11-25 18:04:00,244 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 125 transitions. Word has length 25 [2021-11-25 18:04:00,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:04:00,245 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 125 transitions. [2021-11-25 18:04:00,245 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 18:04:00,245 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 125 transitions. [2021-11-25 18:04:00,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-25 18:04:00,246 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:04:00,246 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 18:04:00,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-25 18:04:00,247 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 18:04:00,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:04:00,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1974296479, now seen corresponding path program 1 times [2021-11-25 18:04:00,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:04:00,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152103944] [2021-11-25 18:04:00,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:04:00,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:04:00,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:04:00,391 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 18:04:00,391 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:04:00,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152103944] [2021-11-25 18:04:00,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152103944] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:04:00,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95050618] [2021-11-25 18:04:00,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:04:00,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:04:00,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:04:00,394 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:04:00,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:04:00,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:04:00,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-25 18:04:00,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:04:00,593 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 18:04:00,970 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:04:00,971 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 18:04:01,036 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:04:01,036 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 18:04:01,054 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 18:04:01,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:04:01,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95050618] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:04:01,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [122380388] [2021-11-25 18:04:01,236 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2021-11-25 18:04:01,236 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:04:01,242 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:04:01,248 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:04:01,249 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:04:01,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:01,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:01,316 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 18:04:01,354 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 18:04:01,363 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 18:04:01,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:01,382 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 21 [2021-11-25 18:04:01,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:01,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 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 18:04:01,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:01,436 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 18:04:01,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:01,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:01,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:01,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:01,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:01,457 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 18:04:01,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:01,474 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 18:04:01,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:01,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:01,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 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 18:04:01,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:01,550 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 18:04:01,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:01,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:01,568 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 18:04:01,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:01,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:01,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:01,613 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 18:04:01,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:01,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:01,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:01,633 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 18:04:01,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:01,661 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 18:04:01,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:01,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:01,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:01,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:01,781 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:04:01,782 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 18:04:01,822 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 18:04:01,827 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 18:04:01,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:04:01,842 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 18:04:01,847 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 18:04:01,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:01,931 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 18:04:01,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:01,941 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 18:04:01,966 INFO L354 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2021-11-25 18:04:01,966 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 18:04:01,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:01,986 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 18:04:01,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:01,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 18:04:02,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:02,008 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 18:04:02,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:02,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:02,039 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-25 18:04:02,039 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 18:04:02,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:02,049 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 18:04:02,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:02,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:02,079 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-25 18:04:02,079 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 18:04:02,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:02,101 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 18:04:02,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:02,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:02,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:02,136 INFO L354 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2021-11-25 18:04:02,136 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 18:04:02,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:02,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:02,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:02,181 INFO L354 Elim1Store]: treesize reduction 66, result has 29.0 percent of original size [2021-11-25 18:04:02,181 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 18:04:02,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:02,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:02,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:02,255 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 18:04:02,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:02,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:02,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:02,269 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 18:04:02,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:02,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:02,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:02,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:02,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:02,292 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 18:04:02,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:02,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:02,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:02,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:02,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:04:02,350 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:04:02,350 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 18:04:02,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:02,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:02,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:02,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:02,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:02,461 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 18:04:02,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:02,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:02,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:02,476 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 18:04:02,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:02,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:02,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:02,493 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 18:04:02,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:02,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:02,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:02,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:02,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:04:02,638 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:04:02,638 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 18:04:02,666 INFO L197 IcfgInterpreter]: Interpreting procedure append with input of size 105 for LOIs [2021-11-25 18:04:04,843 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:04:31,189 WARN L227 SmtUtils]: Spent 5.25s on a formula simplification. DAG size of input: 229 DAG size of output: 109 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:04:50,937 WARN L227 SmtUtils]: Spent 6.71s on a formula simplification. DAG size of input: 238 DAG size of output: 115 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:04:51,200 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3152#(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 18:04:51,200 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:04:51,201 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:04:51,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 9 [2021-11-25 18:04:51,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491686057] [2021-11-25 18:04:51,201 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:04:51,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 18:04:51,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:04:51,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 18:04:51,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=889, Unknown=13, NotChecked=0, Total=1056 [2021-11-25 18:04:51,203 INFO L87 Difference]: Start difference. First operand 115 states and 125 transitions. Second operand has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 18:04:51,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:04:51,511 INFO L93 Difference]: Finished difference Result 137 states and 146 transitions. [2021-11-25 18:04:51,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 18:04:51,512 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2021-11-25 18:04:51,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:04:51,513 INFO L225 Difference]: With dead ends: 137 [2021-11-25 18:04:51,513 INFO L226 Difference]: Without dead ends: 137 [2021-11-25 18:04:51,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 46.5s TimeCoverageRelationStatistics Valid=191, Invalid=1056, Unknown=13, NotChecked=0, Total=1260 [2021-11-25 18:04:51,515 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 130 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:04:51,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 281 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 311 Invalid, 0 Unknown, 44 Unchecked, 0.2s Time] [2021-11-25 18:04:51,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-11-25 18:04:51,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 116. [2021-11-25 18:04:51,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 77 states have (on average 1.5844155844155845) internal successors, (122), 110 states have internal predecessors, (122), 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 18:04:51,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 128 transitions. [2021-11-25 18:04:51,520 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 128 transitions. Word has length 27 [2021-11-25 18:04:51,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:04:51,520 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 128 transitions. [2021-11-25 18:04:51,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 18:04:51,521 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 128 transitions. [2021-11-25 18:04:51,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-25 18:04:51,522 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:04:51,522 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 18:04:51,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:04:51,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:04:51,723 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 18:04:51,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:04:51,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1974296478, now seen corresponding path program 1 times [2021-11-25 18:04:51,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:04:51,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406431062] [2021-11-25 18:04:51,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:04:51,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:04:51,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:04:51,950 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 18:04:51,950 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:04:51,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406431062] [2021-11-25 18:04:51,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406431062] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:04:51,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721903756] [2021-11-25 18:04:51,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:04:51,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:04:51,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:04:51,952 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:04:51,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:04:52,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:04:52,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-25 18:04:52,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:04:52,106 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 18:04:52,112 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 18:04:52,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:52,312 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 18:04:52,326 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:04:52,326 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 18:04:52,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:52,479 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 18:04:52,491 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-25 18:04:52,492 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 18:04:52,501 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 18:04:52,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:04:52,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721903756] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:04:52,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [537714830] [2021-11-25 18:04:52,882 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2021-11-25 18:04:52,882 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:04:52,883 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:04:52,883 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:04:52,883 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:04:52,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:52,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:52,901 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 18:04:52,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:52,923 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 18:04:52,930 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 18:04:52,937 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 18:04:52,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:52,956 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 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:04:52,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:52,965 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 18:04:52,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:52,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:52,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:52,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:52,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:52,978 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 18:04:52,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:52,987 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 18:04:53,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,013 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 18:04:53,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,041 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 18:04:53,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 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 18:04:53,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,076 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 18:04:53,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,087 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 18:04:53,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,100 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 18:04:53,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:04:53,172 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:04:53,172 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 18:04:53,193 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 18:04:53,198 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 18:04:53,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:04:53,211 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 18:04:53,216 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 18:04:53,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,251 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 18:04:53,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,260 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 18:04:53,287 INFO L354 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2021-11-25 18:04:53,288 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 18:04:53,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,305 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 35 treesize of output 19 [2021-11-25 18:04:53,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,315 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 18:04:53,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 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 18:04:53,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,340 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 35 treesize of output 19 [2021-11-25 18:04:53,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,360 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-25 18:04:53,360 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 18:04:53,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,393 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-25 18:04:53,393 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 18:04:53,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,413 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 18:04:53,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,457 INFO L354 Elim1Store]: treesize reduction 66, result has 29.0 percent of original size [2021-11-25 18:04:53,458 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 18:04:53,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,498 INFO L354 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2021-11-25 18:04:53,499 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 18:04:53,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,559 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 18:04:53,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,574 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 18:04:53,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,586 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 18:04:53,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,661 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:04:53,662 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 18:04:53,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,730 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 18:04:53,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,743 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 18:04:53,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,766 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 18:04:53,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:53,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:04:53,855 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:04:53,855 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 18:04:53,874 INFO L197 IcfgInterpreter]: Interpreting procedure append with input of size 102 for LOIs [2021-11-25 18:04:55,664 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:05:22,245 WARN L227 SmtUtils]: Spent 5.43s 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 18:05:43,141 WARN L227 SmtUtils]: Spent 5.44s on a formula simplification. DAG size of input: 235 DAG size of output: 117 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:05:43,497 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3554#(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 18:05:43,497 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:05:43,497 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:05:43,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-11-25 18:05:43,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771750907] [2021-11-25 18:05:43,497 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:05:43,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 18:05:43,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:05:43,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 18:05:43,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1203, Unknown=15, NotChecked=0, Total=1406 [2021-11-25 18:05:43,500 INFO L87 Difference]: Start difference. First operand 116 states and 128 transitions. Second operand has 12 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 9 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 18:05:43,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:05:43,809 INFO L93 Difference]: Finished difference Result 145 states and 162 transitions. [2021-11-25 18:05:43,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 18:05:43,809 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 9 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2021-11-25 18:05:43,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:05:43,811 INFO L225 Difference]: With dead ends: 145 [2021-11-25 18:05:43,811 INFO L226 Difference]: Without dead ends: 145 [2021-11-25 18:05:43,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 48.1s TimeCoverageRelationStatistics Valid=204, Invalid=1263, Unknown=15, NotChecked=0, Total=1482 [2021-11-25 18:05:43,812 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 36 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:05:43,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 313 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 231 Invalid, 0 Unknown, 101 Unchecked, 0.2s Time] [2021-11-25 18:05:43,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-25 18:05:43,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 143. [2021-11-25 18:05:43,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 100 states have (on average 1.5) internal successors, (150), 135 states have internal predecessors, (150), 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 18:05:43,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 162 transitions. [2021-11-25 18:05:43,819 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 162 transitions. Word has length 27 [2021-11-25 18:05:43,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:05:43,820 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 162 transitions. [2021-11-25 18:05:43,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 9 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 18:05:43,820 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 162 transitions. [2021-11-25 18:05:43,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-25 18:05:43,822 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:05:43,822 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 18:05:43,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 18:05:44,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-25 18:05:44,032 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 18:05:44,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:05:44,033 INFO L85 PathProgramCache]: Analyzing trace with hash -936927503, now seen corresponding path program 1 times [2021-11-25 18:05:44,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:05:44,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840734993] [2021-11-25 18:05:44,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:05:44,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:05:44,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:05:44,529 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 18:05:44,530 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:05:44,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840734993] [2021-11-25 18:05:44,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840734993] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:05:44,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206388569] [2021-11-25 18:05:44,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:05:44,530 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:05:44,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:05:44,533 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:05:44,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 18:05:44,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:05:44,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-25 18:05:44,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:05:44,742 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 18:05:44,790 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:05:44,790 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 18:05:45,054 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 18:05:45,127 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:05:45,127 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 18:05:45,137 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 18:05:45,212 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:05:45,212 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 18:05:45,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:05:45,333 INFO L354 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2021-11-25 18:05:45,333 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 18:05:45,533 INFO L354 Elim1Store]: treesize reduction 54, result has 36.5 percent of original size [2021-11-25 18:05:45,533 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 18:05:45,603 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 18:05:45,804 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 38 treesize of output 36 [2021-11-25 18:05:45,845 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 18:05:45,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:05:45,918 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 18:05:45,967 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 18:05:45,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:05:46,556 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:05:46,556 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 18:05:46,578 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:05:46,578 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 18:05:46,587 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 18:05:46,595 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 18:05:47,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206388569] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:05:47,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1172341161] [2021-11-25 18:05:47,949 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2021-11-25 18:05:47,949 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:05:47,950 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:05:47,950 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:05:47,950 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:05:47,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:47,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:47,971 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 18:05:48,005 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 18:05:48,012 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 18:05:48,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:48,022 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 18:05:48,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:48,044 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 18:05:48,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:48,055 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 18:05:48,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:48,066 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 18:05:48,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:48,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:48,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:48,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:48,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:48,084 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 18:05:48,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:48,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:48,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 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 18:05:48,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:48,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:48,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 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 18:05:48,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:48,150 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 18:05:48,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:48,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:48,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:48,191 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 18:05:48,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:48,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:48,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:48,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 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 18:05:48,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:48,228 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 18:05:48,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:48,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:48,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:48,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:48,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:05:48,316 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:05:48,317 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 18:05:48,351 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 18:05:48,356 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 18:05:48,367 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 18:05:48,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:05:48,379 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 18:05:48,448 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 18:05:48,453 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 18:05:48,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:05:48,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:48,474 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 18:05:48,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:48,482 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 18:05:48,489 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 18:05:48,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:48,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:48,517 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-25 18:05:48,517 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 18:05:48,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:48,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:48,548 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-25 18:05:48,549 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 18:05:48,559 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 18:05:48,572 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 18:05:48,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:48,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:48,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:48,634 INFO L354 Elim1Store]: treesize reduction 56, result has 39.8 percent of original size [2021-11-25 18:05:48,634 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 18:05:48,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:48,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:48,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:48,683 INFO L354 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2021-11-25 18:05:48,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 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 18:05:48,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:48,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:48,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:48,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:48,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:48,742 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 18:05:48,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:48,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:48,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:48,760 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 18:05:49,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:49,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:49,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:49,171 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 18:05:49,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:49,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:49,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:49,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:49,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:05:49,219 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:05:49,219 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 18:05:49,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:49,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:49,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:49,260 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 18:05:49,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:49,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:49,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:49,534 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 18:05:49,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:49,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:49,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:49,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:49,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:49,548 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 18:05:53,164 INFO L197 IcfgInterpreter]: Interpreting procedure append with input of size 31 for LOIs [2021-11-25 18:05:53,256 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 11 treesize of output 7 [2021-11-25 18:05:53,263 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 18:05:53,268 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 18:05:53,281 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 18:05:53,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:53,288 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 18:05:53,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:53,296 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 18:05:53,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:53,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:53,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:53,315 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 18:05:53,324 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 18:05:53,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:53,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:53,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:53,334 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 18:05:53,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:53,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:53,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:53,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:53,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:53,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:53,357 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:05:53,357 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 18:05:53,365 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 19 treesize of output 1 [2021-11-25 18:05:53,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:53,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:53,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:53,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:53,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:53,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:53,384 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:05:53,384 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 18:05:53,414 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 18:05:53,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:53,423 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 18:05:53,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:53,430 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 18:05:53,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:53,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:53,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:53,451 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:05:53,451 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 18:05:53,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:53,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:53,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:53,463 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:05:53,464 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 18:05:53,478 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 18:05:53,495 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:05:56,640 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4041#(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 18:05:56,640 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:05:56,640 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:05:56,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-11-25 18:05:56,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992427099] [2021-11-25 18:05:56,641 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:05:56,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-25 18:05:56,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:05:56,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-25 18:05:56,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=2838, Unknown=10, NotChecked=0, Total=3080 [2021-11-25 18:05:56,644 INFO L87 Difference]: Start difference. First operand 143 states and 162 transitions. Second operand has 27 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 23 states have internal predecessors, (60), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:05:57,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:05:57,511 INFO L93 Difference]: Finished difference Result 192 states and 218 transitions. [2021-11-25 18:05:57,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-25 18:05:57,512 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 23 states have internal predecessors, (60), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2021-11-25 18:05:57,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:05:57,513 INFO L225 Difference]: With dead ends: 192 [2021-11-25 18:05:57,514 INFO L226 Difference]: Without dead ends: 192 [2021-11-25 18:05:57,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1359 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=292, Invalid=3358, Unknown=10, NotChecked=0, Total=3660 [2021-11-25 18:05:57,516 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 155 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 175 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:05:57,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 699 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 711 Invalid, 0 Unknown, 175 Unchecked, 0.6s Time] [2021-11-25 18:05:57,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-25 18:05:57,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 162. [2021-11-25 18:05:57,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 116 states have (on average 1.4741379310344827) internal successors, (171), 152 states have internal predecessors, (171), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (11), 4 states have call predecessors, (11), 6 states have call successors, (11) [2021-11-25 18:05:57,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 188 transitions. [2021-11-25 18:05:57,529 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 188 transitions. Word has length 33 [2021-11-25 18:05:57,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:05:57,530 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 188 transitions. [2021-11-25 18:05:57,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 23 states have internal predecessors, (60), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:05:57,531 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 188 transitions. [2021-11-25 18:05:57,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-25 18:05:57,534 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:05:57,534 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 18:05:57,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 18:05:57,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-25 18:05:57,740 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 18:05:57,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:05:57,741 INFO L85 PathProgramCache]: Analyzing trace with hash -936927502, now seen corresponding path program 1 times [2021-11-25 18:05:57,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:05:57,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413032230] [2021-11-25 18:05:57,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:05:57,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:05:57,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:05:58,435 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 18:05:58,435 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:05:58,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413032230] [2021-11-25 18:05:58,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413032230] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:05:58,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074225175] [2021-11-25 18:05:58,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:05:58,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:05:58,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:05:58,440 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:05:58,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 18:05:58,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:05:58,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-25 18:05:58,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:05:58,617 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 18:05:58,695 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:05:58,696 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 18:05:58,950 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 18:05:58,953 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 18:05:59,033 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:05:59,034 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 18:05:59,050 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:05:59,051 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 18:05:59,060 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 18:05:59,080 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 18:05:59,263 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:05:59,264 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 18:05:59,287 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:05:59,288 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 18:05:59,355 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 18:05:59,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:05:59,636 INFO L354 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2021-11-25 18:05:59,636 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 18:05:59,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:59,886 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 18:05:59,902 INFO L354 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2021-11-25 18:05:59,903 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 18:06:00,004 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 18:06:00,009 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 18:06:00,251 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 46 treesize of output 44 [2021-11-25 18:06:00,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 18:06:00,298 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 46 treesize of output 44 [2021-11-25 18:06:00,303 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 18:06:00,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:06:00,378 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 18:06:00,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:06:00,383 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 18:06:00,424 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 18:06:00,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:06:00,503 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_970 (Array Int Int))) (<= 0 (+ 5 (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_970) c_append_~head.base) (+ c_append_~head.offset 4))))) (forall ((v_ArrVal_969 (Array Int Int)) (v_ArrVal_970 (Array Int Int))) (let ((.cse0 (+ c_append_~head.offset 4))) (<= (+ 9 (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_970) c_append_~head.base) .cse0)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_969) c_append_~head.base) .cse0)))))) is different from false [2021-11-25 18:06:01,663 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:06:01,664 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 18:06:01,676 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:06:01,676 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 18:06:01,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:06:01,694 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:06:01,694 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 18:06:01,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:06:01,713 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:06:01,713 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 18:06:01,742 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:06:01,742 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 18:06:01,752 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 18:06:01,764 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 18:06:04,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074225175] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:06:04,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1685690878] [2021-11-25 18:06:04,154 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2021-11-25 18:06:04,154 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:06:04,155 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:06:04,155 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:06:04,155 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:06:04,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:04,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:04,179 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 18:06:04,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:04,202 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 18:06:04,210 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 18:06:04,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:06:04,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:04,239 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 18:06:04,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:04,251 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 18:06:04,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:04,260 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 18:06:04,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:04,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:04,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:04,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:04,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:04,278 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 18:06:04,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:04,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:04,305 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 18:06:04,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:04,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 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 18:06:04,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:04,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:04,334 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 18:06:04,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:04,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:04,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:04,370 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 18:06:04,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:04,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:04,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:04,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 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 18:06:04,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:04,397 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 18:06:04,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:04,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:04,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:04,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:04,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:06:04,458 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:06:04,458 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 18:06:04,485 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 18:06:04,488 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 18:06:04,497 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 18:06:04,502 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 11 treesize of output 7 [2021-11-25 18:06:04,507 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 15 treesize of output 1 [2021-11-25 18:06:04,548 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 18:06:04,553 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 18:06:04,557 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 15 treesize of output 1 [2021-11-25 18:06:04,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:04,566 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 18:06:04,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:04,572 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 18:06:04,576 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 18:06:04,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:04,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:04,595 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-25 18:06:04,595 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 18:06:04,599 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 18:06:04,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:04,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:04,622 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-25 18:06:04,622 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 18:06:04,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:04,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:04,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:04,665 INFO L354 Elim1Store]: treesize reduction 56, result has 39.8 percent of original size [2021-11-25 18:06:04,665 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 18:06:04,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:04,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:04,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:04,696 INFO L354 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2021-11-25 18:06:04,697 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 18:06:04,702 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 18:06:04,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:04,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:04,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:04,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:04,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:04,764 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 18:06:04,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:04,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:04,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:04,776 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 18:06:04,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:04,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:04,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:04,785 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 18:06:05,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:05,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:05,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:05,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:05,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:06:05,165 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:06:05,166 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 18:06:05,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:05,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:05,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:05,480 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 18:06:05,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:05,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:05,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:05,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:05,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:05,491 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 18:06:05,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:05,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:05,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:05,503 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 18:06:08,756 INFO L197 IcfgInterpreter]: Interpreting procedure append with input of size 31 for LOIs [2021-11-25 18:06:08,836 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 11 treesize of output 7 [2021-11-25 18:06:08,842 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 18:06:08,846 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 18:06:08,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:08,862 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 18:06:08,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:08,869 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 18:06:08,884 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 18:06:08,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:08,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:08,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:08,900 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 18:06:08,909 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 18:06:08,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:08,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:08,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:08,919 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 18:06:08,935 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 18:06:08,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:08,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:08,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:08,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:08,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:08,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:08,949 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:06:08,949 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 18:06:08,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:08,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:08,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:08,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:08,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:08,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:08,969 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:06:08,969 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 18:06:09,000 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 18:06:09,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:09,008 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 18:06:09,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:09,016 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 18:06:09,030 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 18:06:09,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:09,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:09,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:09,042 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:06:09,042 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 18:06:09,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:09,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:09,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:09,067 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:06:09,068 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 29 treesize of output 31 [2021-11-25 18:06:09,086 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:06:12,587 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4605#(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 18:06:12,587 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:06:12,587 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:06:12,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-11-25 18:06:12,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270252078] [2021-11-25 18:06:12,588 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:06:12,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-25 18:06:12,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:06:12,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-25 18:06:12,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=2865, Unknown=3, NotChecked=108, Total=3192 [2021-11-25 18:06:12,590 INFO L87 Difference]: Start difference. First operand 162 states and 188 transitions. Second operand has 27 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 23 states have internal predecessors, (60), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:06:14,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:06:14,126 INFO L93 Difference]: Finished difference Result 163 states and 188 transitions. [2021-11-25 18:06:14,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-25 18:06:14,128 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 23 states have internal predecessors, (60), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2021-11-25 18:06:14,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:06:14,130 INFO L225 Difference]: With dead ends: 163 [2021-11-25 18:06:14,130 INFO L226 Difference]: Without dead ends: 163 [2021-11-25 18:06:14,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1190 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=323, Invalid=4100, Unknown=3, NotChecked=130, Total=4556 [2021-11-25 18:06:14,137 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 81 mSDsluCounter, 872 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 872 SdHoareTripleChecker+Invalid, 994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 381 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:06:14,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 872 Invalid, 994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 607 Invalid, 0 Unknown, 381 Unchecked, 0.5s Time] [2021-11-25 18:06:14,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-11-25 18:06:14,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2021-11-25 18:06:14,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 116 states have (on average 1.4655172413793103) internal successors, (170), 152 states have internal predecessors, (170), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (11), 4 states have call predecessors, (11), 6 states have call successors, (11) [2021-11-25 18:06:14,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 187 transitions. [2021-11-25 18:06:14,153 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 187 transitions. Word has length 33 [2021-11-25 18:06:14,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:06:14,153 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 187 transitions. [2021-11-25 18:06:14,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 23 states have internal predecessors, (60), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:06:14,154 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 187 transitions. [2021-11-25 18:06:14,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-25 18:06:14,160 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:06:14,160 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 18:06:14,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 18:06:14,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:06:14,376 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 18:06:14,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:06:14,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1600978399, now seen corresponding path program 1 times [2021-11-25 18:06:14,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:06:14,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630834879] [2021-11-25 18:06:14,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:06:14,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:06:14,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:06:16,430 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 18:06:16,431 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:06:16,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630834879] [2021-11-25 18:06:16,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630834879] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:06:16,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590005993] [2021-11-25 18:06:16,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:06:16,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:06:16,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:06:16,432 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:06:16,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 18:06:16,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:06:16,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-25 18:06:16,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:06:16,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:06:16,613 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:06:16,613 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 18:06:16,654 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 18:06:16,661 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 18:06:16,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:16,715 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 18:06:16,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:16,729 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 21 treesize of output 20 [2021-11-25 18:06:17,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:17,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:17,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:17,778 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 18:06:17,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:17,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:17,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:17,798 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 18:06:17,833 INFO L354 Elim1Store]: treesize reduction 40, result has 32.2 percent of original size [2021-11-25 18:06:17,833 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 24 treesize of output 28 [2021-11-25 18:06:18,103 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:06:18,103 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 18:06:18,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 18:06:18,181 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 23 treesize of output 23 [2021-11-25 18:06:18,266 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 18:06:18,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:06:25,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590005993] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:06:25,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [790011706] [2021-11-25 18:06:25,186 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2021-11-25 18:06:25,186 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:06:25,187 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:06:25,187 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:06:25,187 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:06:25,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:25,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:25,201 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 18:06:25,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:06:25,223 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 18:06:25,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:25,230 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 18:06:25,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:25,253 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 18:06:25,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:25,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:25,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:25,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:25,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:25,269 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 18:06:25,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:25,280 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 18:06:25,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:25,291 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 18:06:25,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:25,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:25,308 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 18:06:25,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:25,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:25,318 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 18:06:25,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:25,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 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 18:06:25,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:25,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:25,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:25,353 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 18:06:25,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:25,364 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 18:06:25,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:25,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:25,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:25,388 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 18:06:25,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:25,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:25,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:25,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:25,439 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:06:25,439 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 18:06:25,461 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 18:06:25,465 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 18:06:25,474 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 18:06:25,479 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 18:06:25,483 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 18:06:25,514 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 18:06:25,519 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 18:06:25,524 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 18:06:25,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:25,533 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 18:06:25,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:25,540 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 18:06:25,546 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:06:25,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:25,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:25,577 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-25 18:06:25,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 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 18:06:25,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:25,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:25,600 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-25 18:06:25,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 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 18:06:25,606 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 18:06:25,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:25,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:25,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:25,646 INFO L354 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2021-11-25 18:06:25,647 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 18:06:25,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:25,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:25,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:25,699 INFO L354 Elim1Store]: treesize reduction 56, result has 39.8 percent of original size [2021-11-25 18:06:25,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 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 18:06:25,711 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 18:06:25,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:25,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:25,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:25,971 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 18:06:25,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:25,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:25,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:25,998 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 18:06:26,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:26,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:26,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:26,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:26,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:26,015 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 18:06:26,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:26,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:26,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:26,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:26,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:06:26,080 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:06:26,081 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 18:06:26,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:26,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:26,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:26,358 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 18:06:26,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:26,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:26,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:26,370 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 18:06:26,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:26,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:26,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:26,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:26,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:26,385 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 18:06:27,883 INFO L354 Elim1Store]: treesize reduction 40, result has 29.8 percent of original size [2021-11-25 18:06:27,883 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 18:06:29,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:29,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:29,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:29,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:29,152 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:06:29,152 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 18:06:29,187 INFO L197 IcfgInterpreter]: Interpreting procedure append with input of size 16 for LOIs [2021-11-25 18:06:29,196 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 18:06:29,201 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 18:06:29,214 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 18:06:29,220 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 18:06:29,226 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 18:06:29,289 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 18:06:29,294 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 18:06:29,299 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 18:06:29,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:29,313 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 18:06:29,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:29,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 18:06:29,358 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 19 treesize of output 1 [2021-11-25 18:06:29,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:29,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:29,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:29,382 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 18:06:29,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:29,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:29,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:29,398 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 32 [2021-11-25 18:06:29,406 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 18:06:29,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:29,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:29,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:29,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:29,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:29,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:29,437 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:06:29,438 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 18:06:29,447 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 19 treesize of output 1 [2021-11-25 18:06:29,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:29,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:29,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:29,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:29,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:29,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:29,467 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:06:29,467 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 18:06:29,503 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 18:06:29,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:29,512 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 18:06:29,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:29,521 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 18:06:29,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:29,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:29,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:29,545 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:06:29,546 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 18:06:29,555 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 18:06:29,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:29,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:29,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:29,575 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:06:29,575 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 18:06:29,594 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:06:38,044 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5155#(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 18:06:38,044 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:06:38,044 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:06:38,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 26 [2021-11-25 18:06:38,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569505941] [2021-11-25 18:06:38,045 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:06:38,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-25 18:06:38,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:06:38,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-25 18:06:38,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=2802, Unknown=15, NotChecked=0, Total=3080 [2021-11-25 18:06:38,047 INFO L87 Difference]: Start difference. First operand 162 states and 187 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 23 states have internal predecessors, (48), 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 18:06:38,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:06:38,997 INFO L93 Difference]: Finished difference Result 202 states and 230 transitions. [2021-11-25 18:06:38,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-25 18:06:38,997 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 23 states have internal predecessors, (48), 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 18:06:38,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:06:38,999 INFO L225 Difference]: With dead ends: 202 [2021-11-25 18:06:39,000 INFO L226 Difference]: Without dead ends: 202 [2021-11-25 18:06:39,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1300 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=279, Invalid=3009, Unknown=18, NotChecked=0, Total=3306 [2021-11-25 18:06:39,001 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 40 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:06:39,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 616 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 499 Invalid, 0 Unknown, 98 Unchecked, 0.8s Time] [2021-11-25 18:06:39,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-11-25 18:06:39,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 177. [2021-11-25 18:06:39,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 129 states have (on average 1.426356589147287) internal successors, (184), 165 states have internal predecessors, (184), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (13), 5 states have call predecessors, (13), 7 states have call successors, (13) [2021-11-25 18:06:39,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 204 transitions. [2021-11-25 18:06:39,010 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 204 transitions. Word has length 34 [2021-11-25 18:06:39,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:06:39,010 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 204 transitions. [2021-11-25 18:06:39,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 23 states have internal predecessors, (48), 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 18:06:39,011 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 204 transitions. [2021-11-25 18:06:39,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-25 18:06:39,012 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:06:39,012 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 18:06:39,040 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-25 18:06:39,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-25 18:06:39,228 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 18:06:39,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:06:39,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1126212485, now seen corresponding path program 1 times [2021-11-25 18:06:39,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:06:39,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83105860] [2021-11-25 18:06:39,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:06:39,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:06:39,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:06:41,096 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 18:06:41,097 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:06:41,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83105860] [2021-11-25 18:06:41,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83105860] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:06:41,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313430271] [2021-11-25 18:06:41,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:06:41,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:06:41,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:06:41,098 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:06:41,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 18:06:41,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:06:41,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-25 18:06:41,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:06:41,282 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 18:06:41,324 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:06:41,324 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 18:06:41,382 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 18:06:41,387 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 18:06:42,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:42,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:42,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:42,189 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 18:06:42,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:42,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:42,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:42,197 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 18:06:42,219 INFO L354 Elim1Store]: treesize reduction 40, result has 32.2 percent of original size [2021-11-25 18:06:42,219 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 24 treesize of output 28 [2021-11-25 18:06:42,435 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:06:42,435 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 18:06:42,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 18:06:42,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 18:06:42,566 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 11 treesize of output 7 [2021-11-25 18:06:42,671 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 18:06:42,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:06:51,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313430271] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:06:51,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [514340003] [2021-11-25 18:06:51,305 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2021-11-25 18:06:51,305 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:06:51,305 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:06:51,305 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:06:51,305 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:06:51,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,318 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 18:06:51,331 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 18:06:51,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 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 18:06:51,360 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 18:06:51,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,378 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 18:06:51,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,386 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 18:06:51,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,397 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 18:06:51,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,408 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 18:06:51,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 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 18:06:51,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,436 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 18:06:51,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,443 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 18:06:51,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,464 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 18:06:51,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,473 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 18:06:51,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,486 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 18:06:51,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,551 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:06:51,552 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 18:06:51,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:06:51,576 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 18:06:51,584 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 18:06:51,590 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 18:06:51,594 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 18:06:51,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,628 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 18:06:51,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,635 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 18:06:51,654 INFO L354 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2021-11-25 18:06:51,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 18:06:51,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,669 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 18:06:51,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,676 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 18:06:51,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,684 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 18:06:51,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,705 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-25 18:06:51,705 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 18:06:51,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,727 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-25 18:06:51,727 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 18:06:51,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,739 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 18:06:51,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,772 INFO L354 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2021-11-25 18:06:51,772 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 18:06:51,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,806 INFO L354 Elim1Store]: treesize reduction 66, result has 29.0 percent of original size [2021-11-25 18:06:51,806 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 18:06:51,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,816 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 18:06:51,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,854 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 18:06:51,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,863 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 18:06:51,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,878 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 18:06:51,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,917 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:06:51,918 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 18:06:51,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,962 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 18:06:51,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,974 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 18:06:51,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:51,986 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 18:06:52,163 INFO L354 Elim1Store]: treesize reduction 40, result has 29.8 percent of original size [2021-11-25 18:06:52,163 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 373 treesize of output 370 [2021-11-25 18:06:52,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:52,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:52,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:52,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:06:52,314 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:06:52,314 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 18:06:52,331 INFO L197 IcfgInterpreter]: Interpreting procedure append with input of size 162 for LOIs [2021-11-25 18:06:57,624 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:07:06,450 WARN L227 SmtUtils]: Spent 6.42s on a formula simplification. DAG size of input: 276 DAG size of output: 170 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:07:39,118 WARN L227 SmtUtils]: Spent 11.88s on a formula simplification. DAG size of input: 263 DAG size of output: 240 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:08:02,900 WARN L227 SmtUtils]: Spent 12.21s on a formula simplification. DAG size of input: 284 DAG size of output: 259 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:08:37,878 WARN L227 SmtUtils]: Spent 18.56s on a formula simplification. DAG size of input: 293 DAG size of output: 270 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:09:16,066 WARN L227 SmtUtils]: Spent 6.38s on a formula simplification. DAG size of input: 273 DAG size of output: 167 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:09:16,067 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5750#(and (= 0 (select |old(#valid)| append_~node~0.base)) (= |append_#in~head.offset| append_~head.offset) (exists ((|v_ULTIMATE.start_main_~list~0#1.base_BEFORE_CALL_33| Int)) (and (or (and (= (select (select |old(#memory_$Pointer$.offset)| (select (select |old(#memory_$Pointer$.base)| |v_ULTIMATE.start_main_~list~0#1.base_BEFORE_CALL_33|) 0)) 5) 0) (< |v_ULTIMATE.start_main_~list~0#1.base_BEFORE_CALL_33| |#StackHeapBarrier|) (= (select |old(#valid)| (select (select |old(#memory_$Pointer$.base)| |v_ULTIMATE.start_main_~list~0#1.base_BEFORE_CALL_33|) 0)) 1) (< (select (select |old(#memory_$Pointer$.base)| |v_ULTIMATE.start_main_~list~0#1.base_BEFORE_CALL_33|) 0) |#StackHeapBarrier|) (= (select (select |old(#memory_$Pointer$.base)| (select (select |old(#memory_$Pointer$.base)| |v_ULTIMATE.start_main_~list~0#1.base_BEFORE_CALL_33|) 0)) 5) 0) (= (select (select |old(#memory_$Pointer$.offset)| (select (select |old(#memory_$Pointer$.base)| |v_ULTIMATE.start_main_~list~0#1.base_BEFORE_CALL_33|) 0)) 1) 0) (= 9 (select |old(#length)| (select (select |old(#memory_$Pointer$.base)| |v_ULTIMATE.start_main_~list~0#1.base_BEFORE_CALL_33|) 0))) (= (select (select |old(#memory_$Pointer$.offset)| |v_ULTIMATE.start_main_~list~0#1.base_BEFORE_CALL_33|) 0) 0) (= (select (select |old(#memory_$Pointer$.base)| |v_ULTIMATE.start_main_~list~0#1.base_BEFORE_CALL_33|) 4) (select (select |old(#memory_$Pointer$.base)| |v_ULTIMATE.start_main_~list~0#1.base_BEFORE_CALL_33|) 0)) (< |append_#in~head.base| |#StackHeapBarrier|) (= (select (select |old(#memory_$Pointer$.offset)| |v_ULTIMATE.start_main_~list~0#1.base_BEFORE_CALL_33|) 4) 0) (= |append_#in~head.offset| 0) (= (select (select |old(#memory_$Pointer$.base)| (select (select |old(#memory_$Pointer$.base)| |v_ULTIMATE.start_main_~list~0#1.base_BEFORE_CALL_33|) 0)) 1) 0) (not (= |append_#in~head.base| 0)) (not (= |v_ULTIMATE.start_main_~list~0#1.base_BEFORE_CALL_33| 0)) (<= 0 (+ (select (select |old(#memory_int)| (select (select |old(#memory_$Pointer$.base)| |v_ULTIMATE.start_main_~list~0#1.base_BEFORE_CALL_33|) 0)) 0) 128)) (= |#NULL.offset| 0) (<= (select (select |old(#memory_int)| (select (select |old(#memory_$Pointer$.base)| |v_ULTIMATE.start_main_~list~0#1.base_BEFORE_CALL_33|) 0)) 0) 127) (not (= |v_ULTIMATE.start_main_~list~0#1.base_BEFORE_CALL_33| |append_#in~head.base|)) (not (= (select (select |old(#memory_$Pointer$.base)| |v_ULTIMATE.start_main_~list~0#1.base_BEFORE_CALL_33|) 0) 0)) (<= 8 (select |old(#length)| |v_ULTIMATE.start_main_~list~0#1.base_BEFORE_CALL_33|)) (= (select |old(#valid)| |v_ULTIMATE.start_main_~list~0#1.base_BEFORE_CALL_33|) 1) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0)) (and (= (select (select |old(#memory_$Pointer$.offset)| (select (select |old(#memory_$Pointer$.base)| |v_ULTIMATE.start_main_~list~0#1.base_BEFORE_CALL_33|) 0)) 5) 0) (< |v_ULTIMATE.start_main_~list~0#1.base_BEFORE_CALL_33| |#StackHeapBarrier|) (= (select |old(#valid)| (select (select |old(#memory_$Pointer$.base)| |v_ULTIMATE.start_main_~list~0#1.base_BEFORE_CALL_33|) 0)) 1) (= (select (select |old(#memory_$Pointer$.base)| |v_ULTIMATE.start_main_~list~0#1.base_BEFORE_CALL_33|) 0) |v_ULTIMATE.start_main_~list~0#1.base_BEFORE_CALL_33|) (< (select (select |old(#memory_$Pointer$.base)| |v_ULTIMATE.start_main_~list~0#1.base_BEFORE_CALL_33|) 0) |#StackHeapBarrier|) (= (select (select |old(#memory_$Pointer$.base)| (select (select |old(#memory_$Pointer$.base)| |v_ULTIMATE.start_main_~list~0#1.base_BEFORE_CALL_33|) 0)) 5) 0) (= (select (select |old(#memory_$Pointer$.offset)| (select (select |old(#memory_$Pointer$.base)| |v_ULTIMATE.start_main_~list~0#1.base_BEFORE_CALL_33|) 0)) 1) 0) (= 9 (select |old(#length)| (select (select |old(#memory_$Pointer$.base)| |v_ULTIMATE.start_main_~list~0#1.base_BEFORE_CALL_33|) 0))) (= (select (select |old(#memory_$Pointer$.offset)| |v_ULTIMATE.start_main_~list~0#1.base_BEFORE_CALL_33|) 0) 0) (= (select (select |old(#memory_$Pointer$.base)| |v_ULTIMATE.start_main_~list~0#1.base_BEFORE_CALL_33|) 4) (select (select |old(#memory_$Pointer$.base)| |v_ULTIMATE.start_main_~list~0#1.base_BEFORE_CALL_33|) 0)) (< |append_#in~head.base| |#StackHeapBarrier|) (= (select (select |old(#memory_$Pointer$.offset)| |v_ULTIMATE.start_main_~list~0#1.base_BEFORE_CALL_33|) 4) 0) (= |append_#in~head.offset| 0) (= (select (select |old(#memory_$Pointer$.base)| (select (select |old(#memory_$Pointer$.base)| |v_ULTIMATE.start_main_~list~0#1.base_BEFORE_CALL_33|) 0)) 1) 0) (not (= |append_#in~head.base| 0)) (not (= |v_ULTIMATE.start_main_~list~0#1.base_BEFORE_CALL_33| 0)) (= |#NULL.offset| 0) (not (= |v_ULTIMATE.start_main_~list~0#1.base_BEFORE_CALL_33| |append_#in~head.base|)) (not (= (select (select |old(#memory_$Pointer$.base)| |v_ULTIMATE.start_main_~list~0#1.base_BEFORE_CALL_33|) 0) 0)) (<= 8 (select |old(#length)| |v_ULTIMATE.start_main_~list~0#1.base_BEFORE_CALL_33|)) (= (select |old(#valid)| |v_ULTIMATE.start_main_~list~0#1.base_BEFORE_CALL_33|) 1) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) (not (= |v_ULTIMATE.start_main_~list~0#1.base_BEFORE_CALL_33| 1)) (not (= 2 |v_ULTIMATE.start_main_~list~0#1.base_BEFORE_CALL_33|)))) (not (= append_~node~0.base 0)) (= append_~node~0.offset 0) (<= 0 (+ 128 |append_#in~input|)) (= (select (select |#memory_$Pointer$.offset| append_~head.base) (+ append_~head.offset 4)) |append_#t~mem8.offset|) (< append_~node~0.base |#StackHeapBarrier|) (<= (+ 8 append_~head.offset) (select |#length| append_~head.base)) (= (store |old(#length)| append_~node~0.base 9) |#length|) (not (= (select |#valid| |append_#t~mem8.base|) 1)) (exists ((v_DerPreprocessor_37 Int)) (= |#memory_int| (store |old(#memory_int)| append_~node~0.base (store (store (store (select |old(#memory_int)| append_~node~0.base) append_~node~0.offset append_~input) (+ append_~node~0.offset 1) v_DerPreprocessor_37) (+ 5 append_~node~0.offset) (select (select |#memory_int| append_~node~0.base) (+ 5 append_~node~0.offset)))))) (= append_~head.base |append_#in~head.base|) (not (= |append_#in~head.base| 1)) (not (= 2 |append_#in~head.base|)) (= (select |#valid| append_~head.base) 1) (= |#valid| (store |old(#valid)| append_~node~0.base 1)) (exists ((v_DerPreprocessor_35 Int) (v_DerPreprocessor_33 Int)) (and (= (store |old(#memory_$Pointer$.base)| append_~node~0.base (store (store (store (select |old(#memory_$Pointer$.base)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_35) (+ append_~node~0.offset 1) (select (select (store |old(#memory_$Pointer$.base)| append_~node~0.base (store (select |old(#memory_$Pointer$.base)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_35)) append_~head.base) (+ append_~head.offset 4))) (+ 5 append_~node~0.offset) 0)) |#memory_$Pointer$.base|) (= (select (select (store |old(#memory_$Pointer$.offset)| append_~node~0.base (store (select |old(#memory_$Pointer$.offset)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_33)) append_~head.base) append_~head.offset) 0) (= (select (select (store |old(#memory_$Pointer$.base)| append_~node~0.base (store (select |old(#memory_$Pointer$.base)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_35)) append_~head.base) append_~head.offset) 0) (= |#memory_$Pointer$.offset| (store |old(#memory_$Pointer$.offset)| append_~node~0.base (store (store (store (select |old(#memory_$Pointer$.offset)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_33) (+ append_~node~0.offset 1) (select (select (store |old(#memory_$Pointer$.offset)| append_~node~0.base (store (select |old(#memory_$Pointer$.offset)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_33)) append_~head.base) (+ append_~head.offset 4))) (+ 5 append_~node~0.offset) 0))) (or (not (= (select (select (store |old(#memory_$Pointer$.base)| append_~node~0.base (store (select |old(#memory_$Pointer$.base)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_35)) append_~head.base) (+ append_~head.offset 4)) 0)) (not (= (select (select (store |old(#memory_$Pointer$.offset)| append_~node~0.base (store (select |old(#memory_$Pointer$.offset)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_33)) append_~head.base) (+ append_~head.offset 4)) 0))))) (= append_~input |append_#in~input|) (<= |append_#in~input| 127) (= (select (select |#memory_$Pointer$.base| append_~head.base) (+ append_~head.offset 4)) |append_#t~mem8.base|))' at error location [2021-11-25 18:09:16,067 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:09:16,068 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:09:16,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 27 [2021-11-25 18:09:16,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421039743] [2021-11-25 18:09:16,068 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:09:16,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-25 18:09:16,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:09:16,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-25 18:09:16,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=3258, Unknown=66, NotChecked=0, Total=3660 [2021-11-25 18:09:16,070 INFO L87 Difference]: Start difference. First operand 177 states and 204 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 24 states have internal predecessors, (51), 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 18:09:17,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:09:17,621 INFO L93 Difference]: Finished difference Result 206 states and 233 transitions. [2021-11-25 18:09:17,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-25 18:09:17,623 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 24 states have internal predecessors, (51), 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 18:09:17,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:09:17,624 INFO L225 Difference]: With dead ends: 206 [2021-11-25 18:09:17,624 INFO L226 Difference]: Without dead ends: 206 [2021-11-25 18:09:17,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1725 ImplicationChecksByTransitivity, 147.0s TimeCoverageRelationStatistics Valid=421, Invalid=4325, Unknown=84, NotChecked=0, Total=4830 [2021-11-25 18:09:17,627 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 52 mSDsluCounter, 770 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 780 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 259 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:09:17,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 780 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 566 Invalid, 0 Unknown, 259 Unchecked, 0.8s Time] [2021-11-25 18:09:17,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-11-25 18:09:17,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 179. [2021-11-25 18:09:17,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 131 states have (on average 1.4198473282442747) internal successors, (186), 167 states have internal predecessors, (186), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (12), 5 states have call predecessors, (12), 7 states have call successors, (12) [2021-11-25 18:09:17,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 205 transitions. [2021-11-25 18:09:17,635 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 205 transitions. Word has length 35 [2021-11-25 18:09:17,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:09:17,636 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 205 transitions. [2021-11-25 18:09:17,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 24 states have internal predecessors, (51), 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 18:09:17,636 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 205 transitions. [2021-11-25 18:09:17,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-25 18:09:17,637 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:09:17,637 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 18:09:17,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 18:09:17,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-25 18:09:17,864 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-25 18:09:17,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:09:17,865 INFO L85 PathProgramCache]: Analyzing trace with hash 626141202, now seen corresponding path program 1 times [2021-11-25 18:09:17,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:09:17,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27645194] [2021-11-25 18:09:17,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:09:17,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:09:17,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:09:17,915 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 18:09:17,915 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:09:17,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27645194] [2021-11-25 18:09:17,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27645194] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:09:17,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200567138] [2021-11-25 18:09:17,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:09:17,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:09:17,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:09:17,928 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:09:17,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 18:09:18,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:09:18,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:09:18,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:09:18,178 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 18:09:18,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:09:18,246 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 18:09:18,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200567138] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:09:18,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1587422399] [2021-11-25 18:09:18,249 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2021-11-25 18:09:18,249 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:09:18,249 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:09:18,250 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:09:18,250 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:09:18,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,265 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 18:09:18,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:09:18,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,289 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 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-25 18:09:18,303 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 18:09:18,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 18:09:18,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,334 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 18:09:18,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,342 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 18:09:18,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,350 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 18:09:18,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,371 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 18:09:18,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,382 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 21 [2021-11-25 18:09:18,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,392 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 18:09:18,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,416 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 18:09:18,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,428 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 18:09:18,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,440 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 18:09:18,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,500 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:09:18,501 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 18:09:18,520 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 18:09:18,524 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 18:09:18,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:09:18,537 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 18:09:18,541 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 18:09:18,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,574 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 0 case distinctions, treesize of input 28 treesize of output 23 [2021-11-25 18:09:18,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,581 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 18:09:18,605 INFO L354 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2021-11-25 18:09:18,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 18:09:18,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,622 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 18:09:18,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,630 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 18:09:18,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,639 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 18:09:18,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,664 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-25 18:09:18,665 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 18:09:18,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,674 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 18:09:18,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,704 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-25 18:09:18,704 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 1 case distinctions, treesize of input 30 treesize of output 42 [2021-11-25 18:09:18,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,751 INFO L354 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2021-11-25 18:09:18,752 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 18:09:18,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,761 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 18:09:18,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,809 INFO L354 Elim1Store]: treesize reduction 66, result has 29.0 percent of original size [2021-11-25 18:09:18,809 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 18:09:18,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,864 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 18:09:18,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,875 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 18:09:18,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,888 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 18:09:18,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:18,947 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:09:18,947 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 18:09:18,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:18,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:19,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:19,000 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 18:09:19,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:19,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:19,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:19,008 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 18:09:19,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:19,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:19,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:19,028 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 18:09:19,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:19,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:19,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:19,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:19,622 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:09:19,622 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 18:09:19,636 INFO L197 IcfgInterpreter]: Interpreting procedure append with input of size 102 for LOIs [2021-11-25 18:09:21,040 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:09:45,393 WARN L227 SmtUtils]: Spent 5.00s 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 18:10:04,171 WARN L227 SmtUtils]: Spent 5.35s on a formula simplification. DAG size of input: 235 DAG size of output: 118 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:10:04,720 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6416#(and (= |ULTIMATE.start_main_~list2~0#1.offset| 0) (<= 0 (+ 128 |ULTIMATE.start_main_~userInput~1#1|)) (<= 6 |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|) (= |#NULL.base| 0))' at error location [2021-11-25 18:10:04,720 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:10:04,720 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:10:04,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-25 18:10:04,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727333110] [2021-11-25 18:10:04,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:10:04,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:10:04,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:10:04,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:10:04,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=822, Unknown=13, NotChecked=0, Total=930 [2021-11-25 18:10:04,723 INFO L87 Difference]: Start difference. First operand 179 states and 205 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 18:10:04,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:10:04,805 INFO L93 Difference]: Finished difference Result 216 states and 252 transitions. [2021-11-25 18:10:04,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:10:04,806 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 18:10:04,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:10:04,807 INFO L225 Difference]: With dead ends: 216 [2021-11-25 18:10:04,808 INFO L226 Difference]: Without dead ends: 216 [2021-11-25 18:10:04,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 43.7s TimeCoverageRelationStatistics Valid=95, Invalid=822, Unknown=13, NotChecked=0, Total=930 [2021-11-25 18:10:04,809 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 66 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:10:04,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 235 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:10:04,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-11-25 18:10:04,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 206. [2021-11-25 18:10:04,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 153 states have (on average 1.4248366013071896) internal successors, (218), 188 states have internal predecessors, (218), 12 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (22), 11 states have call predecessors, (22), 12 states have call successors, (22) [2021-11-25 18:10:04,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 252 transitions. [2021-11-25 18:10:04,819 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 252 transitions. Word has length 39 [2021-11-25 18:10:04,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:10:04,819 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 252 transitions. [2021-11-25 18:10:04,819 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 18:10:04,820 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 252 transitions. [2021-11-25 18:10:04,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-25 18:10:04,821 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:10:04,821 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 18:10:04,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 18:10:05,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-25 18:10:05,032 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting appendErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-25 18:10:05,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:10:05,033 INFO L85 PathProgramCache]: Analyzing trace with hash 186828780, now seen corresponding path program 1 times [2021-11-25 18:10:05,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:10:05,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672830196] [2021-11-25 18:10:05,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:10:05,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:10:05,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:10:05,396 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 18:10:05,396 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:10:05,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672830196] [2021-11-25 18:10:05,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672830196] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:10:05,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060177559] [2021-11-25 18:10:05,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:10:05,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:10:05,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:10:05,398 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:10:05,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 18:10:05,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:10:05,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-25 18:10:05,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:10:05,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:05,766 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 18:10:05,771 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:10:05,771 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 18:10:05,793 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 18:10:05,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:10:06,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:10:06,025 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 18:10:06,158 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:10:06,158 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 18:10:06,264 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 18:10:06,264 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 18:10:06,316 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 18:10:06,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060177559] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:10:06,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [606136631] [2021-11-25 18:10:06,318 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2021-11-25 18:10:06,318 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:10:06,319 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:10:06,319 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:10:06,319 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:10:06,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,342 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 18:10:06,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:10:06,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:10:06,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,365 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 30 treesize of output 21 [2021-11-25 18:10:06,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 18:10:06,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,400 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 18:10:06,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,408 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 18:10:06,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,424 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 18:10:06,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,446 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 18:10:06,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,456 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 18:10:06,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,466 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 18:10:06,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,488 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 18:10:06,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,499 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 18:10:06,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 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 18:10:06,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,574 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:10:06,575 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 18:10:06,606 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 18:10:06,610 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 18:10:06,617 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 18:10:06,621 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 18:10:06,627 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 18:10:06,669 INFO L354 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2021-11-25 18:10:06,669 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 18:10:06,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,675 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 18:10:06,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,683 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 18:10:06,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,693 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 18:10:06,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,712 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 18:10:06,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,722 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 18:10:06,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,758 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-25 18:10:06,758 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 18:10:06,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,782 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-25 18:10:06,782 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 18:10:06,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,792 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 18:10:06,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,845 INFO L354 Elim1Store]: treesize reduction 66, result has 29.0 percent of original size [2021-11-25 18:10:06,845 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 18:10:06,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,884 INFO L354 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2021-11-25 18:10:06,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 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 18:10:06,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,895 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 18:10:06,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,948 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 18:10:06,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,959 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 18:10:06,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,968 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 18:10:07,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:07,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:07,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:07,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:07,038 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:10:07,038 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 18:10:07,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:07,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:07,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:07,083 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 18:10:07,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:07,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:07,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:07,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:07,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:07,094 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 18:10:07,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:07,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:07,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:07,111 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 18:10:07,249 INFO L354 Elim1Store]: treesize reduction 40, result has 29.8 percent of original size [2021-11-25 18:10:07,249 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 409 treesize of output 406 [2021-11-25 18:10:07,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:07,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:07,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:07,443 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:10:07,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 116 treesize of output 47 [2021-11-25 18:10:07,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:07,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:07,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:07,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2021-11-25 18:10:07,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:10:07,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 18:10:07,483 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:10:07,541 INFO L354 Elim1Store]: treesize reduction 40, result has 29.8 percent of original size [2021-11-25 18:10:07,542 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 409 treesize of output 406 [2021-11-25 18:10:07,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:07,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:07,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:07,762 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:10:07,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 120 treesize of output 51 [2021-11-25 18:10:07,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:07,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:07,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:07,779 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:10:07,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 4 case distinctions, treesize of input 31 treesize of output 13 [2021-11-25 18:10:07,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:10:07,802 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:10:07,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-11-25 18:10:07,814 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:10:07,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:10:07,832 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:10:08,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:08,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:08,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:08,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:08,394 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:10:08,396 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 18:10:08,421 INFO L197 IcfgInterpreter]: Interpreting procedure append with input of size 103 for LOIs [2021-11-25 18:10:09,747 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:10:41,047 WARN L227 SmtUtils]: Spent 7.25s 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 18:11:01,723 WARN L227 SmtUtils]: Spent 7.16s 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 18:11:03,118 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7135#(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 18:11:03,118 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:11:03,118 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:11:03,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 26 [2021-11-25 18:11:03,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780461773] [2021-11-25 18:11:03,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:11:03,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-25 18:11:03,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:11:03,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-25 18:11:03,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=2119, Unknown=14, NotChecked=0, Total=2450 [2021-11-25 18:11:03,121 INFO L87 Difference]: Start difference. First operand 206 states and 252 transitions. Second operand has 27 states, 26 states have (on average 3.576923076923077) internal successors, (93), 23 states have internal predecessors, (93), 6 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-25 18:11:03,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:11:03,835 INFO L93 Difference]: Finished difference Result 233 states and 273 transitions. [2021-11-25 18:11:03,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 18:11:03,835 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.576923076923077) internal successors, (93), 23 states have internal predecessors, (93), 6 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 42 [2021-11-25 18:11:03,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:11:03,837 INFO L225 Difference]: With dead ends: 233 [2021-11-25 18:11:03,838 INFO L226 Difference]: Without dead ends: 233 [2021-11-25 18:11:03,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 93 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 54.1s TimeCoverageRelationStatistics Valid=413, Invalid=2543, Unknown=14, NotChecked=0, Total=2970 [2021-11-25 18:11:03,839 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 484 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 227 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:11:03,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [484 Valid, 415 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 560 Invalid, 0 Unknown, 227 Unchecked, 0.4s Time] [2021-11-25 18:11:03,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-11-25 18:11:03,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 198. [2021-11-25 18:11:03,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 153 states have (on average 1.3660130718954249) internal successors, (209), 180 states have internal predecessors, (209), 12 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (22), 11 states have call predecessors, (22), 12 states have call successors, (22) [2021-11-25 18:11:03,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 243 transitions. [2021-11-25 18:11:03,859 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 243 transitions. Word has length 42 [2021-11-25 18:11:03,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:11:03,861 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 243 transitions. [2021-11-25 18:11:03,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.576923076923077) internal successors, (93), 23 states have internal predecessors, (93), 6 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-25 18:11:03,862 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 243 transitions. [2021-11-25 18:11:03,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-25 18:11:03,869 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:11:03,869 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 18:11:03,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 18:11:04,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:11:04,091 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting appendErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-25 18:11:04,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:11:04,091 INFO L85 PathProgramCache]: Analyzing trace with hash -486855849, now seen corresponding path program 1 times [2021-11-25 18:11:04,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:11:04,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294178950] [2021-11-25 18:11:04,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:11:04,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:11:04,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:11:04,598 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 18:11:04,598 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:11:04,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294178950] [2021-11-25 18:11:04,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294178950] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:11:04,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718174579] [2021-11-25 18:11:04,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:11:04,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:11:04,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:11:04,599 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:11:04,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 18:11:04,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:11:04,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-25 18:11:04,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:11:04,794 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 18:11:04,969 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:11:04,970 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 18:11:05,176 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 18:11:05,249 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:11:05,249 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 18:11:05,256 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 18:11:05,338 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:11:05,338 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 18:11:05,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:11:05,456 INFO L354 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2021-11-25 18:11:05,456 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 18:11:05,601 INFO L354 Elim1Store]: treesize reduction 54, result has 36.5 percent of original size [2021-11-25 18:11:05,601 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 18:11:05,664 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 18:11:05,775 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 18:11:05,802 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 18:11:05,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:11:05,880 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 18:11:05,935 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 18:11:05,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:11:06,033 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2018 (Array Int Int)) (v_append_~node~0.base_64 Int)) (or (= (select (store |c_#valid| v_append_~node~0.base_64 1) (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_64 v_ArrVal_2018) |c_append_#in~head.base|) (+ |c_append_#in~head.offset| 4))) 1) (not (= (select |c_#valid| v_append_~node~0.base_64) 0)))) is different from false [2021-11-25 18:11:06,043 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2018 (Array Int Int)) (v_append_~node~0.base_64 Int)) (or (= (select (store |c_#valid| v_append_~node~0.base_64 1) (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_64 v_ArrVal_2018) |c_ULTIMATE.start_main_~list2~0#1.base|) (+ |c_ULTIMATE.start_main_~list2~0#1.offset| 4))) 1) (not (= (select |c_#valid| v_append_~node~0.base_64) 0)))) is different from false [2021-11-25 18:11:06,145 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:11:06,146 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 18:11:06,154 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:11:06,154 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 332 treesize of output 218 [2021-11-25 18:11:06,159 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 182 treesize of output 174 [2021-11-25 18:11:06,163 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 174 treesize of output 158 [2021-11-25 18:11:06,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718174579] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:11:06,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1554464607] [2021-11-25 18:11:06,973 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2021-11-25 18:11:06,973 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:11:06,973 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:11:06,973 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:11:06,973 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:11:06,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:06,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:06,990 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 18:11:07,005 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 18:11:07,013 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 18:11:07,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:07,022 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 18:11:07,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:07,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:07,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:07,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:07,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:07,043 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 18:11:07,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:07,052 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 18:11:07,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:07,059 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 18:11:07,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:07,065 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 18:11:07,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:07,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:07,082 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 18:11:07,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:07,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 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 18:11:07,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:07,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:07,100 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 18:11:07,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:07,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:07,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:07,117 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 18:11:07,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:07,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:07,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:07,128 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 18:11:07,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:07,138 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 18:11:07,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:07,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:07,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:07,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:07,203 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:11:07,203 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 18:11:07,224 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 18:11:07,229 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 18:11:07,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:11:07,241 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 15 treesize of output 1 [2021-11-25 18:11:07,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:11:07,282 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 11 treesize of output 7 [2021-11-25 18:11:07,286 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 18:11:07,290 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 18:11:07,297 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 18:11:07,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:07,302 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 18:11:07,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:07,308 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 18:11:07,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:07,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:07,334 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-25 18:11:07,335 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 18:11:07,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:07,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:07,356 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-25 18:11:07,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 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 18:11:07,363 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 18:11:07,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:07,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:07,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:07,399 INFO L354 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2021-11-25 18:11:07,399 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 18:11:07,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:07,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:07,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:07,451 INFO L354 Elim1Store]: treesize reduction 56, result has 39.8 percent of original size [2021-11-25 18:11:07,451 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 18:11:07,465 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 18:11:07,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:07,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:07,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:07,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:07,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:07,506 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 18:11:07,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:07,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:07,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:07,517 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 18:11:07,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:07,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:07,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:07,526 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 18:11:07,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:07,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:07,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:07,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:07,827 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:11:07,827 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 18:11:08,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:08,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:08,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:08,102 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 18:11:08,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:08,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:08,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:08,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:08,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:08,113 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 18:11:08,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:08,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:08,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:08,120 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 18:11:09,804 INFO L354 Elim1Store]: treesize reduction 40, result has 29.8 percent of original size [2021-11-25 18:11:09,804 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 651 treesize of output 648 [2021-11-25 18:11:11,530 INFO L354 Elim1Store]: treesize reduction 40, result has 29.8 percent of original size [2021-11-25 18:11:11,530 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 651 treesize of output 648 [2021-11-25 18:11:14,244 INFO L354 Elim1Store]: treesize reduction 40, result has 29.8 percent of original size [2021-11-25 18:11:14,245 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 622 treesize of output 619 [2021-11-25 18:11:16,326 INFO L354 Elim1Store]: treesize reduction 40, result has 29.8 percent of original size [2021-11-25 18:11:16,327 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 622 treesize of output 619 [2021-11-25 18:11:18,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:18,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:18,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:18,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:18,894 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:11:18,894 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 18:11:18,911 INFO L197 IcfgInterpreter]: Interpreting procedure append with input of size 105 for LOIs [2021-11-25 18:11:19,344 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 18:11:19,348 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 18:11:19,355 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 18:11:19,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:19,367 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 18:11:19,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:19,375 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 18:11:19,381 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 18:11:19,394 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 18:11:19,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:19,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:19,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:19,403 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 18:11:19,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:19,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:19,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:19,416 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 18:11:19,429 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 18:11:19,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:19,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:19,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:19,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:19,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:19,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:19,442 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:11:19,442 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 18:11:19,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:19,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:19,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:19,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:19,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:19,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:19,456 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:11:19,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 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 18:11:19,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:19,478 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 18:11:19,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:19,486 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 18:11:19,491 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 18:11:19,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:11:19,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:19,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:19,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:19,511 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:11:19,512 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 18:11:19,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:19,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:19,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:19,522 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:11:19,522 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 18:11:19,534 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:11:23,660 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7826#(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 18:11:23,660 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:11:23,660 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:11:23,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 31 [2021-11-25 18:11:23,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637428123] [2021-11-25 18:11:23,660 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:11:23,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-25 18:11:23,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:11:23,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-25 18:11:23,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=3364, Unknown=13, NotChecked=238, Total=3906 [2021-11-25 18:11:23,663 INFO L87 Difference]: Start difference. First operand 198 states and 243 transitions. Second operand has 32 states, 31 states have (on average 2.838709677419355) internal successors, (88), 29 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 18:11:25,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:11:25,064 INFO L93 Difference]: Finished difference Result 252 states and 319 transitions. [2021-11-25 18:11:25,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-25 18:11:25,074 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.838709677419355) internal successors, (88), 29 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 18:11:25,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:11:25,076 INFO L225 Difference]: With dead ends: 252 [2021-11-25 18:11:25,076 INFO L226 Difference]: Without dead ends: 252 [2021-11-25 18:11:25,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 71 SyntacticMatches, 4 SemanticMatches, 77 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 2085 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=560, Invalid=5287, Unknown=13, NotChecked=302, Total=6162 [2021-11-25 18:11:25,079 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 142 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 238 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:11:25,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 717 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 693 Invalid, 0 Unknown, 238 Unchecked, 0.5s Time] [2021-11-25 18:11:25,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-11-25 18:11:25,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 238. [2021-11-25 18:11:25,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 188 states have (on average 1.3404255319148937) internal successors, (252), 212 states have internal predecessors, (252), 16 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (30), 17 states have call predecessors, (30), 16 states have call successors, (30) [2021-11-25 18:11:25,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 298 transitions. [2021-11-25 18:11:25,091 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 298 transitions. Word has length 49 [2021-11-25 18:11:25,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:11:25,091 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 298 transitions. [2021-11-25 18:11:25,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.838709677419355) internal successors, (88), 29 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 18:11:25,092 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 298 transitions. [2021-11-25 18:11:25,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-25 18:11:25,093 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:11:25,093 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 18:11:25,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 18:11:25,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:11:25,308 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting appendErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-25 18:11:25,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:11:25,308 INFO L85 PathProgramCache]: Analyzing trace with hash -486855848, now seen corresponding path program 1 times [2021-11-25 18:11:25,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:11:25,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253112932] [2021-11-25 18:11:25,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:11:25,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:11:25,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:11:25,857 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 18:11:25,857 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:11:25,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253112932] [2021-11-25 18:11:25,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253112932] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:11:25,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547114044] [2021-11-25 18:11:25,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:11:25,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:11:25,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:11:25,858 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:11:25,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 18:11:26,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:11:26,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-25 18:11:26,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:11:26,082 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 18:11:26,238 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:11:26,238 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 18:11:26,409 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 18:11:26,413 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 18:11:26,468 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:11:26,469 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 18:11:26,476 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 18:11:26,492 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:11:26,492 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 18:11:26,498 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 18:11:26,568 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:11:26,569 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 18:11:26,582 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:11:26,582 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 18:11:26,615 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 18:11:26,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:11:26,759 INFO L354 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2021-11-25 18:11:26,760 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 18:11:26,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:26,900 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 18:11:26,912 INFO L354 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2021-11-25 18:11:26,913 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 18:11:26,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 18:11:26,976 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 18:11:27,141 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 18:11:27,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 18:11:27,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 18:11:27,179 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 18:11:27,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:11:27,241 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 18:11:27,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:11:27,245 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 18:11:27,275 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 18:11:27,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:11:27,353 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2266 (Array Int Int))) (<= 0 (+ (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_2266) c_append_~head.base) (+ c_append_~head.offset 4)) 5))) (forall ((v_ArrVal_2267 (Array Int Int)) (v_ArrVal_2266 (Array Int Int))) (let ((.cse0 (+ c_append_~head.offset 4))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_2266) c_append_~head.base) .cse0) 9) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_2267) c_append_~head.base) .cse0)))))) is different from false [2021-11-25 18:11:28,135 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:11:28,136 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 18:11:28,143 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:11:28,143 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 18:11:28,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:11:28,155 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:11:28,155 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 18:11:28,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:11:28,175 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:11:28,176 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 18:11:28,201 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:11:28,202 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 18:11:28,213 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 18:11:28,224 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 18:11:30,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547114044] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:11:30,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1416713979] [2021-11-25 18:11:30,290 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2021-11-25 18:11:30,290 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:11:30,291 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:11:30,291 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:11:30,291 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:11:30,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:30,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:30,306 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 18:11:30,320 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 11 treesize of output 7 [2021-11-25 18:11:30,324 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 18:11:30,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:30,331 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 18:11:30,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:30,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 18:11:30,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:30,358 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 18:11:30,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:30,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:30,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:30,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:30,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:30,370 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 18:11:30,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:30,381 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 18:11:30,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:30,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:30,400 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 18:11:30,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:30,407 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 18:11:30,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:30,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:30,415 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 18:11:30,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:30,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:30,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:30,445 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 18:11:30,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:30,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:30,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:30,458 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 18:11:30,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:30,467 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 18:11:30,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:30,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:30,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:30,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:30,513 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:11:30,513 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 18:11:30,533 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 18:11:30,537 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 18:11:30,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:11:30,550 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 18:11:30,556 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 18:11:30,593 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 18:11:30,597 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 18:11:30,601 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 18:11:30,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:30,608 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 18:11:30,612 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 18:11:30,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:30,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 18:11:30,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:30,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:30,633 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-25 18:11:30,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 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 18:11:30,638 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 18:11:30,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:30,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:30,659 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-25 18:11:30,659 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 18:11:30,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:30,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:30,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:30,688 INFO L354 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2021-11-25 18:11:30,688 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 18:11:30,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:30,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:30,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:30,730 INFO L354 Elim1Store]: treesize reduction 56, result has 39.8 percent of original size [2021-11-25 18:11:30,730 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 18:11:30,740 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 18:11:30,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:30,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:30,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:30,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:30,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:30,771 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 18:11:31,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:31,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:31,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:31,008 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 18:11:31,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:31,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:31,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:31,015 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 18:11:31,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:31,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:31,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:31,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:31,057 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:11:31,057 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 18:11:31,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:31,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:31,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:31,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:31,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:31,092 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 18:11:31,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:31,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:31,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:31,099 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 18:11:31,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:31,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:31,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:31,347 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 18:11:32,989 INFO L354 Elim1Store]: treesize reduction 40, result has 29.8 percent of original size [2021-11-25 18:11:32,990 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 700 treesize of output 697 [2021-11-25 18:11:34,762 INFO L354 Elim1Store]: treesize reduction 40, result has 29.8 percent of original size [2021-11-25 18:11:34,763 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 700 treesize of output 697 [2021-11-25 18:11:37,256 INFO L354 Elim1Store]: treesize reduction 40, result has 29.8 percent of original size [2021-11-25 18:11:37,256 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 594 treesize of output 591 [2021-11-25 18:11:39,265 INFO L354 Elim1Store]: treesize reduction 40, result has 29.8 percent of original size [2021-11-25 18:11:39,266 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 594 treesize of output 591 [2021-11-25 18:11:42,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:42,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:42,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:42,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:42,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:11:42,403 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:11:42,403 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 18:11:42,419 INFO L197 IcfgInterpreter]: Interpreting procedure append with input of size 102 for LOIs [2021-11-25 18:11:42,838 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 18:11:42,843 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 18:11:42,848 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 11 treesize of output 7 [2021-11-25 18:11:42,860 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 18:11:42,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:42,867 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 18:11:42,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:42,874 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 18:11:42,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:42,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:42,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:42,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 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 18:11:42,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:42,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:42,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:42,897 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 30 treesize of output 32 [2021-11-25 18:11:42,904 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 18:11:42,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:42,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:42,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:42,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:42,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:42,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:42,923 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:11:42,923 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 18:11:42,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:42,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:42,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:42,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:42,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:42,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:42,936 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:11:42,937 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 18:11:42,943 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 18:11:42,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:42,964 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 18:11:42,969 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 18:11:42,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:42,975 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 18:11:42,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:42,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:42,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:42,992 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:11:42,992 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 18:11:42,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:43,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:43,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:43,003 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:11:43,003 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 18:11:43,008 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 18:11:43,020 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:11:51,508 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8603#(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 18:11:51,508 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:11:51,509 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:11:51,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 31 [2021-11-25 18:11:51,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323101814] [2021-11-25 18:11:51,509 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:11:51,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-25 18:11:51,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:11:51,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-25 18:11:51,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=3748, Unknown=3, NotChecked=124, Total=4160 [2021-11-25 18:11:51,511 INFO L87 Difference]: Start difference. First operand 238 states and 298 transitions. Second operand has 32 states, 31 states have (on average 2.838709677419355) internal successors, (88), 29 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 18:11:53,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:11:53,459 INFO L93 Difference]: Finished difference Result 275 states and 335 transitions. [2021-11-25 18:11:53,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-25 18:11:53,468 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.838709677419355) internal successors, (88), 29 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 18:11:53,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:11:53,470 INFO L225 Difference]: With dead ends: 275 [2021-11-25 18:11:53,470 INFO L226 Difference]: Without dead ends: 275 [2021-11-25 18:11:53,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1866 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=537, Invalid=5626, Unknown=3, NotChecked=154, Total=6320 [2021-11-25 18:11:53,473 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 261 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 1234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 412 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:11:53,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 599 Invalid, 1234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 787 Invalid, 0 Unknown, 412 Unchecked, 0.6s Time] [2021-11-25 18:11:53,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-11-25 18:11:53,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 244. [2021-11-25 18:11:53,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 195 states have (on average 1.323076923076923) internal successors, (258), 218 states have internal predecessors, (258), 16 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (30), 17 states have call predecessors, (30), 16 states have call successors, (30) [2021-11-25 18:11:53,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 304 transitions. [2021-11-25 18:11:53,485 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 304 transitions. Word has length 49 [2021-11-25 18:11:53,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:11:53,485 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 304 transitions. [2021-11-25 18:11:53,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.838709677419355) internal successors, (88), 29 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 18:11:53,486 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 304 transitions. [2021-11-25 18:11:53,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-25 18:11:53,487 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:11:53,487 INFO L514 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1] [2021-11-25 18:11:53,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 18:11:53,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:11:53,712 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting appendErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-25 18:11:53,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:11:53,713 INFO L85 PathProgramCache]: Analyzing trace with hash 118406711, now seen corresponding path program 1 times [2021-11-25 18:11:53,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:11:53,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563907888] [2021-11-25 18:11:53,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:11:53,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:11:53,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:11:53,768 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 18:11:53,769 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:11:53,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563907888] [2021-11-25 18:11:53,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563907888] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:11:53,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:11:53,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:11:53,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561423056] [2021-11-25 18:11:53,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:11:53,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:11:53,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:11:53,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:11:53,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:11:53,771 INFO L87 Difference]: Start difference. First operand 244 states and 304 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 18:11:53,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:11:53,809 INFO L93 Difference]: Finished difference Result 249 states and 308 transitions. [2021-11-25 18:11:53,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:11:53,810 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 49 [2021-11-25 18:11:53,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:11:53,813 INFO L225 Difference]: With dead ends: 249 [2021-11-25 18:11:53,813 INFO L226 Difference]: Without dead ends: 249 [2021-11-25 18:11:53,815 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 18:11:53,816 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 0 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:11:53,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 127 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:11:53,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-11-25 18:11:53,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2021-11-25 18:11:53,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 200 states have (on average 1.31) internal successors, (262), 223 states have internal predecessors, (262), 16 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (30), 17 states have call predecessors, (30), 16 states have call successors, (30) [2021-11-25 18:11:53,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 308 transitions. [2021-11-25 18:11:53,830 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 308 transitions. Word has length 49 [2021-11-25 18:11:53,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:11:53,831 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 308 transitions. [2021-11-25 18:11:53,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 18:11:53,831 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 308 transitions. [2021-11-25 18:11:53,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-25 18:11:53,832 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:11:53,832 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 18:11:53,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-25 18:11:53,833 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting appendErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-25 18:11:53,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:11:53,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1304273167, now seen corresponding path program 1 times [2021-11-25 18:11:53,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:11:53,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309613395] [2021-11-25 18:11:53,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:11:53,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:11:53,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:11:54,206 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 18:11:54,207 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:11:54,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309613395] [2021-11-25 18:11:54,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309613395] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:11:54,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054143160] [2021-11-25 18:11:54,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:11:54,208 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:11:54,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:11:54,208 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:11:54,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 18:11:54,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:11:54,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-25 18:11:54,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:11:54,412 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 18:11:54,546 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:11:54,546 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 18:11:54,682 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 18:11:54,735 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-25 18:11:54,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 18:11:54,780 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:11:54,781 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 18:11:54,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:54,790 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 18:11:54,845 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:11:54,845 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 18:11:54,926 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-25 18:11:54,926 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 18:11:55,033 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:11:55,033 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 18:11:55,070 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 36 treesize of output 32 [2021-11-25 18:11:55,120 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 18:11:55,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:11:55,137 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2625 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_2625) c_append_~head.base) c_append_~head.offset) 0))) is different from false [2021-11-25 18:11:55,146 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_append_~node~0.base_72 Int) (v_ArrVal_2625 (Array Int Int))) (or (not (= (select |c_#valid| v_append_~node~0.base_72) 0)) (not (= (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_72 v_ArrVal_2625) |c_append_#in~head.base|) |c_append_#in~head.offset|) 0)))) is different from false [2021-11-25 18:11:55,156 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_append_~node~0.base_72 Int) (v_ArrVal_2625 (Array Int Int))) (or (not (= (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_72 v_ArrVal_2625) |c_ULTIMATE.start_main_~list2~0#1.base|) |c_ULTIMATE.start_main_~list2~0#1.offset|) 0)) (not (= (select |c_#valid| v_append_~node~0.base_72) 0)))) is different from false [2021-11-25 18:11:55,247 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-11-25 18:11:55,248 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 18:11:55,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:11:55,253 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-25 18:11:55,253 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 18:11:55,256 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 18:11:55,262 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 18:11:55,262 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 18:11:55,479 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-11-25 18:11:55,479 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 18:11:55,524 INFO L354 Elim1Store]: treesize reduction 10, result has 71.4 percent of original size [2021-11-25 18:11:55,524 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 141 treesize of output 147 [2021-11-25 18:11:55,529 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 114 treesize of output 110 [2021-11-25 18:11:55,533 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 110 treesize of output 102 [2021-11-25 18:11:55,809 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 18:11:55,809 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 18:11:56,205 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 18:11:56,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054143160] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:11:56,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [35594561] [2021-11-25 18:11:56,207 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2021-11-25 18:11:56,207 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:11:56,207 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:11:56,207 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:11:56,207 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:11:56,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,219 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 18:11:56,233 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 18:11:56,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,238 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 18:11:56,243 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 18:11:56,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,256 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 18:11:56,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,267 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 18:11:56,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,275 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 18:11:56,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,281 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 18:11:56,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,296 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 18:11:56,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,305 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 18:11:56,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,314 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 18:11:56,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,333 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 18:11:56,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 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 18:11:56,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 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 18:11:56,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,416 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:11:56,417 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 18:11:56,439 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 18:11:56,443 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 18:11:56,449 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 18:11:56,453 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 18:11:56,457 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 15 treesize of output 1 [2021-11-25 18:11:56,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 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 18:11:56,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,489 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 18:11:56,509 INFO L354 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2021-11-25 18:11:56,510 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 18:11:56,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,524 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 18:11:56,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,530 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 30 treesize of output 23 [2021-11-25 18:11:56,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,536 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 18:11:56,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,564 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-25 18:11:56,565 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 18:11:56,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,572 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 18:11:56,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,590 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-25 18:11:56,590 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 18:11:56,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,623 INFO L354 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2021-11-25 18:11:56,623 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 18:11:56,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,657 INFO L354 Elim1Store]: treesize reduction 66, result has 29.0 percent of original size [2021-11-25 18:11:56,657 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 18:11:56,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,668 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 18:11:56,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,702 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 18:11:56,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,711 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 18:11:56,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,721 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 18:11:56,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:11:56,775 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:11:56,775 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 18:11:56,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,811 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 18:11:56,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,828 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 18:11:56,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:56,837 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 18:11:57,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:57,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:57,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:57,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:11:57,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:11:57,357 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:11:57,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 18:11:57,372 INFO L197 IcfgInterpreter]: Interpreting procedure append with input of size 102 for LOIs [2021-11-25 18:11:59,721 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:12:17,987 WARN L227 SmtUtils]: Spent 17.15s on a formula simplification. DAG size of input: 286 DAG size of output: 148 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:13:05,648 WARN L227 SmtUtils]: Spent 6.00s 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 18:13:20,678 WARN L227 SmtUtils]: Spent 8.44s on a formula simplification. DAG size of input: 245 DAG size of output: 120 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:13:48,160 WARN L227 SmtUtils]: Spent 19.38s on a formula simplification. DAG size of input: 275 DAG size of output: 137 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:14:09,134 WARN L227 SmtUtils]: Spent 19.51s on a formula simplification. DAG size of input: 283 DAG size of output: 145 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:14:09,135 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10016#(and (= |append_#in~head.offset| append_~head.offset) (not (= append_~node~0.base 0)) (= append_~node~0.offset 0) (<= 0 (+ 128 |append_#in~input|)) (= (select (select |#memory_$Pointer$.offset| append_~head.base) (+ append_~head.offset 4)) |append_#t~mem8.offset|) (< append_~node~0.base |#StackHeapBarrier|) (<= (+ 8 append_~head.offset) (select |#length| append_~head.base)) (<= |#NULL.offset| 0) (<= |append_#in~head.offset| 0) (<= 0 append_~head.offset) (not (= (select |#valid| |append_#t~mem8.base|) 1)) (= append_~head.base |append_#in~head.base|) (= (select |#valid| append_~head.base) 1) (= append_~input |append_#in~input|) (<= |append_#in~input| 127) (<= 0 |#NULL.offset|) (= (select (select |#memory_$Pointer$.base| append_~head.base) (+ append_~head.offset 4)) |append_#t~mem8.base|) (<= 0 |#StackHeapBarrier|) (or (and (= 0 (select |old(#valid)| append_~node~0.base)) (exists ((v_DerPreprocessor_74 Int)) (and (= (select (select (store |old(#memory_$Pointer$.base)| append_~node~0.base (store (select |old(#memory_$Pointer$.base)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_74)) append_~head.base) append_~head.offset) 0) (not (= (select (select (store |old(#memory_$Pointer$.base)| append_~node~0.base (store (select |old(#memory_$Pointer$.base)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_74)) append_~head.base) (+ append_~head.offset 4)) 0)) (= |#memory_$Pointer$.base| (store |old(#memory_$Pointer$.base)| append_~node~0.base (store (store (store (select |old(#memory_$Pointer$.base)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_74) (+ append_~node~0.offset 1) (select (select (store |old(#memory_$Pointer$.base)| append_~node~0.base (store (select |old(#memory_$Pointer$.base)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_74)) append_~head.base) (+ append_~head.offset 4))) (+ 5 append_~node~0.offset) 0))))) (exists ((v_DerPreprocessor_70 Int)) (and (= |#memory_$Pointer$.offset| (store |old(#memory_$Pointer$.offset)| append_~node~0.base (store (store (store (select |old(#memory_$Pointer$.offset)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_70) (+ append_~node~0.offset 1) (select (select (store |old(#memory_$Pointer$.offset)| append_~node~0.base (store (select |old(#memory_$Pointer$.offset)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_70)) append_~head.base) (+ append_~head.offset 4))) (+ 5 append_~node~0.offset) 0))) (= (select (select (store |old(#memory_$Pointer$.offset)| append_~node~0.base (store (select |old(#memory_$Pointer$.offset)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_70)) append_~head.base) append_~head.offset) 0))) (= (store |old(#length)| append_~node~0.base 9) |#length|) (exists ((v_DerPreprocessor_79 Int)) (= |#memory_int| (store |old(#memory_int)| append_~node~0.base (store (store (store (select |old(#memory_int)| append_~node~0.base) append_~node~0.offset append_~input) (+ append_~node~0.offset 1) v_DerPreprocessor_79) (+ 5 append_~node~0.offset) (select (select |#memory_int| append_~node~0.base) (+ 5 append_~node~0.offset)))))) (= |#valid| (store |old(#valid)| append_~node~0.base 1)) (= |#NULL.base| 0)) (and (= 0 (select |old(#valid)| append_~node~0.base)) (exists ((v_DerPreprocessor_75 Int)) (and (= (store |old(#memory_$Pointer$.base)| append_~node~0.base (store (store (store (select |old(#memory_$Pointer$.base)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_75) (+ append_~node~0.offset 1) (select (select (store |old(#memory_$Pointer$.base)| append_~node~0.base (store (select |old(#memory_$Pointer$.base)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_75)) append_~head.base) (+ append_~head.offset 4))) (+ 5 append_~node~0.offset) 0)) |#memory_$Pointer$.base|) (= (select (select (store |old(#memory_$Pointer$.base)| append_~node~0.base (store (select |old(#memory_$Pointer$.base)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_75)) append_~head.base) append_~head.offset) 0))) (exists ((v_DerPreprocessor_77 Int)) (= |#memory_int| (store |old(#memory_int)| append_~node~0.base (store (store (store (select |old(#memory_int)| append_~node~0.base) append_~node~0.offset append_~input) (+ append_~node~0.offset 1) v_DerPreprocessor_77) (+ 5 append_~node~0.offset) (select (select |#memory_int| append_~node~0.base) (+ 5 append_~node~0.offset)))))) (= (store |old(#length)| append_~node~0.base 9) |#length|) (exists ((v_DerPreprocessor_71 Int)) (and (= (select (select (store |old(#memory_$Pointer$.offset)| append_~node~0.base (store (select |old(#memory_$Pointer$.offset)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_71)) append_~head.base) append_~head.offset) 0) (not (= (select (select (store |old(#memory_$Pointer$.offset)| append_~node~0.base (store (select |old(#memory_$Pointer$.offset)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_71)) append_~head.base) (+ append_~head.offset 4)) 0)) (= |#memory_$Pointer$.offset| (store |old(#memory_$Pointer$.offset)| append_~node~0.base (store (store (store (select |old(#memory_$Pointer$.offset)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_71) (+ append_~node~0.offset 1) (select (select (store |old(#memory_$Pointer$.offset)| append_~node~0.base (store (select |old(#memory_$Pointer$.offset)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_71)) append_~head.base) (+ append_~head.offset 4))) (+ 5 append_~node~0.offset) 0))))) (= |#valid| (store |old(#valid)| append_~node~0.base 1)) (= |#NULL.base| 0))))' at error location [2021-11-25 18:14:09,135 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:14:09,136 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:14:09,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 15] total 41 [2021-11-25 18:14:09,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934370372] [2021-11-25 18:14:09,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:14:09,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-25 18:14:09,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:14:09,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-25 18:14:09,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=3771, Unknown=29, NotChecked=390, Total=4692 [2021-11-25 18:14:09,138 INFO L87 Difference]: Start difference. First operand 249 states and 308 transitions. Second operand has 41 states, 41 states have (on average 2.7804878048780486) internal successors, (114), 36 states have internal predecessors, (114), 7 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-25 18:14:11,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:14:11,104 INFO L93 Difference]: Finished difference Result 393 states and 449 transitions. [2021-11-25 18:14:11,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-25 18:14:11,105 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.7804878048780486) internal successors, (114), 36 states have internal predecessors, (114), 7 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 50 [2021-11-25 18:14:11,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:14:11,107 INFO L225 Difference]: With dead ends: 393 [2021-11-25 18:14:11,108 INFO L226 Difference]: Without dead ends: 393 [2021-11-25 18:14:11,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 101 SyntacticMatches, 11 SemanticMatches, 86 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 2753 ImplicationChecksByTransitivity, 131.6s TimeCoverageRelationStatistics Valid=939, Invalid=6168, Unknown=45, NotChecked=504, Total=7656 [2021-11-25 18:14:11,109 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 414 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 727 SdHoareTripleChecker+Invalid, 1213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 372 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:14:11,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [414 Valid, 727 Invalid, 1213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 754 Invalid, 0 Unknown, 372 Unchecked, 0.5s Time] [2021-11-25 18:14:11,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-11-25 18:14:11,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 277. [2021-11-25 18:14:11,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 225 states have (on average 1.28) internal successors, (288), 248 states have internal predecessors, (288), 17 states have call successors, (17), 10 states have call predecessors, (17), 10 states have return successors, (26), 18 states have call predecessors, (26), 17 states have call successors, (26) [2021-11-25 18:14:11,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 331 transitions. [2021-11-25 18:14:11,122 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 331 transitions. Word has length 50 [2021-11-25 18:14:11,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:14:11,123 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 331 transitions. [2021-11-25 18:14:11,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.7804878048780486) internal successors, (114), 36 states have internal predecessors, (114), 7 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-25 18:14:11,123 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 331 transitions. [2021-11-25 18:14:11,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-25 18:14:11,124 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:14:11,124 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:14:11,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-25 18:14:11,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:14:11,348 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting appendErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-25 18:14:11,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:14:11,349 INFO L85 PathProgramCache]: Analyzing trace with hash -923617285, now seen corresponding path program 2 times [2021-11-25 18:14:11,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:14:11,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926038374] [2021-11-25 18:14:11,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:14:11,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:14:11,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:14:11,830 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:14:11,830 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:14:11,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926038374] [2021-11-25 18:14:11,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926038374] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:14:11,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226002409] [2021-11-25 18:14:11,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:14:11,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:14:11,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:14:11,832 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:14:11,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 18:14:12,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-25 18:14:12,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:14:12,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-25 18:14:12,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:14:12,134 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 18:14:12,170 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:14:12,170 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 18:14:12,303 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 18:14:12,349 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-25 18:14:12,349 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 18:14:12,394 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:14:12,395 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 18:14:12,401 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-25 18:14:12,401 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 18:14:12,459 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:14:12,460 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 18:14:12,546 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-25 18:14:12,546 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 18:14:20,542 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2869 (Array Int Int)) (append_~node~0.base Int)) (and (= 0 (select |c_old(#valid)| append_~node~0.base)) (= (select (select (store |c_old(#memory_$Pointer$.base)| append_~node~0.base v_ArrVal_2869) |c_append_#in~head.base|) |c_append_#in~head.offset|) 0))) is different from true [2021-11-25 18:14:20,618 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2021-11-25 18:14:20,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:14:20,708 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_append_~node~0.base_84 Int) (v_ArrVal_2872 (Array Int Int))) (or (not (= (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_84 v_ArrVal_2872) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) 0)) (not (= (select |c_#valid| v_append_~node~0.base_84) 0)))) is different from false [2021-11-25 18:14:20,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226002409] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:14:20,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1701417311] [2021-11-25 18:14:20,711 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2021-11-25 18:14:20,711 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:14:20,711 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:14:20,711 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:14:20,711 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:14:20,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:20,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:20,722 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 18:14:20,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:20,736 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 18:14:20,741 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 18:14:20,747 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 18:14:20,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:20,760 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 18:14:20,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:20,766 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 18:14:20,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:20,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:20,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:20,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:20,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:20,776 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 18:14:20,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:20,785 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 18:14:20,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:20,800 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 18:14:20,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:20,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:20,808 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 18:14:20,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:20,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:20,835 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 18:14:20,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:20,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:20,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:20,854 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 18:14:20,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:20,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:20,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:20,863 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 18:14:20,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:20,872 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 18:14:20,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:20,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:20,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:20,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:20,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:14:20,922 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:14:20,922 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 18:14:20,938 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 18:14:20,942 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 18:14:20,949 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 18:14:20,953 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 18:14:20,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:14:20,983 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 18:14:20,987 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 18:14:20,992 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 18:14:21,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:21,002 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 18:14:21,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:21,009 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 18:14:21,015 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 18:14:21,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:21,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:21,033 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-25 18:14:21,033 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 18:14:21,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:21,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:21,055 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-25 18:14:21,055 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 18:14:21,062 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 18:14:21,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:21,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:21,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:21,105 INFO L354 Elim1Store]: treesize reduction 56, result has 39.8 percent of original size [2021-11-25 18:14:21,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 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 18:14:21,115 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 18:14:21,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:21,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:21,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:21,141 INFO L354 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2021-11-25 18:14:21,141 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 18:14:21,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:21,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:21,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:21,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:21,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:21,174 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 18:14:21,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:21,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:21,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:21,182 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 18:14:21,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:21,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:21,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:21,425 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 18:14:21,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:21,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:21,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:21,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:21,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:14:21,468 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:14:21,469 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 18:14:21,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:21,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:21,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:21,508 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 18:14:21,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:21,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:21,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:21,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:21,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:21,519 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 18:14:21,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:21,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:21,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:21,528 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 18:14:25,625 INFO L197 IcfgInterpreter]: Interpreting procedure append with input of size 16 for LOIs [2021-11-25 18:14:25,632 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 18:14:25,638 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 18:14:25,647 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 18:14:25,651 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 18:14:25,658 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 18:14:25,705 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 18:14:25,710 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 18:14:25,714 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 18:14:25,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:25,724 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 18:14:25,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:25,731 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 18:14:25,749 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 18:14:25,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:25,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:25,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:25,763 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 30 treesize of output 32 [2021-11-25 18:14:25,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:25,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:25,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:25,774 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 18:14:25,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:14:25,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:25,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:25,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:25,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:25,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:25,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:25,800 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:14:25,801 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 18:14:25,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:14:25,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:25,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:25,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:25,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:25,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:25,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:25,819 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:14:25,820 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 18:14:25,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:25,843 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 18:14:25,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:25,850 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 18:14:25,855 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 18:14:25,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:25,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:25,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:25,873 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:14:25,873 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 18:14:25,878 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 18:14:25,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:25,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:25,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:25,917 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:14:25,918 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 18:14:25,930 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:14:28,860 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10990#(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 18:14:28,861 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:14:28,861 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:14:28,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 30 [2021-11-25 18:14:28,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878352676] [2021-11-25 18:14:28,861 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:14:28,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-25 18:14:28,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:14:28,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-25 18:14:28,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=2724, Unknown=27, NotChecked=214, Total=3192 [2021-11-25 18:14:28,863 INFO L87 Difference]: Start difference. First operand 277 states and 331 transitions. Second operand has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 28 states have internal predecessors, (76), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-25 18:14:30,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:14:30,276 INFO L93 Difference]: Finished difference Result 283 states and 330 transitions. [2021-11-25 18:14:30,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-25 18:14:30,276 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 28 states have internal predecessors, (76), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 50 [2021-11-25 18:14:30,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:14:30,278 INFO L225 Difference]: With dead ends: 283 [2021-11-25 18:14:30,278 INFO L226 Difference]: Without dead ends: 283 [2021-11-25 18:14:30,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 79 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1517 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=327, Invalid=3930, Unknown=41, NotChecked=258, Total=4556 [2021-11-25 18:14:30,280 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 61 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 759 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 230 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:14:30,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 759 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 618 Invalid, 0 Unknown, 230 Unchecked, 0.4s Time] [2021-11-25 18:14:30,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-11-25 18:14:30,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 257. [2021-11-25 18:14:30,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 207 states have (on average 1.2801932367149758) internal successors, (265), 230 states have internal predecessors, (265), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (23), 17 states have call predecessors, (23), 16 states have call successors, (23) [2021-11-25 18:14:30,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 304 transitions. [2021-11-25 18:14:30,291 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 304 transitions. Word has length 50 [2021-11-25 18:14:30,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:14:30,291 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 304 transitions. [2021-11-25 18:14:30,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 28 states have internal predecessors, (76), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-25 18:14:30,292 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 304 transitions. [2021-11-25 18:14:30,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-25 18:14:30,293 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:14:30,293 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-25 18:14:30,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-25 18:14:30,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-25 18:14:30,497 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting appendErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-25 18:14:30,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:14:30,497 INFO L85 PathProgramCache]: Analyzing trace with hash -362511627, now seen corresponding path program 1 times [2021-11-25 18:14:30,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:14:30,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625042046] [2021-11-25 18:14:30,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:14:30,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:14:30,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:14:30,800 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 18:14:30,800 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:14:30,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625042046] [2021-11-25 18:14:30,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625042046] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:14:30,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784075261] [2021-11-25 18:14:30,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:14:30,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:14:30,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:14:30,804 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:14:30,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-25 18:14:31,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:14:31,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-25 18:14:31,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:14:31,157 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 18:14:31,303 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 18:14:31,487 INFO L354 Elim1Store]: treesize reduction 68, result has 31.3 percent of original size [2021-11-25 18:14:31,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 45 [2021-11-25 18:14:31,558 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 28 treesize of output 28 [2021-11-25 18:14:31,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2021-11-25 18:14:31,673 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 28 treesize of output 28 [2021-11-25 18:14:31,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:14:31,719 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 21 treesize of output 9 [2021-11-25 18:14:31,734 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 18:14:31,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:14:31,961 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:14:31,961 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 30 treesize of output 31 [2021-11-25 18:14:31,970 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-11-25 18:14:31,970 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 84 treesize of output 57 [2021-11-25 18:14:32,009 INFO L354 Elim1Store]: treesize reduction 10, result has 83.6 percent of original size [2021-11-25 18:14:32,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 192 treesize of output 228 [2021-11-25 18:14:32,019 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 37 treesize of output 25 [2021-11-25 18:14:32,258 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:14:32,258 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 27 treesize of output 28 [2021-11-25 18:14:32,266 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:14:32,267 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 46 treesize of output 49 [2021-11-25 18:14:32,271 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 16 treesize of output 12 [2021-11-25 18:14:42,407 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 18:14:42,407 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 86 treesize of output 1 [2021-11-25 18:14:42,440 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 18:14:42,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784075261] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:14:42,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [832743020] [2021-11-25 18:14:42,445 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2021-11-25 18:14:42,446 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:14:42,446 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:14:42,447 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:14:42,447 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:14:42,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:42,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:42,460 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 18:14:42,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:42,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 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 18:14:42,479 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 18:14:42,483 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 18:14:42,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:42,499 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 18:14:42,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:42,504 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 18:14:42,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:42,512 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 18:14:42,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:42,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:42,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:42,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:42,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:42,523 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 18:14:42,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:42,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:42,541 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 18:14:42,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:42,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:42,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 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 18:14:42,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:42,556 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 18:14:42,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:42,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:42,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:42,578 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 18:14:42,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:42,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:42,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:42,587 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 18:14:42,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:42,597 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 18:14:42,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:42,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:42,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:42,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:42,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:14:42,645 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:14:42,646 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 18:14:42,666 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 18:14:42,670 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 18:14:42,679 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 18:14:42,683 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 18:14:42,688 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 18:14:42,719 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 18:14:42,723 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 18:14:42,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:14:42,732 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 18:14:42,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:42,737 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 18:14:42,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:42,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 18:14:42,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:42,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:42,767 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-25 18:14:42,767 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 18:14:42,773 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 18:14:42,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:42,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:42,791 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-25 18:14:42,791 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 18:14:42,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:42,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:42,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:42,823 INFO L354 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2021-11-25 18:14:42,823 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 18:14:42,829 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 18:14:42,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:42,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:42,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:42,872 INFO L354 Elim1Store]: treesize reduction 56, result has 39.8 percent of original size [2021-11-25 18:14:42,872 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 18:14:42,887 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 18:14:42,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:42,893 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 18:14:42,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:42,900 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 18:14:42,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:42,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:42,923 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-25 18:14:42,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 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 18:14:42,931 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 18:14:42,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:42,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:42,954 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-25 18:14:42,955 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 18:14:42,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:42,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:43,075 INFO L354 Elim1Store]: treesize reduction 110, result has 39.6 percent of original size [2021-11-25 18:14:43,076 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 18:14:43,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:43,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:43,146 INFO L354 Elim1Store]: treesize reduction 86, result has 35.8 percent of original size [2021-11-25 18:14:43,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 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 18:14:43,155 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 18:14:43,222 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 18:14:43,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:43,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:43,327 INFO L354 Elim1Store]: treesize reduction 206, result has 36.0 percent of original size [2021-11-25 18:14:43,328 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 18:14:43,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:43,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:43,415 INFO L354 Elim1Store]: treesize reduction 148, result has 29.5 percent of original size [2021-11-25 18:14:43,415 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 414 [2021-11-25 18:14:53,191 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2021-11-25 18:14:53,202 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-25 18:14:53,216 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-25 18:14:53,469 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-25 18:14:53,475 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-25 18:14:53,479 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2021-11-25 18:14:53,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:53,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:53,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:53,873 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 18:14:53,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:53,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:53,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:53,884 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 18:14:53,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:53,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:53,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:53,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:53,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:53,896 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 18:14:53,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:53,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:53,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:53,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:53,948 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:14:53,949 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 18:14:53,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:53,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:53,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:53,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:53,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:53,993 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 18:14:54,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:54,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:54,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:54,003 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 18:14:54,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:54,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:54,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:54,012 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 18:14:54,179 INFO L354 Elim1Store]: treesize reduction 144, result has 20.4 percent of original size [2021-11-25 18:14:54,180 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 18:14:54,247 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 18:14:54,323 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:14:54,436 INFO L354 Elim1Store]: treesize reduction 144, result has 20.4 percent of original size [2021-11-25 18:14:54,436 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 18:14:54,505 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 18:14:54,572 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:14:54,774 INFO L354 Elim1Store]: treesize reduction 144, result has 20.4 percent of original size [2021-11-25 18:14:54,774 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 18:14:54,851 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 18:14:54,922 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:14:55,036 INFO L354 Elim1Store]: treesize reduction 144, result has 20.4 percent of original size [2021-11-25 18:14:55,036 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 18:14:55,097 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 18:14:55,167 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:14:55,279 INFO L354 Elim1Store]: treesize reduction 144, result has 20.4 percent of original size [2021-11-25 18:14:55,280 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 18:14:55,339 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 18:14:55,382 INFO L197 IcfgInterpreter]: Interpreting procedure append with input of size 113 for LOIs [2021-11-25 18:14:55,821 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 18:14:55,828 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 18:14:55,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:14:55,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:55,848 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 18:14:55,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:55,855 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 18:14:55,862 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 18:14:55,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:55,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:55,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:55,883 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 18:14:55,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:55,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:55,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:55,895 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 18:14:55,904 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 18:14:55,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:55,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:55,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:55,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:55,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:55,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:55,930 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:14:55,931 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 18:14:55,938 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 18:14:55,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:55,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:55,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:55,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:55,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:55,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:55,955 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:14:55,956 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 18:14:55,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:55,983 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 19 treesize of output 19 [2021-11-25 18:14:55,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:55,992 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 18:14:55,998 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 18:14:56,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:56,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:56,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:56,022 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:14:56,023 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 1 case distinctions, treesize of input 29 treesize of output 31 [2021-11-25 18:14:56,030 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 18:14:56,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:56,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:56,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:56,043 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:14:56,043 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 18:14:56,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:56,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:56,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:56,145 INFO L354 Elim1Store]: treesize reduction 108, result has 34.9 percent of original size [2021-11-25 18:14:56,146 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 18:14:56,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:56,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:56,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:56,222 INFO L354 Elim1Store]: treesize reduction 94, result has 39.0 percent of original size [2021-11-25 18:14:56,223 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 18:14:56,233 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 18:14:56,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:56,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:56,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:56,336 INFO L354 Elim1Store]: treesize reduction 124, result has 22.5 percent of original size [2021-11-25 18:14:56,337 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 18:14:56,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:56,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:56,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:56,389 INFO L354 Elim1Store]: treesize reduction 110, result has 23.6 percent of original size [2021-11-25 18:14:56,389 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 18:14:56,443 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 18:14:56,478 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:15:00,116 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11902#(and (= (select (select |#memory_$Pointer$.base| append_~node~0.base) (+ 5 append_~node~0.offset)) 0) (<= 0 |#NULL.base|) (<= 0 (+ append_~input 128)) (= append_~node~0.offset 0) (<= 0 (+ 128 |append_#in~input|)) (= (select (select |#memory_$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$.base| append_~head.base) (+ append_~head.offset 4))) (<= (+ 8 append_~head.offset) (select |#length| append_~head.base)) (<= append_~head.offset 0) (<= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.offset| append_~node~0.base) (+ 5 append_~node~0.offset)) 0) (<= 0 |append_#in~head.offset|) (<= |append_#in~head.offset| 0) (<= 0 append_~head.offset) (not (= (select |#valid| |append_#t~mem8.base|) 1)) (<= |#NULL.base| 0) (= (select (select |#memory_$Pointer$.offset| append_~node~0.base) (+ append_~node~0.offset 1)) (select (select |#memory_$Pointer$.offset| append_~head.base) (+ append_~head.offset 4))) (= (select |#valid| append_~head.base) 1) (= (select |#valid| append_~node~0.base) 1) (<= append_~input 127) (<= |append_#in~input| 127) (<= 0 |#NULL.offset|) (= (select (select |#memory_$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)))' at error location [2021-11-25 18:15:00,117 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:15:00,117 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:15:00,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2021-11-25 18:15:00,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117579061] [2021-11-25 18:15:00,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:15:00,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-25 18:15:00,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:15:00,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-25 18:15:00,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=2236, Unknown=7, NotChecked=0, Total=2450 [2021-11-25 18:15:00,122 INFO L87 Difference]: Start difference. First operand 257 states and 304 transitions. Second operand has 28 states, 27 states have (on average 3.7037037037037037) internal successors, (100), 25 states have internal predecessors, (100), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 18:15:00,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:15:00,830 INFO L93 Difference]: Finished difference Result 368 states and 456 transitions. [2021-11-25 18:15:00,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 18:15:00,830 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.7037037037037037) internal successors, (100), 25 states have internal predecessors, (100), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 2 states have call successors, (5) Word has length 50 [2021-11-25 18:15:00,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:15:00,833 INFO L225 Difference]: With dead ends: 368 [2021-11-25 18:15:00,833 INFO L226 Difference]: Without dead ends: 368 [2021-11-25 18:15:00,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 115 SyntacticMatches, 7 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1096 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=296, Invalid=2777, Unknown=7, NotChecked=0, Total=3080 [2021-11-25 18:15:00,835 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 170 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 439 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:15:00,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 721 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 245 Invalid, 0 Unknown, 439 Unchecked, 0.2s Time] [2021-11-25 18:15:00,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-11-25 18:15:00,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 271. [2021-11-25 18:15:00,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 220 states have (on average 1.2772727272727273) internal successors, (281), 242 states have internal predecessors, (281), 17 states have call successors, (17), 10 states have call predecessors, (17), 9 states have return successors, (25), 18 states have call predecessors, (25), 17 states have call successors, (25) [2021-11-25 18:15:00,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 323 transitions. [2021-11-25 18:15:00,865 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 323 transitions. Word has length 50 [2021-11-25 18:15:00,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:15:00,865 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 323 transitions. [2021-11-25 18:15:00,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.7037037037037037) internal successors, (100), 25 states have internal predecessors, (100), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 18:15:00,867 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 323 transitions. [2021-11-25 18:15:00,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-25 18:15:00,868 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:15:00,868 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-25 18:15:00,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-25 18:15:01,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-25 18:15:01,084 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting appendErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-25 18:15:01,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:15:01,085 INFO L85 PathProgramCache]: Analyzing trace with hash -362511626, now seen corresponding path program 1 times [2021-11-25 18:15:01,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:15:01,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259635789] [2021-11-25 18:15:01,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:15:01,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:15:01,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:15:01,462 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 18:15:01,462 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:15:01,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259635789] [2021-11-25 18:15:01,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259635789] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:15:01,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55369899] [2021-11-25 18:15:01,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:15:01,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:15:01,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:15:01,463 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:15:01,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-25 18:15:01,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:15:01,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 86 conjunts are in the unsatisfiable core [2021-11-25 18:15:01,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:15:01,721 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 18:15:01,725 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 18:15:01,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:01,759 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 18:15:01,772 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:15:01,772 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 18:15:02,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:02,008 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 18:15:02,014 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:15:02,014 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 18:15:02,374 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 18:15:02,378 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 18:15:02,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:02,478 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 18 treesize of output 20 [2021-11-25 18:15:02,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:02,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:15:02,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 29 treesize of output 23 [2021-11-25 18:15:02,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:02,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:02,685 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-25 18:15:02,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 38 treesize of output 41 [2021-11-25 18:15:02,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:02,699 INFO L354 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2021-11-25 18:15:02,699 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 18:15:02,779 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 36 treesize of output 36 [2021-11-25 18:15:02,786 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 18:15:02,988 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 36 treesize of output 36 [2021-11-25 18:15:02,993 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 18:15:03,031 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 36 treesize of output 36 [2021-11-25 18:15:03,036 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 18:15:03,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:15:03,112 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 29 treesize of output 17 [2021-11-25 18:15:03,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:15:03,117 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 32 treesize of output 14 [2021-11-25 18:15:03,159 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 18:15:03,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:15:03,240 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3350 (Array Int Int)) (v_ArrVal_3351 (Array Int Int))) (let ((.cse0 (+ c_append_~head.offset 4))) (<= (+ 9 (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_3350) c_append_~head.base) .cse0)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_3351) c_append_~head.base) .cse0))))) (forall ((v_ArrVal_3350 (Array Int Int))) (<= 0 (+ 5 (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_3350) c_append_~head.base) (+ c_append_~head.offset 4)))))) is different from false [2021-11-25 18:15:04,220 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:15:04,220 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 76 treesize of output 77 [2021-11-25 18:15:04,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:15:04,245 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-11-25 18:15:04,245 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 74 treesize of output 65 [2021-11-25 18:15:04,254 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:15:04,254 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 65 treesize of output 55 [2021-11-25 18:15:04,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:15:04,264 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-25 18:15:04,264 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 49 treesize of output 31 [2021-11-25 18:15:04,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55369899] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:15:04,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2010242647] [2021-11-25 18:15:04,542 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2021-11-25 18:15:04,542 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:15:04,543 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:15:04,543 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:15:04,543 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:15:04,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:04,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:04,558 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 18:15:04,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:04,573 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 18:15:04,578 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 18:15:04,585 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 18:15:04,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:04,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:04,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:04,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:04,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:04,602 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 18:15:04,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:04,609 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 18:15:04,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:04,615 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 18:15:04,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:04,623 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 21 treesize of output 20 [2021-11-25 18:15:04,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:04,638 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 18:15:04,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:04,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:04,646 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 18:15:04,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:04,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:04,656 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 18:15:04,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:04,673 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 18:15:04,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:04,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:04,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:04,683 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 18:15:04,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:04,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:04,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:04,694 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 18:15:04,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:04,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:04,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:04,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:04,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:15:04,741 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:15:04,742 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 18:15:04,763 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 18:15:04,767 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 18:15:04,775 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 18:15:04,778 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 18:15:04,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:15:04,818 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 18:15:04,821 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 18:15:04,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:15:04,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:04,831 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 18:15:04,836 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 18:15:04,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:04,841 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 18:15:04,847 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 18:15:04,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:04,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:04,867 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-25 18:15:04,867 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 18:15:04,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:04,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:04,885 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-25 18:15:04,885 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 18:15:04,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:04,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:04,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:04,920 INFO L354 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2021-11-25 18:15:04,921 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 39 treesize of output 44 [2021-11-25 18:15:04,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:04,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:04,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:04,962 INFO L354 Elim1Store]: treesize reduction 56, result has 39.8 percent of original size [2021-11-25 18:15:04,963 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 18:15:04,973 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 19 treesize of output 1 [2021-11-25 18:15:04,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:04,984 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 18:15:04,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:04,989 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 18:15:04,994 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 18:15:05,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:05,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:05,017 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-25 18:15:05,017 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 18:15:05,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:05,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:05,040 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-25 18:15:05,041 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 18:15:05,046 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 19 treesize of output 1 [2021-11-25 18:15:05,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:05,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:05,134 INFO L354 Elim1Store]: treesize reduction 110, result has 39.6 percent of original size [2021-11-25 18:15:05,134 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 18:15:05,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:05,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:05,192 INFO L354 Elim1Store]: treesize reduction 86, result has 35.8 percent of original size [2021-11-25 18:15:05,193 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 18:15:05,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:15:05,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:05,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:05,365 INFO L354 Elim1Store]: treesize reduction 184, result has 28.7 percent of original size [2021-11-25 18:15:05,365 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 482 treesize of output 433 [2021-11-25 18:15:05,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:05,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:05,466 INFO L354 Elim1Store]: treesize reduction 132, result has 37.1 percent of original size [2021-11-25 18:15:05,467 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 18:15:14,695 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 18:15:14,792 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-25 18:15:14,809 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-25 18:15:14,928 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-25 18:15:14,945 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-25 18:15:15,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:15,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:15,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:15,093 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 18:15:15,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:15,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:15,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:15,101 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 18:15:15,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:15,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:15,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:15,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:15,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:15,112 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 18:15:15,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:15,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:15,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:15,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:15,152 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:15:15,152 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 18:15:15,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:15,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:15,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:15,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:15,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:15,198 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 18:15:15,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:15,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:15,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:15,221 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 18:15:15,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:15,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:15,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:15,234 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 18:15:15,391 INFO L354 Elim1Store]: treesize reduction 144, result has 20.4 percent of original size [2021-11-25 18:15:15,391 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 18:15:15,439 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 18:15:15,514 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:15:15,618 INFO L354 Elim1Store]: treesize reduction 144, result has 20.4 percent of original size [2021-11-25 18:15:15,619 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 18:15:15,668 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 18:15:15,741 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:15:15,880 INFO L354 Elim1Store]: treesize reduction 144, result has 20.4 percent of original size [2021-11-25 18:15:15,880 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 18:15:15,928 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 18:15:15,999 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:15:16,110 INFO L354 Elim1Store]: treesize reduction 144, result has 20.4 percent of original size [2021-11-25 18:15:16,110 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 18:15:16,159 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 18:15:16,231 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:15:16,348 INFO L354 Elim1Store]: treesize reduction 144, result has 20.4 percent of original size [2021-11-25 18:15:16,349 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 18:15:16,407 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 18:15:16,448 INFO L197 IcfgInterpreter]: Interpreting procedure append with input of size 111 for LOIs [2021-11-25 18:15:16,846 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 18:15:16,852 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 18:15:16,857 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 18:15:16,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:15:16,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:16,871 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 18:15:16,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:16,879 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 18:15:16,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:16,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:16,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:16,897 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 30 treesize of output 32 [2021-11-25 18:15:16,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:16,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:16,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:16,906 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 18:15:16,913 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 18:15:16,927 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 18:15:16,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:16,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:16,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:16,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:16,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:16,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:16,941 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:15:16,941 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 18:15:16,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:16,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:16,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:16,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:16,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:16,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:16,956 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:15:16,956 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 18:15:16,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:16,976 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 18:15:16,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:16,985 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 18:15:16,989 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 18:15:17,007 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 18:15:17,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:17,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:17,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:17,017 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:15:17,017 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 18:15:17,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:17,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:17,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:17,031 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:15:17,031 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 1 case distinctions, treesize of input 29 treesize of output 31 [2021-11-25 18:15:17,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:17,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:17,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:17,113 INFO L354 Elim1Store]: treesize reduction 108, result has 34.9 percent of original size [2021-11-25 18:15:17,113 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 18:15:17,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:17,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:17,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:17,169 INFO L354 Elim1Store]: treesize reduction 94, result has 39.0 percent of original size [2021-11-25 18:15:17,170 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 18:15:17,190 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 18:15:17,237 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 18:15:17,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:17,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:17,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:17,309 INFO L354 Elim1Store]: treesize reduction 124, result has 22.5 percent of original size [2021-11-25 18:15:17,309 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 18:15:17,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:17,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:17,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:17,362 INFO L354 Elim1Store]: treesize reduction 110, result has 23.6 percent of original size [2021-11-25 18:15:17,363 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 18:15:17,414 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:15:21,573 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12809#(and (= (select (select |#memory_$Pointer$.base| append_~node~0.base) (+ 5 append_~node~0.offset)) 0) (<= 0 |#NULL.base|) (<= 0 (+ append_~input 128)) (= append_~node~0.offset 0) (<= 0 (+ 128 |append_#in~input|)) (= (select (select |#memory_$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$.base| append_~head.base) (+ append_~head.offset 4))) (<= (+ 8 append_~head.offset) (select |#length| append_~head.base)) (<= append_~head.offset 0) (<= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.offset| append_~node~0.base) (+ 5 append_~node~0.offset)) 0) (<= 0 |append_#in~head.offset|) (<= |append_#in~head.offset| 0) (<= 0 append_~head.offset) (or (< (select |#length| |append_#t~mem8.base|) (+ 9 |append_#t~mem8.offset|)) (< (+ 5 |append_#t~mem8.offset|) 0)) (<= |#NULL.base| 0) (= (select (select |#memory_$Pointer$.offset| append_~node~0.base) (+ append_~node~0.offset 1)) (select (select |#memory_$Pointer$.offset| append_~head.base) (+ append_~head.offset 4))) (= (select |#valid| append_~head.base) 1) (= (select |#valid| append_~node~0.base) 1) (<= append_~input 127) (<= |append_#in~input| 127) (<= 0 |#NULL.offset|) (= (select (select |#memory_$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)))' at error location [2021-11-25 18:15:21,574 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:15:21,574 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:15:21,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 27 [2021-11-25 18:15:21,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361701488] [2021-11-25 18:15:21,574 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:15:21,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-25 18:15:21,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:15:21,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-25 18:15:21,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=2851, Unknown=1, NotChecked=108, Total=3192 [2021-11-25 18:15:21,576 INFO L87 Difference]: Start difference. First operand 271 states and 323 transitions. Second operand has 28 states, 27 states have (on average 3.259259259259259) internal successors, (88), 25 states have internal predecessors, (88), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 18:15:23,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:15:23,266 INFO L93 Difference]: Finished difference Result 343 states and 428 transitions. [2021-11-25 18:15:23,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-25 18:15:23,277 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.259259259259259) internal successors, (88), 25 states have internal predecessors, (88), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2021-11-25 18:15:23,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:15:23,279 INFO L225 Difference]: With dead ends: 343 [2021-11-25 18:15:23,280 INFO L226 Difference]: Without dead ends: 343 [2021-11-25 18:15:23,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 80 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1559 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=470, Invalid=4935, Unknown=1, NotChecked=144, Total=5550 [2021-11-25 18:15:23,281 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 54 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 311 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:15:23,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 820 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 278 Invalid, 0 Unknown, 311 Unchecked, 0.2s Time] [2021-11-25 18:15:23,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-11-25 18:15:23,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 292. [2021-11-25 18:15:23,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 239 states have (on average 1.2719665271966527) internal successors, (304), 261 states have internal predecessors, (304), 18 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (31), 19 states have call predecessors, (31), 18 states have call successors, (31) [2021-11-25 18:15:23,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 353 transitions. [2021-11-25 18:15:23,294 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 353 transitions. Word has length 50 [2021-11-25 18:15:23,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:15:23,295 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 353 transitions. [2021-11-25 18:15:23,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.259259259259259) internal successors, (88), 25 states have internal predecessors, (88), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 18:15:23,295 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 353 transitions. [2021-11-25 18:15:23,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-25 18:15:23,296 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:15:23,296 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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 18:15:23,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-25 18:15:23,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:15:23,520 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting appendErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-25 18:15:23,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:15:23,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1694482866, now seen corresponding path program 2 times [2021-11-25 18:15:23,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:15:23,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582978858] [2021-11-25 18:15:23,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:15:23,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:15:23,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:15:23,975 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:15:23,976 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:15:23,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582978858] [2021-11-25 18:15:23,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582978858] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:15:23,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203457830] [2021-11-25 18:15:23,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:15:23,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:15:23,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:15:23,977 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:15:23,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-25 18:15:24,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-25 18:15:24,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:15:24,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-25 18:15:24,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:15:24,391 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 18:15:24,653 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 18:15:24,656 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 18:15:24,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:24,896 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 26 treesize of output 28 [2021-11-25 18:15:24,910 INFO L354 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2021-11-25 18:15:24,910 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 22 treesize of output 24 [2021-11-25 18:15:24,974 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 36 treesize of output 36 [2021-11-25 18:15:24,978 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 18:15:25,079 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 36 treesize of output 36 [2021-11-25 18:15:25,083 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 18:15:25,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 36 [2021-11-25 18:15:25,112 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 18:15:25,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:15:25,171 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 29 treesize of output 17 [2021-11-25 18:15:25,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:15:25,176 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:15:25,176 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 32 treesize of output 17 [2021-11-25 18:15:25,211 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 19 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 18:15:25,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:15:25,287 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3597 (Array Int Int))) (<= 0 (+ 5 (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_3597) c_append_~head.base) (+ c_append_~head.offset 4))))) (forall ((v_ArrVal_3596 (Array Int Int)) (v_ArrVal_3597 (Array Int Int))) (let ((.cse0 (+ c_append_~head.offset 4))) (<= (+ 9 (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_3597) c_append_~head.base) .cse0)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_3596) c_append_~head.base) .cse0)))))) is different from false [2021-11-25 18:15:25,664 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:15:25,665 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 73 treesize of output 74 [2021-11-25 18:15:25,672 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:15:25,672 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 74 treesize of output 64 [2021-11-25 18:15:25,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:15:25,684 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-11-25 18:15:25,684 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 61 treesize of output 52 [2021-11-25 18:15:25,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:15:25,693 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-25 18:15:25,693 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 46 treesize of output 28 [2021-11-25 18:15:25,702 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:15:25,702 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 47 treesize of output 51 [2021-11-25 18:15:25,710 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 18:15:25,710 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 24 [2021-11-25 18:15:26,061 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:15:26,061 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 73 treesize of output 74 [2021-11-25 18:15:26,067 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:15:26,067 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 74 treesize of output 64 [2021-11-25 18:15:26,077 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:15:26,077 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 94 treesize of output 97 [2021-11-25 18:15:26,087 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:15:26,087 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 159 treesize of output 150 [2021-11-25 18:15:26,094 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 111 treesize of output 103 [2021-11-25 18:15:26,099 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 103 treesize of output 95 [2021-11-25 18:15:26,104 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 95 treesize of output 91 [2021-11-25 18:15:26,620 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 64 treesize of output 60 [2021-11-25 18:15:27,302 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 7 not checked. [2021-11-25 18:15:27,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203457830] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:15:27,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2025557731] [2021-11-25 18:15:27,304 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2021-11-25 18:15:27,304 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:15:27,305 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:15:27,305 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:15:27,305 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:15:27,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:27,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:27,315 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 18:15:27,329 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 11 treesize of output 7 [2021-11-25 18:15:27,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:27,335 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 18:15:27,341 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 18:15:27,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:27,366 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 18:15:27,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:27,372 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 18:15:27,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:27,390 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 18:15:27,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:27,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:27,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:27,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:27,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:27,405 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 18:15:27,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:27,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:27,428 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 18:15:27,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:27,439 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 18:15:27,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:27,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:27,451 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 18:15:27,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:27,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 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 18:15:27,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:27,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:27,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:27,480 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 18:15:27,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:27,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:27,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:27,491 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 18:15:27,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:27,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:27,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:27,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:27,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:15:27,565 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:15:27,565 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 18:15:27,587 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 18:15:27,593 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 18:15:27,605 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 18:15:27,611 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 18:15:27,617 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 18:15:27,655 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 18:15:27,660 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 18:15:27,665 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 18:15:27,672 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 18:15:27,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:27,677 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 18:15:27,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:27,683 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 18:15:27,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:27,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:27,706 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-25 18:15:27,706 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 18:15:27,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:27,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:27,735 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-25 18:15:27,736 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 18:15:27,745 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 18:15:27,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:27,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:27,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:27,801 INFO L354 Elim1Store]: treesize reduction 56, result has 39.8 percent of original size [2021-11-25 18:15:27,802 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 18:15:27,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:27,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:27,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:27,843 INFO L354 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2021-11-25 18:15:27,843 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 18:15:27,851 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 18:15:27,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:27,866 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 18:15:27,872 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 18:15:27,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:27,879 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 18:15:27,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:27,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:27,910 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-25 18:15:27,910 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 18:15:27,917 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 18:15:27,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:27,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:27,941 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-25 18:15:27,941 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 18:15:27,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:27,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:28,023 INFO L354 Elim1Store]: treesize reduction 110, result has 39.6 percent of original size [2021-11-25 18:15:28,024 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 18:15:28,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:28,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:28,082 INFO L354 Elim1Store]: treesize reduction 86, result has 35.8 percent of original size [2021-11-25 18:15:28,082 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 18:15:28,091 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 15 treesize of output 1 [2021-11-25 18:15:28,159 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 18:15:28,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:28,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:28,258 INFO L354 Elim1Store]: treesize reduction 178, result has 31.0 percent of original size [2021-11-25 18:15:28,258 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 18:15:28,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:28,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:28,355 INFO L354 Elim1Store]: treesize reduction 132, result has 37.1 percent of original size [2021-11-25 18:15:28,355 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 386 [2021-11-25 18:15:49,612 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-25 18:15:49,623 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-25 18:15:49,623 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-25 18:15:49,934 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-25 18:15:49,944 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-25 18:15:49,944 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-25 18:15:50,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:50,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:50,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:50,265 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 18:15:50,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:50,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:50,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:50,274 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 18:15:50,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:50,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:50,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:50,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:50,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:50,283 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 18:15:50,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:50,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:50,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:50,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:50,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:15:50,324 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:15:50,325 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 18:15:50,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:50,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:50,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:50,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:50,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:50,352 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 18:15:50,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:50,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:50,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:50,360 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 18:15:50,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:50,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:50,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:50,368 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 18:15:50,509 INFO L354 Elim1Store]: treesize reduction 144, result has 20.4 percent of original size [2021-11-25 18:15:50,510 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 18:15:50,578 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 18:15:50,675 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:15:50,786 INFO L354 Elim1Store]: treesize reduction 144, result has 20.4 percent of original size [2021-11-25 18:15:50,786 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 18:15:50,845 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 18:15:50,924 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:15:51,062 INFO L354 Elim1Store]: treesize reduction 144, result has 20.4 percent of original size [2021-11-25 18:15:51,062 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 18:15:51,121 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 18:15:51,189 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:15:51,299 INFO L354 Elim1Store]: treesize reduction 144, result has 20.4 percent of original size [2021-11-25 18:15:51,299 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 18:15:51,365 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 18:15:51,442 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:15:51,561 INFO L354 Elim1Store]: treesize reduction 144, result has 20.4 percent of original size [2021-11-25 18:15:51,561 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 18:15:51,609 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 18:15:51,660 INFO L197 IcfgInterpreter]: Interpreting procedure append with input of size 111 for LOIs [2021-11-25 18:15:52,052 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 18:15:52,056 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 11 treesize of output 7 [2021-11-25 18:15:52,060 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 15 treesize of output 1 [2021-11-25 18:15:52,073 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 18:15:52,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:52,079 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 18:15:52,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:52,085 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 18:15:52,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:52,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:52,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:52,102 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 18:15:52,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:52,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:52,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:52,111 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 18:15:52,123 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 18:15:52,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:52,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:52,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:52,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:52,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:52,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:52,143 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:15:52,143 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 18:15:52,150 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 18:15:52,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:52,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:52,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:52,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:52,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:52,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:52,164 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:15:52,164 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 18:15:52,182 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 18:15:52,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:52,189 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 18:15:52,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:52,195 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 18:15:52,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:52,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:52,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:52,215 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:15:52,215 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 18:15:52,221 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 18:15:52,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:52,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:52,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:52,231 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:15:52,231 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 18:15:52,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:52,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:52,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:52,319 INFO L354 Elim1Store]: treesize reduction 108, result has 34.9 percent of original size [2021-11-25 18:15:52,320 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 18:15:52,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:52,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:52,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:52,377 INFO L354 Elim1Store]: treesize reduction 94, result has 39.0 percent of original size [2021-11-25 18:15:52,377 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 18:15:52,384 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 18:15:52,418 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 18:15:52,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:52,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:52,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:52,471 INFO L354 Elim1Store]: treesize reduction 124, result has 22.5 percent of original size [2021-11-25 18:15:52,471 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 18:15:52,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:52,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:52,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:52,514 INFO L354 Elim1Store]: treesize reduction 110, result has 23.6 percent of original size [2021-11-25 18:15:52,515 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 18:15:52,574 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:15:56,619 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13850#(and (= (select (select |#memory_$Pointer$.base| append_~node~0.base) (+ 5 append_~node~0.offset)) 0) (<= 0 |#NULL.base|) (<= 0 (+ append_~input 128)) (= append_~node~0.offset 0) (<= 0 (+ 128 |append_#in~input|)) (= (select (select |#memory_$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$.base| append_~head.base) (+ append_~head.offset 4))) (<= (+ 8 append_~head.offset) (select |#length| append_~head.base)) (<= append_~head.offset 0) (<= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.offset| append_~node~0.base) (+ 5 append_~node~0.offset)) 0) (<= 0 |append_#in~head.offset|) (<= |append_#in~head.offset| 0) (<= 0 append_~head.offset) (or (< (select |#length| |append_#t~mem8.base|) (+ 9 |append_#t~mem8.offset|)) (< (+ 5 |append_#t~mem8.offset|) 0)) (<= |#NULL.base| 0) (= (select (select |#memory_$Pointer$.offset| append_~node~0.base) (+ append_~node~0.offset 1)) (select (select |#memory_$Pointer$.offset| append_~head.base) (+ append_~head.offset 4))) (= (select |#valid| append_~head.base) 1) (= (select |#valid| append_~node~0.base) 1) (<= append_~input 127) (<= |append_#in~input| 127) (<= 0 |#NULL.offset|) (= (select (select |#memory_$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)))' at error location [2021-11-25 18:15:56,619 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:15:56,620 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:15:56,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 12] total 39 [2021-11-25 18:15:56,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2825690] [2021-11-25 18:15:56,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:15:56,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-25 18:15:56,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:15:56,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-25 18:15:56,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=3284, Unknown=5, NotChecked=116, Total=3660 [2021-11-25 18:15:56,622 INFO L87 Difference]: Start difference. First operand 292 states and 353 transitions. Second operand has 39 states, 39 states have (on average 3.0) internal successors, (117), 35 states have internal predecessors, (117), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-25 18:16:00,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:16:00,747 INFO L93 Difference]: Finished difference Result 439 states and 527 transitions. [2021-11-25 18:16:00,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-25 18:16:00,748 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.0) internal successors, (117), 35 states have internal predecessors, (117), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 51 [2021-11-25 18:16:00,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:16:00,751 INFO L225 Difference]: With dead ends: 439 [2021-11-25 18:16:00,751 INFO L226 Difference]: Without dead ends: 428 [2021-11-25 18:16:00,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 3616 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=1034, Invalid=10955, Unknown=5, NotChecked=216, Total=12210 [2021-11-25 18:16:00,754 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 234 mSDsluCounter, 1103 mSDsCounter, 0 mSdLazyCounter, 1112 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 1079 SdHoareTripleChecker+Invalid, 2134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 935 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:16:00,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 1079 Invalid, 2134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1112 Invalid, 0 Unknown, 935 Unchecked, 0.7s Time] [2021-11-25 18:16:00,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-11-25 18:16:00,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 342. [2021-11-25 18:16:00,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 282 states have (on average 1.2553191489361701) internal successors, (354), 307 states have internal predecessors, (354), 21 states have call successors, (21), 12 states have call predecessors, (21), 14 states have return successors, (33), 22 states have call predecessors, (33), 21 states have call successors, (33) [2021-11-25 18:16:00,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 408 transitions. [2021-11-25 18:16:00,769 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 408 transitions. Word has length 51 [2021-11-25 18:16:00,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:16:00,770 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 408 transitions. [2021-11-25 18:16:00,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.0) internal successors, (117), 35 states have internal predecessors, (117), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-25 18:16:00,770 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 408 transitions. [2021-11-25 18:16:00,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-25 18:16:00,771 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:16:00,771 INFO L514 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1] [2021-11-25 18:16:00,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-25 18:16:00,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-25 18:16:00,988 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting appendErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-25 18:16:00,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:16:00,989 INFO L85 PathProgramCache]: Analyzing trace with hash -973955427, now seen corresponding path program 1 times [2021-11-25 18:16:00,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:16:00,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961884980] [2021-11-25 18:16:00,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:16:00,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:16:01,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:16:05,047 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:16:05,047 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:16:05,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961884980] [2021-11-25 18:16:05,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961884980] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:16:05,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29850028] [2021-11-25 18:16:05,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:16:05,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:16:05,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:16:05,048 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:16:05,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-25 18:16:05,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:16:05,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 113 conjunts are in the unsatisfiable core [2021-11-25 18:16:05,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:16:05,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:16:05,367 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:16:05,367 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 18:16:05,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:16:05,425 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 18:16:05,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:05,484 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 18:16:05,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:05,493 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 18:16:05,956 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 17 [2021-11-25 18:16:06,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:06,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:06,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 32 [2021-11-25 18:16:06,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:06,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:06,362 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 37 treesize of output 32 [2021-11-25 18:16:06,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:06,389 INFO L354 Elim1Store]: treesize reduction 49, result has 34.7 percent of original size [2021-11-25 18:16:06,389 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 34 treesize of output 46 [2021-11-25 18:16:07,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:07,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:07,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:07,485 INFO L354 Elim1Store]: treesize reduction 42, result has 27.6 percent of original size [2021-11-25 18:16:07,485 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 81 [2021-11-25 18:16:07,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:07,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:07,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:07,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:07,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:07,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 37 [2021-11-25 18:16:07,537 INFO L354 Elim1Store]: treesize reduction 66, result has 35.3 percent of original size [2021-11-25 18:16:07,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 53 [2021-11-25 18:16:07,543 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 26 treesize of output 14 [2021-11-25 18:16:10,006 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-11-25 18:16:10,006 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 18:16:10,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 21 [2021-11-25 18:16:10,085 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 21 [2021-11-25 18:16:10,167 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:16:10,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:16:10,189 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3861 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_3861) c_append_~head.base) c_append_~head.offset) 0)) (forall ((v_ArrVal_3862 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_3862) c_append_~head.base) c_append_~head.offset) 0))) is different from false [2021-11-25 18:16:16,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29850028] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:16:16,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1407400386] [2021-11-25 18:16:16,038 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2021-11-25 18:16:16,038 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:16:16,038 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:16:16,039 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:16:16,039 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:16:16,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:16,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:16,054 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 18:16:16,070 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 18:16:16,075 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 18:16:16,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:16,083 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 18:16:16,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:16,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:16,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:16,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:16,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:16,104 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 18:16:16,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:16,111 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 18:16:16,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:16,119 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 18:16:16,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:16,126 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 18:16:16,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:16,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:16,143 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 18:16:16,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:16,152 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 18:16:16,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:16,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:16,163 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 18:16:16,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:16,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:16,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:16,229 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 18:16:16,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:16,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:16,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:16,238 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 18:16:16,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:16,246 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 18:16:16,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:16,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:16,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:16,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:16,293 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:16:16,293 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 18:16:16,310 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 18:16:16,314 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 18:16:16,321 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 18:16:16,325 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 18:16:16,329 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 18:16:16,359 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 11 treesize of output 7 [2021-11-25 18:16:16,362 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 11 treesize of output 7 [2021-11-25 18:16:16,366 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 15 treesize of output 1 [2021-11-25 18:16:16,371 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 18:16:16,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:16,375 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 18:16:16,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:16,381 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 18:16:16,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:16,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:16,405 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-25 18:16:16,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 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 18:16:16,411 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 18:16:16,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:16,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:16,427 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-25 18:16:16,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 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 18:16:16,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:16,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:16,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:16,470 INFO L354 Elim1Store]: treesize reduction 56, result has 39.8 percent of original size [2021-11-25 18:16:16,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 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 18:16:16,481 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 18:16:16,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:16,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:16,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:16,508 INFO L354 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2021-11-25 18:16:16,509 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 18:16:16,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:16,519 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 18:16:16,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:16,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 18:16:16,530 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 18:16:16,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:16,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:16,554 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-25 18:16:16,554 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 2 case distinctions, treesize of input 29 treesize of output 41 [2021-11-25 18:16:16,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:16,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:16,578 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-25 18:16:16,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 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 18:16:16,584 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 18:16:16,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:16,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:16,669 INFO L354 Elim1Store]: treesize reduction 110, result has 39.6 percent of original size [2021-11-25 18:16:16,669 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 18:16:16,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:16,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:16,725 INFO L354 Elim1Store]: treesize reduction 86, result has 35.8 percent of original size [2021-11-25 18:16:16,725 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 18:16:16,733 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 18:16:16,800 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 18:16:16,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:16,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:16,890 INFO L354 Elim1Store]: treesize reduction 190, result has 31.2 percent of original size [2021-11-25 18:16:16,891 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 18:16:16,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:16,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:16,984 INFO L354 Elim1Store]: treesize reduction 122, result has 38.4 percent of original size [2021-11-25 18:16:16,984 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 18:16:23,286 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2021-11-25 18:16:23,286 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-25 18:16:23,292 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2021-11-25 18:16:23,295 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-25 18:16:23,396 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2021-11-25 18:16:23,397 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-25 18:16:23,402 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2021-11-25 18:16:23,405 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-25 18:16:23,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:23,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:23,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:23,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:23,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:23,509 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 18:16:23,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:23,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:23,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:23,517 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 18:16:23,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:23,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:23,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:23,525 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 18:16:23,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:23,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:23,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:23,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:23,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:23,568 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:16:23,569 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 18:16:23,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:23,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:23,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:23,594 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 18:16:23,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:23,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:23,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:23,601 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 18:16:23,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:23,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:23,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:23,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:23,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:23,613 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 18:16:23,747 INFO L354 Elim1Store]: treesize reduction 144, result has 20.4 percent of original size [2021-11-25 18:16:23,748 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 18:16:23,796 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 18:16:23,881 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:16:23,994 INFO L354 Elim1Store]: treesize reduction 144, result has 20.4 percent of original size [2021-11-25 18:16:23,994 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 18:16:24,056 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 18:16:24,123 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:16:24,270 INFO L354 Elim1Store]: treesize reduction 144, result has 20.4 percent of original size [2021-11-25 18:16:24,271 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 18:16:24,332 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 18:16:24,403 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:16:24,527 INFO L354 Elim1Store]: treesize reduction 144, result has 20.4 percent of original size [2021-11-25 18:16:24,527 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 18:16:24,589 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 18:16:24,657 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:16:24,720 INFO L354 Elim1Store]: treesize reduction 24, result has 41.5 percent of original size [2021-11-25 18:16:24,721 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 18:16:24,825 INFO L354 Elim1Store]: treesize reduction 144, result has 20.4 percent of original size [2021-11-25 18:16:24,826 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 18:16:24,876 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 18:16:24,932 INFO L197 IcfgInterpreter]: Interpreting procedure append with input of size 116 for LOIs [2021-11-25 18:16:25,754 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 18:16:25,761 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 18:16:25,768 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 18:16:25,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:25,787 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 18:16:25,795 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 18:16:25,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:25,805 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 18:16:25,823 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 18:16:25,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:25,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:25,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:25,834 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 30 treesize of output 32 [2021-11-25 18:16:25,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:25,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:25,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:25,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 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 18:16:25,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:25,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:25,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:25,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:25,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:25,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:25,876 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:16:25,876 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 18:16:25,885 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 18:16:25,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:25,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:25,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:25,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:25,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:25,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:25,899 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:16:25,899 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 18:16:25,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:25,923 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 18:16:25,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:25,930 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 18:16:25,935 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 18:16:25,948 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 18:16:25,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:25,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:25,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:25,959 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:16:25,960 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 18:16:25,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:25,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:25,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:25,970 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:16:25,971 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 1 case distinctions, treesize of input 29 treesize of output 31 [2021-11-25 18:16:25,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:25,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:25,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:26,052 INFO L354 Elim1Store]: treesize reduction 108, result has 34.9 percent of original size [2021-11-25 18:16:26,052 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 18:16:26,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:26,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:26,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:26,112 INFO L354 Elim1Store]: treesize reduction 94, result has 39.0 percent of original size [2021-11-25 18:16:26,113 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 18:16:26,121 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 18:16:26,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:26,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:26,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:26,213 INFO L354 Elim1Store]: treesize reduction 150, result has 19.8 percent of original size [2021-11-25 18:16:26,213 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 18:16:26,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:26,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:26,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:26,299 INFO L354 Elim1Store]: treesize reduction 132, result has 32.3 percent of original size [2021-11-25 18:16:26,299 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 18:16:26,631 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 18:16:26,673 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:16:32,466 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15024#(and (= (select (select |#memory_$Pointer$.base| append_~node~0.base) (+ 5 append_~node~0.offset)) 0) (<= 0 |#NULL.base|) (<= 0 (+ append_~input 128)) (= append_~node~0.offset 0) (<= 0 (+ 128 |append_#in~input|)) (= (select (select |#memory_$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$.base| append_~head.base) (+ append_~head.offset 4))) (<= (+ 8 append_~head.offset) (select |#length| append_~head.base)) (<= append_~head.offset 0) (<= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.offset| append_~node~0.base) (+ 5 append_~node~0.offset)) 0) (<= 0 |append_#in~head.offset|) (<= |append_#in~head.offset| 0) (<= 0 append_~head.offset) (not (= (select |#valid| |append_#t~mem8.base|) 1)) (<= |#NULL.base| 0) (= (select (select |#memory_$Pointer$.offset| append_~node~0.base) (+ append_~node~0.offset 1)) (select (select |#memory_$Pointer$.offset| append_~head.base) (+ append_~head.offset 4))) (= (select |#valid| append_~head.base) 1) (= (select |#valid| append_~node~0.base) 1) (<= append_~input 127) (<= |append_#in~input| 127) (<= 0 |#NULL.offset|) (= (select (select |#memory_$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)))' at error location [2021-11-25 18:16:32,466 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:16:32,466 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:16:32,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 44 [2021-11-25 18:16:32,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524055654] [2021-11-25 18:16:32,466 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:16:32,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-25 18:16:32,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:16:32,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-25 18:16:32,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=4707, Unknown=73, NotChecked=140, Total=5256 [2021-11-25 18:16:32,468 INFO L87 Difference]: Start difference. First operand 342 states and 408 transitions. Second operand has 45 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 41 states have internal predecessors, (85), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-25 18:16:37,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:16:37,208 INFO L93 Difference]: Finished difference Result 403 states and 479 transitions. [2021-11-25 18:16:37,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-25 18:16:37,209 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 41 states have internal predecessors, (85), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 51 [2021-11-25 18:16:37,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:16:37,211 INFO L225 Difference]: With dead ends: 403 [2021-11-25 18:16:37,211 INFO L226 Difference]: Without dead ends: 394 [2021-11-25 18:16:37,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 74 SyntacticMatches, 5 SemanticMatches, 89 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2890 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=563, Invalid=7317, Unknown=134, NotChecked=176, Total=8190 [2021-11-25 18:16:37,213 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 60 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 903 SdHoareTripleChecker+Invalid, 1016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 450 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:16:37,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 903 Invalid, 1016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 548 Invalid, 0 Unknown, 450 Unchecked, 0.7s Time] [2021-11-25 18:16:37,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-11-25 18:16:37,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 374. [2021-11-25 18:16:37,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 310 states have (on average 1.2451612903225806) internal successors, (386), 336 states have internal predecessors, (386), 23 states have call successors, (23), 14 states have call predecessors, (23), 16 states have return successors, (39), 23 states have call predecessors, (39), 23 states have call successors, (39) [2021-11-25 18:16:37,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 448 transitions. [2021-11-25 18:16:37,227 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 448 transitions. Word has length 51 [2021-11-25 18:16:37,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:16:37,227 INFO L470 AbstractCegarLoop]: Abstraction has 374 states and 448 transitions. [2021-11-25 18:16:37,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 41 states have internal predecessors, (85), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-25 18:16:37,228 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 448 transitions. [2021-11-25 18:16:37,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-25 18:16:37,229 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:16:37,229 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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 18:16:37,263 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-11-25 18:16:37,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-25 18:16:37,445 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 18:16:37,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:16:37,445 INFO L85 PathProgramCache]: Analyzing trace with hash 863976753, now seen corresponding path program 2 times [2021-11-25 18:16:37,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:16:37,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267154372] [2021-11-25 18:16:37,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:16:37,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:16:37,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:16:38,142 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 18:16:38,142 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:16:38,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267154372] [2021-11-25 18:16:38,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267154372] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:16:38,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935322285] [2021-11-25 18:16:38,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:16:38,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:16:38,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:16:38,144 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:16:38,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5374006-7d76-4731-ba9e-9faa858ce1ce/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-25 18:16:38,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-25 18:16:38,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:16:38,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 71 conjunts are in the unsatisfiable core [2021-11-25 18:16:38,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:16:38,621 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 18:16:38,624 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 18:16:38,813 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-25 18:16:38,814 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 31 treesize of output 40 [2021-11-25 18:16:38,832 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-25 18:16:38,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 36 [2021-11-25 18:16:38,955 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-25 18:16:38,956 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 36 treesize of output 43 [2021-11-25 18:16:38,973 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-25 18:16:38,974 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 32 treesize of output 39 [2021-11-25 18:16:39,152 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-25 18:16:39,152 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 45 treesize of output 54 [2021-11-25 18:16:39,172 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-25 18:16:39,172 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 41 treesize of output 50 [2021-11-25 18:16:39,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:39,505 INFO L354 Elim1Store]: treesize reduction 39, result has 32.8 percent of original size [2021-11-25 18:16:39,505 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 2 case distinctions, treesize of input 67 treesize of output 67 [2021-11-25 18:16:39,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:39,510 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 45 treesize of output 44 [2021-11-25 18:16:39,760 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:16:39,760 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 11 treesize of output 11 [2021-11-25 18:16:39,812 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 24 treesize of output 26 [2021-11-25 18:16:39,815 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 24 treesize of output 26 [2021-11-25 18:16:39,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2021-11-25 18:16:39,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-11-25 18:16:39,900 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 18:16:39,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:16:39,976 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_4132 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_4132) c_append_~head.base) c_append_~head.offset) 0))) (forall ((v_ArrVal_4133 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_4133) c_append_~head.base) c_append_~head.offset) 0)))) is different from false [2021-11-25 18:16:40,001 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4132 (Array Int Int)) (v_ArrVal_4133 (Array Int Int)) (v_append_~node~0.base_109 Int)) (or (not (= (select |c_#valid| v_append_~node~0.base_109) 0)) (not (= (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_109 v_ArrVal_4133) |c_append_#in~head.base|) |c_append_#in~head.offset|) 0)) (not (= (select (select (store |c_#memory_$Pointer$.offset| v_append_~node~0.base_109 v_ArrVal_4132) |c_append_#in~head.base|) |c_append_#in~head.offset|) 0)))) is different from false [2021-11-25 18:16:40,028 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4132 (Array Int Int)) (v_ArrVal_4133 (Array Int Int)) (v_append_~node~0.base_109 Int)) (or (not (= (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_109 v_ArrVal_4133) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) 0)) (not (= (select |c_#valid| v_append_~node~0.base_109) 0)) (not (= (select (select (store |c_#memory_$Pointer$.offset| v_append_~node~0.base_109 v_ArrVal_4132) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) 0)))) is different from false [2021-11-25 18:16:42,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:42,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:42,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:42,526 INFO L354 Elim1Store]: treesize reduction 270, result has 28.0 percent of original size [2021-11-25 18:16:42,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 142 treesize of output 156 [2021-11-25 18:16:42,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:42,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:42,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:42,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:42,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:42,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:42,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:42,643 INFO L354 Elim1Store]: treesize reduction 202, result has 29.9 percent of original size [2021-11-25 18:16:42,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 130 treesize of output 125 [2021-11-25 18:16:42,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:42,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:42,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:42,722 INFO L354 Elim1Store]: treesize reduction 15, result has 78.3 percent of original size [2021-11-25 18:16:42,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 6 case distinctions, treesize of input 84 treesize of output 115 [2021-11-25 18:16:42,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:42,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:42,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:42,803 INFO L354 Elim1Store]: treesize reduction 15, result has 78.3 percent of original size [2021-11-25 18:16:42,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 6 case distinctions, treesize of input 84 treesize of output 115 [2021-11-25 18:16:42,841 INFO L354 Elim1Store]: treesize reduction 18, result has 28.0 percent of original size [2021-11-25 18:16:42,841 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 19 treesize of output 19 [2021-11-25 18:16:43,796 INFO L354 Elim1Store]: treesize reduction 18, result has 28.0 percent of original size [2021-11-25 18:16:43,796 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 19 treesize of output 19 [2021-11-25 18:16:45,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:45,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:45,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:45,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:46,804 INFO L354 Elim1Store]: treesize reduction 320, result has 35.9 percent of original size [2021-11-25 18:16:46,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 158 treesize of output 230 [2021-11-25 18:16:46,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:46,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:46,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:46,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:47,037 INFO L354 Elim1Store]: treesize reduction 320, result has 35.9 percent of original size [2021-11-25 18:16:47,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 167 treesize of output 239 [2021-11-25 18:16:47,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:47,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:47,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:47,178 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:16:47,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 193 treesize of output 317 [2021-11-25 18:16:47,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:47,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:47,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:47,307 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:16:47,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 193 treesize of output 317 [2021-11-25 18:16:47,335 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 18:16:47,362 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 18:16:51,620 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 7 not checked. [2021-11-25 18:16:51,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935322285] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:16:51,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1634999833] [2021-11-25 18:16:51,622 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2021-11-25 18:16:51,622 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:16:51,622 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:16:51,622 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:16:51,622 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:16:51,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:51,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:51,644 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 18:16:51,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:51,655 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 18:16:51,660 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 18:16:51,667 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 18:16:51,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:51,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:51,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:51,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:51,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:51,684 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 18:16:51,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:51,692 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 18:16:51,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:51,699 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 18:16:51,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:51,706 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 18:16:51,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:51,722 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 18:16:51,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:51,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:51,731 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 18:16:51,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:51,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:51,740 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 18:16:51,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:51,762 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 18:16:51,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:51,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:51,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:51,771 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 18:16:51,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:51,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:51,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:51,781 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 18:16:51,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:51,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:51,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:51,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:51,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:51,831 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:16:51,831 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 18:16:51,849 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 18:16:51,854 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 18:16:51,861 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 18:16:51,866 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 15 treesize of output 1 [2021-11-25 18:16:51,871 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 18:16:51,901 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 18:16:51,904 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 18:16:51,908 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 18:16:51,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:51,915 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 18:16:51,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:51,920 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 18:16:51,925 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 18:16:51,933 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 18:16:51,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:51,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:51,955 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-25 18:16:51,955 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 18:16:51,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:51,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:51,973 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-25 18:16:51,974 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 18:16:51,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:51,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:51,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:52,005 INFO L354 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2021-11-25 18:16:52,005 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 18:16:52,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:52,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:52,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:52,050 INFO L354 Elim1Store]: treesize reduction 56, result has 39.8 percent of original size [2021-11-25 18:16:52,050 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 3 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 74 [2021-11-25 18:16:52,062 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 18:16:52,073 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 18:16:52,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:52,078 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 18:16:52,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:52,084 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 18:16:52,091 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 18:16:52,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:52,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:52,114 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-25 18:16:52,115 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 18:16:52,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:52,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:52,139 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-25 18:16:52,140 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 18:16:52,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:52,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:52,232 INFO L354 Elim1Store]: treesize reduction 110, result has 39.6 percent of original size [2021-11-25 18:16:52,232 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 18:16:52,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:52,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:52,290 INFO L354 Elim1Store]: treesize reduction 86, result has 35.8 percent of original size [2021-11-25 18:16:52,290 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 18:16:52,298 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 18:16:52,367 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 18:16:52,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:52,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:52,478 INFO L354 Elim1Store]: treesize reduction 176, result has 32.8 percent of original size [2021-11-25 18:16:52,478 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 438 treesize of output 393 [2021-11-25 18:16:52,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:52,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:52,565 INFO L354 Elim1Store]: treesize reduction 136, result has 31.3 percent of original size [2021-11-25 18:16:52,566 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 361 treesize of output 336