./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2n_update_all.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_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/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_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2n_update_all.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/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_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/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 1fd0aba5d9be2820550e57012fb4e12f76fe291bb253443319d08539e5b2ba1a --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:38:22,570 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:38:22,574 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:38:22,614 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:38:22,615 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:38:22,616 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:38:22,618 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:38:22,621 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:38:22,624 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:38:22,626 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:38:22,628 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:38:22,630 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:38:22,630 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:38:22,632 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:38:22,635 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:38:22,637 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:38:22,638 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:38:22,640 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:38:22,643 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:38:22,646 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:38:22,649 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:38:22,651 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:38:22,653 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:38:22,654 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:38:22,659 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:38:22,660 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:38:22,661 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:38:22,662 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:38:22,663 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:38:22,665 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:38:22,665 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:38:22,667 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:38:22,668 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:38:22,669 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:38:22,671 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:38:22,672 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:38:22,673 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:38:22,673 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:38:22,674 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:38:22,676 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:38:22,677 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:38:22,678 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-25 18:38:22,712 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:38:22,713 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:38:22,713 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:38:22,713 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:38:22,714 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:38:22,715 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:38:22,715 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:38:22,715 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:38:22,715 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:38:22,716 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:38:22,716 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:38:22,716 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:38:22,717 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:38:22,717 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:38:22,717 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:38:22,718 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:38:22,718 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:38:22,718 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:38:22,719 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-25 18:38:22,719 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-25 18:38:22,720 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:38:22,720 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:38:22,720 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 18:38:22,721 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:38:22,721 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:38:22,721 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:38:22,721 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-25 18:38:22,722 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-25 18:38:22,722 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-25 18:38:22,722 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:38:22,723 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 18:38:22,723 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:38:22,723 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:38:22,724 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:38:22,724 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:38:22,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:38:22,724 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:38:22,725 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:38:22,725 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:38:22,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:38:22,726 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:38:22,726 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:38:22,726 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_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1fd0aba5d9be2820550e57012fb4e12f76fe291bb253443319d08539e5b2ba1a [2021-11-25 18:38:23,066 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:38:23,109 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:38:23,113 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:38:23,114 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:38:23,115 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:38:23,117 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/list-simple/sll2n_update_all.i [2021-11-25 18:38:23,216 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/data/fd009dfe6/e7e3c6ac013d46cb8500b50e543527e3/FLAGc3d8a51e8 [2021-11-25 18:38:23,840 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:38:23,841 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/sv-benchmarks/c/list-simple/sll2n_update_all.i [2021-11-25 18:38:23,857 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/data/fd009dfe6/e7e3c6ac013d46cb8500b50e543527e3/FLAGc3d8a51e8 [2021-11-25 18:38:24,131 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/data/fd009dfe6/e7e3c6ac013d46cb8500b50e543527e3 [2021-11-25 18:38:24,136 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:38:24,139 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:38:24,142 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:38:24,142 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:38:24,147 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:38:24,148 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:38:24" (1/1) ... [2021-11-25 18:38:24,153 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70497fae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:38:24, skipping insertion in model container [2021-11-25 18:38:24,153 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:38:24" (1/1) ... [2021-11-25 18:38:24,162 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:38:24,236 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:38:24,692 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/sv-benchmarks/c/list-simple/sll2n_update_all.i[24218,24231] [2021-11-25 18:38:24,695 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:38:24,704 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:38:24,781 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/sv-benchmarks/c/list-simple/sll2n_update_all.i[24218,24231] [2021-11-25 18:38:24,782 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:38:24,827 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:38:24,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:38:24 WrapperNode [2021-11-25 18:38:24,828 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:38:24,829 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:38:24,830 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:38:24,830 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:38:24,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:38:24" (1/1) ... [2021-11-25 18:38:24,882 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:38:24" (1/1) ... [2021-11-25 18:38:24,926 INFO L137 Inliner]: procedures = 126, calls = 22, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 121 [2021-11-25 18:38:24,926 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:38:24,928 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:38:24,928 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:38:24,929 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:38:24,938 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:38:24" (1/1) ... [2021-11-25 18:38:24,940 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:38:24" (1/1) ... [2021-11-25 18:38:24,965 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:38:24" (1/1) ... [2021-11-25 18:38:24,965 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:38:24" (1/1) ... [2021-11-25 18:38:24,974 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:38:24" (1/1) ... [2021-11-25 18:38:24,991 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:38:24" (1/1) ... [2021-11-25 18:38:24,994 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:38:24" (1/1) ... [2021-11-25 18:38:25,003 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:38:25,004 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:38:25,004 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:38:25,009 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:38:25,010 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:38:24" (1/1) ... [2021-11-25 18:38:25,020 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:38:25,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:38:25,056 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:38:25,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:38:25,119 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 18:38:25,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 18:38:25,120 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 18:38:25,120 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:38:25,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 18:38:25,121 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 18:38:25,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 18:38:25,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:38:25,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:38:25,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:38:25,310 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:38:25,312 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:38:25,670 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:38:25,771 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:38:25,772 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-11-25 18:38:25,775 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:38:25 BoogieIcfgContainer [2021-11-25 18:38:25,775 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:38:25,780 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:38:25,781 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:38:25,786 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:38:25,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:38:24" (1/3) ... [2021-11-25 18:38:25,789 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5db98e32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:38:25, skipping insertion in model container [2021-11-25 18:38:25,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:38:24" (2/3) ... [2021-11-25 18:38:25,790 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5db98e32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:38:25, skipping insertion in model container [2021-11-25 18:38:25,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:38:25" (3/3) ... [2021-11-25 18:38:25,792 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2n_update_all.i [2021-11-25 18:38:25,799 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:38:25,799 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2021-11-25 18:38:25,878 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:38:25,890 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 18:38:25,890 INFO L340 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2021-11-25 18:38:25,911 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 23 states have (on average 2.260869565217391) internal successors, (52), 44 states have internal predecessors, (52), 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 18:38:25,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-25 18:38:25,928 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:38:25,929 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-25 18:38:25,929 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:38:25,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:38:25,937 INFO L85 PathProgramCache]: Analyzing trace with hash 5402296, now seen corresponding path program 1 times [2021-11-25 18:38:25,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:38:25,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344286153] [2021-11-25 18:38:25,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:38:25,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:38:26,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:38:26,184 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 18:38:26,185 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:38:26,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344286153] [2021-11-25 18:38:26,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344286153] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:38:26,187 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:38:26,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:38:26,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192534938] [2021-11-25 18:38:26,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:38:26,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:38:26,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:38:26,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:38:26,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:38:26,238 INFO L87 Difference]: Start difference. First operand has 45 states, 23 states have (on average 2.260869565217391) internal successors, (52), 44 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 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 18:38:26,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:38:26,414 INFO L93 Difference]: Finished difference Result 76 states and 87 transitions. [2021-11-25 18:38:26,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:38:26,422 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 18:38:26,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:38:26,434 INFO L225 Difference]: With dead ends: 76 [2021-11-25 18:38:26,434 INFO L226 Difference]: Without dead ends: 73 [2021-11-25 18:38:26,436 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 18:38:26,443 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 45 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:38:26,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 59 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:38:26,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-25 18:38:26,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 41. [2021-11-25 18:38:26,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 22 states have (on average 2.090909090909091) internal successors, (46), 40 states have internal predecessors, (46), 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 18:38:26,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2021-11-25 18:38:26,499 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 4 [2021-11-25 18:38:26,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:38:26,500 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2021-11-25 18:38:26,500 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 18:38:26,500 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2021-11-25 18:38:26,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-25 18:38:26,501 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:38:26,502 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-25 18:38:26,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:38:26,502 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:38:26,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:38:26,503 INFO L85 PathProgramCache]: Analyzing trace with hash 5402297, now seen corresponding path program 1 times [2021-11-25 18:38:26,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:38:26,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722365061] [2021-11-25 18:38:26,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:38:26,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:38:26,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:38:26,586 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 18:38:26,586 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:38:26,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722365061] [2021-11-25 18:38:26,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722365061] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:38:26,587 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:38:26,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:38:26,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951712898] [2021-11-25 18:38:26,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:38:26,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:38:26,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:38:26,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:38:26,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:38:26,591 INFO L87 Difference]: Start difference. First operand 41 states and 46 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 18:38:26,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:38:26,747 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2021-11-25 18:38:26,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:38:26,748 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 18:38:26,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:38:26,749 INFO L225 Difference]: With dead ends: 71 [2021-11-25 18:38:26,749 INFO L226 Difference]: Without dead ends: 71 [2021-11-25 18:38:26,750 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 18:38:26,752 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 41 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:38:26,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 64 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:38:26,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-25 18:38:26,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 39. [2021-11-25 18:38:26,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 22 states have (on average 2.0) internal successors, (44), 38 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:38:26,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2021-11-25 18:38:26,761 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 4 [2021-11-25 18:38:26,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:38:26,762 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2021-11-25 18:38:26,762 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 18:38:26,762 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2021-11-25 18:38:26,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-25 18:38:26,763 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:38:26,763 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-25 18:38:26,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 18:38:26,764 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:38:26,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:38:26,765 INFO L85 PathProgramCache]: Analyzing trace with hash 172148575, now seen corresponding path program 1 times [2021-11-25 18:38:26,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:38:26,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578068139] [2021-11-25 18:38:26,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:38:26,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:38:26,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:38:26,839 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 18:38:26,839 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:38:26,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578068139] [2021-11-25 18:38:26,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578068139] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:38:26,842 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:38:26,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:38:26,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576238412] [2021-11-25 18:38:26,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:38:26,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:38:26,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:38:26,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:38:26,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:38:26,844 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 18:38:26,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:38:26,951 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2021-11-25 18:38:26,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:38:26,960 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2021-11-25 18:38:26,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:38:26,961 INFO L225 Difference]: With dead ends: 46 [2021-11-25 18:38:26,961 INFO L226 Difference]: Without dead ends: 46 [2021-11-25 18:38:26,962 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 18:38:26,964 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 6 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:38:26,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 56 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:38:26,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-25 18:38:26,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2021-11-25 18:38:26,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 39 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:38:26,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2021-11-25 18:38:26,988 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 5 [2021-11-25 18:38:26,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:38:26,988 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2021-11-25 18:38:26,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 18:38:26,989 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2021-11-25 18:38:26,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 18:38:26,990 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:38:26,990 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 18:38:26,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 18:38:26,991 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:38:26,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:38:26,991 INFO L85 PathProgramCache]: Analyzing trace with hash 896643063, now seen corresponding path program 1 times [2021-11-25 18:38:26,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:38:26,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735663651] [2021-11-25 18:38:26,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:38:26,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:38:27,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:38:27,067 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 18:38:27,068 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:38:27,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735663651] [2021-11-25 18:38:27,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735663651] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:38:27,069 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:38:27,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:38:27,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947409026] [2021-11-25 18:38:27,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:38:27,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:38:27,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:38:27,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:38:27,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:38:27,072 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:38:27,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:38:27,157 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2021-11-25 18:38:27,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:38:27,158 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-25 18:38:27,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:38:27,160 INFO L225 Difference]: With dead ends: 54 [2021-11-25 18:38:27,160 INFO L226 Difference]: Without dead ends: 54 [2021-11-25 18:38:27,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:38:27,162 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 78 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:38:27,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 29 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:38:27,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-25 18:38:27,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2021-11-25 18:38:27,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 38 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:38:27,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2021-11-25 18:38:27,182 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 6 [2021-11-25 18:38:27,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:38:27,182 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2021-11-25 18:38:27,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:38:27,183 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2021-11-25 18:38:27,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 18:38:27,183 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:38:27,184 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 18:38:27,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 18:38:27,184 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:38:27,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:38:27,185 INFO L85 PathProgramCache]: Analyzing trace with hash 896643064, now seen corresponding path program 1 times [2021-11-25 18:38:27,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:38:27,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383546187] [2021-11-25 18:38:27,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:38:27,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:38:27,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:38:27,282 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 18:38:27,282 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:38:27,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383546187] [2021-11-25 18:38:27,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383546187] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:38:27,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:38:27,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:38:27,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979109947] [2021-11-25 18:38:27,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:38:27,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:38:27,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:38:27,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:38:27,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:38:27,286 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:38:27,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:38:27,360 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2021-11-25 18:38:27,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:38:27,361 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-25 18:38:27,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:38:27,363 INFO L225 Difference]: With dead ends: 41 [2021-11-25 18:38:27,363 INFO L226 Difference]: Without dead ends: 41 [2021-11-25 18:38:27,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:38:27,366 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 77 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:38:27,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 20 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:38:27,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-25 18:38:27,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2021-11-25 18:38:27,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 37 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:38:27,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2021-11-25 18:38:27,380 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 6 [2021-11-25 18:38:27,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:38:27,381 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2021-11-25 18:38:27,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:38:27,381 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2021-11-25 18:38:27,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 18:38:27,390 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:38:27,391 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:38:27,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 18:38:27,391 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:38:27,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:38:27,392 INFO L85 PathProgramCache]: Analyzing trace with hash -877899620, now seen corresponding path program 1 times [2021-11-25 18:38:27,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:38:27,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990379807] [2021-11-25 18:38:27,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:38:27,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:38:27,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:38:27,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:38:27,472 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:38:27,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990379807] [2021-11-25 18:38:27,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990379807] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:38:27,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49467880] [2021-11-25 18:38:27,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:38:27,473 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:38:27,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:38:27,476 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:38:27,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:38:27,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:38:27,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 18:38:27,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:38:27,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:38:27,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:38:27,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:38:27,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49467880] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:38:27,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [299618938] [2021-11-25 18:38:27,835 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 18:38:27,845 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:38:27,851 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:38:27,858 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:38:27,859 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:38:27,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:27,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:28,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:38:28,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:28,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:38:28,129 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 18:38:28,142 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 18:38:28,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:28,240 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 25 treesize of output 13 [2021-11-25 18:38:28,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:28,257 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 25 treesize of output 13 [2021-11-25 18:38:28,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:28,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:28,288 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 26 treesize of output 28 [2021-11-25 18:38:28,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:28,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:38:28,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:28,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:38:28,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:28,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:28,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:28,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-25 18:38:28,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:28,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:28,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:28,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:28,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:28,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:38:28,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:28,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:28,700 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:38:28,701 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 2 case distinctions, treesize of input 290 treesize of output 272 [2021-11-25 18:38:28,767 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:38:28,767 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 284 treesize of output 291 [2021-11-25 18:38:28,833 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:38:28,834 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 278 treesize of output 285 [2021-11-25 18:38:29,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:29,244 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:38:29,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 311 treesize of output 312 [2021-11-25 18:38:29,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:29,344 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:38:29,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 292 treesize of output 293 [2021-11-25 18:38:29,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:29,431 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:38:29,432 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 301 treesize of output 302 [2021-11-25 18:38:30,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:30,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:30,050 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 18:38:30,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 301 treesize of output 294 [2021-11-25 18:38:30,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:30,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:30,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:30,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:30,096 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-25 18:38:30,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 383 treesize of output 368 [2021-11-25 18:38:30,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:30,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:30,145 INFO L354 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2021-11-25 18:38:30,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 379 treesize of output 372 [2021-11-25 18:38:30,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:30,394 INFO L354 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2021-11-25 18:38:30,395 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 8 case distinctions, treesize of input 380 treesize of output 383 [2021-11-25 18:38:30,760 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:38:30,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 284 treesize of output 291 [2021-11-25 18:38:30,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:30,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:30,794 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:38:30,795 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 2 case distinctions, treesize of input 284 treesize of output 266 [2021-11-25 18:38:30,875 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:38:30,876 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 278 treesize of output 285 [2021-11-25 18:38:31,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:31,436 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:38:31,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 714 treesize of output 709 [2021-11-25 18:38:31,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:31,526 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:38:31,527 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 702 treesize of output 703 [2021-11-25 18:38:31,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:31,618 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:38:31,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 683 treesize of output 652 [2021-11-25 18:38:32,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:32,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:32,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:32,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:32,366 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 18:38:32,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 301 treesize of output 286 [2021-11-25 18:38:32,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:32,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:32,423 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 18:38:32,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 297 treesize of output 290 [2021-11-25 18:38:32,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:32,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:32,472 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 18:38:32,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 309 treesize of output 302 [2021-11-25 18:38:32,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:38:32,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:38:32,709 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:38:35,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [299618938] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:38:35,587 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:38:35,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [3, 3, 3] total 11 [2021-11-25 18:38:35,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457968730] [2021-11-25 18:38:35,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:38:35,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 18:38:35,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:38:35,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 18:38:35,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-25 18:38:35,590 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 9 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 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 18:38:35,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:38:35,915 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2021-11-25 18:38:35,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 18:38:35,916 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 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 10 [2021-11-25 18:38:35,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:38:35,916 INFO L225 Difference]: With dead ends: 43 [2021-11-25 18:38:35,917 INFO L226 Difference]: Without dead ends: 43 [2021-11-25 18:38:35,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-25 18:38:35,919 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 44 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:38:35,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 67 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 18:38:35,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-25 18:38:35,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-11-25 18:38:35,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 25 states have (on average 1.8) internal successors, (45), 39 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:38:35,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2021-11-25 18:38:35,926 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 10 [2021-11-25 18:38:35,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:38:35,926 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2021-11-25 18:38:35,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 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 18:38:35,926 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2021-11-25 18:38:35,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 18:38:35,927 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:38:35,927 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:38:35,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:38:36,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:38:36,138 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:38:36,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:38:36,139 INFO L85 PathProgramCache]: Analyzing trace with hash -877896048, now seen corresponding path program 1 times [2021-11-25 18:38:36,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:38:36,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986359429] [2021-11-25 18:38:36,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:38:36,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:38:36,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:38:36,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:38:36,264 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:38:36,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986359429] [2021-11-25 18:38:36,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986359429] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:38:36,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439671172] [2021-11-25 18:38:36,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:38:36,265 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:38:36,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:38:36,278 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:38:36,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:38:36,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:38:36,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 18:38:36,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:38:36,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:38:36,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:38:36,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:38:36,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439671172] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:38:36,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1498922411] [2021-11-25 18:38:36,445 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 18:38:36,446 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:38:36,447 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:38:36,447 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:38:36,447 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:38:36,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:36,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:36,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:38:36,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:36,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:38:36,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:38:36,558 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 18:38:36,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:36,594 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 25 treesize of output 13 [2021-11-25 18:38:36,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:36,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 18:38:36,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:36,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:36,627 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 26 treesize of output 28 [2021-11-25 18:38:36,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:36,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:38:36,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:36,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:36,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:36,690 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 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-25 18:38:36,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:36,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:38:36,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:36,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:36,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:36,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:36,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:36,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:38:36,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:36,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:36,932 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:38:36,932 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 2 case distinctions, treesize of input 297 treesize of output 279 [2021-11-25 18:38:36,997 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:38:36,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 291 treesize of output 298 [2021-11-25 18:38:37,057 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:38:37,058 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 285 treesize of output 292 [2021-11-25 18:38:37,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:37,471 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:38:37,472 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 576 treesize of output 577 [2021-11-25 18:38:37,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:37,540 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:38:37,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 557 treesize of output 538 [2021-11-25 18:38:37,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:37,613 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:38:37,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 562 treesize of output 563 [2021-11-25 18:38:38,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:38,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:38,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:38,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:38,231 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 18:38:38,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 301 treesize of output 286 [2021-11-25 18:38:38,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:38,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:38,279 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 18:38:38,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 297 treesize of output 290 [2021-11-25 18:38:38,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:38,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:38,344 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 18:38:38,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 309 treesize of output 302 [2021-11-25 18:38:38,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:38,522 INFO L354 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2021-11-25 18:38:38,522 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 8 case distinctions, treesize of input 370 treesize of output 373 [2021-11-25 18:38:38,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:38,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:38,775 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:38:38,776 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 2 case distinctions, treesize of input 297 treesize of output 279 [2021-11-25 18:38:38,826 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:38:38,827 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 291 treesize of output 298 [2021-11-25 18:38:38,879 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:38:38,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 285 treesize of output 292 [2021-11-25 18:38:39,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:39,125 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:38:39,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 318 treesize of output 319 [2021-11-25 18:38:39,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:39,188 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:38:39,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 299 treesize of output 300 [2021-11-25 18:38:39,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:39,238 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:38:39,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 308 treesize of output 309 [2021-11-25 18:38:39,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:39,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:39,631 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 18:38:39,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 301 treesize of output 294 [2021-11-25 18:38:39,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:39,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:39,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:39,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:39,704 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 18:38:39,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 317 treesize of output 302 [2021-11-25 18:38:39,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:39,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:39,750 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 18:38:39,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 313 treesize of output 306 [2021-11-25 18:38:39,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:38:39,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:38:39,966 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:38:42,398 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '763#(and (= |ULTIMATE.start_main_~s~0#1.base| |ULTIMATE.start_sll_create_#res#1.base|) (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~new_data~0#1| |ULTIMATE.start_sll_update_at_#in~data#1|) (= |ULTIMATE.start_sll_update_at_~head#1.base| |ULTIMATE.start_sll_update_at_#in~head#1.base|) (= |ULTIMATE.start_sll_create_~head~0#1.base| |ULTIMATE.start_sll_create_#res#1.base|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (= |ULTIMATE.start_sll_update_at_~index#1| |ULTIMATE.start_sll_update_at_#in~index#1|) (= |ULTIMATE.start_sll_update_at_#in~head#1.offset| |ULTIMATE.start_main_~s~0#1.offset|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (= |ULTIMATE.start_sll_update_at_#in~head#1.base| |ULTIMATE.start_main_~s~0#1.base|) (= |ULTIMATE.start_sll_update_at_#in~head#1.offset| |ULTIMATE.start_sll_update_at_~head#1.offset|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (= |ULTIMATE.start_sll_update_at_~data#1| |ULTIMATE.start_sll_update_at_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (= (+ |ULTIMATE.start_main_~len~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~new_data~0#1|) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_sll_create_#res#1.offset| |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.offset| 0) (= |ULTIMATE.start_sll_create_#res#1.offset| |ULTIMATE.start_main_~s~0#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (not (= (select |#valid| |ULTIMATE.start_sll_update_at_~head#1.base|) 1)) (= |ULTIMATE.start_sll_update_at_#in~index#1| |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2021-11-25 18:38:42,398 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:38:42,398 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:38:42,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2021-11-25 18:38:42,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169896109] [2021-11-25 18:38:42,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:38:42,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:38:42,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:38:42,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:38:42,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-11-25 18:38:42,401 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 18:38:42,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:38:42,443 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2021-11-25 18:38:42,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:38:42,443 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 10 [2021-11-25 18:38:42,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:38:42,444 INFO L225 Difference]: With dead ends: 45 [2021-11-25 18:38:42,445 INFO L226 Difference]: Without dead ends: 45 [2021-11-25 18:38:42,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-11-25 18:38:42,446 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 8 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:38:42,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 54 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:38:42,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-25 18:38:42,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-11-25 18:38:42,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 44 states have internal predecessors, (50), 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 18:38:42,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2021-11-25 18:38:42,455 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 10 [2021-11-25 18:38:42,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:38:42,455 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2021-11-25 18:38:42,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 18:38:42,456 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2021-11-25 18:38:42,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-25 18:38:42,456 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:38:42,456 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-25 18:38:42,481 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-25 18:38:42,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:38:42,657 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:38:42,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:38:42,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1276636301, now seen corresponding path program 2 times [2021-11-25 18:38:42,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:38:42,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153414290] [2021-11-25 18:38:42,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:38:42,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:38:42,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:38:42,815 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 18:38:42,815 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:38:42,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153414290] [2021-11-25 18:38:42,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153414290] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:38:42,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:38:42,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 18:38:42,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192066780] [2021-11-25 18:38:42,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:38:42,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:38:42,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:38:42,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:38:42,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:38:42,819 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:38:42,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:38:42,963 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2021-11-25 18:38:42,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:38:42,964 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-25 18:38:42,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:38:42,966 INFO L225 Difference]: With dead ends: 62 [2021-11-25 18:38:42,967 INFO L226 Difference]: Without dead ends: 62 [2021-11-25 18:38:42,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-25 18:38:42,968 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 196 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:38:42,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 44 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:38:42,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-25 18:38:42,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 48. [2021-11-25 18:38:42,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 33 states have (on average 1.696969696969697) internal successors, (56), 47 states have internal predecessors, (56), 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 18:38:42,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2021-11-25 18:38:42,988 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 15 [2021-11-25 18:38:42,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:38:42,989 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2021-11-25 18:38:42,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:38:42,989 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2021-11-25 18:38:42,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-25 18:38:42,993 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:38:42,993 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-25 18:38:42,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 18:38:42,994 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:38:42,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:38:42,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1276636300, now seen corresponding path program 1 times [2021-11-25 18:38:42,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:38:42,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509673827] [2021-11-25 18:38:42,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:38:42,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:38:43,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:38:43,157 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:38:43,157 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:38:43,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509673827] [2021-11-25 18:38:43,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509673827] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:38:43,158 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:38:43,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 18:38:43,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984524752] [2021-11-25 18:38:43,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:38:43,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:38:43,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:38:43,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:38:43,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:38:43,160 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:38:43,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:38:43,341 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2021-11-25 18:38:43,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:38:43,344 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-25 18:38:43,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:38:43,346 INFO L225 Difference]: With dead ends: 72 [2021-11-25 18:38:43,346 INFO L226 Difference]: Without dead ends: 72 [2021-11-25 18:38:43,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-25 18:38:43,348 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 294 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:38:43,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 33 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:38:43,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-25 18:38:43,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 48. [2021-11-25 18:38:43,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 47 states have internal predecessors, (54), 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 18:38:43,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2021-11-25 18:38:43,354 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 15 [2021-11-25 18:38:43,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:38:43,355 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2021-11-25 18:38:43,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:38:43,355 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2021-11-25 18:38:43,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-25 18:38:43,356 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:38:43,356 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:38:43,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 18:38:43,357 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:38:43,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:38:43,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1752066666, now seen corresponding path program 1 times [2021-11-25 18:38:43,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:38:43,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126325860] [2021-11-25 18:38:43,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:38:43,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:38:43,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:38:43,424 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 18:38:43,424 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:38:43,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126325860] [2021-11-25 18:38:43,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126325860] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:38:43,425 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:38:43,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:38:43,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717915136] [2021-11-25 18:38:43,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:38:43,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:38:43,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:38:43,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:38:43,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:38:43,427 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:38:43,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:38:43,599 INFO L93 Difference]: Finished difference Result 133 states and 146 transitions. [2021-11-25 18:38:43,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:38:43,600 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-25 18:38:43,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:38:43,601 INFO L225 Difference]: With dead ends: 133 [2021-11-25 18:38:43,601 INFO L226 Difference]: Without dead ends: 133 [2021-11-25 18:38:43,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:38:43,603 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 151 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:38:43,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 60 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:38:43,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-25 18:38:43,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 51. [2021-11-25 18:38:43,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 50 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:38:43,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2021-11-25 18:38:43,620 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 19 [2021-11-25 18:38:43,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:38:43,620 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2021-11-25 18:38:43,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:38:43,621 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2021-11-25 18:38:43,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-25 18:38:43,622 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:38:43,622 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:38:43,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 18:38:43,623 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:38:43,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:38:43,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1752066665, now seen corresponding path program 1 times [2021-11-25 18:38:43,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:38:43,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357249712] [2021-11-25 18:38:43,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:38:43,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:38:43,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:38:43,743 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 18:38:43,744 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:38:43,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357249712] [2021-11-25 18:38:43,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357249712] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:38:43,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851984974] [2021-11-25 18:38:43,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:38:43,745 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:38:43,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:38:43,746 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:38:43,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 18:38:43,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:38:43,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 18:38:43,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:38:43,978 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 18:38:43,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:38:44,037 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 18:38:44,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851984974] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:38:44,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1263822131] [2021-11-25 18:38:44,041 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-25 18:38:44,041 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:38:44,041 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:38:44,042 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:38:44,042 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:38:44,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:44,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:44,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:38:44,114 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 18:38:44,125 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 18:38:44,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:44,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:38:44,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:44,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 18:38:44,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:44,203 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 25 treesize of output 13 [2021-11-25 18:38:44,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:44,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:44,218 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 26 treesize of output 28 [2021-11-25 18:38:44,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:44,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:38:44,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:44,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:38:44,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:44,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:44,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:44,322 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 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-25 18:38:44,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:44,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:44,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:44,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:44,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:44,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:38:44,511 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:38:44,511 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 284 treesize of output 291 [2021-11-25 18:38:44,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:44,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:44,570 INFO L354 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2021-11-25 18:38:44,571 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 3 case distinctions, treesize of input 284 treesize of output 276 [2021-11-25 18:38:44,620 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:38:44,620 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 274 treesize of output 281 [2021-11-25 18:38:44,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:44,866 INFO L354 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2021-11-25 18:38:44,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 308 treesize of output 313 [2021-11-25 18:38:44,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:44,943 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:38:44,943 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 317 treesize of output 318 [2021-11-25 18:38:44,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:45,011 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:38:45,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 311 treesize of output 312 [2021-11-25 18:38:45,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:45,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:45,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:45,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:45,585 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 18:38:45,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 418 treesize of output 395 [2021-11-25 18:38:45,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:45,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:45,636 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 18:38:45,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 414 treesize of output 407 [2021-11-25 18:38:45,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:45,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:45,680 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 18:38:45,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 432 treesize of output 425 [2021-11-25 18:38:45,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:45,888 INFO L354 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2021-11-25 18:38:45,888 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 8 case distinctions, treesize of input 370 treesize of output 373 [2021-11-25 18:38:46,204 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:38:46,205 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 284 treesize of output 291 [2021-11-25 18:38:46,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:46,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:46,274 INFO L354 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2021-11-25 18:38:46,274 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 3 case distinctions, treesize of input 284 treesize of output 276 [2021-11-25 18:38:46,326 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:38:46,326 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 274 treesize of output 281 [2021-11-25 18:38:46,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:46,855 INFO L354 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2021-11-25 18:38:46,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 711 treesize of output 684 [2021-11-25 18:38:46,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:46,914 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:38:46,915 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 712 treesize of output 707 [2021-11-25 18:38:46,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:46,977 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:38:46,977 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 700 treesize of output 701 [2021-11-25 18:38:47,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:47,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:47,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:47,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:47,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:47,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:47,737 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 18:38:47,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 432 treesize of output 409 [2021-11-25 18:38:47,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:47,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:47,782 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-25 18:38:47,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 428 treesize of output 421 [2021-11-25 18:38:47,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:47,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:47,831 INFO L354 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2021-11-25 18:38:47,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 506 treesize of output 499 [2021-11-25 18:38:48,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 18:38:48,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:38:48,062 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 11 treesize of output 7 [2021-11-25 18:38:48,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 18:38:48,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 18:38:48,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 18:38:48,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:38:48,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:38:48,249 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:38:50,922 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1434#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_sll_get_data_at_#in~head#1.offset| |ULTIMATE.start_sll_get_data_at_~head#1.offset|) (= |ULTIMATE.start_sll_get_data_at_#in~index#1| |ULTIMATE.start_main_~i~0#1|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (< (select |#length| |ULTIMATE.start_sll_get_data_at_~head#1.base|) (+ |ULTIMATE.start_sll_get_data_at_~head#1.offset| 4)) (= (+ |ULTIMATE.start_main_~len~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~expected~0#1|) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (= |ULTIMATE.start_sll_get_data_at_#in~head#1.offset| |ULTIMATE.start_main_~s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (= |ULTIMATE.start_sll_get_data_at_#in~head#1.base| |ULTIMATE.start_main_~s~0#1.base|) (= |ULTIMATE.start_sll_get_data_at_#in~index#1| |ULTIMATE.start_sll_get_data_at_~index#1|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (= |ULTIMATE.start_sll_get_data_at_#in~head#1.base| |ULTIMATE.start_sll_get_data_at_~head#1.base|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2021-11-25 18:38:50,922 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:38:50,922 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:38:50,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2021-11-25 18:38:50,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186022] [2021-11-25 18:38:50,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:38:50,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 18:38:50,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:38:50,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 18:38:50,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2021-11-25 18:38:50,924 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 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 18:38:50,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:38:50,986 INFO L93 Difference]: Finished difference Result 68 states and 81 transitions. [2021-11-25 18:38:50,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:38:50,986 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-25 18:38:50,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:38:50,987 INFO L225 Difference]: With dead ends: 68 [2021-11-25 18:38:50,987 INFO L226 Difference]: Without dead ends: 68 [2021-11-25 18:38:50,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2021-11-25 18:38:50,989 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 110 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:38:50,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 76 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:38:50,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-25 18:38:50,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2021-11-25 18:38:50,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 47 states have (on average 1.702127659574468) internal successors, (80), 61 states have internal predecessors, (80), 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 18:38:50,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 80 transitions. [2021-11-25 18:38:50,995 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 80 transitions. Word has length 19 [2021-11-25 18:38:50,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:38:50,995 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 80 transitions. [2021-11-25 18:38:50,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 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 18:38:50,996 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 80 transitions. [2021-11-25 18:38:50,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-25 18:38:50,997 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:38:50,997 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-25 18:38:51,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 18:38:51,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-25 18:38:51,210 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:38:51,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:38:51,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1407041625, now seen corresponding path program 1 times [2021-11-25 18:38:51,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:38:51,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206166546] [2021-11-25 18:38:51,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:38:51,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:38:51,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:38:51,290 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 18:38:51,290 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:38:51,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206166546] [2021-11-25 18:38:51,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206166546] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:38:51,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529121616] [2021-11-25 18:38:51,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:38:51,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:38:51,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:38:51,292 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:38:51,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 18:38:51,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:38:51,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 18:38:51,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:38:51,485 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 18:38:51,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:38:51,523 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 18:38:51,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529121616] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:38:51,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [883391245] [2021-11-25 18:38:51,527 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 18:38:51,528 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:38:51,528 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:38:51,528 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:38:51,529 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:38:51,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:51,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:51,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:38:51,600 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 18:38:51,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:51,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:38:51,623 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 18:38:51,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:51,658 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 25 treesize of output 13 [2021-11-25 18:38:51,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:51,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:51,678 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 26 treesize of output 28 [2021-11-25 18:38:51,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:51,692 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 25 treesize of output 13 [2021-11-25 18:38:51,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:51,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:51,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:51,732 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 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-25 18:38:51,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:51,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:38:51,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:51,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:38:51,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:51,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:51,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:51,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:51,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:51,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:38:51,976 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:38:51,977 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 291 treesize of output 298 [2021-11-25 18:38:51,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:51,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,006 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:38:52,007 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 2 case distinctions, treesize of input 291 treesize of output 273 [2021-11-25 18:38:52,062 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:38:52,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 285 treesize of output 292 [2021-11-25 18:38:52,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,284 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:38:52,284 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 318 treesize of output 319 [2021-11-25 18:38:52,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,351 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:38:52,352 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 312 treesize of output 313 [2021-11-25 18:38:52,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:52,413 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:38:52,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 293 treesize of output 294 [2021-11-25 18:38:52,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:52,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:52,757 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 18:38:52,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 305 treesize of output 290 [2021-11-25 18:38:52,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:52,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:52,820 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 18:38:52,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 301 treesize of output 294 [2021-11-25 18:38:52,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:52,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:52,858 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 18:38:52,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 313 treesize of output 306 [2021-11-25 18:38:52,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:53,039 INFO L354 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2021-11-25 18:38:53,040 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 8 case distinctions, treesize of input 380 treesize of output 383 [2021-11-25 18:38:53,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:53,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:53,252 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:38:53,252 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 2 case distinctions, treesize of input 297 treesize of output 279 [2021-11-25 18:38:53,288 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:38:53,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 291 treesize of output 298 [2021-11-25 18:38:53,330 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:38:53,330 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 285 treesize of output 292 [2021-11-25 18:38:53,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:53,611 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:38:53,611 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 576 treesize of output 577 [2021-11-25 18:38:53,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:53,696 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:38:53,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 557 treesize of output 538 [2021-11-25 18:38:53,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:53,763 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:38:53,764 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 562 treesize of output 563 [2021-11-25 18:38:54,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:54,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:54,158 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 18:38:54,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 414 treesize of output 407 [2021-11-25 18:38:54,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:54,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:54,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:54,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:54,191 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-25 18:38:54,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 496 treesize of output 473 [2021-11-25 18:38:54,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:54,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:38:54,225 INFO L354 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2021-11-25 18:38:54,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 492 treesize of output 485 [2021-11-25 18:38:54,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 18:38:54,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 18:38:54,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 18:38:54,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:38:54,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 18:38:54,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 18:38:54,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:38:54,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 18:38:54,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 18:38:54,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:38:54,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:38:54,876 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:38:57,696 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1696#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_update_at_#in~head#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= 0 |ULTIMATE.start_sll_update_at_#in~index#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 2 |ULTIMATE.start_sll_update_at_~data#1|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_update_at_#in~head#1.offset| 0) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 2 |ULTIMATE.start_sll_update_at_#in~data#1|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 2 |ULTIMATE.start_main_~new_data~0#1|) (< 0 |ULTIMATE.start_sll_update_at_~index#1|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (not (= (select |#valid| |ULTIMATE.start_sll_update_at_~head#1.base|) 1)) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2021-11-25 18:38:57,696 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:38:57,696 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:38:57,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2021-11-25 18:38:57,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206806939] [2021-11-25 18:38:57,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:38:57,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:38:57,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:38:57,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:38:57,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-11-25 18:38:57,699 INFO L87 Difference]: Start difference. First operand 62 states and 80 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:38:57,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:38:57,805 INFO L93 Difference]: Finished difference Result 88 states and 106 transitions. [2021-11-25 18:38:57,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:38:57,806 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-25 18:38:57,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:38:57,808 INFO L225 Difference]: With dead ends: 88 [2021-11-25 18:38:57,808 INFO L226 Difference]: Without dead ends: 88 [2021-11-25 18:38:57,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-11-25 18:38:57,810 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 82 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:38:57,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 92 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:38:57,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-25 18:38:57,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 65. [2021-11-25 18:38:57,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 50 states have (on average 1.68) internal successors, (84), 64 states have internal predecessors, (84), 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 18:38:57,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 84 transitions. [2021-11-25 18:38:57,818 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 84 transitions. Word has length 20 [2021-11-25 18:38:57,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:38:57,818 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 84 transitions. [2021-11-25 18:38:57,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:38:57,819 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 84 transitions. [2021-11-25 18:38:57,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-25 18:38:57,820 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:38:57,820 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-25 18:38:57,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 18:38:58,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-25 18:38:58,034 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:38:58,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:38:58,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1407045197, now seen corresponding path program 1 times [2021-11-25 18:38:58,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:38:58,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192865657] [2021-11-25 18:38:58,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:38:58,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:38:58,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:38:58,338 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:38:58,338 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:38:58,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192865657] [2021-11-25 18:38:58,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192865657] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:38:58,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179840629] [2021-11-25 18:38:58,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:38:58,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:38:58,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:38:58,341 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:38:58,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 18:38:58,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:38:58,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-25 18:38:58,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:38:58,523 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:38:58,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-11-25 18:38:58,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:38:58,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:38:58,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-25 18:38:58,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-11-25 18:38:58,810 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:38:58,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:39:05,692 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:39:05,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179840629] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:39:05,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1077334492] [2021-11-25 18:39:05,695 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 18:39:05,695 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:39:05,695 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:39:05,696 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:39:05,696 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:39:05,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:05,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:05,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:39:05,771 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 18:39:05,782 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 13 treesize of output 9 [2021-11-25 18:39:05,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:05,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:39:05,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:05,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:05,829 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 26 treesize of output 28 [2021-11-25 18:39:05,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:05,846 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 25 treesize of output 13 [2021-11-25 18:39:05,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:05,860 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 25 treesize of output 13 [2021-11-25 18:39:05,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:05,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:05,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:05,910 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 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-25 18:39:05,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:05,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:39:05,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:05,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:39:05,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:05,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:05,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:05,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:05,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:05,978 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 18:39:06,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:06,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:06,126 INFO L354 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2021-11-25 18:39:06,126 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 3 case distinctions, treesize of input 290 treesize of output 282 [2021-11-25 18:39:06,182 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:39:06,182 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 280 treesize of output 287 [2021-11-25 18:39:06,233 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:39:06,234 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 274 treesize of output 281 [2021-11-25 18:39:06,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:06,752 INFO L354 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2021-11-25 18:39:06,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 570 treesize of output 559 [2021-11-25 18:39:06,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:06,837 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:39:06,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 579 treesize of output 574 [2021-11-25 18:39:06,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:06,910 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:39:06,911 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 567 treesize of output 562 [2021-11-25 18:39:07,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:07,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:07,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:07,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:07,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:07,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:07,414 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 18:39:07,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 440 treesize of output 417 [2021-11-25 18:39:07,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:07,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:07,461 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-25 18:39:07,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 436 treesize of output 429 [2021-11-25 18:39:07,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:07,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:07,506 INFO L354 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2021-11-25 18:39:07,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 520 treesize of output 513 [2021-11-25 18:39:07,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:07,719 INFO L354 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2021-11-25 18:39:07,720 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 8 case distinctions, treesize of input 432 treesize of output 435 [2021-11-25 18:39:07,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:07,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:08,034 INFO L354 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2021-11-25 18:39:08,035 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 3 case distinctions, treesize of input 290 treesize of output 282 [2021-11-25 18:39:08,081 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:39:08,081 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 280 treesize of output 287 [2021-11-25 18:39:08,121 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:39:08,122 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 274 treesize of output 281 [2021-11-25 18:39:08,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:08,686 INFO L354 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2021-11-25 18:39:08,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 971 treesize of output 924 [2021-11-25 18:39:08,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:08,768 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:39:08,768 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 968 treesize of output 963 [2021-11-25 18:39:08,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:08,838 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:39:08,839 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 956 treesize of output 951 [2021-11-25 18:39:09,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:09,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:09,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:09,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:09,622 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 18:39:09,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 414 treesize of output 391 [2021-11-25 18:39:09,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:09,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:09,668 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 18:39:09,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 410 treesize of output 403 [2021-11-25 18:39:09,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:09,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:09,708 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 18:39:09,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 428 treesize of output 421 [2021-11-25 18:39:09,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:39:09,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:39:09,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:39:10,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:39:10,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:39:10,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:39:10,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:39:10,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:39:10,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:39:10,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:39:10,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:39:10,329 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:39:13,179 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2002#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_update_at_#in~head#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= 0 |ULTIMATE.start_sll_update_at_#in~index#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 2 |ULTIMATE.start_sll_update_at_~data#1|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= |ULTIMATE.start_sll_update_at_~index#1| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_update_at_#in~head#1.offset| 0) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 2 |ULTIMATE.start_sll_update_at_#in~data#1|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 2 |ULTIMATE.start_main_~new_data~0#1|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (not (= (select |#valid| |ULTIMATE.start_sll_update_at_~head#1.base|) 1)) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2021-11-25 18:39:13,179 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:39:13,179 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:39:13,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 22 [2021-11-25 18:39:13,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943348347] [2021-11-25 18:39:13,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:39:13,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-25 18:39:13,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:39:13,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-25 18:39:13,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=935, Unknown=1, NotChecked=0, Total=1056 [2021-11-25 18:39:13,182 INFO L87 Difference]: Start difference. First operand 65 states and 84 transitions. Second operand has 23 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 23 states have internal predecessors, (47), 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 18:39:13,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:39:13,825 INFO L93 Difference]: Finished difference Result 131 states and 168 transitions. [2021-11-25 18:39:13,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 18:39:13,826 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-25 18:39:13,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:39:13,828 INFO L225 Difference]: With dead ends: 131 [2021-11-25 18:39:13,828 INFO L226 Difference]: Without dead ends: 131 [2021-11-25 18:39:13,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=256, Invalid=1383, Unknown=1, NotChecked=0, Total=1640 [2021-11-25 18:39:13,830 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 569 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 569 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:39:13,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [569 Valid, 167 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 375 Invalid, 0 Unknown, 34 Unchecked, 0.4s Time] [2021-11-25 18:39:13,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-25 18:39:13,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 72. [2021-11-25 18:39:13,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 57 states have (on average 1.6842105263157894) internal successors, (96), 71 states have internal predecessors, (96), 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 18:39:13,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 96 transitions. [2021-11-25 18:39:13,836 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 96 transitions. Word has length 20 [2021-11-25 18:39:13,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:39:13,836 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 96 transitions. [2021-11-25 18:39:13,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 23 states have internal predecessors, (47), 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 18:39:13,837 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 96 transitions. [2021-11-25 18:39:13,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-25 18:39:13,837 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:39:13,837 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-25 18:39:13,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 18:39:14,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:39:14,066 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:39:14,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:39:14,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1407045198, now seen corresponding path program 1 times [2021-11-25 18:39:14,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:39:14,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18164103] [2021-11-25 18:39:14,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:39:14,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:39:14,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:39:14,458 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:39:14,458 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:39:14,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18164103] [2021-11-25 18:39:14,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18164103] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:39:14,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757071416] [2021-11-25 18:39:14,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:39:14,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:39:14,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:39:14,460 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:39:14,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 18:39:14,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:39:14,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-25 18:39:14,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:39:14,711 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:39:14,712 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 14 treesize of output 20 [2021-11-25 18:39:14,733 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:39:14,734 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 18:39:14,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:39:14,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:39:15,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:15,010 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 40 treesize of output 33 [2021-11-25 18:39:15,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:15,015 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 41 treesize of output 34 [2021-11-25 18:39:15,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 21 [2021-11-25 18:39:15,084 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 32 treesize of output 14 [2021-11-25 18:39:15,118 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:39:15,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:39:17,439 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_37| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_37|) (and (forall ((v_ArrVal_620 Int)) (<= 0 (select (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_37| v_ArrVal_620) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)))) (forall ((v_ArrVal_620 Int) (v_ArrVal_617 Int)) (let ((.cse0 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (<= (+ 4 (select (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_37| v_ArrVal_620) .cse0)) (select |c_#length| (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_37| v_ArrVal_617) .cse0)))))))) is different from false [2021-11-25 18:39:19,483 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_37| Int)) (or (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_37|) (and (forall ((v_ArrVal_620 Int) (v_ArrVal_617 Int)) (let ((.cse0 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4))) (<= (+ (select (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_37| v_ArrVal_620) .cse0) 4) (select |c_#length| (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_37| v_ArrVal_617) .cse0))))) (forall ((v_ArrVal_620 Int)) (<= 0 (select (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_37| v_ArrVal_620) (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4))))))) is different from false [2021-11-25 18:39:19,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 51 [2021-11-25 18:39:19,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2021-11-25 18:39:19,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:19,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:19,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:19,701 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 15 [2021-11-25 18:39:19,710 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 18:39:19,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2021-11-25 18:39:19,727 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-25 18:39:19,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757071416] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:39:19,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [407227937] [2021-11-25 18:39:19,730 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 18:39:19,730 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:39:19,731 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:39:19,731 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:39:19,731 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:39:19,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:19,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:19,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:39:19,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:19,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:39:19,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:39:19,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:39:19,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:19,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 18:39:19,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:19,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:19,868 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 26 treesize of output 28 [2021-11-25 18:39:19,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:19,882 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 25 treesize of output 13 [2021-11-25 18:39:19,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:19,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:19,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:19,922 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 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-25 18:39:19,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:19,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:39:19,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:19,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:39:19,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:19,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:19,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:19,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:19,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:19,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:39:20,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:20,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:20,117 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:39:20,118 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 2 case distinctions, treesize of input 297 treesize of output 279 [2021-11-25 18:39:20,171 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:39:20,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 291 treesize of output 298 [2021-11-25 18:39:20,229 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:39:20,230 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 285 treesize of output 292 [2021-11-25 18:39:20,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:20,572 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:39:20,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 576 treesize of output 577 [2021-11-25 18:39:20,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:20,651 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:39:20,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 557 treesize of output 538 [2021-11-25 18:39:20,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:20,754 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:39:20,754 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 562 treesize of output 563 [2021-11-25 18:39:21,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:21,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:21,260 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-25 18:39:21,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 322 treesize of output 315 [2021-11-25 18:39:21,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:21,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:21,291 INFO L354 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2021-11-25 18:39:21,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 406 treesize of output 399 [2021-11-25 18:39:21,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:21,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:21,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:21,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:21,323 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-25 18:39:21,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 452 treesize of output 437 [2021-11-25 18:39:21,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:21,517 INFO L354 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2021-11-25 18:39:21,518 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 8 case distinctions, treesize of input 437 treesize of output 432 [2021-11-25 18:39:21,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:21,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:21,822 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:39:21,822 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 2 case distinctions, treesize of input 297 treesize of output 279 [2021-11-25 18:39:21,876 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:39:21,877 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 291 treesize of output 298 [2021-11-25 18:39:21,928 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:39:21,929 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 285 treesize of output 292 [2021-11-25 18:39:22,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:22,140 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:39:22,141 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 318 treesize of output 319 [2021-11-25 18:39:22,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:22,211 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:39:22,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 299 treesize of output 300 [2021-11-25 18:39:22,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:22,279 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:39:22,280 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 308 treesize of output 309 [2021-11-25 18:39:22,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:22,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:22,662 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-25 18:39:22,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 320 treesize of output 313 [2021-11-25 18:39:22,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:22,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:22,710 INFO L354 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2021-11-25 18:39:22,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 404 treesize of output 397 [2021-11-25 18:39:22,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:22,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:22,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:22,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:22,748 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-25 18:39:22,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 450 treesize of output 435 [2021-11-25 18:39:22,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:39:22,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:39:22,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:39:23,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:39:23,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:39:23,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:39:23,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:39:23,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:39:23,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:39:23,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:39:23,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:39:23,411 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:39:26,707 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2379#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (or (< (select |#length| |ULTIMATE.start_sll_update_at_~head#1.base|) (+ 4 |ULTIMATE.start_sll_update_at_~head#1.offset|)) (< |ULTIMATE.start_sll_update_at_~head#1.offset| 0)) (<= 0 |ULTIMATE.start_sll_update_at_#in~head#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= 0 |ULTIMATE.start_sll_update_at_#in~index#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 2 |ULTIMATE.start_sll_update_at_~data#1|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= |ULTIMATE.start_sll_update_at_~index#1| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_update_at_#in~head#1.offset| 0) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 2 |ULTIMATE.start_sll_update_at_#in~data#1|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 2 |ULTIMATE.start_main_~new_data~0#1|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2021-11-25 18:39:26,708 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:39:26,708 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:39:26,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 30 [2021-11-25 18:39:26,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367225838] [2021-11-25 18:39:26,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:39:26,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-25 18:39:26,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:39:26,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-25 18:39:26,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1345, Unknown=2, NotChecked=150, Total=1640 [2021-11-25 18:39:26,712 INFO L87 Difference]: Start difference. First operand 72 states and 96 transitions. Second operand has 31 states, 30 states have (on average 1.8) internal successors, (54), 31 states have internal predecessors, (54), 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 18:39:28,214 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse3 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|)) (.cse4 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|)) (.cse5 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4))) (let ((.cse0 (select .cse4 .cse5)) (.cse1 (select .cse3 .cse5))) (and (= (select |c_#valid| |c_ULTIMATE.start_node_create_~temp~0#1.base|) 1) (<= 8 (select |c_#length| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|)) (= (select |c_#valid| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 1) (= |c_ULTIMATE.start_node_create_~temp~0#1.offset| 0) (<= 0 .cse0) (not (= |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse1)) (= |c_ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= 8 (select |c_#length| |c_ULTIMATE.start_node_create_~temp~0#1.base|)) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_37| Int)) (or (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_37|) (and (forall ((v_ArrVal_620 Int) (v_ArrVal_617 Int)) (let ((.cse2 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4))) (<= (+ (select (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_37| v_ArrVal_620) .cse2) 4) (select |c_#length| (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_37| v_ArrVal_617) .cse2))))) (forall ((v_ArrVal_620 Int)) (<= 0 (select (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_37| v_ArrVal_620) (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4))))))) (<= 8 (select |c_#length| (select .cse3 4))) (<= (+ .cse0 8) (select |c_#length| .cse1)) (= |c_ULTIMATE.start_sll_create_~new_head~0#1.offset| 0) (= (select .cse4 4) 0) (= (select |c_#valid| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) 1) (<= 8 (select |c_#length| |c_ULTIMATE.start_sll_create_~head~0#1.base|))))) is different from false [2021-11-25 18:39:28,955 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse4 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|)) (.cse1 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|)) (.cse5 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (let ((.cse0 (select .cse1 .cse5)) (.cse3 (select .cse4 .cse5))) (and (<= 0 .cse0) (= 0 (select .cse1 4)) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_37| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_37|) (and (forall ((v_ArrVal_620 Int)) (<= 0 (select (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_37| v_ArrVal_620) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)))) (forall ((v_ArrVal_620 Int) (v_ArrVal_617 Int)) (let ((.cse2 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (<= (+ 4 (select (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_37| v_ArrVal_620) .cse2)) (select |c_#length| (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_37| v_ArrVal_617) .cse2)))))))) (<= (+ 8 .cse0) (select |c_#length| .cse3)) (not (= .cse3 |c_ULTIMATE.start_main_~s~0#1.base|)) (<= 8 (select |c_#length| (select .cse4 4))) (= |c_ULTIMATE.start_main_~s~0#1.offset| 0)))) is different from false [2021-11-25 18:39:29,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:39:29,827 INFO L93 Difference]: Finished difference Result 166 states and 222 transitions. [2021-11-25 18:39:29,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-25 18:39:29,828 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.8) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-25 18:39:29,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:39:29,829 INFO L225 Difference]: With dead ends: 166 [2021-11-25 18:39:29,829 INFO L226 Difference]: Without dead ends: 166 [2021-11-25 18:39:29,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=269, Invalid=2095, Unknown=4, NotChecked=388, Total=2756 [2021-11-25 18:39:29,832 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 428 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 256 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:39:29,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [428 Valid, 422 Invalid, 968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 674 Invalid, 0 Unknown, 256 Unchecked, 0.6s Time] [2021-11-25 18:39:29,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-25 18:39:29,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 77. [2021-11-25 18:39:29,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 62 states have (on average 1.6774193548387097) internal successors, (104), 76 states have internal predecessors, (104), 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 18:39:29,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 104 transitions. [2021-11-25 18:39:29,838 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 104 transitions. Word has length 20 [2021-11-25 18:39:29,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:39:29,838 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 104 transitions. [2021-11-25 18:39:29,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.8) internal successors, (54), 31 states have internal predecessors, (54), 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 18:39:29,839 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 104 transitions. [2021-11-25 18:39:29,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-25 18:39:29,840 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:39:29,840 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-25 18:39:29,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 18:39:30,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-25 18:39:30,050 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:39:30,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:39:30,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1734910987, now seen corresponding path program 2 times [2021-11-25 18:39:30,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:39:30,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513556501] [2021-11-25 18:39:30,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:39:30,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:39:30,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:39:30,152 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 18:39:30,152 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:39:30,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513556501] [2021-11-25 18:39:30,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513556501] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:39:30,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290780307] [2021-11-25 18:39:30,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:39:30,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:39:30,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:39:30,155 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:39:30,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 18:39:30,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-25 18:39:30,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:39:30,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-25 18:39:30,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:39:30,389 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 18:39:30,389 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:39:30,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290780307] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:39:30,389 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:39:30,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2021-11-25 18:39:30,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051206977] [2021-11-25 18:39:30,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:39:30,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:39:30,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:39:30,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:39:30,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-25 18:39:30,392 INFO L87 Difference]: Start difference. First operand 77 states and 104 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 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 18:39:30,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:39:30,539 INFO L93 Difference]: Finished difference Result 95 states and 120 transitions. [2021-11-25 18:39:30,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:39:30,540 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-25 18:39:30,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:39:30,541 INFO L225 Difference]: With dead ends: 95 [2021-11-25 18:39:30,541 INFO L226 Difference]: Without dead ends: 95 [2021-11-25 18:39:30,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-25 18:39:30,542 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 181 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:39:30,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 46 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:39:30,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-25 18:39:30,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 77. [2021-11-25 18:39:30,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 62 states have (on average 1.6129032258064515) internal successors, (100), 76 states have internal predecessors, (100), 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 18:39:30,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 100 transitions. [2021-11-25 18:39:30,546 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 100 transitions. Word has length 22 [2021-11-25 18:39:30,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:39:30,546 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 100 transitions. [2021-11-25 18:39:30,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 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 18:39:30,547 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 100 transitions. [2021-11-25 18:39:30,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-25 18:39:30,548 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:39:30,548 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:39:30,577 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-25 18:39:30,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-25 18:39:30,762 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:39:30,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:39:30,762 INFO L85 PathProgramCache]: Analyzing trace with hash -802088496, now seen corresponding path program 1 times [2021-11-25 18:39:30,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:39:30,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139481919] [2021-11-25 18:39:30,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:39:30,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:39:30,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:39:30,832 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 18:39:30,832 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:39:30,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139481919] [2021-11-25 18:39:30,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139481919] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:39:30,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612354675] [2021-11-25 18:39:30,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:39:30,833 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:39:30,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:39:30,847 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:39:30,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 18:39:31,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:39:31,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 18:39:31,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:39:31,067 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 18:39:31,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:39:31,116 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 18:39:31,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612354675] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:39:31,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [350420246] [2021-11-25 18:39:31,118 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 18:39:31,118 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:39:31,119 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:39:31,119 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:39:31,119 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:39:31,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:31,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:31,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:39:31,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:39:31,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:31,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:39:31,216 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 13 treesize of output 9 [2021-11-25 18:39:31,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:31,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:31,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 18:39:31,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:31,257 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 25 treesize of output 13 [2021-11-25 18:39:31,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:31,272 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 25 treesize of output 13 [2021-11-25 18:39:31,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:31,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:31,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:31,318 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 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-25 18:39:31,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:31,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:39:31,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:31,349 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 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:39:31,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:31,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:31,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:31,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:31,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:31,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:39:31,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:31,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:31,556 INFO L354 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2021-11-25 18:39:31,557 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 3 case distinctions, treesize of input 290 treesize of output 282 [2021-11-25 18:39:31,613 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:39:31,614 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 280 treesize of output 287 [2021-11-25 18:39:31,667 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:39:31,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 274 treesize of output 281 [2021-11-25 18:39:32,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:32,299 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:39:32,300 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 834 treesize of output 829 [2021-11-25 18:39:32,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:32,405 INFO L354 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2021-11-25 18:39:32,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 809 treesize of output 778 [2021-11-25 18:39:32,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:32,487 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:39:32,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 814 treesize of output 809 [2021-11-25 18:39:33,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:33,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:33,470 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 18:39:33,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 529 treesize of output 522 [2021-11-25 18:39:33,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:33,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:33,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:33,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:33,513 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 18:39:33,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 557 treesize of output 526 [2021-11-25 18:39:33,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:33,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:33,559 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 18:39:33,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 553 treesize of output 546 [2021-11-25 18:39:33,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:33,809 INFO L354 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2021-11-25 18:39:33,810 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 8 case distinctions, treesize of input 360 treesize of output 363 [2021-11-25 18:39:34,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:34,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:34,105 INFO L354 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2021-11-25 18:39:34,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 290 treesize of output 282 [2021-11-25 18:39:34,163 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:39:34,163 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 280 treesize of output 287 [2021-11-25 18:39:34,217 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:39:34,218 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 274 treesize of output 281 [2021-11-25 18:39:34,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:34,513 INFO L354 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2021-11-25 18:39:34,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 308 treesize of output 313 [2021-11-25 18:39:34,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:34,583 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:39:34,584 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 317 treesize of output 318 [2021-11-25 18:39:34,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:34,648 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:39:34,649 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 311 treesize of output 312 [2021-11-25 18:39:35,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:35,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:35,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:35,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:35,140 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 18:39:35,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 418 treesize of output 395 [2021-11-25 18:39:35,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:35,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:35,177 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 18:39:35,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 414 treesize of output 407 [2021-11-25 18:39:35,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:35,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:35,208 INFO L354 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2021-11-25 18:39:35,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 492 treesize of output 485 [2021-11-25 18:39:35,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:39:35,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:39:35,394 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 11 treesize of output 7 [2021-11-25 18:39:35,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:39:35,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:39:35,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:39:35,593 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 18:39:35,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:39:35,611 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:39:38,330 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3055#(and (<= (+ |ULTIMATE.start_sll_get_data_at_~head#1.offset| 4) (select |#length| |ULTIMATE.start_sll_get_data_at_~head#1.base|)) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_sll_get_data_at_~head#1.base|) |ULTIMATE.start_sll_get_data_at_~head#1.offset|) |ULTIMATE.start_sll_get_data_at_#res#1|) (= |ULTIMATE.start_sll_get_data_at_#in~head#1.offset| |ULTIMATE.start_sll_get_data_at_~head#1.offset|) (not (= |ULTIMATE.start_sll_get_data_at_#res#1| |ULTIMATE.start_main_~expected~0#1|)) (= |ULTIMATE.start_sll_get_data_at_#in~index#1| |ULTIMATE.start_main_~i~0#1|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (= (+ |ULTIMATE.start_main_~len~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~expected~0#1|) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (= (select |#valid| |ULTIMATE.start_sll_get_data_at_~head#1.base|) 1) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 0 |ULTIMATE.start_sll_get_data_at_~head#1.offset|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (= |ULTIMATE.start_sll_get_data_at_#in~head#1.offset| |ULTIMATE.start_main_~s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (= |ULTIMATE.start_sll_get_data_at_#in~head#1.base| |ULTIMATE.start_main_~s~0#1.base|) (= |ULTIMATE.start_sll_get_data_at_#in~index#1| |ULTIMATE.start_sll_get_data_at_~index#1|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= |ULTIMATE.start_sll_get_data_at_#res#1| 2147483647) (= |ULTIMATE.start_sll_get_data_at_#in~head#1.base| |ULTIMATE.start_sll_get_data_at_~head#1.base|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_sll_get_data_at_#res#1| 2147483648)))' at error location [2021-11-25 18:39:38,330 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:39:38,330 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:39:38,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2021-11-25 18:39:38,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28165219] [2021-11-25 18:39:38,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:39:38,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:39:38,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:39:38,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:39:38,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-11-25 18:39:38,332 INFO L87 Difference]: Start difference. First operand 77 states and 100 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 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 18:39:38,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:39:38,414 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2021-11-25 18:39:38,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:39:38,415 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-25 18:39:38,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:39:38,416 INFO L225 Difference]: With dead ends: 77 [2021-11-25 18:39:38,416 INFO L226 Difference]: Without dead ends: 77 [2021-11-25 18:39:38,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2021-11-25 18:39:38,417 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 45 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:39:38,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 128 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:39:38,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-25 18:39:38,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 71. [2021-11-25 18:39:38,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 56 states have (on average 1.5714285714285714) internal successors, (88), 70 states have internal predecessors, (88), 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 18:39:38,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2021-11-25 18:39:38,421 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 24 [2021-11-25 18:39:38,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:39:38,422 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2021-11-25 18:39:38,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 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 18:39:38,422 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2021-11-25 18:39:38,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-25 18:39:38,423 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:39:38,423 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2021-11-25 18:39:38,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 18:39:38,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:39:38,642 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:39:38,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:39:38,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1047313855, now seen corresponding path program 2 times [2021-11-25 18:39:38,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:39:38,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553878795] [2021-11-25 18:39:38,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:39:38,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:39:38,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:39:38,730 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 18:39:38,730 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:39:38,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553878795] [2021-11-25 18:39:38,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553878795] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:39:38,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959062148] [2021-11-25 18:39:38,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:39:38,731 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:39:38,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:39:38,733 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:39:38,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 18:39:38,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-25 18:39:38,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:39:38,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 18:39:38,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:39:38,976 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 18:39:38,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:39:39,056 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 18:39:39,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959062148] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:39:39,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1904881053] [2021-11-25 18:39:39,059 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 18:39:39,060 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:39:39,060 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:39:39,060 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:39:39,061 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:39:39,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:39,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:39,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:39:39,137 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 18:39:39,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:39,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:39:39,164 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 18:39:39,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:39,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:39,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 18:39:39,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:39,215 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 25 treesize of output 13 [2021-11-25 18:39:39,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:39,228 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 25 treesize of output 13 [2021-11-25 18:39:39,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:39,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:39:39,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:39,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:39,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:39,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-25 18:39:39,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:39,308 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 23 treesize of output 13 [2021-11-25 18:39:39,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:39,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:39,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:39,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:39,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:39,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:39:39,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:39,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:39,472 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:39:39,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 297 treesize of output 279 [2021-11-25 18:39:39,528 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:39:39,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 291 treesize of output 298 [2021-11-25 18:39:39,589 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:39:39,590 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 285 treesize of output 292 [2021-11-25 18:39:40,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:40,132 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:39:40,132 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 1002 treesize of output 997 [2021-11-25 18:39:40,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:40,205 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:39:40,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 977 treesize of output 926 [2021-11-25 18:39:40,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:40,273 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:39:40,273 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 974 treesize of output 969 [2021-11-25 18:39:40,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:40,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:40,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:40,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:40,961 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 18:39:40,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 425 treesize of output 402 [2021-11-25 18:39:40,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:40,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:41,011 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-25 18:39:41,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 421 treesize of output 414 [2021-11-25 18:39:41,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:41,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:41,056 INFO L354 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2021-11-25 18:39:41,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 499 treesize of output 492 [2021-11-25 18:39:41,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:41,273 INFO L354 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2021-11-25 18:39:41,273 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 8 case distinctions, treesize of input 395 treesize of output 390 [2021-11-25 18:39:41,539 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:39:41,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 291 treesize of output 298 [2021-11-25 18:39:41,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:41,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:41,560 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:39:41,560 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 2 case distinctions, treesize of input 291 treesize of output 273 [2021-11-25 18:39:41,600 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:39:41,601 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 285 treesize of output 292 [2021-11-25 18:39:41,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:41,778 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:39:41,778 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 318 treesize of output 319 [2021-11-25 18:39:41,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:41,825 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:39:41,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 312 treesize of output 313 [2021-11-25 18:39:41,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:41,872 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:39:41,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 293 treesize of output 294 [2021-11-25 18:39:42,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:42,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:42,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:42,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:42,173 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 18:39:42,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 305 treesize of output 290 [2021-11-25 18:39:42,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:42,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:42,204 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 18:39:42,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 301 treesize of output 294 [2021-11-25 18:39:42,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:42,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:42,233 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 18:39:42,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 313 treesize of output 306 [2021-11-25 18:39:42,374 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 11 treesize of output 7 [2021-11-25 18:39:42,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:39:42,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:39:42,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:39:42,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:39:42,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:39:42,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:39:42,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:39:42,705 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 15 treesize of output 1 [2021-11-25 18:39:42,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:39:42,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:39:42,771 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:39:45,426 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3370#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_update_at_#in~head#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= 0 |ULTIMATE.start_sll_update_at_#in~index#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 2 |ULTIMATE.start_sll_update_at_~data#1|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_update_at_#in~head#1.offset| 0) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 2 |ULTIMATE.start_sll_update_at_#in~data#1|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 2 |ULTIMATE.start_main_~new_data~0#1|) (< 0 |ULTIMATE.start_sll_update_at_~index#1|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (not (= (select |#valid| |ULTIMATE.start_sll_update_at_~head#1.base|) 1)) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2021-11-25 18:39:45,427 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:39:45,427 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:39:45,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2021-11-25 18:39:45,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024156577] [2021-11-25 18:39:45,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:39:45,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 18:39:45,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:39:45,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 18:39:45,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-11-25 18:39:45,429 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:39:45,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:39:45,549 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2021-11-25 18:39:45,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 18:39:45,550 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-25 18:39:45,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:39:45,551 INFO L225 Difference]: With dead ends: 62 [2021-11-25 18:39:45,551 INFO L226 Difference]: Without dead ends: 62 [2021-11-25 18:39:45,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2021-11-25 18:39:45,552 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 114 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:39:45,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 77 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:39:45,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-25 18:39:45,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2021-11-25 18:39:45,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 45 states have (on average 1.4666666666666666) internal successors, (66), 55 states have internal predecessors, (66), 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 18:39:45,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2021-11-25 18:39:45,556 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 25 [2021-11-25 18:39:45,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:39:45,557 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2021-11-25 18:39:45,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:39:45,557 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2021-11-25 18:39:45,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-25 18:39:45,568 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:39:45,568 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:39:45,618 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-25 18:39:45,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-25 18:39:45,786 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:39:45,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:39:45,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1624515148, now seen corresponding path program 1 times [2021-11-25 18:39:45,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:39:45,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777776217] [2021-11-25 18:39:45,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:39:45,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:39:45,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:39:46,238 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:39:46,238 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:39:46,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777776217] [2021-11-25 18:39:46,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777776217] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:39:46,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306095509] [2021-11-25 18:39:46,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:39:46,239 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:39:46,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:39:46,242 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:39:46,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 18:39:46,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:39:46,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 88 conjunts are in the unsatisfiable core [2021-11-25 18:39:46,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:39:46,464 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:39:46,464 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 18:39:46,581 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 18:39:46,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:39:46,759 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 20 treesize of output 19 [2021-11-25 18:39:46,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:46,893 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 18 treesize of output 8 [2021-11-25 18:39:46,959 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 14 treesize of output 16 [2021-11-25 18:39:47,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:39:47,169 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:39:47,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:39:47,298 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1043 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1043) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) |c_ULTIMATE.start_main_~len~0#1|)) (forall ((v_ArrVal_1043 (Array Int Int))) (<= |c_ULTIMATE.start_main_~len~0#1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1043) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)))) is different from false [2021-11-25 18:39:47,322 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1043 (Array Int Int))) (<= |c_ULTIMATE.start_main_~len~0#1| (select (select (store |c_#memory_int| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) (+ 4 |c_ULTIMATE.start_sll_update_at_~head#1.offset|)) v_ArrVal_1043) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) (forall ((v_ArrVal_1043 (Array Int Int))) (<= (select (select (store |c_#memory_int| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) (+ 4 |c_ULTIMATE.start_sll_update_at_~head#1.offset|)) v_ArrVal_1043) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) |c_ULTIMATE.start_main_~len~0#1|))) is different from false [2021-11-25 18:39:47,347 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1043 (Array Int Int))) (<= (select (select (store |c_#memory_int| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) v_ArrVal_1043) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) |c_ULTIMATE.start_main_~len~0#1|)) (forall ((v_ArrVal_1043 (Array Int Int))) (<= |c_ULTIMATE.start_main_~len~0#1| (select (select (store |c_#memory_int| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) v_ArrVal_1043) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)))) is different from false [2021-11-25 18:39:47,360 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:39:47,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 33 [2021-11-25 18:39:47,372 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:39:47,373 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 58 treesize of output 61 [2021-11-25 18:39:47,379 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 23 treesize of output 21 [2021-11-25 18:39:47,441 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:39:47,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 32 treesize of output 33 [2021-11-25 18:39:47,447 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 58 treesize of output 50 [2021-11-25 18:39:47,453 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 23 treesize of output 21 [2021-11-25 18:39:47,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-25 18:39:47,786 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2021-11-25 18:39:47,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306095509] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:39:47,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [40939746] [2021-11-25 18:39:47,788 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 18:39:47,789 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:39:47,789 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:39:47,789 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:39:47,789 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:39:47,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:47,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:47,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:39:47,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:39:47,868 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 18:39:47,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:47,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:39:47,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:47,904 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 25 treesize of output 13 [2021-11-25 18:39:47,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:47,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:47,918 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 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 18:39:47,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:47,934 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 25 treesize of output 13 [2021-11-25 18:39:47,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:47,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:47,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:47,970 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 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-25 18:39:47,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:47,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:39:48,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:48,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:39:48,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:48,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:48,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:48,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:48,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:48,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:39:48,171 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:39:48,174 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 291 treesize of output 298 [2021-11-25 18:39:48,222 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:39:48,222 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 285 treesize of output 292 [2021-11-25 18:39:48,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:48,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:48,266 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:39:48,267 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 2 case distinctions, treesize of input 285 treesize of output 267 [2021-11-25 18:39:48,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:48,631 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:39:48,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 735 treesize of output 730 [2021-11-25 18:39:48,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:48,715 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:39:48,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 710 treesize of output 679 [2021-11-25 18:39:48,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:48,792 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:39:48,792 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 711 treesize of output 712 [2021-11-25 18:39:49,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:49,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:49,390 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-25 18:39:49,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 429 treesize of output 422 [2021-11-25 18:39:49,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:49,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:49,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:49,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:49,417 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-25 18:39:49,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 517 treesize of output 494 [2021-11-25 18:39:49,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:49,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:49,450 INFO L354 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2021-11-25 18:39:49,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 513 treesize of output 506 [2021-11-25 18:39:49,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:49,624 INFO L354 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2021-11-25 18:39:49,625 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 8 case distinctions, treesize of input 415 treesize of output 410 [2021-11-25 18:39:49,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:49,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:49,849 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:39:49,849 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 2 case distinctions, treesize of input 297 treesize of output 279 [2021-11-25 18:39:49,913 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:39:49,914 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 291 treesize of output 298 [2021-11-25 18:39:49,970 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:39:49,971 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 285 treesize of output 292 [2021-11-25 18:39:50,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:50,183 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:39:50,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 318 treesize of output 319 [2021-11-25 18:39:50,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:50,238 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:39:50,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 312 treesize of output 313 [2021-11-25 18:39:50,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:50,300 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:39:50,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 293 treesize of output 294 [2021-11-25 18:39:50,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:50,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:50,785 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 18:39:50,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 301 treesize of output 294 [2021-11-25 18:39:50,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:50,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:50,830 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 18:39:50,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 313 treesize of output 306 [2021-11-25 18:39:50,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:50,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:50,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:50,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:50,867 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-25 18:39:50,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 395 treesize of output 380 [2021-11-25 18:39:51,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:39:51,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:39:51,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:39:51,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:39:51,397 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-25 18:39:51,398 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 148 treesize of output 146 [2021-11-25 18:39:51,442 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-25 18:39:51,443 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 142 treesize of output 140 [2021-11-25 18:39:51,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:39:51,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:39:51,804 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:39:56,850 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3698#(and (<= (+ |ULTIMATE.start_sll_get_data_at_~head#1.offset| 4) (select |#length| |ULTIMATE.start_sll_get_data_at_~head#1.base|)) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_sll_get_data_at_~head#1.base|) |ULTIMATE.start_sll_get_data_at_~head#1.offset|) |ULTIMATE.start_sll_get_data_at_#res#1|) (= |ULTIMATE.start_sll_get_data_at_#in~head#1.offset| |ULTIMATE.start_sll_get_data_at_~head#1.offset|) (not (= |ULTIMATE.start_sll_get_data_at_#res#1| |ULTIMATE.start_main_~expected~0#1|)) (= |ULTIMATE.start_sll_get_data_at_#in~index#1| |ULTIMATE.start_main_~i~0#1|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (= (+ |ULTIMATE.start_main_~len~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~expected~0#1|) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (= (select |#valid| |ULTIMATE.start_sll_get_data_at_~head#1.base|) 1) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 0 |ULTIMATE.start_sll_get_data_at_~head#1.offset|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (= |ULTIMATE.start_sll_get_data_at_#in~head#1.offset| |ULTIMATE.start_main_~s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (= |ULTIMATE.start_sll_get_data_at_#in~head#1.base| |ULTIMATE.start_main_~s~0#1.base|) (= |ULTIMATE.start_sll_get_data_at_#in~index#1| |ULTIMATE.start_sll_get_data_at_~index#1|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= |ULTIMATE.start_sll_get_data_at_#res#1| 2147483647) (= |ULTIMATE.start_sll_get_data_at_#in~head#1.base| |ULTIMATE.start_sll_get_data_at_~head#1.base|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_sll_get_data_at_#res#1| 2147483648)))' at error location [2021-11-25 18:39:56,850 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:39:56,850 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:39:56,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 42 [2021-11-25 18:39:56,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127821346] [2021-11-25 18:39:56,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:39:56,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-25 18:39:56,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:39:56,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-25 18:39:56,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=2434, Unknown=3, NotChecked=306, Total=2970 [2021-11-25 18:39:56,853 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 42 states, 42 states have (on average 1.7142857142857142) internal successors, (72), 42 states have internal predecessors, (72), 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 18:39:57,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:39:57,940 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2021-11-25 18:39:57,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-25 18:39:57,941 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.7142857142857142) internal successors, (72), 42 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-25 18:39:57,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:39:57,942 INFO L225 Difference]: With dead ends: 68 [2021-11-25 18:39:57,942 INFO L226 Difference]: Without dead ends: 68 [2021-11-25 18:39:57,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 69 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1297 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=474, Invalid=4091, Unknown=3, NotChecked=402, Total=4970 [2021-11-25 18:39:57,945 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 148 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 282 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:39:57,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 420 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 602 Invalid, 0 Unknown, 282 Unchecked, 0.4s Time] [2021-11-25 18:39:57,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-25 18:39:57,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2021-11-25 18:39:57,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 46 states have (on average 1.4565217391304348) internal successors, (67), 56 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:39:57,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2021-11-25 18:39:57,949 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 26 [2021-11-25 18:39:57,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:39:57,950 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2021-11-25 18:39:57,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.7142857142857142) internal successors, (72), 42 states have internal predecessors, (72), 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 18:39:57,950 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2021-11-25 18:39:57,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-25 18:39:57,951 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:39:57,951 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:39:57,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 18:39:58,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-25 18:39:58,165 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:39:58,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:39:58,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1622162611, now seen corresponding path program 1 times [2021-11-25 18:39:58,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:39:58,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809693286] [2021-11-25 18:39:58,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:39:58,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:39:58,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:39:58,231 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 18:39:58,231 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:39:58,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809693286] [2021-11-25 18:39:58,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809693286] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:39:58,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:39:58,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:39:58,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819775231] [2021-11-25 18:39:58,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:39:58,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:39:58,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:39:58,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:39:58,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:39:58,234 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:39:58,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:39:58,291 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2021-11-25 18:39:58,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:39:58,291 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-25 18:39:58,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:39:58,292 INFO L225 Difference]: With dead ends: 52 [2021-11-25 18:39:58,292 INFO L226 Difference]: Without dead ends: 52 [2021-11-25 18:39:58,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:39:58,294 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 7 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:39:58,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 63 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:39:58,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-25 18:39:58,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-11-25 18:39:58,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 51 states have internal predecessors, (55), 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 18:39:58,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2021-11-25 18:39:58,297 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 26 [2021-11-25 18:39:58,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:39:58,299 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2021-11-25 18:39:58,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:39:58,299 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2021-11-25 18:39:58,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-25 18:39:58,303 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:39:58,303 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:39:58,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-25 18:39:58,304 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:39:58,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:39:58,304 INFO L85 PathProgramCache]: Analyzing trace with hash 96397018, now seen corresponding path program 1 times [2021-11-25 18:39:58,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:39:58,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719410544] [2021-11-25 18:39:58,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:39:58,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:39:58,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:39:58,396 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 18:39:58,396 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:39:58,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719410544] [2021-11-25 18:39:58,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719410544] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:39:58,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437642577] [2021-11-25 18:39:58,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:39:58,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:39:58,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:39:58,402 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:39:58,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 18:39:58,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:39:58,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 18:39:58,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:39:58,660 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 18:39:58,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:39:58,719 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 18:39:58,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437642577] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:39:58,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [163804849] [2021-11-25 18:39:58,728 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 18:39:58,728 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:39:58,729 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:39:58,729 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:39:58,729 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:39:58,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:58,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:58,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:39:58,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:58,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:39:58,811 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 18:39:58,819 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 18:39:58,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:58,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 18:39:58,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:58,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:58,848 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 26 treesize of output 28 [2021-11-25 18:39:58,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:58,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 18:39:58,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:58,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:58,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:58,893 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 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-25 18:39:58,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:58,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:39:58,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:58,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:39:58,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:58,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:58,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:58,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:58,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:58,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:39:59,078 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:39:59,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 284 treesize of output 291 [2021-11-25 18:39:59,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:59,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:59,115 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:39:59,115 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 2 case distinctions, treesize of input 284 treesize of output 266 [2021-11-25 18:39:59,154 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:39:59,154 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 278 treesize of output 285 [2021-11-25 18:39:59,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:59,486 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:39:59,486 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 714 treesize of output 709 [2021-11-25 18:39:59,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:39:59,564 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:39:59,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 689 treesize of output 658 [2021-11-25 18:39:59,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:39:59,630 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:39:59,631 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 690 treesize of output 691 [2021-11-25 18:40:00,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:00,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:00,098 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-25 18:40:00,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 422 treesize of output 415 [2021-11-25 18:40:00,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:00,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:00,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:00,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:00,125 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-25 18:40:00,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 504 treesize of output 481 [2021-11-25 18:40:00,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:00,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:00,157 INFO L354 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2021-11-25 18:40:00,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 500 treesize of output 493 [2021-11-25 18:40:00,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:00,312 INFO L354 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2021-11-25 18:40:00,313 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 8 case distinctions, treesize of input 396 treesize of output 399 [2021-11-25 18:40:00,529 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:40:00,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 284 treesize of output 291 [2021-11-25 18:40:00,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:00,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:00,549 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:40:00,550 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 2 case distinctions, treesize of input 284 treesize of output 266 [2021-11-25 18:40:00,591 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:40:00,591 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 278 treesize of output 285 [2021-11-25 18:40:00,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:00,757 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:40:00,757 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 311 treesize of output 312 [2021-11-25 18:40:00,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:00,829 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:40:00,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 292 treesize of output 293 [2021-11-25 18:40:00,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:00,894 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:40:00,894 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 301 treesize of output 302 [2021-11-25 18:40:01,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:01,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:01,250 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-25 18:40:01,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 313 treesize of output 306 [2021-11-25 18:40:01,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:01,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:01,298 INFO L354 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2021-11-25 18:40:01,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 391 treesize of output 384 [2021-11-25 18:40:01,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:01,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:01,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:01,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:01,327 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-25 18:40:01,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 431 treesize of output 416 [2021-11-25 18:40:01,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:40:01,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:40:01,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:40:01,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:40:01,770 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-25 18:40:01,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 148 treesize of output 146 [2021-11-25 18:40:01,802 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-25 18:40:01,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 142 treesize of output 140 [2021-11-25 18:40:02,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:40:02,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:40:02,209 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:40:07,016 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4161#(and (<= (+ |ULTIMATE.start_sll_get_data_at_~head#1.offset| 4) (select |#length| |ULTIMATE.start_sll_get_data_at_~head#1.base|)) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_sll_get_data_at_~head#1.base|) |ULTIMATE.start_sll_get_data_at_~head#1.offset|) |ULTIMATE.start_sll_get_data_at_#res#1|) (= |ULTIMATE.start_sll_get_data_at_#in~head#1.offset| |ULTIMATE.start_sll_get_data_at_~head#1.offset|) (not (= |ULTIMATE.start_sll_get_data_at_#res#1| |ULTIMATE.start_main_~expected~0#1|)) (= |ULTIMATE.start_sll_get_data_at_#in~index#1| |ULTIMATE.start_main_~i~0#1|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (= (+ |ULTIMATE.start_main_~len~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~expected~0#1|) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (= (select |#valid| |ULTIMATE.start_sll_get_data_at_~head#1.base|) 1) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 0 |ULTIMATE.start_sll_get_data_at_~head#1.offset|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (= |ULTIMATE.start_sll_get_data_at_#in~head#1.offset| |ULTIMATE.start_main_~s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (= |ULTIMATE.start_sll_get_data_at_#in~head#1.base| |ULTIMATE.start_main_~s~0#1.base|) (= |ULTIMATE.start_sll_get_data_at_#in~index#1| |ULTIMATE.start_sll_get_data_at_~index#1|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= |ULTIMATE.start_sll_get_data_at_#res#1| 2147483647) (= |ULTIMATE.start_sll_get_data_at_#in~head#1.base| |ULTIMATE.start_sll_get_data_at_~head#1.base|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_sll_get_data_at_#res#1| 2147483648)))' at error location [2021-11-25 18:40:07,016 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:40:07,016 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:40:07,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2021-11-25 18:40:07,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390330053] [2021-11-25 18:40:07,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:40:07,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:40:07,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:40:07,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:40:07,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-11-25 18:40:07,018 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 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 18:40:07,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:40:07,080 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2021-11-25 18:40:07,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:40:07,080 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 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 30 [2021-11-25 18:40:07,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:40:07,081 INFO L225 Difference]: With dead ends: 51 [2021-11-25 18:40:07,081 INFO L226 Difference]: Without dead ends: 51 [2021-11-25 18:40:07,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-11-25 18:40:07,082 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 60 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:40:07,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 58 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:40:07,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-25 18:40:07,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-11-25 18:40:07,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 40 states have (on average 1.325) internal successors, (53), 50 states have internal predecessors, (53), 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 18:40:07,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2021-11-25 18:40:07,086 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 30 [2021-11-25 18:40:07,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:40:07,086 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2021-11-25 18:40:07,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 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 18:40:07,087 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2021-11-25 18:40:07,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-25 18:40:07,087 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:40:07,088 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:40:07,116 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-11-25 18:40:07,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:40:07,298 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:40:07,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:40:07,299 INFO L85 PathProgramCache]: Analyzing trace with hash 94044481, now seen corresponding path program 1 times [2021-11-25 18:40:07,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:40:07,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304683497] [2021-11-25 18:40:07,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:07,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:40:07,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:40:07,945 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:40:07,945 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:40:07,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304683497] [2021-11-25 18:40:07,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304683497] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:40:07,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175662835] [2021-11-25 18:40:07,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:07,946 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:40:07,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:40:07,947 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:40:07,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 18:40:08,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:40:08,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-25 18:40:08,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:40:08,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:40:08,195 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:40:08,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-25 18:40:08,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:40:08,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:08,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-11-25 18:40:08,481 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:40:08,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 35 [2021-11-25 18:40:08,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2021-11-25 18:40:08,607 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 18:40:08,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:40:08,729 INFO L354 Elim1Store]: treesize reduction 5, result has 70.6 percent of original size [2021-11-25 18:40:08,729 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 21 treesize of output 20 [2021-11-25 18:40:08,734 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1309 (Array Int Int))) (= |c_ULTIMATE.start_sll_update_at_~head#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1309) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)))) is different from false [2021-11-25 18:40:08,752 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1309 (Array Int Int))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) (+ 4 |c_ULTIMATE.start_sll_update_at_~head#1.offset|)))) (= .cse0 (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1309) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))))) is different from false [2021-11-25 18:40:08,765 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1309 (Array Int Int))) (let ((.cse1 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) .cse1))) (= (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1309) |c_ULTIMATE.start_main_~s~0#1.base|) .cse1) .cse0)))) is different from false [2021-11-25 18:40:08,775 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1307 Int) (v_ArrVal_1309 (Array Int Int))) (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) |c_ULTIMATE.start_sll_update_at_~head#1.offset| v_ArrVal_1307))) (.cse2 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_main_~s~0#1.base|) .cse2))) (= (select (select (store .cse0 .cse1 v_ArrVal_1309) |c_ULTIMATE.start_main_~s~0#1.base|) .cse2) .cse1)))) is different from false [2021-11-25 18:40:08,801 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_70| Int) (v_ArrVal_1307 Int) (v_ArrVal_1309 (Array Int Int))) (or (let ((.cse1 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_70| v_ArrVal_1307)) (.cse2 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (let ((.cse0 (select .cse1 .cse2))) (= .cse0 (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base| .cse1) .cse0 v_ArrVal_1309) |c_ULTIMATE.start_main_~s~0#1.base|) .cse2)))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_70|))) is different from false [2021-11-25 18:40:08,820 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_70| Int) (v_ArrVal_1307 Int) (v_ArrVal_1309 (Array Int Int))) (or (let ((.cse1 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_70| v_ArrVal_1307)) (.cse2 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4))) (let ((.cse0 (select .cse1 .cse2))) (= .cse0 (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse1) .cse0 v_ArrVal_1309) |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse2)))) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_70|))) is different from false [2021-11-25 18:40:08,835 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:40:08,836 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 51 [2021-11-25 18:40:08,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:08,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:08,848 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:40:08,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 31 [2021-11-25 18:40:08,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2021-11-25 18:40:08,856 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 18:40:09,006 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 8 not checked. [2021-11-25 18:40:09,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175662835] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:40:09,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1639410460] [2021-11-25 18:40:09,009 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 18:40:09,009 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:40:09,009 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:40:09,009 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:40:09,010 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:40:09,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:09,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:09,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:40:09,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:09,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:40:09,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:40:09,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:40:09,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:09,140 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 25 treesize of output 13 [2021-11-25 18:40:09,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:09,151 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 25 treesize of output 13 [2021-11-25 18:40:09,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:09,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:09,166 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 26 treesize of output 28 [2021-11-25 18:40:09,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:09,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:09,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:09,214 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 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-25 18:40:09,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:09,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:40:09,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:09,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:40:09,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:09,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:09,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:09,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:09,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:09,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:40:09,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:09,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:09,389 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:40:09,389 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 2 case distinctions, treesize of input 297 treesize of output 279 [2021-11-25 18:40:09,445 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:40:09,445 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 291 treesize of output 298 [2021-11-25 18:40:09,501 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:40:09,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 285 treesize of output 292 [2021-11-25 18:40:09,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:09,738 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:40:09,738 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 318 treesize of output 319 [2021-11-25 18:40:09,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:09,807 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:40:09,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 299 treesize of output 300 [2021-11-25 18:40:09,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:09,882 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:40:09,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 308 treesize of output 309 [2021-11-25 18:40:10,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:10,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:10,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:10,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:10,304 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 18:40:10,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 305 treesize of output 290 [2021-11-25 18:40:10,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:10,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:10,336 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 18:40:10,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 301 treesize of output 294 [2021-11-25 18:40:10,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:10,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:10,375 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 18:40:10,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 313 treesize of output 306 [2021-11-25 18:40:10,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:10,535 INFO L354 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2021-11-25 18:40:10,536 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 8 case distinctions, treesize of input 380 treesize of output 383 [2021-11-25 18:40:10,762 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:40:10,762 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 291 treesize of output 298 [2021-11-25 18:40:10,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:10,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:10,794 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:40:10,795 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 2 case distinctions, treesize of input 291 treesize of output 273 [2021-11-25 18:40:10,834 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:40:10,834 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 285 treesize of output 292 [2021-11-25 18:40:11,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:11,157 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:40:11,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 576 treesize of output 577 [2021-11-25 18:40:11,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:11,210 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:40:11,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 570 treesize of output 571 [2021-11-25 18:40:11,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:11,261 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:40:11,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 551 treesize of output 532 [2021-11-25 18:40:11,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:11,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:11,792 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-25 18:40:11,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 312 treesize of output 305 [2021-11-25 18:40:11,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:11,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:11,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:11,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:11,830 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 18:40:11,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 352 treesize of output 337 [2021-11-25 18:40:11,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:11,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:11,875 INFO L354 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2021-11-25 18:40:11,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 348 treesize of output 341 [2021-11-25 18:40:12,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:40:12,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:40:12,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:40:12,352 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-25 18:40:12,352 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 146 treesize of output 144 [2021-11-25 18:40:12,383 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-25 18:40:12,383 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 140 treesize of output 138 [2021-11-25 18:40:12,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:40:13,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:40:13,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:40:13,276 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:40:18,563 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4496#(and (<= |ULTIMATE.start_sll_get_data_at_~index#1| 0) (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= |ULTIMATE.start_main_~expected~0#1| 4) (<= |ULTIMATE.start_main_~data~0#1| 1) (<= 0 |#NULL.base|) (<= 2 |ULTIMATE.start_main_~len~0#1|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_main_~i~0#1| 2) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~len~0#1| 2) (<= 0 |ULTIMATE.start_sll_get_data_at_~index#1|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_sll_get_data_at_#in~index#1| 2) (<= 0 |ULTIMATE.start_sll_get_data_at_#in~head#1.offset|) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |#NULL.base| 0) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (not (= (select |#valid| |ULTIMATE.start_sll_get_data_at_~head#1.base|) 1)) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 2 |ULTIMATE.start_main_~expected~0#1|) (<= 0 |#NULL.offset|) (<= 1 |ULTIMATE.start_main_~data~0#1|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_get_data_at_#in~index#1|) (<= |ULTIMATE.start_sll_get_data_at_#in~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|))' at error location [2021-11-25 18:40:18,563 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:40:18,564 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:40:18,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 15] total 42 [2021-11-25 18:40:18,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38815274] [2021-11-25 18:40:18,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:40:18,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-25 18:40:18,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:40:18,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-25 18:40:18,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=2364, Unknown=6, NotChecked=618, Total=3192 [2021-11-25 18:40:18,567 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand has 43 states, 42 states have (on average 1.9285714285714286) internal successors, (81), 43 states have internal predecessors, (81), 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 18:40:18,928 WARN L838 $PredicateComparison]: unable to prove that (and (= (select |c_#valid| |c_ULTIMATE.start_node_create_~temp~0#1.base|) 1) (= (select |c_#valid| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 1) (= |c_ULTIMATE.start_node_create_~temp~0#1.offset| |c_ULTIMATE.start_sll_create_~head~0#1.offset|) (= |c_ULTIMATE.start_node_create_~temp~0#1.offset| 0) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4) |c_ULTIMATE.start_sll_create_~head~0#1.offset|) (not (= |c_ULTIMATE.start_sll_create_~head~0#1.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4)))) (= |c_ULTIMATE.start_sll_create_~head~0#1.offset| 0) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_70| Int) (v_ArrVal_1307 Int) (v_ArrVal_1309 (Array Int Int))) (or (let ((.cse1 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_70| v_ArrVal_1307)) (.cse2 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4))) (let ((.cse0 (select .cse1 .cse2))) (= .cse0 (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse1) .cse0 v_ArrVal_1309) |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse2)))) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_70|))) (= |c_ULTIMATE.start_sll_create_~head~0#1.offset| |c_ULTIMATE.start_sll_create_~new_head~0#1.offset|) (= |c_ULTIMATE.start_sll_create_~new_head~0#1.offset| 0) (= (select |c_#valid| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) 1)) is different from false [2021-11-25 18:40:18,931 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_70| Int) (v_ArrVal_1307 Int) (v_ArrVal_1309 (Array Int Int))) (or (let ((.cse1 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_70| v_ArrVal_1307)) (.cse2 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (let ((.cse0 (select .cse1 .cse2))) (= .cse0 (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base| .cse1) .cse0 v_ArrVal_1309) |c_ULTIMATE.start_main_~s~0#1.base|) .cse2)))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_70|))) (= |c_ULTIMATE.start_main_~i~0#1| 0) (not (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) |c_ULTIMATE.start_main_~s~0#1.base|)) (= |c_ULTIMATE.start_main_~s~0#1.offset| (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) 4)) (= |c_ULTIMATE.start_main_~s~0#1.offset| 0)) is different from false [2021-11-25 18:40:20,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:40:20,113 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2021-11-25 18:40:20,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-25 18:40:20,113 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.9285714285714286) internal successors, (81), 43 states have internal predecessors, (81), 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 30 [2021-11-25 18:40:20,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:40:20,114 INFO L225 Difference]: With dead ends: 72 [2021-11-25 18:40:20,114 INFO L226 Difference]: Without dead ends: 72 [2021-11-25 18:40:20,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=464, Invalid=4252, Unknown=8, NotChecked=1128, Total=5852 [2021-11-25 18:40:20,117 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 380 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 1248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 311 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:40:20,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 270 Invalid, 1248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 845 Invalid, 0 Unknown, 311 Unchecked, 0.5s Time] [2021-11-25 18:40:20,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-25 18:40:20,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 54. [2021-11-25 18:40:20,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 43 states have (on average 1.372093023255814) internal successors, (59), 53 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:40:20,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2021-11-25 18:40:20,121 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 30 [2021-11-25 18:40:20,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:40:20,121 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2021-11-25 18:40:20,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.9285714285714286) internal successors, (81), 43 states have internal predecessors, (81), 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 18:40:20,122 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2021-11-25 18:40:20,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-25 18:40:20,122 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:40:20,122 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:40:20,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-25 18:40:20,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:40:20,326 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:40:20,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:40:20,327 INFO L85 PathProgramCache]: Analyzing trace with hash 94044482, now seen corresponding path program 1 times [2021-11-25 18:40:20,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:40:20,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320048035] [2021-11-25 18:40:20,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:20,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:40:20,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:40:20,837 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 18:40:20,837 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:40:20,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320048035] [2021-11-25 18:40:20,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320048035] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:40:20,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880295366] [2021-11-25 18:40:20,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:20,838 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:40:20,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:40:20,842 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:40:20,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-25 18:40:21,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:40:21,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-25 18:40:21,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:40:21,115 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:40:21,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-25 18:40:21,174 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 18:40:21,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:21,272 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 22 treesize of output 21 [2021-11-25 18:40:21,378 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:40:21,379 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 53 [2021-11-25 18:40:21,395 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 0 case distinctions, treesize of input 41 treesize of output 41 [2021-11-25 18:40:21,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 21 [2021-11-25 18:40:21,569 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 32 treesize of output 14 [2021-11-25 18:40:21,614 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 18:40:21,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:40:21,760 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:40:21,761 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 46 treesize of output 50 [2021-11-25 18:40:21,941 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:40:21,942 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 123 treesize of output 108 [2021-11-25 18:40:21,946 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 89 treesize of output 85 [2021-11-25 18:40:21,950 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 85 treesize of output 81 [2021-11-25 18:40:22,623 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_79| Int) (v_ArrVal_1416 Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_79|) (not (= |c_ULTIMATE.start_main_~s~0#1.base| (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_79| v_ArrVal_1416) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)))))) is different from false [2021-11-25 18:40:23,152 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_79| Int) (v_ArrVal_1416 Int)) (or (not (= (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_79| v_ArrVal_1416) (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4)) |c_ULTIMATE.start_sll_create_~head~0#1.base|)) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_79|))) is different from false [2021-11-25 18:40:23,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-25 18:40:23,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:23,223 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2021-11-25 18:40:23,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880295366] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:40:23,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1977432658] [2021-11-25 18:40:23,226 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 18:40:23,226 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:40:23,226 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:40:23,227 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:40:23,227 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:40:23,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:23,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:23,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:40:23,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:23,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:40:23,301 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 18:40:23,311 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 18:40:23,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:23,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:23,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 18:40:23,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:23,352 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 25 treesize of output 13 [2021-11-25 18:40:23,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:23,361 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 25 treesize of output 13 [2021-11-25 18:40:23,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:23,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:40:23,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:23,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:23,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:23,400 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 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-25 18:40:23,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:23,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:40:23,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:23,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:23,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:23,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:23,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:23,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:40:23,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:23,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:23,534 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:40:23,535 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 2 case distinctions, treesize of input 290 treesize of output 272 [2021-11-25 18:40:23,572 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:40:23,573 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 284 treesize of output 291 [2021-11-25 18:40:23,613 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:40:23,613 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 278 treesize of output 285 [2021-11-25 18:40:23,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:23,772 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:40:23,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 311 treesize of output 312 [2021-11-25 18:40:23,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:23,821 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:40:23,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 292 treesize of output 293 [2021-11-25 18:40:23,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:23,867 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:40:23,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 301 treesize of output 302 [2021-11-25 18:40:24,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:24,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:24,202 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-25 18:40:24,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 313 treesize of output 306 [2021-11-25 18:40:24,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:24,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:24,236 INFO L354 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2021-11-25 18:40:24,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 349 treesize of output 342 [2021-11-25 18:40:24,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:24,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:24,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:24,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:24,261 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-25 18:40:24,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 431 treesize of output 416 [2021-11-25 18:40:24,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:24,398 INFO L354 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2021-11-25 18:40:24,399 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 8 case distinctions, treesize of input 416 treesize of output 419 [2021-11-25 18:40:24,620 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:40:24,620 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 284 treesize of output 291 [2021-11-25 18:40:24,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:24,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:24,641 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:40:24,641 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 2 case distinctions, treesize of input 284 treesize of output 266 [2021-11-25 18:40:24,681 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:40:24,682 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 278 treesize of output 285 [2021-11-25 18:40:24,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:24,865 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:40:24,865 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 311 treesize of output 312 [2021-11-25 18:40:24,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:24,910 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:40:24,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 292 treesize of output 293 [2021-11-25 18:40:24,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:24,956 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:40:24,957 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 301 treesize of output 302 [2021-11-25 18:40:25,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:25,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:25,283 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-25 18:40:25,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 313 treesize of output 306 [2021-11-25 18:40:25,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:25,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:25,316 INFO L354 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2021-11-25 18:40:25,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 349 treesize of output 342 [2021-11-25 18:40:25,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:25,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:25,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:25,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:25,340 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-25 18:40:25,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 431 treesize of output 416 [2021-11-25 18:40:25,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:40:25,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:40:25,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:40:25,771 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-25 18:40:25,772 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 146 treesize of output 144 [2021-11-25 18:40:25,808 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-25 18:40:25,808 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 140 treesize of output 138 [2021-11-25 18:40:25,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:40:26,767 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 18:40:26,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:40:26,779 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:40:31,682 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4887#(and (<= |ULTIMATE.start_sll_get_data_at_~index#1| 0) (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= |ULTIMATE.start_main_~expected~0#1| 4) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_main_~i~0#1| 2) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= |ULTIMATE.start_sll_get_data_at_#in~index#1| 2) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 0 |ULTIMATE.start_sll_get_data_at_#in~head#1.offset|) (<= |ULTIMATE.start_sll_create_~data#1| 1) (or (< (select |#length| |ULTIMATE.start_sll_get_data_at_~head#1.base|) (+ |ULTIMATE.start_sll_get_data_at_~head#1.offset| 4)) (< |ULTIMATE.start_sll_get_data_at_~head#1.offset| 0)) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= |ULTIMATE.start_sll_get_data_at_#in~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2021-11-25 18:40:31,682 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:40:31,683 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:40:31,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 13] total 33 [2021-11-25 18:40:31,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372994704] [2021-11-25 18:40:31,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:40:31,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-25 18:40:31,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:40:31,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-25 18:40:31,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1987, Unknown=2, NotChecked=182, Total=2352 [2021-11-25 18:40:31,686 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand has 34 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 34 states have internal predecessors, (77), 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 18:40:32,456 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4))) (and (= (select |c_#length| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 8) (= (select |c_#valid| |c_ULTIMATE.start_node_create_~temp~0#1.base|) 1) (= (select |c_#valid| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 1) (= 8 (select |c_#length| |c_ULTIMATE.start_node_create_~temp~0#1.base|)) (= |c_ULTIMATE.start_node_create_~temp~0#1.offset| 0) (= |c_ULTIMATE.start_sll_create_~head~0#1.offset| 0) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_79| Int) (v_ArrVal_1416 Int)) (or (not (= (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_79| v_ArrVal_1416) (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4)) |c_ULTIMATE.start_sll_create_~head~0#1.base|)) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_79|))) (= (select |c_#length| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) 8) (= |c_ULTIMATE.start_sll_create_~new_head~0#1.offset| 0) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4) 0) (= (select |c_#valid| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) 1) (= 8 (select |c_#length| .cse0)) (not (= .cse0 |c_ULTIMATE.start_sll_create_~head~0#1.base|)))) is different from false [2021-11-25 18:40:32,977 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) 4))) (and (not (= |c_ULTIMATE.start_main_~s~0#1.base| .cse0)) (= 0 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) 4)) (= (select |c_#length| .cse0) 8) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_79| Int) (v_ArrVal_1416 Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_79|) (not (= |c_ULTIMATE.start_main_~s~0#1.base| (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_79| v_ArrVal_1416) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)))))) (= |c_ULTIMATE.start_main_~s~0#1.offset| 0))) is different from false [2021-11-25 18:40:33,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:40:33,569 INFO L93 Difference]: Finished difference Result 74 states and 77 transitions. [2021-11-25 18:40:33,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-25 18:40:33,571 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 34 states have internal predecessors, (77), 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 30 [2021-11-25 18:40:33,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:40:33,571 INFO L225 Difference]: With dead ends: 74 [2021-11-25 18:40:33,572 INFO L226 Difference]: Without dead ends: 74 [2021-11-25 18:40:33,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=311, Invalid=3123, Unknown=4, NotChecked=468, Total=3906 [2021-11-25 18:40:33,575 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 131 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:40:33,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 228 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 499 Invalid, 0 Unknown, 169 Unchecked, 0.4s Time] [2021-11-25 18:40:33,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-25 18:40:33,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 54. [2021-11-25 18:40:33,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 53 states have internal predecessors, (57), 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 18:40:33,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2021-11-25 18:40:33,583 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 30 [2021-11-25 18:40:33,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:40:33,584 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2021-11-25 18:40:33,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 34 states have internal predecessors, (77), 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 18:40:33,584 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2021-11-25 18:40:33,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-25 18:40:33,585 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:40:33,585 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] [2021-11-25 18:40:33,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-25 18:40:33,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-25 18:40:33,806 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:40:33,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:40:33,807 INFO L85 PathProgramCache]: Analyzing trace with hash 182493149, now seen corresponding path program 1 times [2021-11-25 18:40:33,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:40:33,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405501686] [2021-11-25 18:40:33,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:33,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:40:33,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:40:34,449 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:40:34,449 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:40:34,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405501686] [2021-11-25 18:40:34,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405501686] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:40:34,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555575385] [2021-11-25 18:40:34,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:34,450 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:40:34,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:40:34,451 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:40:34,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-25 18:40:34,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:40:34,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 85 conjunts are in the unsatisfiable core [2021-11-25 18:40:34,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:40:34,635 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:40:34,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-25 18:40:34,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:40:34,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:34,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-11-25 18:40:34,936 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:40:34,936 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 63 [2021-11-25 18:40:34,939 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 31 treesize of output 21 [2021-11-25 18:40:34,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-25 18:40:35,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 21 [2021-11-25 18:40:35,172 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 23 treesize of output 11 [2021-11-25 18:40:35,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-25 18:40:35,225 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:40:35,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:40:35,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 64 [2021-11-25 18:40:35,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 64 [2021-11-25 18:40:35,524 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_main_~len~0#1| 1))) (and (<= .cse0 |c_ULTIMATE.start_sll_update_at_~data#1|) (forall ((v_ArrVal_1531 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1531) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) |c_ULTIMATE.start_sll_update_at_~head#1.offset|)) (<= |c_ULTIMATE.start_sll_update_at_~data#1| .cse0) (forall ((v_ArrVal_1528 (Array Int Int))) (= |c_ULTIMATE.start_sll_update_at_~head#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1528) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)))))) is different from false [2021-11-25 18:40:35,558 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:40:35,558 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 50 treesize of output 47 [2021-11-25 18:40:35,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-25 18:40:37,784 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_88| Int)) (or (and (= |c_ULTIMATE.start_main_~i~0#1| 0) (forall ((v_ArrVal_1526 Int)) (not (= (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_88| v_ArrVal_1526) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) |c_ULTIMATE.start_main_~s~0#1.base|)))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_88|))) is different from false [2021-11-25 18:40:39,795 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_88| Int)) (or (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_88|) (forall ((v_ArrVal_1526 Int)) (not (= (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_88| v_ArrVal_1526) (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4)) |c_ULTIMATE.start_sll_create_~head~0#1.base|))))) is different from false [2021-11-25 18:40:39,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-25 18:40:39,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:39,858 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2021-11-25 18:40:39,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555575385] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:40:39,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [558630411] [2021-11-25 18:40:39,860 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-25 18:40:39,860 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:40:39,861 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:40:39,861 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:40:39,861 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:40:39,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:39,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:39,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:40:39,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:39,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:40:39,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:40:39,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:40:39,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:39,967 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 25 treesize of output 13 [2021-11-25 18:40:39,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:39,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:39,980 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 26 treesize of output 28 [2021-11-25 18:40:39,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:39,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 18:40:40,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:40,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:40:40,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:40,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:40,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:40,027 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 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-25 18:40:40,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:40,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:40:40,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:40,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:40,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:40,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:40,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:40,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:40:40,168 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:40:40,169 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 284 treesize of output 291 [2021-11-25 18:40:40,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:40,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:40,185 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:40:40,186 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 2 case distinctions, treesize of input 284 treesize of output 266 [2021-11-25 18:40:40,218 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:40:40,218 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 278 treesize of output 285 [2021-11-25 18:40:40,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:40,353 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:40:40,353 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 311 treesize of output 312 [2021-11-25 18:40:40,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:40,389 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:40:40,389 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 305 treesize of output 306 [2021-11-25 18:40:40,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:40,427 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:40:40,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 286 treesize of output 287 [2021-11-25 18:40:40,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:40,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:40,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:40,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:40,686 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 18:40:40,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 305 treesize of output 290 [2021-11-25 18:40:40,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:40,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:40,710 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 18:40:40,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 301 treesize of output 294 [2021-11-25 18:40:40,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:40,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:40,735 INFO L354 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2021-11-25 18:40:40,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 379 treesize of output 372 [2021-11-25 18:40:40,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:40,846 INFO L354 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2021-11-25 18:40:40,846 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 8 case distinctions, treesize of input 380 treesize of output 383 [2021-11-25 18:40:41,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:41,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:41,058 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:40:41,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 290 treesize of output 272 [2021-11-25 18:40:41,091 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:40:41,091 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 284 treesize of output 291 [2021-11-25 18:40:41,124 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:40:41,124 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 278 treesize of output 285 [2021-11-25 18:40:41,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:41,257 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:40:41,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 311 treesize of output 312 [2021-11-25 18:40:41,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:41,295 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:40:41,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 292 treesize of output 293 [2021-11-25 18:40:41,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:41,333 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:40:41,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 301 treesize of output 302 [2021-11-25 18:40:41,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:41,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:41,600 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-25 18:40:41,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 313 treesize of output 306 [2021-11-25 18:40:41,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:41,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:41,625 INFO L354 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2021-11-25 18:40:41,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 391 treesize of output 384 [2021-11-25 18:40:41,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:41,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:41,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:41,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:41,645 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-25 18:40:41,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 431 treesize of output 416 [2021-11-25 18:40:41,795 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 15 treesize of output 1 [2021-11-25 18:40:41,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:40:41,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:40:41,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:40:41,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:40:41,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:40:42,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:40:42,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:40:42,513 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:40:46,452 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5290#(and (<= |ULTIMATE.start_sll_get_data_at_~index#1| 0) (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 0 |ULTIMATE.start_sll_get_data_at_~index#1|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_sll_get_data_at_~head#1.offset|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 0 |ULTIMATE.start_sll_get_data_at_#in~head#1.offset|) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= |ULTIMATE.start_sll_get_data_at_#res#1| 2147483647) (<= 2 |ULTIMATE.start_main_~expected~0#1|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_get_data_at_#in~index#1|) (<= |ULTIMATE.start_sll_get_data_at_#in~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_sll_get_data_at_#res#1| 2147483648)))' at error location [2021-11-25 18:40:46,452 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:40:46,453 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:40:46,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 17] total 43 [2021-11-25 18:40:46,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729901149] [2021-11-25 18:40:46,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:40:46,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-25 18:40:46,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:40:46,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-25 18:40:46,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=2678, Unknown=3, NotChecked=318, Total=3192 [2021-11-25 18:40:46,456 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 43 states have internal predecessors, (77), 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 18:40:47,205 WARN L838 $PredicateComparison]: unable to prove that (and (= (select |c_#valid| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 1) (= |c_ULTIMATE.start_node_create_~temp~0#1.offset| |c_ULTIMATE.start_sll_create_~head~0#1.offset|) (= |c_ULTIMATE.start_node_create_~temp~0#1.offset| 0) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4) |c_ULTIMATE.start_sll_create_~head~0#1.offset|) (not (= |c_ULTIMATE.start_sll_create_~head~0#1.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4)))) (= |c_ULTIMATE.start_sll_create_~head~0#1.offset| 0) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_88| Int)) (or (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_88|) (forall ((v_ArrVal_1526 Int)) (not (= (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_88| v_ArrVal_1526) (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4)) |c_ULTIMATE.start_sll_create_~head~0#1.base|))))) (= |c_ULTIMATE.start_sll_create_~head~0#1.offset| |c_ULTIMATE.start_sll_create_~new_head~0#1.offset|) (= |c_ULTIMATE.start_sll_create_~new_head~0#1.offset| 0)) is different from false [2021-11-25 18:40:47,631 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~i~0#1| 0) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_88| Int)) (or (and (= |c_ULTIMATE.start_main_~i~0#1| 0) (forall ((v_ArrVal_1526 Int)) (not (= (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_88| v_ArrVal_1526) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) |c_ULTIMATE.start_main_~s~0#1.base|)))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_88|))) (not (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) |c_ULTIMATE.start_main_~s~0#1.base|)) (= |c_ULTIMATE.start_main_~s~0#1.offset| (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) 4)) (= |c_ULTIMATE.start_main_~s~0#1.offset| 0)) is different from false [2021-11-25 18:40:48,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:40:48,578 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2021-11-25 18:40:48,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-25 18:40:48,579 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 43 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-25 18:40:48,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:40:48,580 INFO L225 Difference]: With dead ends: 72 [2021-11-25 18:40:48,580 INFO L226 Difference]: Without dead ends: 72 [2021-11-25 18:40:48,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 57 SyntacticMatches, 5 SemanticMatches, 75 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 1047 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=376, Invalid=4751, Unknown=5, NotChecked=720, Total=5852 [2021-11-25 18:40:48,583 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 173 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 1044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 220 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:40:48,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 550 Invalid, 1044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 784 Invalid, 0 Unknown, 220 Unchecked, 0.4s Time] [2021-11-25 18:40:48,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-25 18:40:48,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 55. [2021-11-25 18:40:48,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 44 states have (on average 1.3181818181818181) internal successors, (58), 54 states have internal predecessors, (58), 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 18:40:48,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2021-11-25 18:40:48,585 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 32 [2021-11-25 18:40:48,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:40:48,586 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2021-11-25 18:40:48,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 43 states have internal predecessors, (77), 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 18:40:48,586 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2021-11-25 18:40:48,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-25 18:40:48,587 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:40:48,587 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:40:48,612 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-11-25 18:40:48,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-25 18:40:48,797 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:40:48,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:40:48,797 INFO L85 PathProgramCache]: Analyzing trace with hash 180140612, now seen corresponding path program 2 times [2021-11-25 18:40:48,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:40:48,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331671611] [2021-11-25 18:40:48,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:48,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:40:48,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:40:48,855 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 18:40:48,855 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:40:48,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331671611] [2021-11-25 18:40:48,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331671611] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:40:48,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856309300] [2021-11-25 18:40:48,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:40:48,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:40:48,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:40:48,870 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:40:48,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-25 18:40:49,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 18:40:49,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:40:49,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 18:40:49,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:40:49,124 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 18:40:49,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:40:49,194 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 18:40:49,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856309300] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:40:49,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [992659813] [2021-11-25 18:40:49,196 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 18:40:49,196 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:40:49,197 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:40:49,197 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:40:49,197 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:40:49,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:49,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:49,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:40:49,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:40:49,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:49,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:40:49,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:40:49,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:49,292 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 25 treesize of output 13 [2021-11-25 18:40:49,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:49,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:49,304 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 26 treesize of output 28 [2021-11-25 18:40:49,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:49,317 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 25 treesize of output 13 [2021-11-25 18:40:49,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:49,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:49,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:49,337 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 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-25 18:40:49,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:49,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:40:49,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:49,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:40:49,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:49,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:49,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:49,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:49,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:49,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:40:49,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:49,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:49,441 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:40:49,441 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 2 case distinctions, treesize of input 290 treesize of output 272 [2021-11-25 18:40:49,473 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:40:49,473 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 284 treesize of output 291 [2021-11-25 18:40:49,519 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:40:49,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 278 treesize of output 285 [2021-11-25 18:40:49,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:49,802 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:40:49,803 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 974 treesize of output 969 [2021-11-25 18:40:49,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:49,848 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:40:49,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 949 treesize of output 898 [2021-11-25 18:40:49,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:49,894 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:40:49,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 946 treesize of output 941 [2021-11-25 18:40:50,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:50,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:50,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:50,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:50,335 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 18:40:50,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 418 treesize of output 395 [2021-11-25 18:40:50,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:50,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:50,367 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-25 18:40:50,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 414 treesize of output 407 [2021-11-25 18:40:50,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:50,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:50,393 INFO L354 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2021-11-25 18:40:50,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 444 treesize of output 437 [2021-11-25 18:40:50,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:50,525 INFO L354 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2021-11-25 18:40:50,525 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 8 case distinctions, treesize of input 376 treesize of output 379 [2021-11-25 18:40:50,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:50,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:50,690 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:40:50,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 290 treesize of output 272 [2021-11-25 18:40:50,721 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:40:50,721 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 284 treesize of output 291 [2021-11-25 18:40:50,750 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:40:50,750 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 278 treesize of output 285 [2021-11-25 18:40:50,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:50,985 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:40:50,985 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 714 treesize of output 709 [2021-11-25 18:40:51,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:51,029 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:40:51,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 689 treesize of output 658 [2021-11-25 18:40:51,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:51,072 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:40:51,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 690 treesize of output 691 [2021-11-25 18:40:51,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:51,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:51,463 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-25 18:40:51,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 305 treesize of output 298 [2021-11-25 18:40:51,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:51,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:51,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:51,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:51,491 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 18:40:51,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 339 treesize of output 324 [2021-11-25 18:40:51,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:51,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:51,516 INFO L354 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2021-11-25 18:40:51,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 335 treesize of output 328 [2021-11-25 18:40:51,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:40:51,656 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 15 treesize of output 1 [2021-11-25 18:40:51,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:40:51,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:40:51,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:40:51,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:40:52,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:40:52,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:40:52,314 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:40:55,023 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5666#(and (<= |ULTIMATE.start_sll_get_data_at_~index#1| 0) (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= |ULTIMATE.start_main_~expected~0#1| 4) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_main_~i~0#1| 2) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 0 |ULTIMATE.start_sll_get_data_at_~index#1|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_sll_get_data_at_#in~index#1| 2) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 0 |ULTIMATE.start_sll_get_data_at_#in~head#1.offset|) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (not (= (select |#valid| |ULTIMATE.start_sll_get_data_at_~head#1.base|) 1)) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 2 |ULTIMATE.start_main_~expected~0#1|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_get_data_at_#in~index#1|) (<= |ULTIMATE.start_sll_get_data_at_#in~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2021-11-25 18:40:55,023 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:40:55,024 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:40:55,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 7 [2021-11-25 18:40:55,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841405691] [2021-11-25 18:40:55,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:40:55,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:40:55,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:40:55,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:40:55,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-11-25 18:40:55,025 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:40:55,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:40:55,112 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2021-11-25 18:40:55,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 18:40:55,113 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-25 18:40:55,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:40:55,113 INFO L225 Difference]: With dead ends: 44 [2021-11-25 18:40:55,113 INFO L226 Difference]: Without dead ends: 44 [2021-11-25 18:40:55,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 79 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2021-11-25 18:40:55,114 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 43 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:40:55,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 49 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:40:55,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-25 18:40:55,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-11-25 18:40:55,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 43 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:40:55,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2021-11-25 18:40:55,116 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 32 [2021-11-25 18:40:55,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:40:55,117 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2021-11-25 18:40:55,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:40:55,117 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2021-11-25 18:40:55,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-25 18:40:55,117 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:40:55,117 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:40:55,138 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-11-25 18:40:55,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:40:55,318 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:40:55,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:40:55,318 INFO L85 PathProgramCache]: Analyzing trace with hash -716343372, now seen corresponding path program 1 times [2021-11-25 18:40:55,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:40:55,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764019682] [2021-11-25 18:40:55,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:55,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:40:55,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:40:55,396 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 18:40:55,396 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:40:55,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764019682] [2021-11-25 18:40:55,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764019682] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:40:55,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:40:55,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 18:40:55,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244995890] [2021-11-25 18:40:55,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:40:55,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:40:55,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:40:55,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:40:55,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:40:55,399 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 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 18:40:55,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:40:55,501 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2021-11-25 18:40:55,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:40:55,501 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 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 34 [2021-11-25 18:40:55,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:40:55,502 INFO L225 Difference]: With dead ends: 53 [2021-11-25 18:40:55,502 INFO L226 Difference]: Without dead ends: 53 [2021-11-25 18:40:55,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-25 18:40:55,503 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 145 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:40:55,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 18 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:40:55,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-25 18:40:55,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 45. [2021-11-25 18:40:55,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 44 states have internal predecessors, (46), 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 18:40:55,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-11-25 18:40:55,504 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 34 [2021-11-25 18:40:55,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:40:55,505 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-11-25 18:40:55,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 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 18:40:55,505 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-11-25 18:40:55,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-25 18:40:55,505 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:40:55,505 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:40:55,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-25 18:40:55,505 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:40:55,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:40:55,506 INFO L85 PathProgramCache]: Analyzing trace with hash -716344598, now seen corresponding path program 1 times [2021-11-25 18:40:55,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:40:55,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015352704] [2021-11-25 18:40:55,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:55,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:40:55,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:40:55,564 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-25 18:40:55,564 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:40:55,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015352704] [2021-11-25 18:40:55,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015352704] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:40:55,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243629551] [2021-11-25 18:40:55,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:55,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:40:55,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:40:55,566 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:40:55,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-25 18:40:55,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:40:55,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 18:40:55,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:40:55,806 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-25 18:40:55,806 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:40:55,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243629551] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:40:55,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:40:55,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-25 18:40:55,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638787224] [2021-11-25 18:40:55,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:40:55,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:40:55,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:40:55,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:40:55,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:40:55,808 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 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 18:40:55,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:40:55,871 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2021-11-25 18:40:55,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:40:55,871 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 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 34 [2021-11-25 18:40:55,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:40:55,872 INFO L225 Difference]: With dead ends: 51 [2021-11-25 18:40:55,872 INFO L226 Difference]: Without dead ends: 51 [2021-11-25 18:40:55,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:40:55,872 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 42 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:40:55,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 25 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:40:55,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-25 18:40:55,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2021-11-25 18:40:55,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.175) internal successors, (47), 44 states have internal predecessors, (47), 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 18:40:55,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-11-25 18:40:55,875 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 34 [2021-11-25 18:40:55,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:40:55,875 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-11-25 18:40:55,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 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 18:40:55,875 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-11-25 18:40:55,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-25 18:40:55,876 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:40:55,876 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:40:55,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-25 18:40:56,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-25 18:40:56,076 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:40:56,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:40:56,077 INFO L85 PathProgramCache]: Analyzing trace with hash -716344597, now seen corresponding path program 1 times [2021-11-25 18:40:56,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:40:56,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774479320] [2021-11-25 18:40:56,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:56,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:40:56,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:40:56,167 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 18:40:56,167 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:40:56,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774479320] [2021-11-25 18:40:56,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774479320] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:40:56,168 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:40:56,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 18:40:56,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767816962] [2021-11-25 18:40:56,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:40:56,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:40:56,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:40:56,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:40:56,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:40:56,175 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 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 18:40:56,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:40:56,301 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2021-11-25 18:40:56,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:40:56,302 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 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 34 [2021-11-25 18:40:56,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:40:56,302 INFO L225 Difference]: With dead ends: 49 [2021-11-25 18:40:56,302 INFO L226 Difference]: Without dead ends: 49 [2021-11-25 18:40:56,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-25 18:40:56,303 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 118 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:40:56,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 9 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:40:56,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-25 18:40:56,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2021-11-25 18:40:56,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.146341463414634) internal successors, (47), 45 states have internal predecessors, (47), 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 18:40:56,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2021-11-25 18:40:56,304 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 34 [2021-11-25 18:40:56,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:40:56,305 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2021-11-25 18:40:56,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 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 18:40:56,305 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2021-11-25 18:40:56,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-25 18:40:56,305 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:40:56,305 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:40:56,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-25 18:40:56,305 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:40:56,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:40:56,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1212364125, now seen corresponding path program 1 times [2021-11-25 18:40:56,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:40:56,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936637566] [2021-11-25 18:40:56,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:56,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:40:56,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:40:56,388 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 18:40:56,389 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:40:56,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936637566] [2021-11-25 18:40:56,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936637566] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:40:56,389 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:40:56,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 18:40:56,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218549194] [2021-11-25 18:40:56,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:40:56,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:40:56,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:40:56,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:40:56,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:40:56,391 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:40:56,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:40:56,497 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2021-11-25 18:40:56,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:40:56,498 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-25 18:40:56,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:40:56,498 INFO L225 Difference]: With dead ends: 47 [2021-11-25 18:40:56,498 INFO L226 Difference]: Without dead ends: 47 [2021-11-25 18:40:56,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-25 18:40:56,499 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 107 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:40:56,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 12 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:40:56,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-25 18:40:56,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-11-25 18:40:56,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 46 states have internal predecessors, (48), 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 18:40:56,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2021-11-25 18:40:56,503 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 36 [2021-11-25 18:40:56,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:40:56,503 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2021-11-25 18:40:56,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:40:56,504 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2021-11-25 18:40:56,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-25 18:40:56,504 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:40:56,504 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:40:56,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-25 18:40:56,505 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:40:56,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:40:56,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1159493043, now seen corresponding path program 1 times [2021-11-25 18:40:56,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:40:56,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391523843] [2021-11-25 18:40:56,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:56,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:40:56,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:40:56,735 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 18:40:56,736 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:40:56,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391523843] [2021-11-25 18:40:56,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391523843] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:40:56,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015543581] [2021-11-25 18:40:56,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:56,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:40:56,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:40:56,738 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:40:56,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-25 18:40:56,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:40:56,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-25 18:40:56,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:40:57,031 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:40:57,031 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 18:40:57,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:40:57,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:57,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2021-11-25 18:40:57,388 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:40:57,388 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2021-11-25 18:40:57,524 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:40:57,525 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 26 treesize of output 22 [2021-11-25 18:40:57,572 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 18:40:57,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:40:57,677 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2006 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_2006) |c_ULTIMATE.start_main_~s~0#1.base|) 4) 0))) is different from false [2021-11-25 18:40:57,687 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2006 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) (+ 4 |c_ULTIMATE.start_sll_update_at_~head#1.offset|)) v_ArrVal_2006) |c_ULTIMATE.start_main_~s~0#1.base|) 4) 0))) is different from false [2021-11-25 18:40:57,697 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2006 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) v_ArrVal_2006) |c_ULTIMATE.start_main_~s~0#1.base|) 4) 0))) is different from false [2021-11-25 18:40:57,705 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2006 (Array Int Int)) (v_ArrVal_2005 Int)) (not (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) |c_ULTIMATE.start_sll_update_at_~head#1.offset| v_ArrVal_2005)))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) v_ArrVal_2006)) |c_ULTIMATE.start_main_~s~0#1.base|) 4) 0))) is different from false [2021-11-25 18:40:57,725 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_105| Int) (v_ArrVal_2006 (Array Int Int)) (v_ArrVal_2005 Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_105|) (not (= (select (select (let ((.cse0 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_105| v_ArrVal_2005))) (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base| .cse0) (select .cse0 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) v_ArrVal_2006)) |c_ULTIMATE.start_main_~s~0#1.base|) 4) 0)))) is different from false [2021-11-25 18:40:57,746 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_105| Int) (v_ArrVal_2006 (Array Int Int)) (v_ArrVal_2005 Int)) (or (not (= 0 (select (select (let ((.cse0 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_105| v_ArrVal_2005))) (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse0) (select .cse0 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4)) v_ArrVal_2006)) |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4))) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_105|))) is different from false [2021-11-25 18:40:57,757 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:40:57,757 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 38 [2021-11-25 18:40:57,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:57,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:57,766 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:40:57,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 30 [2021-11-25 18:40:57,774 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:40:57,774 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 35 treesize of output 35 [2021-11-25 18:40:57,777 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 18:40:57,906 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 18:40:57,906 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 18:40:57,915 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 8 not checked. [2021-11-25 18:40:57,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015543581] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:40:57,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1243907522] [2021-11-25 18:40:57,917 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2021-11-25 18:40:57,917 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:40:57,917 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:40:57,918 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:40:57,918 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:40:57,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:57,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:57,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:40:57,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:57,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:40:57,976 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 18:40:57,985 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 18:40:58,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:58,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 18:40:58,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:58,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:58,010 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 26 treesize of output 28 [2021-11-25 18:40:58,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:58,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 18:40:58,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:58,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:58,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:58,056 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 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-25 18:40:58,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:58,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:40:58,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:58,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:40:58,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:58,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:58,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:58,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:58,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:58,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:40:58,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:58,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:58,185 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:40:58,185 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 2 case distinctions, treesize of input 297 treesize of output 279 [2021-11-25 18:40:58,219 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:40:58,219 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 291 treesize of output 298 [2021-11-25 18:40:58,250 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:40:58,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 285 treesize of output 292 [2021-11-25 18:40:58,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:58,380 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:40:58,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 318 treesize of output 319 [2021-11-25 18:40:58,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:58,419 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:40:58,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 299 treesize of output 300 [2021-11-25 18:40:58,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:58,460 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:40:58,460 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 308 treesize of output 309 [2021-11-25 18:40:58,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:58,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:58,731 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-25 18:40:58,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 320 treesize of output 313 [2021-11-25 18:40:58,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:58,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:58,758 INFO L354 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2021-11-25 18:40:58,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 404 treesize of output 397 [2021-11-25 18:40:58,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:58,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:58,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:58,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:58,779 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-25 18:40:58,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 450 treesize of output 435 [2021-11-25 18:40:58,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:58,896 INFO L354 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2021-11-25 18:40:58,896 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 8 case distinctions, treesize of input 435 treesize of output 430 [2021-11-25 18:40:59,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:59,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:59,070 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:40:59,070 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 2 case distinctions, treesize of input 297 treesize of output 279 [2021-11-25 18:40:59,106 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:40:59,107 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 291 treesize of output 298 [2021-11-25 18:40:59,138 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:40:59,138 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 285 treesize of output 292 [2021-11-25 18:40:59,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:59,283 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:40:59,283 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 318 treesize of output 319 [2021-11-25 18:40:59,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:59,322 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:40:59,322 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 312 treesize of output 313 [2021-11-25 18:40:59,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:59,362 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:40:59,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 293 treesize of output 294 [2021-11-25 18:40:59,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:59,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:59,594 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-25 18:40:59,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 320 treesize of output 313 [2021-11-25 18:40:59,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:59,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:59,622 INFO L354 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2021-11-25 18:40:59,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 362 treesize of output 355 [2021-11-25 18:40:59,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:59,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:59,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:59,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:59,642 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-25 18:40:59,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 450 treesize of output 435 [2021-11-25 18:40:59,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:40:59,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:40:59,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:40:59,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:41:00,016 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-25 18:41:00,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 146 treesize of output 144 [2021-11-25 18:41:00,042 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-25 18:41:00,042 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 140 treesize of output 138 [2021-11-25 18:41:00,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:41:00,673 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 0 case distinctions, treesize of input 16 treesize of output 13 [2021-11-25 18:41:00,731 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 0 case distinctions, treesize of input 16 treesize of output 13 [2021-11-25 18:41:00,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:41:00,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:41:00,919 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:41:05,679 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6582#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_destroy_#in~head#1.offset| 0) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= 0 |ULTIMATE.start_sll_destroy_#in~head#1.offset|) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_sll_destroy_~head#1.base| 0) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (or (and (= |ULTIMATE.start_sll_destroy_~head#1.base| |ULTIMATE.start_sll_destroy_#in~head#1.base|) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (= |ULTIMATE.start_sll_destroy_#in~head#1.base| |ULTIMATE.start_main_~s~0#1.base|) (= |#NULL.base| 0)) (and (= |ULTIMATE.start_sll_destroy_~temp~1#1.offset| |ULTIMATE.start_sll_destroy_~head#1.offset|) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (= |ULTIMATE.start_sll_destroy_~temp~1#1.base| |ULTIMATE.start_sll_destroy_~head#1.base|) (exists ((|v_ULTIMATE.start_sll_destroy_~head#1.base_23| Int)) (and (< |v_ULTIMATE.start_sll_destroy_~head#1.base_23| |#StackHeapBarrier|) (= (select |#valid| |v_ULTIMATE.start_sll_destroy_~head#1.base_23|) 0))) (= |#NULL.base| 0))) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |ULTIMATE.start_sll_destroy_~head#1.offset| 0) (= |ULTIMATE.start_main_#res#1| 0))' at error location [2021-11-25 18:41:05,680 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:41:05,680 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:41:05,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 18] total 36 [2021-11-25 18:41:05,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995160073] [2021-11-25 18:41:05,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:41:05,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-25 18:41:05,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:41:05,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-25 18:41:05,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=2173, Unknown=6, NotChecked=594, Total=2970 [2021-11-25 18:41:05,682 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 36 states, 36 states have (on average 2.388888888888889) internal successors, (86), 36 states have internal predecessors, (86), 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 18:41:05,915 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4)))) (and (not (= .cse0 0)) (= (select |c_#valid| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 1) (not (= |c_ULTIMATE.start_sll_create_~head~0#1.base| 0)) (= |c_ULTIMATE.start_node_create_~temp~0#1.offset| 0) (not (= |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse0)) (not (= |c_ULTIMATE.start_sll_create_~new_head~0#1.base| 0)) (= |c_ULTIMATE.start_sll_create_~head~0#1.offset| 0) (= (select |c_#valid| 0) 0) (= |c_ULTIMATE.start_sll_create_~new_head~0#1.offset| 0) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_105| Int) (v_ArrVal_2006 (Array Int Int)) (v_ArrVal_2005 Int)) (or (not (= 0 (select (select (let ((.cse1 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_105| v_ArrVal_2005))) (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse1) (select .cse1 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4)) v_ArrVal_2006)) |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4))) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_105|))) (not (= |c_ULTIMATE.start_node_create_~temp~0#1.base| 0)))) is different from false [2021-11-25 18:41:05,918 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) 4))) (and (not (= 0 .cse0)) (not (= |c_ULTIMATE.start_main_~s~0#1.base| .cse0)) (= (select |c_#valid| 0) 0) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_105| Int) (v_ArrVal_2006 (Array Int Int)) (v_ArrVal_2005 Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_105|) (not (= (select (select (let ((.cse1 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_105| v_ArrVal_2005))) (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base| .cse1) (select .cse1 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) v_ArrVal_2006)) |c_ULTIMATE.start_main_~s~0#1.base|) 4) 0)))) (= |c_ULTIMATE.start_main_~s~0#1.offset| 0))) is different from false [2021-11-25 18:41:06,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:41:06,757 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2021-11-25 18:41:06,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-25 18:41:06,758 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.388888888888889) internal successors, (86), 36 states have internal predecessors, (86), 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 39 [2021-11-25 18:41:06,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:41:06,758 INFO L225 Difference]: With dead ends: 56 [2021-11-25 18:41:06,758 INFO L226 Difference]: Without dead ends: 56 [2021-11-25 18:41:06,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 1076 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=456, Invalid=4258, Unknown=10, NotChecked=1128, Total=5852 [2021-11-25 18:41:06,761 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 161 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 301 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:41:06,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 67 Invalid, 976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 635 Invalid, 0 Unknown, 301 Unchecked, 0.3s Time] [2021-11-25 18:41:06,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-25 18:41:06,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 49. [2021-11-25 18:41:06,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 48 states have internal predecessors, (50), 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 18:41:06,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2021-11-25 18:41:06,763 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 39 [2021-11-25 18:41:06,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:41:06,764 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2021-11-25 18:41:06,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.388888888888889) internal successors, (86), 36 states have internal predecessors, (86), 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 18:41:06,764 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2021-11-25 18:41:06,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-25 18:41:06,765 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:41:06,765 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:41:06,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-25 18:41:06,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-25 18:41:06,989 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:41:06,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:41:06,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1159494269, now seen corresponding path program 1 times [2021-11-25 18:41:06,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:41:06,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67037332] [2021-11-25 18:41:06,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:41:06,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:41:07,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:41:07,450 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 18:41:07,450 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:41:07,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67037332] [2021-11-25 18:41:07,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67037332] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:41:07,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463280812] [2021-11-25 18:41:07,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:41:07,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:41:07,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:41:07,458 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:41:07,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-25 18:41:07,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:41:07,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 65 conjunts are in the unsatisfiable core [2021-11-25 18:41:07,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:41:07,706 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:41:07,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-25 18:41:07,739 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 18:41:07,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:07,832 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 0 case distinctions, treesize of input 20 treesize of output 19 [2021-11-25 18:41:07,930 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:41:07,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2021-11-25 18:41:08,067 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:41:08,067 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 27 treesize of output 23 [2021-11-25 18:41:08,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 18:41:08,155 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 18:41:08,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:41:08,336 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:41:08,336 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 31 treesize of output 35 [2021-11-25 18:41:08,363 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2117 (Array Int Int))) (= |c_ULTIMATE.start_sll_update_at_~head#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_2117) |c_ULTIMATE.start_main_~s~0#1.base|) 4))) (forall ((v_prenex_3 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_prenex_3) |c_ULTIMATE.start_main_~s~0#1.base|) 4) |c_ULTIMATE.start_main_~s~0#1.base|)))) is different from false [2021-11-25 18:41:08,382 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_prenex_3 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) (+ 4 |c_ULTIMATE.start_sll_update_at_~head#1.offset|)) v_prenex_3) |c_ULTIMATE.start_main_~s~0#1.base|) 4) |c_ULTIMATE.start_main_~s~0#1.base|))) (forall ((v_ArrVal_2117 (Array Int Int))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) (+ 4 |c_ULTIMATE.start_sll_update_at_~head#1.offset|)))) (= (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_2117) |c_ULTIMATE.start_main_~s~0#1.base|) 4) .cse0)))) is different from false [2021-11-25 18:41:08,402 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2117 (Array Int Int))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)))) (= (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_2117) |c_ULTIMATE.start_main_~s~0#1.base|) 4) .cse0))) (forall ((v_prenex_3 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) v_prenex_3) |c_ULTIMATE.start_main_~s~0#1.base|) 4) |c_ULTIMATE.start_main_~s~0#1.base|)))) is different from false [2021-11-25 18:41:08,415 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2117 (Array Int Int)) (v_ArrVal_2116 Int)) (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) |c_ULTIMATE.start_sll_update_at_~head#1.offset| v_ArrVal_2116)))) (let ((.cse0 (select (select .cse1 |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)))) (= .cse0 (select (select (store .cse1 .cse0 v_ArrVal_2117) |c_ULTIMATE.start_main_~s~0#1.base|) 4))))) (forall ((v_ArrVal_2116 Int) (v_prenex_3 (Array Int Int))) (not (= (select (select (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) |c_ULTIMATE.start_sll_update_at_~head#1.offset| v_ArrVal_2116)))) (store .cse2 (select (select .cse2 |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) v_prenex_3)) |c_ULTIMATE.start_main_~s~0#1.base|) 4) |c_ULTIMATE.start_main_~s~0#1.base|)))) is different from false [2021-11-25 18:41:08,460 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_114| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_114|) (and (forall ((v_ArrVal_2116 Int) (v_prenex_3 (Array Int Int))) (not (= (select (select (let ((.cse0 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_114| v_ArrVal_2116))) (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base| .cse0) (select .cse0 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) v_prenex_3)) |c_ULTIMATE.start_main_~s~0#1.base|) 4) |c_ULTIMATE.start_main_~s~0#1.base|))) (forall ((v_ArrVal_2117 (Array Int Int)) (v_ArrVal_2116 Int)) (let ((.cse1 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_114| v_ArrVal_2116))) (let ((.cse2 (select .cse1 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)))) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base| .cse1) .cse2 v_ArrVal_2117) |c_ULTIMATE.start_main_~s~0#1.base|) 4) .cse2))))))) is different from false [2021-11-25 18:41:08,500 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_114| Int)) (or (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_114|) (and (forall ((v_ArrVal_2117 (Array Int Int)) (v_ArrVal_2116 Int)) (let ((.cse0 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_114| v_ArrVal_2116))) (let ((.cse1 (select .cse0 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4)))) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse0) .cse1 v_ArrVal_2117) |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4) .cse1)))) (forall ((v_ArrVal_2116 Int) (v_prenex_3 (Array Int Int))) (not (= (select (select (let ((.cse2 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_114| v_ArrVal_2116))) (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse2) (select .cse2 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4)) v_prenex_3)) |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4) |c_ULTIMATE.start_sll_create_~head~0#1.base|)))))) is different from false [2021-11-25 18:41:08,517 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:41:08,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 90 treesize of output 87 [2021-11-25 18:41:08,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:08,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:08,532 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:41:08,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 51 treesize of output 59 [2021-11-25 18:41:08,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:08,551 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:41:08,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 75 [2021-11-25 18:41:08,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:08,569 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:41:08,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 91 [2021-11-25 18:41:08,578 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 38 treesize of output 36 [2021-11-25 18:41:08,586 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 36 treesize of output 34 [2021-11-25 18:41:08,711 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 8 not checked. [2021-11-25 18:41:08,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463280812] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:41:08,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [159186934] [2021-11-25 18:41:08,719 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2021-11-25 18:41:08,720 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:41:08,722 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:41:08,722 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:41:08,722 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:41:08,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:08,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:08,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:41:08,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:08,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:41:08,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:41:08,807 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 18:41:08,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:08,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 18:41:08,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:08,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 18:41:08,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:08,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:08,859 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 26 treesize of output 28 [2021-11-25 18:41:08,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:08,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:41:08,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:08,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:41:08,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:08,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:08,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:08,916 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 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-25 18:41:08,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:08,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:08,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:08,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:08,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:08,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:41:09,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:09,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:09,048 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:41:09,049 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 2 case distinctions, treesize of input 297 treesize of output 279 [2021-11-25 18:41:09,107 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:41:09,107 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 291 treesize of output 298 [2021-11-25 18:41:09,154 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:41:09,154 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 285 treesize of output 292 [2021-11-25 18:41:09,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:09,306 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:41:09,307 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 318 treesize of output 319 [2021-11-25 18:41:09,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:09,347 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:41:09,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 299 treesize of output 300 [2021-11-25 18:41:09,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:09,389 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:41:09,389 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 308 treesize of output 309 [2021-11-25 18:41:09,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:09,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:09,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:09,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:09,660 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 18:41:09,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 305 treesize of output 290 [2021-11-25 18:41:09,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:09,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:09,686 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 18:41:09,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 301 treesize of output 294 [2021-11-25 18:41:09,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:09,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:09,712 INFO L354 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2021-11-25 18:41:09,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 379 treesize of output 372 [2021-11-25 18:41:09,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:09,843 INFO L354 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2021-11-25 18:41:09,843 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 8 case distinctions, treesize of input 380 treesize of output 383 [2021-11-25 18:41:10,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:10,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:10,030 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:41:10,031 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 2 case distinctions, treesize of input 297 treesize of output 279 [2021-11-25 18:41:10,065 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:41:10,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 291 treesize of output 298 [2021-11-25 18:41:10,100 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:41:10,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 285 treesize of output 292 [2021-11-25 18:41:10,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:10,248 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:41:10,248 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 318 treesize of output 319 [2021-11-25 18:41:10,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:10,291 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:41:10,291 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 312 treesize of output 313 [2021-11-25 18:41:10,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:10,334 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:41:10,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 293 treesize of output 294 [2021-11-25 18:41:10,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:10,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:10,643 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-25 18:41:10,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 320 treesize of output 313 [2021-11-25 18:41:10,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:10,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:10,671 INFO L354 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2021-11-25 18:41:10,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 404 treesize of output 397 [2021-11-25 18:41:10,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:10,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:10,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:10,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:10,693 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-25 18:41:10,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 450 treesize of output 435 [2021-11-25 18:41:10,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:41:10,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:41:10,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:41:11,039 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-25 18:41:11,039 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 146 treesize of output 144 [2021-11-25 18:41:11,066 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-25 18:41:11,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 140 treesize of output 138 [2021-11-25 18:41:11,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:41:11,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:41:11,721 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 0 case distinctions, treesize of input 16 treesize of output 13 [2021-11-25 18:41:11,786 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 0 case distinctions, treesize of input 16 treesize of output 13 [2021-11-25 18:41:11,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:41:11,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:41:11,991 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:41:16,672 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7015#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_destroy_#in~head#1.offset| 0) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 2 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (not (= (select |#valid| |ULTIMATE.start_sll_destroy_~head#1.base|) 1)) (<= 0 |ULTIMATE.start_sll_destroy_#in~head#1.offset|) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2021-11-25 18:41:16,673 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:41:16,673 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:41:16,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 15] total 32 [2021-11-25 18:41:16,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832756055] [2021-11-25 18:41:16,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:41:16,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-25 18:41:16,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:41:16,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-25 18:41:16,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1823, Unknown=6, NotChecked=546, Total=2550 [2021-11-25 18:41:16,676 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 33 states, 32 states have (on average 2.3125) internal successors, (74), 33 states have internal predecessors, (74), 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 18:41:16,852 WARN L838 $PredicateComparison]: unable to prove that (and (= (select |c_#valid| |c_ULTIMATE.start_node_create_~temp~0#1.base|) 1) (= (select |c_#valid| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 1) (= |c_ULTIMATE.start_node_create_~temp~0#1.offset| 0) (= |c_ULTIMATE.start_sll_create_~head~0#1.offset| 0) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_114| Int)) (or (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_114|) (and (forall ((v_ArrVal_2117 (Array Int Int)) (v_ArrVal_2116 Int)) (let ((.cse0 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_114| v_ArrVal_2116))) (let ((.cse1 (select .cse0 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4)))) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse0) .cse1 v_ArrVal_2117) |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4) .cse1)))) (forall ((v_ArrVal_2116 Int) (v_prenex_3 (Array Int Int))) (not (= (select (select (let ((.cse2 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_114| v_ArrVal_2116))) (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse2) (select .cse2 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4)) v_prenex_3)) |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4) |c_ULTIMATE.start_sll_create_~head~0#1.base|)))))) (= (select |c_#valid| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) 1) (not (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4) |c_ULTIMATE.start_sll_create_~head~0#1.base|))) is different from false [2021-11-25 18:41:16,856 WARN L838 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_main_~s~0#1.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) 4))) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_114| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_114|) (and (forall ((v_ArrVal_2116 Int) (v_prenex_3 (Array Int Int))) (not (= (select (select (let ((.cse0 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_114| v_ArrVal_2116))) (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base| .cse0) (select .cse0 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) v_prenex_3)) |c_ULTIMATE.start_main_~s~0#1.base|) 4) |c_ULTIMATE.start_main_~s~0#1.base|))) (forall ((v_ArrVal_2117 (Array Int Int)) (v_ArrVal_2116 Int)) (let ((.cse1 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_114| v_ArrVal_2116))) (let ((.cse2 (select .cse1 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)))) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base| .cse1) .cse2 v_ArrVal_2117) |c_ULTIMATE.start_main_~s~0#1.base|) 4) .cse2))))))) (= |c_ULTIMATE.start_main_~s~0#1.offset| 0)) is different from false [2021-11-25 18:41:17,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:41:17,446 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2021-11-25 18:41:17,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-25 18:41:17,447 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.3125) internal successors, (74), 33 states have internal predecessors, (74), 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 39 [2021-11-25 18:41:17,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:41:17,447 INFO L225 Difference]: With dead ends: 55 [2021-11-25 18:41:17,447 INFO L226 Difference]: Without dead ends: 55 [2021-11-25 18:41:17,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 83 SyntacticMatches, 8 SemanticMatches, 64 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 953 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=301, Invalid=3029, Unknown=8, NotChecked=952, Total=4290 [2021-11-25 18:41:17,449 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 84 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 316 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:41:17,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 83 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 554 Invalid, 0 Unknown, 316 Unchecked, 0.3s Time] [2021-11-25 18:41:17,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-25 18:41:17,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2021-11-25 18:41:17,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 49 states have internal predecessors, (52), 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 18:41:17,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2021-11-25 18:41:17,452 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 39 [2021-11-25 18:41:17,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:41:17,453 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2021-11-25 18:41:17,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.3125) internal successors, (74), 33 states have internal predecessors, (74), 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 18:41:17,453 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2021-11-25 18:41:17,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-25 18:41:17,454 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:41:17,454 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:41:17,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-25 18:41:17,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:41:17,674 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:41:17,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:41:17,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1159494268, now seen corresponding path program 1 times [2021-11-25 18:41:17,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:41:17,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727131744] [2021-11-25 18:41:17,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:41:17,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:41:17,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:41:18,591 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:41:18,591 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:41:18,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727131744] [2021-11-25 18:41:18,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727131744] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:41:18,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499840153] [2021-11-25 18:41:18,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:41:18,592 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:41:18,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:41:18,598 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:41:18,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-25 18:41:18,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:41:18,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 87 conjunts are in the unsatisfiable core [2021-11-25 18:41:18,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:41:18,986 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:41:18,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-25 18:41:18,992 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 14 treesize of output 16 [2021-11-25 18:41:19,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:41:19,138 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 18:41:19,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:19,389 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 18 [2021-11-25 18:41:19,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:19,395 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 0 case distinctions, treesize of input 29 treesize of output 24 [2021-11-25 18:41:19,602 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:41:19,602 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-11-25 18:41:19,607 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 18 treesize of output 20 [2021-11-25 18:41:19,807 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:41:19,807 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 27 treesize of output 23 [2021-11-25 18:41:19,816 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:41:19,816 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-11-25 18:41:19,931 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 18:41:19,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:41:20,251 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2235 (Array Int Int)) (v_ArrVal_2234 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_2234) |c_ULTIMATE.start_main_~s~0#1.base|) 4) 8) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_2235) |c_ULTIMATE.start_main_~s~0#1.base|) 4)))) (forall ((v_ArrVal_2234 (Array Int Int))) (<= 0 (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_2234) |c_ULTIMATE.start_main_~s~0#1.base|) 4) 4)))) is different from false [2021-11-25 18:41:20,285 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2235 (Array Int Int)) (v_ArrVal_2234 (Array Int Int))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) (+ 4 |c_ULTIMATE.start_sll_update_at_~head#1.offset|)))) (<= (+ 8 (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_2234) |c_ULTIMATE.start_main_~s~0#1.base|) 4)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_2235) |c_ULTIMATE.start_main_~s~0#1.base|) 4))))) (forall ((v_ArrVal_2234 (Array Int Int))) (<= 0 (+ 4 (select (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) (+ 4 |c_ULTIMATE.start_sll_update_at_~head#1.offset|)) v_ArrVal_2234) |c_ULTIMATE.start_main_~s~0#1.base|) 4))))) is different from false [2021-11-25 18:41:20,309 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2234 (Array Int Int))) (<= 0 (+ (select (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) v_ArrVal_2234) |c_ULTIMATE.start_main_~s~0#1.base|) 4) 4))) (forall ((v_ArrVal_2235 (Array Int Int)) (v_ArrVal_2234 (Array Int Int))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_2234) |c_ULTIMATE.start_main_~s~0#1.base|) 4) 8) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_2235) |c_ULTIMATE.start_main_~s~0#1.base|) 4)))))) is different from false [2021-11-25 18:41:20,328 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2231 Int) (v_ArrVal_2233 Int) (v_ArrVal_2235 (Array Int Int)) (v_ArrVal_2234 (Array Int Int))) (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) |c_ULTIMATE.start_sll_update_at_~head#1.offset| v_ArrVal_2233)))) (let ((.cse0 (select (select .cse1 |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)))) (<= (+ (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base|) |c_ULTIMATE.start_sll_update_at_~head#1.offset| v_ArrVal_2231)) .cse0 v_ArrVal_2234) |c_ULTIMATE.start_main_~s~0#1.base|) 4) 8) (select |c_#length| (select (select (store .cse1 .cse0 v_ArrVal_2235) |c_ULTIMATE.start_main_~s~0#1.base|) 4)))))) (forall ((v_ArrVal_2231 Int) (v_ArrVal_2233 Int) (v_ArrVal_2234 (Array Int Int))) (<= 0 (+ (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base|) |c_ULTIMATE.start_sll_update_at_~head#1.offset| v_ArrVal_2231)) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) |c_ULTIMATE.start_sll_update_at_~head#1.offset| v_ArrVal_2233)) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) v_ArrVal_2234) |c_ULTIMATE.start_main_~s~0#1.base|) 4) 4)))) is different from false [2021-11-25 18:41:20,385 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_123| Int)) (or (and (forall ((v_ArrVal_2231 Int) (v_ArrVal_2233 Int) (v_ArrVal_2235 (Array Int Int)) (v_ArrVal_2234 (Array Int Int))) (let ((.cse1 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_123| v_ArrVal_2233))) (let ((.cse0 (select .cse1 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)))) (<= (+ (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_123| v_ArrVal_2231)) .cse0 v_ArrVal_2234) |c_ULTIMATE.start_main_~s~0#1.base|) 4) 8) (select |c_#length| (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base| .cse1) .cse0 v_ArrVal_2235) |c_ULTIMATE.start_main_~s~0#1.base|) 4)))))) (forall ((v_ArrVal_2231 Int) (v_ArrVal_2233 Int) (v_ArrVal_2234 (Array Int Int))) (<= 0 (+ (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_123| v_ArrVal_2231)) (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_123| v_ArrVal_2233) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) v_ArrVal_2234) |c_ULTIMATE.start_main_~s~0#1.base|) 4) 4)))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_123|))) is different from false [2021-11-25 18:41:20,435 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_123| Int)) (or (and (forall ((v_ArrVal_2231 Int) (v_ArrVal_2233 Int) (v_ArrVal_2234 (Array Int Int))) (<= 0 (+ (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_123| v_ArrVal_2231)) (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_123| v_ArrVal_2233) (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4)) v_ArrVal_2234) |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4) 4))) (forall ((v_ArrVal_2231 Int) (v_ArrVal_2233 Int) (v_ArrVal_2235 (Array Int Int)) (v_ArrVal_2234 (Array Int Int))) (let ((.cse1 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_123| v_ArrVal_2233))) (let ((.cse0 (select .cse1 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4)))) (<= (+ (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_123| v_ArrVal_2231)) .cse0 v_ArrVal_2234) |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4) 8) (select |c_#length| (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse1) .cse0 v_ArrVal_2235) |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4))))))) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_123|))) is different from false [2021-11-25 18:41:20,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:20,459 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:41:20,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 115 treesize of output 126 [2021-11-25 18:41:20,468 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:41:20,468 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 126 treesize of output 121 [2021-11-25 18:41:20,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:20,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:20,478 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:41:20,479 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 2 case distinctions, treesize of input 85 treesize of output 89 [2021-11-25 18:41:20,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:20,494 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:41:20,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 112 treesize of output 116 [2021-11-25 18:41:20,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:20,510 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:41:20,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 150 treesize of output 150 [2021-11-25 18:41:20,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:20,527 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:41:20,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 168 [2021-11-25 18:41:20,536 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 89 treesize of output 85 [2021-11-25 18:41:20,541 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 85 treesize of output 81 [2021-11-25 18:41:20,547 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 81 treesize of output 79 [2021-11-25 18:41:20,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:20,949 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 25 treesize of output 21 [2021-11-25 18:41:20,955 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 18:41:20,956 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 18:41:21,037 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 8 not checked. [2021-11-25 18:41:21,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499840153] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:41:21,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1568065054] [2021-11-25 18:41:21,039 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2021-11-25 18:41:21,039 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:41:21,039 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:41:21,039 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:41:21,040 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:41:21,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:21,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:21,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:41:21,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:21,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:41:21,134 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 18:41:21,139 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 18:41:21,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:21,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:21,164 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 26 treesize of output 28 [2021-11-25 18:41:21,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:21,174 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 25 treesize of output 13 [2021-11-25 18:41:21,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:21,187 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 25 treesize of output 13 [2021-11-25 18:41:21,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:21,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:41:21,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:21,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:41:21,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:21,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:21,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:21,235 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 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-25 18:41:21,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:21,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:21,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:21,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:21,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:21,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:41:21,371 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:41:21,371 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 284 treesize of output 291 [2021-11-25 18:41:21,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:21,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:21,390 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:41:21,390 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 2 case distinctions, treesize of input 284 treesize of output 266 [2021-11-25 18:41:21,427 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:41:21,428 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 278 treesize of output 285 [2021-11-25 18:41:21,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:21,572 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:41:21,572 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 311 treesize of output 312 [2021-11-25 18:41:21,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:21,615 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:41:21,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 292 treesize of output 293 [2021-11-25 18:41:21,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:21,656 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:41:21,657 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 301 treesize of output 302 [2021-11-25 18:41:21,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:21,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:21,956 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 18:41:21,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 301 treesize of output 294 [2021-11-25 18:41:21,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:21,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:22,000 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 18:41:22,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 313 treesize of output 306 [2021-11-25 18:41:22,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:22,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:22,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:22,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:22,020 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-25 18:41:22,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 395 treesize of output 380 [2021-11-25 18:41:22,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:22,135 INFO L354 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2021-11-25 18:41:22,136 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 8 case distinctions, treesize of input 380 treesize of output 383 [2021-11-25 18:41:22,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:22,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:22,313 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:41:22,313 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 2 case distinctions, treesize of input 290 treesize of output 272 [2021-11-25 18:41:22,347 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:41:22,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 284 treesize of output 291 [2021-11-25 18:41:22,382 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:41:22,382 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 278 treesize of output 285 [2021-11-25 18:41:22,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:22,523 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:41:22,524 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 311 treesize of output 312 [2021-11-25 18:41:22,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:22,568 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:41:22,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 292 treesize of output 293 [2021-11-25 18:41:22,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:22,610 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:41:22,611 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 301 treesize of output 302 [2021-11-25 18:41:22,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:22,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:22,917 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-25 18:41:22,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 313 treesize of output 306 [2021-11-25 18:41:22,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:22,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:22,949 INFO L354 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2021-11-25 18:41:22,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 349 treesize of output 342 [2021-11-25 18:41:22,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:22,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:22,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:22,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:22,973 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-25 18:41:22,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 431 treesize of output 416 [2021-11-25 18:41:23,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:41:23,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:41:23,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:41:23,233 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 15 treesize of output 1 [2021-11-25 18:41:23,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:41:23,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:41:23,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:41:23,817 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 0 case distinctions, treesize of input 16 treesize of output 13 [2021-11-25 18:41:23,889 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 0 case distinctions, treesize of input 16 treesize of output 13 [2021-11-25 18:41:24,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:41:24,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:41:24,054 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:41:28,821 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7454#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_destroy_#in~head#1.offset| 0) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 2 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (or (< (select |#length| |ULTIMATE.start_sll_destroy_~head#1.base|) (+ 8 |ULTIMATE.start_sll_destroy_~head#1.offset|)) (< (+ |ULTIMATE.start_sll_destroy_~head#1.offset| 4) 0)) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= 0 |ULTIMATE.start_sll_destroy_#in~head#1.offset|) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2021-11-25 18:41:28,821 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:41:28,822 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:41:28,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 16, 17] total 51 [2021-11-25 18:41:28,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950342942] [2021-11-25 18:41:28,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:41:28,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-25 18:41:28,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:41:28,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-25 18:41:28,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=3782, Unknown=6, NotChecked=774, Total=4830 [2021-11-25 18:41:28,824 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand has 52 states, 51 states have (on average 2.019607843137255) internal successors, (103), 52 states have internal predecessors, (103), 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 18:41:29,213 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|)) (.cse4 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4)) (.cse5 (select |c_#length| |c_ULTIMATE.start_sll_create_~head~0#1.base|))) (let ((.cse0 (= .cse5 8)) (.cse6 (select .cse2 .cse4)) (.cse3 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|))) (and (or .cse0 (= |c_ULTIMATE.start_node_create_~temp~0#1.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|)) .cse0 (let ((.cse1 (select .cse2 4))) (or (= .cse1 |c_ULTIMATE.start_sll_create_~head~0#1.base|) (= 8 (select |c_#length| .cse1)))) (= (select .cse3 .cse4) 0) (<= (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 8) .cse5) (= (select |c_#valid| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 1) (= 8 (select |c_#length| |c_ULTIMATE.start_node_create_~temp~0#1.base|)) (= |c_ULTIMATE.start_node_create_~temp~0#1.offset| 0) (not (= |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse6)) (= |c_ULTIMATE.start_sll_create_~head~0#1.offset| 0) (or .cse0 (= |c_ULTIMATE.start_sll_create_~head~0#1.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|)) (<= 8 (select |c_#length| .cse6)) (= (select |c_#length| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) 8) (= |c_ULTIMATE.start_sll_create_~new_head~0#1.offset| 0) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_123| Int)) (or (and (forall ((v_ArrVal_2231 Int) (v_ArrVal_2233 Int) (v_ArrVal_2234 (Array Int Int))) (<= 0 (+ (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_123| v_ArrVal_2231)) (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_123| v_ArrVal_2233) (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4)) v_ArrVal_2234) |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4) 4))) (forall ((v_ArrVal_2231 Int) (v_ArrVal_2233 Int) (v_ArrVal_2235 (Array Int Int)) (v_ArrVal_2234 (Array Int Int))) (let ((.cse8 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_123| v_ArrVal_2233))) (let ((.cse7 (select .cse8 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4)))) (<= (+ (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_123| v_ArrVal_2231)) .cse7 v_ArrVal_2234) |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4) 8) (select |c_#length| (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse8) .cse7 v_ArrVal_2235) |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4))))))) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_123|))) (= (select .cse3 4) 0)))) is different from false [2021-11-25 18:41:29,219 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse4 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) 4))) (let ((.cse1 (select |c_#length| .cse4)) (.cse0 (= |c_ULTIMATE.start_main_~s~0#1.base| .cse4))) (and (= |c_ULTIMATE.start_main_~i~0#1| 0) (not .cse0) (= 0 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) 4)) (<= 8 .cse1) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_123| Int)) (or (and (forall ((v_ArrVal_2231 Int) (v_ArrVal_2233 Int) (v_ArrVal_2235 (Array Int Int)) (v_ArrVal_2234 (Array Int Int))) (let ((.cse3 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_123| v_ArrVal_2233))) (let ((.cse2 (select .cse3 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)))) (<= (+ (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_123| v_ArrVal_2231)) .cse2 v_ArrVal_2234) |c_ULTIMATE.start_main_~s~0#1.base|) 4) 8) (select |c_#length| (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base| .cse3) .cse2 v_ArrVal_2235) |c_ULTIMATE.start_main_~s~0#1.base|) 4)))))) (forall ((v_ArrVal_2231 Int) (v_ArrVal_2233 Int) (v_ArrVal_2234 (Array Int Int))) (<= 0 (+ (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_123| v_ArrVal_2231)) (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_123| v_ArrVal_2233) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) v_ArrVal_2234) |c_ULTIMATE.start_main_~s~0#1.base|) 4) 4)))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_123|))) (or (= .cse1 8) .cse0) (= |c_ULTIMATE.start_main_~s~0#1.offset| 0)))) is different from false [2021-11-25 18:41:31,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:41:31,062 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2021-11-25 18:41:31,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-25 18:41:31,062 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 2.019607843137255) internal successors, (103), 52 states have internal predecessors, (103), 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 39 [2021-11-25 18:41:31,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:41:31,063 INFO L225 Difference]: With dead ends: 54 [2021-11-25 18:41:31,063 INFO L226 Difference]: Without dead ends: 54 [2021-11-25 18:41:31,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 67 SyntacticMatches, 4 SemanticMatches, 92 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=616, Invalid=6717, Unknown=9, NotChecked=1400, Total=8742 [2021-11-25 18:41:31,064 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 113 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 302 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:41:31,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 90 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 749 Invalid, 0 Unknown, 302 Unchecked, 0.5s Time] [2021-11-25 18:41:31,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-25 18:41:31,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2021-11-25 18:41:31,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 50 states have internal predecessors, (52), 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 18:41:31,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2021-11-25 18:41:31,067 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 39 [2021-11-25 18:41:31,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:41:31,067 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2021-11-25 18:41:31,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 2.019607843137255) internal successors, (103), 52 states have internal predecessors, (103), 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 18:41:31,068 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2021-11-25 18:41:31,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-25 18:41:31,068 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:41:31,069 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:41:31,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-25 18:41:31,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-25 18:41:31,278 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:41:31,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:41:31,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1877435652, now seen corresponding path program 1 times [2021-11-25 18:41:31,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:41:31,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843450846] [2021-11-25 18:41:31,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:41:31,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:41:31,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:41:31,809 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 18:41:31,809 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:41:31,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843450846] [2021-11-25 18:41:31,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843450846] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:41:31,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557321099] [2021-11-25 18:41:31,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:41:31,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:41:31,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:41:31,811 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:41:31,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-25 18:41:32,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:41:32,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-25 18:41:32,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:41:32,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:41:32,184 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:41:32,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-25 18:41:32,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:41:32,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:32,405 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 27 treesize of output 22 [2021-11-25 18:41:32,521 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:41:32,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2021-11-25 18:41:32,655 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:41:32,655 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 25 treesize of output 21 [2021-11-25 18:41:32,732 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 18:41:32,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:41:32,960 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2347 (Array Int Int))) (< (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_2347) |c_ULTIMATE.start_main_~s~0#1.base|) 4) |c_#StackHeapBarrier|)) is different from false [2021-11-25 18:41:32,969 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2347 (Array Int Int))) (< (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) (+ 4 |c_ULTIMATE.start_sll_update_at_~head#1.offset|)) v_ArrVal_2347) |c_ULTIMATE.start_main_~s~0#1.base|) 4) |c_#StackHeapBarrier|)) is different from false [2021-11-25 18:41:32,979 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2347 (Array Int Int))) (< (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) v_ArrVal_2347) |c_ULTIMATE.start_main_~s~0#1.base|) 4) |c_#StackHeapBarrier|)) is different from false [2021-11-25 18:41:32,986 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2347 (Array Int Int)) (v_ArrVal_2345 Int)) (< (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) |c_ULTIMATE.start_sll_update_at_~head#1.offset| v_ArrVal_2345)))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) v_ArrVal_2347)) |c_ULTIMATE.start_main_~s~0#1.base|) 4) |c_#StackHeapBarrier|)) is different from false [2021-11-25 18:41:33,005 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2347 (Array Int Int)) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_132| Int) (v_ArrVal_2345 Int)) (or (< (select (select (let ((.cse0 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_132| v_ArrVal_2345))) (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base| .cse0) (select .cse0 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) v_ArrVal_2347)) |c_ULTIMATE.start_main_~s~0#1.base|) 4) |c_#StackHeapBarrier|) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_132|))) is different from false [2021-11-25 18:41:33,019 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2347 (Array Int Int)) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_132| Int) (v_ArrVal_2345 Int)) (or (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_132|) (< (select (select (let ((.cse0 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_132| v_ArrVal_2345))) (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse0) (select .cse0 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4)) v_ArrVal_2347)) |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4) |c_#StackHeapBarrier|))) is different from false [2021-11-25 18:41:33,029 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:41:33,029 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 37 [2021-11-25 18:41:33,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:33,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:33,037 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:41:33,038 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 2 case distinctions, treesize of input 25 treesize of output 29 [2021-11-25 18:41:33,044 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:41:33,045 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 32 [2021-11-25 18:41:33,048 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 9 treesize of output 7 [2021-11-25 18:41:33,310 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 8 not checked. [2021-11-25 18:41:33,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557321099] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:41:33,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1172763951] [2021-11-25 18:41:33,313 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2021-11-25 18:41:33,313 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:41:33,313 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:41:33,313 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:41:33,314 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:41:33,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:33,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:33,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:41:33,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:41:33,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:33,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:41:33,401 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 18:41:33,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:33,448 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 25 treesize of output 13 [2021-11-25 18:41:33,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:33,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:33,461 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 26 treesize of output 28 [2021-11-25 18:41:33,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:33,474 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 25 treesize of output 13 [2021-11-25 18:41:33,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:33,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:33,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:33,498 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 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-25 18:41:33,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:33,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:41:33,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:33,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:41:33,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:33,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:33,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:33,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:33,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:33,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:41:33,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:33,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:33,628 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:41:33,629 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 2 case distinctions, treesize of input 297 treesize of output 279 [2021-11-25 18:41:33,668 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:41:33,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 291 treesize of output 298 [2021-11-25 18:41:33,705 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:41:33,705 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 285 treesize of output 292 [2021-11-25 18:41:33,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:33,939 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:41:33,939 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 576 treesize of output 577 [2021-11-25 18:41:33,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:33,989 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:41:33,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 557 treesize of output 538 [2021-11-25 18:41:34,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:34,037 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:41:34,037 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 562 treesize of output 563 [2021-11-25 18:41:34,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:34,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:34,366 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-25 18:41:34,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 322 treesize of output 315 [2021-11-25 18:41:34,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:34,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:34,410 INFO L354 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2021-11-25 18:41:34,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 406 treesize of output 399 [2021-11-25 18:41:34,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:34,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:34,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:34,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:34,449 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-25 18:41:34,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 452 treesize of output 437 [2021-11-25 18:41:34,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:34,595 INFO L354 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2021-11-25 18:41:34,595 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 8 case distinctions, treesize of input 437 treesize of output 432 [2021-11-25 18:41:34,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:34,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:34,783 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:41:34,783 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 2 case distinctions, treesize of input 297 treesize of output 279 [2021-11-25 18:41:34,818 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:41:34,819 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 291 treesize of output 298 [2021-11-25 18:41:34,856 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:41:34,857 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 285 treesize of output 292 [2021-11-25 18:41:35,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:35,190 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:41:35,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 989 treesize of output 938 [2021-11-25 18:41:35,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:35,247 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:41:35,248 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 986 treesize of output 981 [2021-11-25 18:41:35,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:35,305 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:41:35,306 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 974 treesize of output 969 [2021-11-25 18:41:35,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:35,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:35,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:35,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:35,869 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 18:41:35,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 304 treesize of output 289 [2021-11-25 18:41:35,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:35,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:35,901 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-25 18:41:35,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 300 treesize of output 293 [2021-11-25 18:41:35,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:35,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:35,929 INFO L354 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2021-11-25 18:41:35,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 366 treesize of output 359 [2021-11-25 18:41:36,056 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 18:41:36,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:41:36,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:41:36,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:41:36,254 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:41:36,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:41:36,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:41:36,834 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 0 case distinctions, treesize of input 16 treesize of output 13 [2021-11-25 18:41:36,915 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 0 case distinctions, treesize of input 16 treesize of output 13 [2021-11-25 18:41:37,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:41:37,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:41:37,090 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:41:41,835 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7908#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_destroy_#in~head#1.offset| 0) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 2 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= 0 |ULTIMATE.start_sll_destroy_#in~head#1.offset|) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= |#StackHeapBarrier| |ULTIMATE.start_sll_destroy_~head#1.base|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |ULTIMATE.start_sll_destroy_~head#1.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-25 18:41:41,835 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:41:41,835 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:41:41,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 17] total 40 [2021-11-25 18:41:41,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872092608] [2021-11-25 18:41:41,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:41:41,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-25 18:41:41,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:41:41,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-25 18:41:41,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=2455, Unknown=6, NotChecked=630, Total=3306 [2021-11-25 18:41:41,837 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 41 states, 40 states have (on average 2.325) internal successors, (93), 41 states have internal predecessors, (93), 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 18:41:42,299 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|))) (let ((.cse0 (select .cse1 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4)))) (and (< .cse0 |c_#StackHeapBarrier|) (= (select |c_#valid| |c_ULTIMATE.start_node_create_~temp~0#1.base|) 1) (= (select |c_#valid| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 1) (< |c_ULTIMATE.start_sll_create_~head~0#1.base| |c_#StackHeapBarrier|) (= |c_ULTIMATE.start_node_create_~temp~0#1.offset| |c_ULTIMATE.start_sll_create_~head~0#1.offset|) (= |c_ULTIMATE.start_node_create_~temp~0#1.offset| 0) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4) |c_ULTIMATE.start_sll_create_~head~0#1.offset|) (not (= |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse0)) (<= (+ (select .cse1 4) 1) |c_#StackHeapBarrier|) (= |c_ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= (+ |c_ULTIMATE.start_node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (<= (+ |c_ULTIMATE.start_sll_create_~new_head~0#1.base| 1) |c_#StackHeapBarrier|) (= |c_ULTIMATE.start_sll_create_~head~0#1.offset| |c_ULTIMATE.start_sll_create_~new_head~0#1.offset|) (= |c_ULTIMATE.start_sll_create_~new_head~0#1.offset| 0) (< |c_ULTIMATE.start_node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (forall ((v_ArrVal_2347 (Array Int Int)) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_132| Int) (v_ArrVal_2345 Int)) (or (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_132|) (< (select (select (let ((.cse2 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_132| v_ArrVal_2345))) (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse2) (select .cse2 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4)) v_ArrVal_2347)) |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4) |c_#StackHeapBarrier|))) (<= (+ |c_ULTIMATE.start_sll_create_~head~0#1.base| 1) |c_#StackHeapBarrier|)))) is different from false [2021-11-25 18:41:42,304 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) 4))) (and (not (= |c_ULTIMATE.start_main_~s~0#1.base| .cse0)) (forall ((v_ArrVal_2347 (Array Int Int)) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_132| Int) (v_ArrVal_2345 Int)) (or (< (select (select (let ((.cse1 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_132| v_ArrVal_2345))) (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base| .cse1) (select .cse1 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) v_ArrVal_2347)) |c_ULTIMATE.start_main_~s~0#1.base|) 4) |c_#StackHeapBarrier|) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_132|))) (< .cse0 |c_#StackHeapBarrier|) (= |c_ULTIMATE.start_main_~s~0#1.offset| (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) 4)) (<= (+ 1 .cse0) |c_#StackHeapBarrier|) (= |c_ULTIMATE.start_main_~s~0#1.offset| 0))) is different from false [2021-11-25 18:41:43,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:41:43,560 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2021-11-25 18:41:43,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-25 18:41:43,560 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.325) internal successors, (93), 41 states have internal predecessors, (93), 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 41 [2021-11-25 18:41:43,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:41:43,561 INFO L225 Difference]: With dead ends: 56 [2021-11-25 18:41:43,561 INFO L226 Difference]: Without dead ends: 56 [2021-11-25 18:41:43,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 79 SyntacticMatches, 9 SemanticMatches, 75 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 1064 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=448, Invalid=4266, Unknown=10, NotChecked=1128, Total=5852 [2021-11-25 18:41:43,562 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 125 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 332 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:41:43,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 137 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 561 Invalid, 0 Unknown, 332 Unchecked, 0.4s Time] [2021-11-25 18:41:43,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-25 18:41:43,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2021-11-25 18:41:43,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.127659574468085) internal successors, (53), 51 states have internal predecessors, (53), 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 18:41:43,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2021-11-25 18:41:43,565 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 41 [2021-11-25 18:41:43,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:41:43,565 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2021-11-25 18:41:43,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.325) internal successors, (93), 41 states have internal predecessors, (93), 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 18:41:43,566 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2021-11-25 18:41:43,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-25 18:41:43,566 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:41:43,566 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:41:43,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-25 18:41:43,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:41:43,767 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:41:43,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:41:43,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1621217452, now seen corresponding path program 2 times [2021-11-25 18:41:43,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:41:43,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662766658] [2021-11-25 18:41:43,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:41:43,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:41:43,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:41:44,904 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:41:44,905 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:41:44,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662766658] [2021-11-25 18:41:44,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662766658] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:41:44,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767935916] [2021-11-25 18:41:44,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:41:44,906 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:41:44,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:41:44,910 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:41:44,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-25 18:41:45,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 18:41:45,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:41:45,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 73 conjunts are in the unsatisfiable core [2021-11-25 18:41:45,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:41:45,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:41:45,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:41:45,683 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 52 treesize of output 39 [2021-11-25 18:41:45,895 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:41:45,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 52 [2021-11-25 18:41:46,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 26 [2021-11-25 18:41:46,394 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 18:41:46,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:41:46,598 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2462 (Array Int Int))) (= |c_ULTIMATE.start_main_old_#valid#1| (store (store |c_#valid| |c_ULTIMATE.start_main_~s~0#1.base| 0) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_2462) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) 0))) is different from false [2021-11-25 18:41:46,607 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2462 (Array Int Int))) (= (store (store |c_#valid| |c_ULTIMATE.start_main_~s~0#1.base| 0) (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) (+ 4 |c_ULTIMATE.start_sll_update_at_~head#1.offset|)) v_ArrVal_2462) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) 0) |c_ULTIMATE.start_main_old_#valid#1|)) is different from false [2021-11-25 18:41:46,616 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2462 (Array Int Int))) (= (store (store |c_#valid| |c_ULTIMATE.start_main_~s~0#1.base| 0) (let ((.cse0 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) .cse0) v_ArrVal_2462) |c_ULTIMATE.start_main_~s~0#1.base|) .cse0)) 0) |c_ULTIMATE.start_main_old_#valid#1|)) is different from false [2021-11-25 18:41:46,623 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2461 Int) (v_ArrVal_2462 (Array Int Int))) (= (store (store |c_#valid| |c_ULTIMATE.start_main_~s~0#1.base| 0) (let ((.cse1 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) |c_ULTIMATE.start_sll_update_at_~head#1.offset| v_ArrVal_2461)))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~s~0#1.base|) .cse1) v_ArrVal_2462)) |c_ULTIMATE.start_main_~s~0#1.base|) .cse1)) 0) |c_ULTIMATE.start_main_old_#valid#1|)) is different from false [2021-11-25 18:41:46,642 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2461 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_141| Int) (v_ArrVal_2462 (Array Int Int))) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_141|) (= (store (store |c_#valid| |c_ULTIMATE.start_main_~s~0#1.base| 0) (let ((.cse1 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (select (select (let ((.cse0 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_141| v_ArrVal_2461))) (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base| .cse0) (select .cse0 .cse1) v_ArrVal_2462)) |c_ULTIMATE.start_main_~s~0#1.base|) .cse1)) 0) |c_ULTIMATE.start_main_old_#valid#1|))) is different from false [2021-11-25 18:41:46,656 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2461 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_141| Int) (v_ArrVal_2462 (Array Int Int))) (or (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_141|) (= (store (store |c_#valid| |c_ULTIMATE.start_sll_create_~head~0#1.base| 0) (let ((.cse1 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4))) (select (select (let ((.cse0 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_141| v_ArrVal_2461))) (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse0) (select .cse0 .cse1) v_ArrVal_2462)) |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse1)) 0) |c_ULTIMATE.start_main_old_#valid#1|))) is different from false [2021-11-25 18:41:46,670 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:41:46,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 18:41:46,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:46,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:41:46,679 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:41:46,679 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 2 case distinctions, treesize of input 37 treesize of output 41 [2021-11-25 18:41:46,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 44 [2021-11-25 18:41:46,685 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 21 treesize of output 17 [2021-11-25 18:42:05,185 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 9 not checked. [2021-11-25 18:42:05,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767935916] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:42:05,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [905180303] [2021-11-25 18:42:05,188 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2021-11-25 18:42:05,188 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:42:05,188 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:42:05,189 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:42:05,189 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:42:05,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:05,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:05,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:42:05,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:05,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:42:05,257 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 18:42:05,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:42:05,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:05,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:05,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 18:42:05,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:05,309 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 25 treesize of output 13 [2021-11-25 18:42:05,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:05,319 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 25 treesize of output 13 [2021-11-25 18:42:05,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:05,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:05,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:05,371 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 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-25 18:42:05,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:42:05,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:42:05,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:42:05,395 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 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:42:05,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:05,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:05,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:05,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:05,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:05,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:42:05,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:05,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:05,532 INFO L354 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2021-11-25 18:42:05,532 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 3 case distinctions, treesize of input 297 treesize of output 289 [2021-11-25 18:42:05,576 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:42:05,577 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 287 treesize of output 294 [2021-11-25 18:42:05,616 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:42:05,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 281 treesize of output 288 [2021-11-25 18:42:05,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:42:05,860 INFO L354 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2021-11-25 18:42:05,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 315 treesize of output 320 [2021-11-25 18:42:05,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:05,914 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:42:05,914 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 324 treesize of output 325 [2021-11-25 18:42:05,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:05,963 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:42:05,963 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 318 treesize of output 319 [2021-11-25 18:42:06,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:42:06,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:42:06,390 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 18:42:06,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 414 treesize of output 407 [2021-11-25 18:42:06,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:06,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:06,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:06,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:42:06,415 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 18:42:06,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 436 treesize of output 413 [2021-11-25 18:42:06,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:42:06,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:42:06,463 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 18:42:06,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 432 treesize of output 425 [2021-11-25 18:42:06,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:06,632 INFO L354 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2021-11-25 18:42:06,632 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 8 case distinctions, treesize of input 370 treesize of output 373 [2021-11-25 18:42:06,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:06,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:06,884 INFO L354 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2021-11-25 18:42:06,884 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 3 case distinctions, treesize of input 297 treesize of output 289 [2021-11-25 18:42:06,939 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:42:06,940 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 287 treesize of output 294 [2021-11-25 18:42:06,975 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:42:06,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 281 treesize of output 288 [2021-11-25 18:42:07,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:42:07,152 INFO L354 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2021-11-25 18:42:07,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 315 treesize of output 320 [2021-11-25 18:42:07,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:07,197 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:42:07,198 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 324 treesize of output 325 [2021-11-25 18:42:07,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:07,236 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:42:07,236 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 318 treesize of output 319 [2021-11-25 18:42:07,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:07,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:07,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:07,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:07,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:42:07,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:42:07,616 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 18:42:07,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 447 treesize of output 424 [2021-11-25 18:42:07,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:42:07,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:42:07,646 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-25 18:42:07,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 443 treesize of output 436 [2021-11-25 18:42:07,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:42:07,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:42:07,677 INFO L354 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2021-11-25 18:42:07,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 503 treesize of output 496 [2021-11-25 18:42:07,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:42:07,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:42:07,847 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 15 treesize of output 1 [2021-11-25 18:42:08,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:42:08,036 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-25 18:42:08,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 148 treesize of output 146 [2021-11-25 18:42:08,062 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-25 18:42:08,062 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 142 treesize of output 140 [2021-11-25 18:42:08,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:42:08,647 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 0 case distinctions, treesize of input 16 treesize of output 13 [2021-11-25 18:42:08,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 13 [2021-11-25 18:42:08,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:42:08,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:42:08,902 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:42:14,879 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8387#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 2 |ULTIMATE.start_main_~len~0#1|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_destroy_#in~head#1.offset| 0) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~len~0#1| 2) (or (and (exists ((|v_ULTIMATE.start_sll_destroy_~head#1.base_47| Int)) (and (< |v_ULTIMATE.start_sll_destroy_~head#1.base_47| |#StackHeapBarrier|) (= (select |#valid| |v_ULTIMATE.start_sll_destroy_~head#1.base_47|) 0))) (= |ULTIMATE.start_sll_destroy_~temp~1#1.offset| |ULTIMATE.start_sll_destroy_~head#1.offset|) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_sll_destroy_~temp~1#1.base| |ULTIMATE.start_sll_destroy_~head#1.base|) (= |#NULL.base| 0)) (and (= |ULTIMATE.start_sll_destroy_~head#1.base| |ULTIMATE.start_sll_destroy_#in~head#1.base|) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_sll_destroy_#in~head#1.base| |ULTIMATE.start_main_~s~0#1.base|) (= |#NULL.base| 0))) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= 0 |ULTIMATE.start_sll_destroy_#in~head#1.offset|) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_sll_destroy_~head#1.base| 0) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |ULTIMATE.start_sll_destroy_~head#1.offset| 0) (= |ULTIMATE.start_main_#res#1| 0))' at error location [2021-11-25 18:42:14,879 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:42:14,879 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:42:14,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 15, 17] total 51 [2021-11-25 18:42:14,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531478100] [2021-11-25 18:42:14,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:42:14,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-25 18:42:14,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:42:14,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-25 18:42:14,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=4065, Unknown=12, NotChecked=798, Total=5112 [2021-11-25 18:42:14,881 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 53 states, 52 states have (on average 2.230769230769231) internal successors, (116), 52 states have internal predecessors, (116), 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 18:42:15,417 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|))) (let ((.cse2 (select .cse1 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4)))) (and (let ((.cse0 (select .cse1 4))) (or (= (store (store |c_#valid| |c_ULTIMATE.start_sll_create_~head~0#1.base| 0) .cse0 0) |c_ULTIMATE.start_main_old_#valid#1|) (= .cse0 |c_ULTIMATE.start_sll_create_~head~0#1.base|))) (= (select |c_ULTIMATE.start_main_old_#valid#1| .cse2) 0) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4) |c_ULTIMATE.start_sll_create_~head~0#1.offset|) (= |c_ULTIMATE.start_sll_create_~head~0#1.offset| 0) (= (select (store |c_ULTIMATE.start_main_old_#valid#1| .cse2 1) |c_ULTIMATE.start_sll_create_~head~0#1.base|) 0) (forall ((v_ArrVal_2461 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_141| Int) (v_ArrVal_2462 (Array Int Int))) (or (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_141|) (= (store (store |c_#valid| |c_ULTIMATE.start_sll_create_~head~0#1.base| 0) (let ((.cse4 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4))) (select (select (let ((.cse3 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_141| v_ArrVal_2461))) (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse3) (select .cse3 .cse4) v_ArrVal_2462)) |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse4)) 0) |c_ULTIMATE.start_main_old_#valid#1|))) (exists ((v_ArrVal_2457 Int)) (= (store (store |c_ULTIMATE.start_main_old_#valid#1| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4)) 1) |c_ULTIMATE.start_sll_create_~head~0#1.base| v_ArrVal_2457) |c_#valid|))))) is different from false [2021-11-25 18:42:15,422 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse3 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|))) (let ((.cse4 (select .cse3 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)))) (and (forall ((v_ArrVal_2461 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_141| Int) (v_ArrVal_2462 (Array Int Int))) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_141|) (= (store (store |c_#valid| |c_ULTIMATE.start_main_~s~0#1.base| 0) (let ((.cse1 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (select (select (let ((.cse0 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_141| v_ArrVal_2461))) (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base| .cse0) (select .cse0 .cse1) v_ArrVal_2462)) |c_ULTIMATE.start_main_~s~0#1.base|) .cse1)) 0) |c_ULTIMATE.start_main_old_#valid#1|))) (= |c_ULTIMATE.start_main_~i~0#1| 0) (let ((.cse2 (select .cse3 4))) (or (= (store (store |c_#valid| |c_ULTIMATE.start_main_~s~0#1.base| 0) .cse2 0) |c_ULTIMATE.start_main_old_#valid#1|) (= |c_ULTIMATE.start_main_~s~0#1.base| .cse2))) (= (select |c_ULTIMATE.start_main_old_#valid#1| .cse4) 0) (= (select (store |c_ULTIMATE.start_main_old_#valid#1| .cse4 1) |c_ULTIMATE.start_main_~s~0#1.base|) 0) (= |c_ULTIMATE.start_main_~s~0#1.offset| (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) 4)) (exists ((v_ArrVal_2457 Int)) (= (store (store |c_ULTIMATE.start_main_old_#valid#1| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) 1) |c_ULTIMATE.start_main_~s~0#1.base| v_ArrVal_2457) |c_#valid|)) (= |c_ULTIMATE.start_main_~s~0#1.offset| 0)))) is different from false [2021-11-25 18:42:16,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:42:16,716 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2021-11-25 18:42:16,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-25 18:42:16,716 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 2.230769230769231) internal successors, (116), 52 states have internal predecessors, (116), 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 44 [2021-11-25 18:42:16,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:42:16,717 INFO L225 Difference]: With dead ends: 89 [2021-11-25 18:42:16,717 INFO L226 Difference]: Without dead ends: 88 [2021-11-25 18:42:16,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 1415 ImplicationChecksByTransitivity, 27.0s TimeCoverageRelationStatistics Valid=426, Invalid=6732, Unknown=14, NotChecked=1384, Total=8556 [2021-11-25 18:42:16,718 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 9 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 201 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:42:16,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 211 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 187 Invalid, 0 Unknown, 201 Unchecked, 0.2s Time] [2021-11-25 18:42:16,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-25 18:42:16,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-11-25 18:42:16,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.0843373493975903) internal successors, (90), 87 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:42:16,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2021-11-25 18:42:16,721 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 44 [2021-11-25 18:42:16,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:42:16,721 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2021-11-25 18:42:16,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 2.230769230769231) internal successors, (116), 52 states have internal predecessors, (116), 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 18:42:16,721 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2021-11-25 18:42:16,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-25 18:42:16,722 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:42:16,722 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:42:16,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-25 18:42:16,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:42:16,930 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:42:16,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:42:16,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1621218678, now seen corresponding path program 2 times [2021-11-25 18:42:16,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:42:16,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506812498] [2021-11-25 18:42:16,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:42:16,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:42:16,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:42:17,918 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:42:17,918 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:42:17,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506812498] [2021-11-25 18:42:17,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506812498] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:42:17,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357630227] [2021-11-25 18:42:17,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:42:17,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:42:17,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:42:17,920 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:42:17,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-25 18:42:18,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 18:42:18,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:42:18,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 126 conjunts are in the unsatisfiable core [2021-11-25 18:42:18,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:42:18,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:42:18,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:42:18,190 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 13 treesize of output 9 [2021-11-25 18:42:18,248 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 18 [2021-11-25 18:42:18,252 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 18 [2021-11-25 18:42:18,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:42:18,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-25 18:42:18,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:42:18,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-25 18:42:18,334 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:42:18,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-25 18:42:18,395 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 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 18:42:18,400 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 14 treesize of output 16 [2021-11-25 18:42:18,414 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 14 treesize of output 16 [2021-11-25 18:42:18,419 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 14 treesize of output 16 [2021-11-25 18:42:18,460 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 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 18:42:18,463 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 27 treesize of output 26 [2021-11-25 18:42:18,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:18,668 INFO L354 Elim1Store]: treesize reduction 39, result has 15.2 percent of original size [2021-11-25 18:42:18,668 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 41 [2021-11-25 18:42:18,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:42:18,674 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 34 treesize of output 36 [2021-11-25 18:42:18,923 INFO L354 Elim1Store]: treesize reduction 57, result has 13.6 percent of original size [2021-11-25 18:42:18,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 95 treesize of output 64 [2021-11-25 18:42:18,936 INFO L354 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2021-11-25 18:42:18,936 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 45 [2021-11-25 18:42:19,399 INFO L354 Elim1Store]: treesize reduction 33, result has 19.5 percent of original size [2021-11-25 18:42:19,400 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 38 [2021-11-25 18:42:19,406 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:42:19,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-11-25 18:42:19,449 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 18:42:19,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:43:24,696 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_150| Int)) (or (and (forall ((v_ArrVal_2594 Int) (v_ArrVal_2596 Int) (v_ArrVal_2600 Int)) (= (select (let ((.cse1 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (let ((.cse0 (let ((.cse4 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_150| v_ArrVal_2594))) (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base| .cse4)) (.cse3 (select .cse4 .cse1))) (store .cse2 .cse3 (store (select .cse2 .cse3) (select (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_150| v_ArrVal_2596) .cse1) v_ArrVal_2600)))))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~s~0#1.base|) .cse1)))) 4) 0)) (forall ((v_ArrVal_2594 Int) (v_ArrVal_2596 Int) (v_ArrVal_2599 Int) (v_ArrVal_2600 Int)) (= (select (let ((.cse8 (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_150| v_ArrVal_2596)) (.cse10 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_150| v_ArrVal_2594)) (.cse11 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (let ((.cse6 (select .cse10 .cse11)) (.cse7 (select .cse8 .cse11))) (select (let ((.cse5 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base| .cse8))) (store .cse5 .cse6 (store (select .cse5 .cse6) .cse7 v_ArrVal_2599))) (select (select (let ((.cse9 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base| .cse10))) (store .cse9 .cse6 (store (select .cse9 .cse6) .cse7 v_ArrVal_2600))) |c_ULTIMATE.start_main_~s~0#1.base|) .cse11)))) 4) 0))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_150|))) is different from false [2021-11-25 18:43:26,741 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_150| Int)) (or (and (forall ((v_ArrVal_2594 Int) (v_ArrVal_2596 Int) (v_ArrVal_2599 Int) (v_ArrVal_2600 Int)) (= (select (let ((.cse3 (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_150| v_ArrVal_2596)) (.cse5 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_150| v_ArrVal_2594)) (.cse6 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4))) (let ((.cse1 (select .cse5 .cse6)) (.cse2 (select .cse3 .cse6))) (select (let ((.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse3))) (store .cse0 .cse1 (store (select .cse0 .cse1) .cse2 v_ArrVal_2599))) (select (select (let ((.cse4 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse5))) (store .cse4 .cse1 (store (select .cse4 .cse1) .cse2 v_ArrVal_2600))) |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse6)))) 4) 0)) (forall ((v_ArrVal_2594 Int) (v_ArrVal_2596 Int) (v_ArrVal_2600 Int)) (= 0 (select (let ((.cse8 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4))) (let ((.cse7 (let ((.cse11 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_150| v_ArrVal_2594))) (let ((.cse9 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse11)) (.cse10 (select .cse11 .cse8))) (store .cse9 .cse10 (store (select .cse9 .cse10) (select (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_150| v_ArrVal_2596) .cse8) v_ArrVal_2600)))))) (select .cse7 (select (select .cse7 |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse8)))) 4)))) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_150|))) is different from false [2021-11-25 18:43:28,780 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_sll_create_~new_head~0#1.offset| Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_150| Int)) (or (and (forall ((v_ArrVal_2594 Int) (v_ArrVal_2596 Int) (v_ArrVal_2600 Int)) (= (select (let ((.cse1 (+ 4 |ULTIMATE.start_sll_create_~new_head~0#1.offset|))) (let ((.cse0 (let ((.cse4 (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) .cse1 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_150| v_ArrVal_2594))) (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| .cse4)) (.cse3 (select .cse4 .cse1))) (store .cse2 .cse3 (store (select .cse2 .cse3) (select (store (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) .cse1 |c_ULTIMATE.start_sll_create_~head~0#1.offset|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_150| v_ArrVal_2596) .cse1) v_ArrVal_2600)))))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) .cse1)))) 4) 0)) (forall ((v_ArrVal_2594 Int) (v_ArrVal_2596 Int) (v_ArrVal_2599 Int) (v_ArrVal_2600 Int)) (= (select (let ((.cse11 (+ 4 |ULTIMATE.start_sll_create_~new_head~0#1.offset|))) (let ((.cse8 (store (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) .cse11 |c_ULTIMATE.start_sll_create_~head~0#1.offset|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_150| v_ArrVal_2596)) (.cse10 (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) .cse11 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_150| v_ArrVal_2594))) (let ((.cse6 (select .cse10 .cse11)) (.cse7 (select .cse8 .cse11))) (select (let ((.cse5 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| .cse8))) (store .cse5 .cse6 (store (select .cse5 .cse6) .cse7 v_ArrVal_2599))) (select (select (let ((.cse9 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| .cse10))) (store .cse9 .cse6 (store (select .cse9 .cse6) .cse7 v_ArrVal_2600))) |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) .cse11))))) 4) 0))) (< |ULTIMATE.start_sll_create_~new_head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_150|))) is different from false [2021-11-25 18:43:28,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:43:28,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:43:28,812 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:43:28,813 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 243 treesize of output 242 [2021-11-25 18:43:28,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:43:28,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:43:28,836 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:43:28,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 146 treesize of output 126 [2021-11-25 18:43:28,863 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 8 treesize of output 4 [2021-11-25 18:43:28,883 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 8 treesize of output 4 [2021-11-25 18:43:28,907 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 8 treesize of output 4 [2021-11-25 18:43:28,943 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 8 treesize of output 4 [2021-11-25 18:43:28,962 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 8 treesize of output 4 [2021-11-25 18:43:28,985 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 8 treesize of output 4 [2021-11-25 18:43:29,012 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 8 treesize of output 4 [2021-11-25 18:43:29,016 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 8 treesize of output 4 [2021-11-25 18:43:29,030 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 8 treesize of output 4 [2021-11-25 18:43:29,239 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 8 treesize of output 4 [2021-11-25 18:43:29,266 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 8 treesize of output 4 [2021-11-25 18:43:29,298 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 8 treesize of output 4 [2021-11-25 18:43:29,334 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 8 treesize of output 4 [2021-11-25 18:43:29,339 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 8 treesize of output 4 [2021-11-25 18:43:29,353 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 8 treesize of output 4 [2021-11-25 18:43:29,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-11-25 18:43:29,477 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 8 treesize of output 4 [2021-11-25 18:43:29,523 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 8 treesize of output 4 [2021-11-25 18:43:29,548 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 8 treesize of output 4 [2021-11-25 18:43:29,552 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 8 treesize of output 4 [2021-11-25 18:43:29,565 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 8 treesize of output 4 [2021-11-25 18:43:29,633 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 8 treesize of output 4 [2021-11-25 18:43:29,683 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 8 treesize of output 4 [2021-11-25 18:43:29,717 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 8 treesize of output 4 [2021-11-25 18:43:29,773 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 8 treesize of output 4 [2021-11-25 18:43:29,829 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 8 treesize of output 4 [2021-11-25 18:43:29,866 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 8 treesize of output 4 [2021-11-25 18:43:29,888 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 8 treesize of output 4 [2021-11-25 18:43:29,939 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 8 treesize of output 4 [2021-11-25 18:43:29,945 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 8 treesize of output 4 [2021-11-25 18:43:29,981 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 8 treesize of output 4 [2021-11-25 18:43:30,098 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 8 treesize of output 4 [2021-11-25 18:43:30,104 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 8 treesize of output 4 [2021-11-25 18:43:30,343 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 12 treesize of output 8 [2021-11-25 18:43:30,418 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 102 [2021-11-25 18:43:30,453 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 12 treesize of output 8 [2021-11-25 18:43:30,491 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 126 treesize of output 102 [2021-11-25 18:43:30,514 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 12 treesize of output 8 [2021-11-25 18:43:30,545 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 12 treesize of output 8 [2021-11-25 18:43:30,583 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 102 [2021-11-25 18:43:30,616 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 12 treesize of output 8 [2021-11-25 18:43:30,654 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 126 treesize of output 102 [2021-11-25 18:43:30,677 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 12 treesize of output 8 [2021-11-25 18:43:30,708 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 102 [2021-11-25 18:43:30,714 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 12 treesize of output 8 [2021-11-25 18:43:30,731 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 126 treesize of output 102 [2021-11-25 18:43:30,808 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 126 treesize of output 102 [2021-11-25 18:43:30,945 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 102 [2021-11-25 18:43:30,951 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 12 treesize of output 8 [2021-11-25 18:43:31,232 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 12 treesize of output 8 [2021-11-25 18:43:31,301 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 226 treesize of output 198 [2021-11-25 18:43:31,335 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 12 treesize of output 8 [2021-11-25 18:43:31,361 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 12 treesize of output 8 [2021-11-25 18:43:31,378 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 238 treesize of output 182 [2021-11-25 18:43:31,422 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 12 treesize of output 8 [2021-11-25 18:43:31,460 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 226 treesize of output 198 [2021-11-25 18:43:31,495 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 12 treesize of output 8 [2021-11-25 18:43:31,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-11-25 18:43:31,537 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 238 treesize of output 182 [2021-11-25 18:43:31,574 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 226 treesize of output 198 [2021-11-25 18:43:31,580 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 12 treesize of output 8 [2021-11-25 18:43:31,598 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 238 treesize of output 182 [2021-11-25 18:43:31,699 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 12 treesize of output 8 [2021-11-25 18:43:31,794 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 226 treesize of output 198 [2021-11-25 18:43:31,837 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 12 treesize of output 8 [2021-11-25 18:43:31,871 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 12 treesize of output 8 [2021-11-25 18:43:31,893 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 238 treesize of output 182 [2021-11-25 18:43:31,951 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 12 treesize of output 8 [2021-11-25 18:43:31,995 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 226 treesize of output 198 [2021-11-25 18:43:32,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-11-25 18:43:32,073 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 12 treesize of output 8 [2021-11-25 18:43:32,098 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 238 treesize of output 182 [2021-11-25 18:43:32,145 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 226 treesize of output 198 [2021-11-25 18:43:32,154 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 12 treesize of output 8 [2021-11-25 18:43:32,177 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 238 treesize of output 182 [2021-11-25 18:43:32,269 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 226 treesize of output 198 [2021-11-25 18:43:32,275 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 12 treesize of output 8 [2021-11-25 18:43:32,325 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 238 treesize of output 182 [2021-11-25 18:43:32,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:43:32,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:43:32,703 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:43:32,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 515 treesize of output 280 [2021-11-25 18:43:32,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:43:32,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:43:32,718 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:43:32,718 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 280 treesize of output 210 [2021-11-25 18:43:32,740 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 367 treesize of output 353 [2021-11-25 18:43:32,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:43:32,795 INFO L354 Elim1Store]: treesize reduction 23, result has 70.1 percent of original size [2021-11-25 18:43:32,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 983 treesize of output 940 [2021-11-25 18:43:32,821 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:43:32,821 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 1032 treesize of output 818 [2021-11-25 18:43:32,837 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 1069 treesize of output 1009 [2021-11-25 18:43:32,893 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-11-25 18:43:32,893 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 1233 treesize of output 1189 [2021-11-25 18:43:32,987 INFO L354 Elim1Store]: treesize reduction 12, result has 74.5 percent of original size [2021-11-25 18:43:32,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 1629 treesize of output 1582 [2021-11-25 18:43:33,074 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:43:33,075 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 1611 treesize of output 1293 [2021-11-25 18:46:05,185 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 171 treesize of output 167 [2021-11-25 18:46:06,460 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:46:06,461 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 62 treesize of output 64 [2021-11-25 18:46:06,546 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:46:06,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 42 [2021-11-25 18:46:06,757 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 10 treesize of output 8 [2021-11-25 18:46:06,762 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 5 not checked. [2021-11-25 18:46:06,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357630227] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:46:06,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [351071199] [2021-11-25 18:46:06,764 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2021-11-25 18:46:06,764 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:46:06,764 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:46:06,764 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:46:06,765 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:46:06,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:06,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:06,815 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 18:46:06,847 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 13 treesize of output 9 [2021-11-25 18:46:06,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:06,857 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 18:46:06,867 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 18:46:06,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:06,895 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 25 treesize of output 13 [2021-11-25 18:46:06,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:06,907 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 25 treesize of output 13 [2021-11-25 18:46:06,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:06,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:06,919 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 26 treesize of output 28 [2021-11-25 18:46:06,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:06,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:46:06,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:06,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:46:06,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:06,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:06,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:06,990 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 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-25 18:46:07,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:07,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:07,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:07,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:07,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:07,028 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 18:46:07,128 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:46:07,129 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 284 treesize of output 291 [2021-11-25 18:46:07,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:07,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:07,151 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:46:07,151 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 2 case distinctions, treesize of input 284 treesize of output 266 [2021-11-25 18:46:07,193 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:46:07,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 278 treesize of output 285 [2021-11-25 18:46:07,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:07,352 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:46:07,352 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 311 treesize of output 312 [2021-11-25 18:46:07,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:07,402 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:46:07,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 292 treesize of output 293 [2021-11-25 18:46:07,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:07,451 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:46:07,452 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 301 treesize of output 302 [2021-11-25 18:46:07,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:07,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:07,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:07,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:07,795 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 18:46:07,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 305 treesize of output 290 [2021-11-25 18:46:07,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:07,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:07,827 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 18:46:07,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 301 treesize of output 294 [2021-11-25 18:46:07,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:07,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:07,859 INFO L354 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2021-11-25 18:46:07,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 379 treesize of output 372 [2021-11-25 18:46:07,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:07,997 INFO L354 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2021-11-25 18:46:07,998 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 8 case distinctions, treesize of input 380 treesize of output 383 [2021-11-25 18:46:08,223 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:46:08,224 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 284 treesize of output 291 [2021-11-25 18:46:08,266 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:46:08,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 278 treesize of output 285 [2021-11-25 18:46:08,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:08,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:08,287 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:46:08,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 278 treesize of output 260 [2021-11-25 18:46:08,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:08,463 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:46:08,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 311 treesize of output 312 [2021-11-25 18:46:08,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:08,511 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:46:08,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 305 treesize of output 306 [2021-11-25 18:46:08,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:08,560 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:46:08,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 286 treesize of output 287 [2021-11-25 18:46:08,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:08,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:08,910 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-25 18:46:08,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 313 treesize of output 306 [2021-11-25 18:46:08,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:08,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:08,945 INFO L354 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2021-11-25 18:46:08,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 349 treesize of output 342 [2021-11-25 18:46:08,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:08,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:08,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:08,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:08,969 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-25 18:46:08,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 431 treesize of output 416 [2021-11-25 18:46:09,123 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 15 treesize of output 1 [2021-11-25 18:46:09,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 18:46:09,143 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:46:09,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:46:09,268 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 18:46:09,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:46:09,797 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 18:46:09,875 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 0 case distinctions, treesize of input 16 treesize of output 13 [2021-11-25 18:46:09,953 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 0 case distinctions, treesize of input 16 treesize of output 13 [2021-11-25 18:46:10,122 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 18:46:10,129 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 18:46:10,133 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:46:15,361 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8944#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_destroy_#in~head#1.offset| 0) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 2 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (not (= (select |#valid| |ULTIMATE.start_sll_destroy_~head#1.base|) 1)) (<= 0 |ULTIMATE.start_sll_destroy_#in~head#1.offset|) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2021-11-25 18:46:15,361 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:46:15,361 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:46:15,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 19, 21] total 55 [2021-11-25 18:46:15,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139434809] [2021-11-25 18:46:15,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:46:15,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-25 18:46:15,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:46:15,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-25 18:46:15,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=4665, Unknown=26, NotChecked=420, Total=5402 [2021-11-25 18:46:15,364 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand has 56 states, 56 states have (on average 2.0) internal successors, (112), 55 states have internal predecessors, (112), 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 18:46:17,595 WARN L838 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_node_create_~temp~0#1.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|)) (forall ((|ULTIMATE.start_sll_create_~new_head~0#1.offset| Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_150| Int)) (or (and (forall ((v_ArrVal_2594 Int) (v_ArrVal_2596 Int) (v_ArrVal_2600 Int)) (= (select (let ((.cse1 (+ 4 |ULTIMATE.start_sll_create_~new_head~0#1.offset|))) (let ((.cse0 (let ((.cse4 (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) .cse1 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_150| v_ArrVal_2594))) (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| .cse4)) (.cse3 (select .cse4 .cse1))) (store .cse2 .cse3 (store (select .cse2 .cse3) (select (store (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) .cse1 |c_ULTIMATE.start_sll_create_~head~0#1.offset|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_150| v_ArrVal_2596) .cse1) v_ArrVal_2600)))))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) .cse1)))) 4) 0)) (forall ((v_ArrVal_2594 Int) (v_ArrVal_2596 Int) (v_ArrVal_2599 Int) (v_ArrVal_2600 Int)) (= (select (let ((.cse11 (+ 4 |ULTIMATE.start_sll_create_~new_head~0#1.offset|))) (let ((.cse8 (store (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) .cse11 |c_ULTIMATE.start_sll_create_~head~0#1.offset|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_150| v_ArrVal_2596)) (.cse10 (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) .cse11 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_150| v_ArrVal_2594))) (let ((.cse6 (select .cse10 .cse11)) (.cse7 (select .cse8 .cse11))) (select (let ((.cse5 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| .cse8))) (store .cse5 .cse6 (store (select .cse5 .cse6) .cse7 v_ArrVal_2599))) (select (select (let ((.cse9 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| .cse10))) (store .cse9 .cse6 (store (select .cse9 .cse6) .cse7 v_ArrVal_2600))) |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) .cse11))))) 4) 0))) (< |ULTIMATE.start_sll_create_~new_head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_150|))) (= |c_ULTIMATE.start_node_create_~temp~0#1.offset| |c_ULTIMATE.start_sll_create_~head~0#1.offset|) (= |c_ULTIMATE.start_node_create_~temp~0#1.offset| 0) (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4) 0) (not (= |c_ULTIMATE.start_sll_create_~head~0#1.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|)) (= |c_ULTIMATE.start_sll_create_~head~0#1.offset| |c_ULTIMATE.start_sll_create_~new_head~0#1.offset|) (= |c_ULTIMATE.start_sll_create_~new_head~0#1.offset| 0) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4) 0)) is different from false [2021-11-25 18:46:19,600 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse12 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4))) (and (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_150| Int)) (or (and (forall ((v_ArrVal_2594 Int) (v_ArrVal_2596 Int) (v_ArrVal_2599 Int) (v_ArrVal_2600 Int)) (= (select (let ((.cse3 (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_150| v_ArrVal_2596)) (.cse5 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_150| v_ArrVal_2594)) (.cse6 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4))) (let ((.cse1 (select .cse5 .cse6)) (.cse2 (select .cse3 .cse6))) (select (let ((.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse3))) (store .cse0 .cse1 (store (select .cse0 .cse1) .cse2 v_ArrVal_2599))) (select (select (let ((.cse4 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse5))) (store .cse4 .cse1 (store (select .cse4 .cse1) .cse2 v_ArrVal_2600))) |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse6)))) 4) 0)) (forall ((v_ArrVal_2594 Int) (v_ArrVal_2596 Int) (v_ArrVal_2600 Int)) (= 0 (select (let ((.cse8 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4))) (let ((.cse7 (let ((.cse11 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_150| v_ArrVal_2594))) (let ((.cse9 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse11)) (.cse10 (select .cse11 .cse8))) (store .cse9 .cse10 (store (select .cse9 .cse10) (select (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_150| v_ArrVal_2596) .cse8) v_ArrVal_2600)))))) (select .cse7 (select (select .cse7 |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse8)))) 4)))) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_150|))) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4) |c_ULTIMATE.start_sll_create_~head~0#1.offset|) (= |c_ULTIMATE.start_sll_create_~head~0#1.offset| 0) (= (select (select |c_#memory_$Pointer$.base| .cse12) 4) 0) (= (select (select |c_#memory_$Pointer$.offset| .cse12) 4) 0) (not (= .cse12 |c_ULTIMATE.start_sll_create_~head~0#1.base|)))) is different from false [2021-11-25 18:46:21,605 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) 4))) (and (= |c_ULTIMATE.start_main_~i~0#1| 0) (not (= |c_ULTIMATE.start_main_~s~0#1.base| .cse0)) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_150| Int)) (or (and (forall ((v_ArrVal_2594 Int) (v_ArrVal_2596 Int) (v_ArrVal_2600 Int)) (= (select (let ((.cse2 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (let ((.cse1 (let ((.cse5 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_150| v_ArrVal_2594))) (let ((.cse3 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base| .cse5)) (.cse4 (select .cse5 .cse2))) (store .cse3 .cse4 (store (select .cse3 .cse4) (select (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_150| v_ArrVal_2596) .cse2) v_ArrVal_2600)))))) (select .cse1 (select (select .cse1 |c_ULTIMATE.start_main_~s~0#1.base|) .cse2)))) 4) 0)) (forall ((v_ArrVal_2594 Int) (v_ArrVal_2596 Int) (v_ArrVal_2599 Int) (v_ArrVal_2600 Int)) (= (select (let ((.cse9 (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_150| v_ArrVal_2596)) (.cse11 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_150| v_ArrVal_2594)) (.cse12 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (let ((.cse7 (select .cse11 .cse12)) (.cse8 (select .cse9 .cse12))) (select (let ((.cse6 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base| .cse9))) (store .cse6 .cse7 (store (select .cse6 .cse7) .cse8 v_ArrVal_2599))) (select (select (let ((.cse10 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base| .cse11))) (store .cse10 .cse7 (store (select .cse10 .cse7) .cse8 v_ArrVal_2600))) |c_ULTIMATE.start_main_~s~0#1.base|) .cse12)))) 4) 0))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_150|))) (= (select (select |c_#memory_$Pointer$.offset| .cse0) 4) 0) (= (select (select |c_#memory_$Pointer$.base| .cse0) 4) 0) (= |c_ULTIMATE.start_main_~s~0#1.offset| (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) 4)) (= |c_ULTIMATE.start_main_~s~0#1.offset| 0))) is different from false [2021-11-25 18:46:23,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:46:23,210 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2021-11-25 18:46:23,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-25 18:46:23,210 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0) internal successors, (112), 55 states have internal predecessors, (112), 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 44 [2021-11-25 18:46:23,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:46:23,211 INFO L225 Difference]: With dead ends: 88 [2021-11-25 18:46:23,211 INFO L226 Difference]: Without dead ends: 57 [2021-11-25 18:46:23,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 86 SyntacticMatches, 5 SemanticMatches, 88 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 2331 ImplicationChecksByTransitivity, 83.4s TimeCoverageRelationStatistics Valid=473, Invalid=6494, Unknown=29, NotChecked=1014, Total=8010 [2021-11-25 18:46:23,213 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 76 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 1259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 484 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:46:23,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 299 Invalid, 1259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 735 Invalid, 0 Unknown, 484 Unchecked, 0.6s Time] [2021-11-25 18:46:23,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-25 18:46:23,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-11-25 18:46:23,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 56 states have internal predecessors, (58), 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 18:46:23,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2021-11-25 18:46:23,216 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 44 [2021-11-25 18:46:23,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:46:23,217 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2021-11-25 18:46:23,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0) internal successors, (112), 55 states have internal predecessors, (112), 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 18:46:23,217 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2021-11-25 18:46:23,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-25 18:46:23,218 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:46:23,218 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-25 18:46:23,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-25 18:46:23,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:46:23,434 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:46:23,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:46:23,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1373563767, now seen corresponding path program 3 times [2021-11-25 18:46:23,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:46:23,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702711541] [2021-11-25 18:46:23,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:46:23,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:46:23,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:46:23,497 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-25 18:46:23,497 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:46:23,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702711541] [2021-11-25 18:46:23,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702711541] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:46:23,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635507136] [2021-11-25 18:46:23,498 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:46:23,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:46:23,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:46:23,511 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:46:23,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-25 18:46:23,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:46:23,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:46:23,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 105 conjunts are in the unsatisfiable core [2021-11-25 18:46:23,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:46:23,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:46:23,979 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:46:23,980 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 18:46:24,017 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 15 treesize of output 17 [2021-11-25 18:46:24,040 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 15 treesize of output 17 [2021-11-25 18:46:24,073 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 22 treesize of output 21 [2021-11-25 18:46:24,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:46:24,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:24,225 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:46:24,225 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 33 [2021-11-25 18:46:24,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:24,230 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 18 [2021-11-25 18:46:24,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:46:24,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:24,361 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:46:24,361 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 33 [2021-11-25 18:46:24,568 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 18:46:24,643 INFO L354 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2021-11-25 18:46:24,643 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 28 [2021-11-25 18:46:24,734 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 18:46:24,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:46:24,795 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 10 treesize of output 8 [2021-11-25 18:46:38,714 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_157| Int) (v_ArrVal_2761 Int) (v_ArrVal_2763 Int) (v_ArrVal_2759 Int)) (let ((.cse0 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (let ((.cse2 (let ((.cse3 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) |c_ULTIMATE.start_sll_update_at_~head#1.offset| v_ArrVal_2759)))) (let ((.cse4 (select (select .cse3 |c_ULTIMATE.start_main_~s~0#1.base|) .cse0))) (store .cse3 .cse4 (store (select .cse3 .cse4) |v_ULTIMATE.start_sll_update_at_~head#1.offset_157| v_ArrVal_2763)))))) (let ((.cse1 (select (select .cse2 |c_ULTIMATE.start_main_~s~0#1.base|) 4))) (or (< (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base|) |c_ULTIMATE.start_sll_update_at_~head#1.offset| v_ArrVal_2761)) |c_ULTIMATE.start_main_~s~0#1.base|) .cse0) |v_ULTIMATE.start_sll_update_at_~head#1.offset_157|) (= .cse1 |c_ULTIMATE.start_main_~s~0#1.base|) (not (= (select (select .cse2 .cse1) 4) 0))))))) is different from false [2021-11-25 18:46:40,802 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_159| Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_157| Int) (v_ArrVal_2761 Int) (v_ArrVal_2763 Int) (v_ArrVal_2759 Int)) (let ((.cse2 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (let ((.cse0 (let ((.cse5 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_159| v_ArrVal_2759))) (let ((.cse3 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base| .cse5)) (.cse4 (select .cse5 .cse2))) (store .cse3 .cse4 (store (select .cse3 .cse4) |v_ULTIMATE.start_sll_update_at_~head#1.offset_157| v_ArrVal_2763)))))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_main_~s~0#1.base|) 4))) (or (not (= (select (select .cse0 .cse1) 4) 0)) (< (select (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_159| v_ArrVal_2761) .cse2) |v_ULTIMATE.start_sll_update_at_~head#1.offset_157|) (= |c_ULTIMATE.start_main_~s~0#1.base| .cse1) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_159|)))))) is different from false [2021-11-25 18:46:42,895 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_159| Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_157| Int) (v_ArrVal_2761 Int) (v_ArrVal_2763 Int) (v_ArrVal_2759 Int)) (let ((.cse2 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4))) (let ((.cse0 (let ((.cse5 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_159| v_ArrVal_2759))) (let ((.cse3 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse5)) (.cse4 (select .cse5 .cse2))) (store .cse3 .cse4 (store (select .cse3 .cse4) |v_ULTIMATE.start_sll_update_at_~head#1.offset_157| v_ArrVal_2763)))))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4))) (or (not (= (select (select .cse0 .cse1) 4) 0)) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_159|) (< (select (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_159| v_ArrVal_2761) .cse2) |v_ULTIMATE.start_sll_update_at_~head#1.offset_157|) (= |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse1)))))) is different from false [2021-11-25 18:46:42,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-11-25 18:46:42,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:44,981 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_159| Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_157| Int) (v_ArrVal_2763 Int) (v_ArrVal_2759 Int)) (let ((.cse0 (let ((.cse5 (+ 4 |c_ULTIMATE.start_sll_create_~new_head~0#1.offset|))) (let ((.cse4 (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) .cse5 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_159| v_ArrVal_2759))) (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| .cse4)) (.cse3 (select .cse4 .cse5))) (store .cse2 .cse3 (store (select .cse2 .cse3) |v_ULTIMATE.start_sll_update_at_~head#1.offset_157| v_ArrVal_2763))))))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) 4))) (or (< |c_ULTIMATE.start_sll_create_~new_head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_159|) (not (= (select (select .cse0 .cse1) 4) 0)) (= .cse1 |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_157|))))) is different from false [2021-11-25 18:46:44,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:44,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:45,002 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:46:45,002 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 76 [2021-11-25 18:46:45,325 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_157| Int) (v_arrayElimArr_18 (Array Int Int)) (v_ArrVal_2763 Int) (|v_ULTIMATE.start_node_create_~temp~0#1.base_83| Int)) (let ((.cse0 (let ((.cse2 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_node_create_~temp~0#1.base_83| v_arrayElimArr_18))) (store .cse2 |c_ULTIMATE.start_sll_create_~head~0#1.base| (store (select .cse2 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_157| v_ArrVal_2763))))) (let ((.cse1 (select (select .cse0 |v_ULTIMATE.start_node_create_~temp~0#1.base_83|) 4))) (or (not (= (select (select .cse0 .cse1) 4) 0)) (= |v_ULTIMATE.start_node_create_~temp~0#1.base_83| .cse1) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_157|) (not (= (select |c_#valid| |v_ULTIMATE.start_node_create_~temp~0#1.base_83|) 0)) (not (= (select v_arrayElimArr_18 4) |c_ULTIMATE.start_sll_create_~head~0#1.base|)))))) is different from false [2021-11-25 18:46:45,346 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:46:45,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 72 [2021-11-25 18:46:45,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:45,351 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 96 treesize of output 86 [2021-11-25 18:46:45,362 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:46:45,362 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 103 treesize of output 103 [2021-11-25 18:46:45,368 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 100 treesize of output 82 [2021-11-25 18:46:45,374 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 9 [2021-11-25 18:46:45,443 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 8 trivial. 10 not checked. [2021-11-25 18:46:45,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635507136] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:46:45,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [237354261] [2021-11-25 18:46:45,446 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2021-11-25 18:46:45,446 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:46:45,446 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:46:45,447 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:46:45,447 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:46:45,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:45,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:45,478 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 18:46:45,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:45,511 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 18:46:45,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:46:45,527 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 18:46:45,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:45,550 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 25 treesize of output 13 [2021-11-25 18:46:45,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:45,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:45,564 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 26 treesize of output 28 [2021-11-25 18:46:45,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:45,578 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 25 treesize of output 13 [2021-11-25 18:46:45,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:45,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:46:45,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:45,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:45,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:45,622 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 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-25 18:46:45,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:45,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:46:45,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:45,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:45,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:45,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:45,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:45,670 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 18:46:45,765 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:46:45,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 284 treesize of output 291 [2021-11-25 18:46:45,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:45,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:45,819 INFO L354 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2021-11-25 18:46:45,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 284 treesize of output 276 [2021-11-25 18:46:45,862 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:46:45,863 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 274 treesize of output 281 [2021-11-25 18:46:46,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:46,084 INFO L354 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2021-11-25 18:46:46,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 308 treesize of output 313 [2021-11-25 18:46:46,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:46,136 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:46:46,137 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 317 treesize of output 318 [2021-11-25 18:46:46,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:46,188 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:46:46,188 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 311 treesize of output 312 [2021-11-25 18:46:46,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:46,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:46,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:46,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:46,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:46,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:46,621 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 18:46:46,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 440 treesize of output 417 [2021-11-25 18:46:46,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:46,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:46,654 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-25 18:46:46,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 436 treesize of output 429 [2021-11-25 18:46:46,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:46,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:46,688 INFO L354 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2021-11-25 18:46:46,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 490 treesize of output 483 [2021-11-25 18:46:46,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:46,846 INFO L354 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2021-11-25 18:46:46,846 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 8 case distinctions, treesize of input 434 treesize of output 437 [2021-11-25 18:46:47,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:47,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:47,084 INFO L354 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2021-11-25 18:46:47,085 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 3 case distinctions, treesize of input 290 treesize of output 282 [2021-11-25 18:46:47,127 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:46:47,127 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 280 treesize of output 287 [2021-11-25 18:46:47,166 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:46:47,166 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 274 treesize of output 281 [2021-11-25 18:46:47,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:47,387 INFO L354 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2021-11-25 18:46:47,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 308 treesize of output 313 [2021-11-25 18:46:47,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:47,436 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:46:47,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 317 treesize of output 318 [2021-11-25 18:46:47,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:47,484 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:46:47,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 311 treesize of output 312 [2021-11-25 18:46:47,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:47,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:47,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:47,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:46:47,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:47,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:47,957 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 18:46:47,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 440 treesize of output 417 [2021-11-25 18:46:47,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:47,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:48,006 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-25 18:46:48,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 436 treesize of output 429 [2021-11-25 18:46:48,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:48,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:46:48,054 INFO L354 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2021-11-25 18:46:48,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 490 treesize of output 483 [2021-11-25 18:46:48,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 18:46:48,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 18:46:48,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:46:48,547 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-25 18:46:48,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 146 treesize of output 144 [2021-11-25 18:46:48,578 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-25 18:46:48,579 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 140 treesize of output 138 [2021-11-25 18:46:48,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 18:46:49,378 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 18:46:49,528 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 0 case distinctions, treesize of input 16 treesize of output 13 [2021-11-25 18:46:49,624 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 0 case distinctions, treesize of input 16 treesize of output 13 [2021-11-25 18:46:49,797 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 18:46:49,809 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 18:46:49,814 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:46:56,284 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9472#(and (<= |ULTIMATE.start_main_~expected~0#1| 2147483647) (<= |ULTIMATE.start_sll_get_data_at_~index#1| 0) (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_destroy_#in~head#1.offset| 0) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~expected~0#1| 2147483648)) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 0 |ULTIMATE.start_sll_get_data_at_~head#1.offset|) (<= 2 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 0 |ULTIMATE.start_sll_get_data_at_#in~head#1.offset|) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= 0 |ULTIMATE.start_sll_destroy_#in~head#1.offset|) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_sll_destroy_~head#1.base| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= |ULTIMATE.start_sll_get_data_at_#res#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= |ULTIMATE.start_sll_get_data_at_#in~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |ULTIMATE.start_sll_destroy_~head#1.offset| 0) (= |ULTIMATE.start_main_#res#1| 0) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_sll_get_data_at_#res#1| 2147483648)))' at error location [2021-11-25 18:46:56,285 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:46:56,285 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:46:56,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 23, 24] total 40 [2021-11-25 18:46:56,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074858589] [2021-11-25 18:46:56,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:46:56,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-25 18:46:56,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:46:56,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-25 18:46:56,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=2621, Unknown=34, NotChecked=540, Total=3422 [2021-11-25 18:46:56,287 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 40 states, 40 states have (on average 2.775) internal successors, (111), 40 states have internal predecessors, (111), 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 18:46:56,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:46:56,635 INFO L93 Difference]: Finished difference Result 12 states and 11 transitions. [2021-11-25 18:46:56,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 18:46:56,635 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.775) internal successors, (111), 40 states have internal predecessors, (111), 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 49 [2021-11-25 18:46:56,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:46:56,635 INFO L225 Difference]: With dead ends: 12 [2021-11-25 18:46:56,635 INFO L226 Difference]: Without dead ends: 0 [2021-11-25 18:46:56,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 88 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 27.0s TimeCoverageRelationStatistics Valid=275, Invalid=3251, Unknown=34, NotChecked=600, Total=4160 [2021-11-25 18:46:56,636 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 5 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:46:56,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 0 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 205 Invalid, 0 Unknown, 109 Unchecked, 0.1s Time] [2021-11-25 18:46:56,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-25 18:46:56,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-25 18:46:56,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:46:56,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-25 18:46:56,637 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 49 [2021-11-25 18:46:56,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:46:56,638 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-25 18:46:56,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.775) internal successors, (111), 40 states have internal predecessors, (111), 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 18:46:56,638 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-25 18:46:56,638 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-25 18:46:56,640 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATION (20 of 21 remaining) [2021-11-25 18:46:56,640 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATION (19 of 21 remaining) [2021-11-25 18:46:56,641 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATION (18 of 21 remaining) [2021-11-25 18:46:56,641 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATION (17 of 21 remaining) [2021-11-25 18:46:56,641 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATION (16 of 21 remaining) [2021-11-25 18:46:56,641 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATION (15 of 21 remaining) [2021-11-25 18:46:56,641 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATION (14 of 21 remaining) [2021-11-25 18:46:56,641 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATION (13 of 21 remaining) [2021-11-25 18:46:56,641 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATION (12 of 21 remaining) [2021-11-25 18:46:56,641 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATION (11 of 21 remaining) [2021-11-25 18:46:56,641 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATION (10 of 21 remaining) [2021-11-25 18:46:56,641 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATION (9 of 21 remaining) [2021-11-25 18:46:56,642 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12REQUIRES_VIOLATION (8 of 21 remaining) [2021-11-25 18:46:56,642 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13REQUIRES_VIOLATION (7 of 21 remaining) [2021-11-25 18:46:56,642 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14REQUIRES_VIOLATION (6 of 21 remaining) [2021-11-25 18:46:56,642 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15REQUIRES_VIOLATION (5 of 21 remaining) [2021-11-25 18:46:56,642 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE (4 of 21 remaining) [2021-11-25 18:46:56,642 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE (3 of 21 remaining) [2021-11-25 18:46:56,642 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE (2 of 21 remaining) [2021-11-25 18:46:56,642 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK (1 of 21 remaining) [2021-11-25 18:46:56,643 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK (0 of 21 remaining) [2021-11-25 18:46:56,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-25 18:46:56,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:46:56,847 INFO L732 BasicCegarLoop]: Path program histogram: [3, 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] [2021-11-25 18:46:56,849 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-25 18:46:56,853 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 06:46:56 BoogieIcfgContainer [2021-11-25 18:46:56,853 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-25 18:46:56,854 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-25 18:46:56,854 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-25 18:46:56,854 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-25 18:46:56,855 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:38:25" (3/4) ... [2021-11-25 18:46:56,858 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-25 18:46:56,871 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 31 nodes and edges [2021-11-25 18:46:56,872 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2021-11-25 18:46:56,872 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-11-25 18:46:56,873 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-25 18:46:56,913 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/witness.graphml [2021-11-25 18:46:56,914 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-25 18:46:56,914 INFO L158 Benchmark]: Toolchain (without parser) took 512775.21ms. Allocated memory was 136.3MB in the beginning and 627.0MB in the end (delta: 490.7MB). Free memory was 100.2MB in the beginning and 580.6MB in the end (delta: -480.4MB). Peak memory consumption was 11.3MB. Max. memory is 16.1GB. [2021-11-25 18:46:56,914 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 81.8MB. Free memory was 53.4MB in the beginning and 53.4MB in the end (delta: 27.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 18:46:56,914 INFO L158 Benchmark]: CACSL2BoogieTranslator took 686.49ms. Allocated memory is still 136.3MB. Free memory was 99.8MB in the beginning and 104.5MB in the end (delta: -4.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-25 18:46:56,915 INFO L158 Benchmark]: Boogie Procedure Inliner took 97.24ms. Allocated memory is still 136.3MB. Free memory was 104.5MB in the beginning and 102.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 18:46:56,915 INFO L158 Benchmark]: Boogie Preprocessor took 75.58ms. Allocated memory is still 136.3MB. Free memory was 102.4MB in the beginning and 100.7MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 18:46:56,915 INFO L158 Benchmark]: RCFGBuilder took 771.52ms. Allocated memory is still 136.3MB. Free memory was 100.7MB in the beginning and 82.8MB in the end (delta: 17.8MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2021-11-25 18:46:56,915 INFO L158 Benchmark]: TraceAbstraction took 511072.82ms. Allocated memory was 136.3MB in the beginning and 627.0MB in the end (delta: 490.7MB). Free memory was 82.1MB in the beginning and 584.8MB in the end (delta: -502.6MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 18:46:56,915 INFO L158 Benchmark]: Witness Printer took 59.86ms. Allocated memory is still 627.0MB. Free memory was 584.8MB in the beginning and 580.6MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-25 18:46:56,916 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 81.8MB. Free memory was 53.4MB in the beginning and 53.4MB in the end (delta: 27.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 686.49ms. Allocated memory is still 136.3MB. Free memory was 99.8MB in the beginning and 104.5MB in the end (delta: -4.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 97.24ms. Allocated memory is still 136.3MB. Free memory was 104.5MB in the beginning and 102.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 75.58ms. Allocated memory is still 136.3MB. Free memory was 102.4MB in the beginning and 100.7MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 771.52ms. Allocated memory is still 136.3MB. Free memory was 100.7MB in the beginning and 82.8MB in the end (delta: 17.8MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 511072.82ms. Allocated memory was 136.3MB in the beginning and 627.0MB in the end (delta: 490.7MB). Free memory was 82.1MB in the beginning and 584.8MB in the end (delta: -502.6MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 59.86ms. Allocated memory is still 627.0MB. Free memory was 584.8MB in the beginning and 580.6MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 579]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 579]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 580]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 580]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 587]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 587]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 608]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 608]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 611]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 611]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 601]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 601]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 604]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 604]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 594]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 594]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 595]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 595]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 595]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 630]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 613]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 45 locations, 21 error locations. Started 1 CEGAR loops. OverallTime: 511.0s, OverallIterations: 35, TraceHistogramMax: 3, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.1s, AutomataDifference: 29.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4396 SdHoareTripleChecker+Valid, 7.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4396 mSDsluCounter, 4083 SdHoareTripleChecker+Invalid, 5.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 3317 IncrementalHoareTripleChecker+Unchecked, 4963 mSDsCounter, 625 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8991 IncrementalHoareTripleChecker+Invalid, 12933 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 625 mSolverCounterUnsat, 614 mSDtfsCounter, 8991 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2515 GetRequests, 1313 SyntacticMatches, 64 SemanticMatches, 1138 ConstructedPredicates, 75 IntricatePredicates, 0 DeprecatedPredicates, 15344 ImplicationChecksByTransitivity, 242.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=88occurred in iteration=33, InterpolantAutomatonStates: 401, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 35 MinimizatonAttempts, 520 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 2.1s SatisfiabilityAnalysisTime, 306.8s InterpolantComputationTime, 1562 NumberOfCodeBlocks, 1541 NumberOfCodeBlocksAsserted, 66 NumberOfCheckSat, 2106 ConstructedInterpolants, 177 QuantifiedInterpolants, 30322 SizeOfPredicates, 453 NumberOfNonLiveVariables, 7537 ConjunctsInSsa, 1087 ConjunctsInUnsatCore, 79 InterpolantComputations, 14 PerfectInterpolantSequences, 779/1347 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 4.9s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 9, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 20, TOOLS_POST_TIME: 4.7s, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME: 0.0s, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME: 0.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 20, TOOLS_QUANTIFIERELIM_TIME: 4.6s, TOOLS_QUANTIFIERELIM_MAX_TIME: 1.1s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 34, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 3, DOMAIN_JOIN_TIME: 0.1s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 1, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 2, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 9, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME: 2.6s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 2.6s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 2, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 106, DAG_COMPRESSION_RETAINED_NODES: 32, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 21 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-11-25 18:46:57,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3a0ffb-29a8-4ff1-a0fb-4c66c7b22955/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE