./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/dll2n_update_all_reverse.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1eb28e-e9a2-4699-b6e9-e9842fb6821b/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1eb28e-e9a2-4699-b6e9-e9842fb6821b/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1eb28e-e9a2-4699-b6e9-e9842fb6821b/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1eb28e-e9a2-4699-b6e9-e9842fb6821b/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/dll2n_update_all_reverse.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1eb28e-e9a2-4699-b6e9-e9842fb6821b/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1eb28e-e9a2-4699-b6e9-e9842fb6821b/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cab0e4c46b209be0775136f8613c1e239028ef0244464c17ac04057ecb0a0b33 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:47:05,810 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:47:05,812 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:47:05,843 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:47:05,843 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:47:05,845 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:47:05,846 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:47:05,849 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:47:05,851 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:47:05,852 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:47:05,853 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:47:05,855 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:47:05,855 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:47:05,856 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:47:05,858 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:47:05,861 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:47:05,864 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:47:05,869 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:47:05,871 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:47:05,877 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:47:05,885 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:47:05,887 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:47:05,894 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:47:05,895 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:47:05,899 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:47:05,903 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:47:05,903 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:47:05,904 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:47:05,905 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:47:05,907 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:47:05,909 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:47:05,910 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:47:05,911 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:47:05,912 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:47:05,914 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:47:05,915 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:47:05,916 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:47:05,917 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:47:05,917 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:47:05,918 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:47:05,919 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:47:05,920 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1eb28e-e9a2-4699-b6e9-e9842fb6821b/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 01:47:05,954 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:47:05,954 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:47:05,955 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:47:05,955 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:47:05,955 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:47:05,956 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:47:05,956 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:47:05,956 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:47:05,956 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:47:05,957 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:47:05,957 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:47:05,957 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:47:05,957 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:47:05,957 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:47:05,958 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:47:05,958 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:47:05,958 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:47:05,958 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:47:05,959 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:47:05,959 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:47:05,960 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:47:05,960 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:47:05,960 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:47:05,960 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:47:05,960 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:47:05,961 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:47:05,961 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:47:05,961 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:47:05,961 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:47:05,961 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:47:05,962 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:47:05,962 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:47:05,962 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:47:05,962 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:47:05,963 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:47:05,963 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:47:05,963 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:47:05,963 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:47:05,964 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:47:05,964 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:47:05,964 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:47:05,964 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_9b1eb28e-e9a2-4699-b6e9-e9842fb6821b/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1eb28e-e9a2-4699-b6e9-e9842fb6821b/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cab0e4c46b209be0775136f8613c1e239028ef0244464c17ac04057ecb0a0b33 [2021-11-21 01:47:06,191 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:47:06,219 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:47:06,222 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:47:06,223 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:47:06,224 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:47:06,225 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1eb28e-e9a2-4699-b6e9-e9842fb6821b/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/list-simple/dll2n_update_all_reverse.i [2021-11-21 01:47:06,318 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1eb28e-e9a2-4699-b6e9-e9842fb6821b/bin/utaipan-TEXQjIfE4P/data/620e896a9/0d083b93f7454f14a0799af3bb3cc477/FLAG263972f49 [2021-11-21 01:47:06,905 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:47:06,906 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1eb28e-e9a2-4699-b6e9-e9842fb6821b/sv-benchmarks/c/list-simple/dll2n_update_all_reverse.i [2021-11-21 01:47:06,918 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1eb28e-e9a2-4699-b6e9-e9842fb6821b/bin/utaipan-TEXQjIfE4P/data/620e896a9/0d083b93f7454f14a0799af3bb3cc477/FLAG263972f49 [2021-11-21 01:47:07,206 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1eb28e-e9a2-4699-b6e9-e9842fb6821b/bin/utaipan-TEXQjIfE4P/data/620e896a9/0d083b93f7454f14a0799af3bb3cc477 [2021-11-21 01:47:07,208 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:47:07,210 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:47:07,223 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:47:07,223 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:47:07,227 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:47:07,228 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:47:07" (1/1) ... [2021-11-21 01:47:07,229 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27dcd046 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:47:07, skipping insertion in model container [2021-11-21 01:47:07,230 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:47:07" (1/1) ... [2021-11-21 01:47:07,237 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:47:07,282 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:47:07,635 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_9b1eb28e-e9a2-4699-b6e9-e9842fb6821b/sv-benchmarks/c/list-simple/dll2n_update_all_reverse.i[24473,24486] [2021-11-21 01:47:07,645 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:47:07,652 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:47:07,726 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_9b1eb28e-e9a2-4699-b6e9-e9842fb6821b/sv-benchmarks/c/list-simple/dll2n_update_all_reverse.i[24473,24486] [2021-11-21 01:47:07,735 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:47:07,770 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:47:07,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:47:07 WrapperNode [2021-11-21 01:47:07,771 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:47:07,772 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:47:07,772 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:47:07,772 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:47:07,779 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:47:07" (1/1) ... [2021-11-21 01:47:07,793 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:47:07" (1/1) ... [2021-11-21 01:47:07,815 INFO L137 Inliner]: procedures = 126, calls = 27, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 111 [2021-11-21 01:47:07,816 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:47:07,817 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:47:07,817 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:47:07,817 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:47:07,826 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:47:07" (1/1) ... [2021-11-21 01:47:07,826 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:47:07" (1/1) ... [2021-11-21 01:47:07,830 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:47:07" (1/1) ... [2021-11-21 01:47:07,830 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:47:07" (1/1) ... [2021-11-21 01:47:07,836 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:47:07" (1/1) ... [2021-11-21 01:47:07,840 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:47:07" (1/1) ... [2021-11-21 01:47:07,842 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:47:07" (1/1) ... [2021-11-21 01:47:07,845 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:47:07,846 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:47:07,846 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:47:07,847 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:47:07,847 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:47:07" (1/1) ... [2021-11-21 01:47:07,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:47:07,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1eb28e-e9a2-4699-b6e9-e9842fb6821b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:47:07,896 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1eb28e-e9a2-4699-b6e9-e9842fb6821b/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:47:07,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1eb28e-e9a2-4699-b6e9-e9842fb6821b/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:47:07,955 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-11-21 01:47:07,956 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-11-21 01:47:07,956 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 01:47:07,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 01:47:07,956 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 01:47:07,956 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:47:07,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 01:47:07,957 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 01:47:07,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:47:07,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:47:07,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:47:07,957 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:47:08,096 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:47:08,098 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:47:08,138 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-11-21 01:47:08,348 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:47:08,456 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:47:08,457 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-11-21 01:47:08,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:47:08 BoogieIcfgContainer [2021-11-21 01:47:08,459 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:47:08,461 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:47:08,466 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:47:08,469 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:47:08,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:47:07" (1/3) ... [2021-11-21 01:47:08,472 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3998a682 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:47:08, skipping insertion in model container [2021-11-21 01:47:08,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:47:07" (2/3) ... [2021-11-21 01:47:08,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3998a682 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:47:08, skipping insertion in model container [2021-11-21 01:47:08,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:47:08" (3/3) ... [2021-11-21 01:47:08,474 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2n_update_all_reverse.i [2021-11-21 01:47:08,480 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:47:08,481 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:47:08,550 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:47:08,559 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=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 [2021-11-21 01:47:08,560 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:47:08,591 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:47:08,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-21 01:47:08,599 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:47:08,600 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:47:08,600 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:47:08,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:47:08,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1570243634, now seen corresponding path program 1 times [2021-11-21 01:47:08,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:47:08,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943498326] [2021-11-21 01:47:08,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:47:08,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:47:08,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:47:08,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:47:08,890 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:47:08,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943498326] [2021-11-21 01:47:08,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943498326] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:47:08,891 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:47:08,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:47:08,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798558181] [2021-11-21 01:47:08,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:47:08,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:47:08,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:47:08,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:47:08,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:47:08,932 INFO L87 Difference]: Start difference. First operand has 17 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-11-21 01:47:09,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:47:09,009 INFO L93 Difference]: Finished difference Result 31 states and 45 transitions. [2021-11-21 01:47:09,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:47:09,011 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2021-11-21 01:47:09,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:47:09,017 INFO L225 Difference]: With dead ends: 31 [2021-11-21 01:47:09,017 INFO L226 Difference]: Without dead ends: 14 [2021-11-21 01:47:09,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:47:09,026 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:47:09,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 22 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:47:09,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-21 01:47:09,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 12. [2021-11-21 01:47:09,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 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) [2021-11-21 01:47:09,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2021-11-21 01:47:09,059 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 7 [2021-11-21 01:47:09,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:47:09,059 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2021-11-21 01:47:09,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-11-21 01:47:09,061 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2021-11-21 01:47:09,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-21 01:47:09,062 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:47:09,062 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:47:09,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:47:09,063 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:47:09,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:47:09,065 INFO L85 PathProgramCache]: Analyzing trace with hash 299858783, now seen corresponding path program 1 times [2021-11-21 01:47:09,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:47:09,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21371173] [2021-11-21 01:47:09,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:47:09,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:47:09,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:47:09,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:47:09,162 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:47:09,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21371173] [2021-11-21 01:47:09,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21371173] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:47:09,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782665767] [2021-11-21 01:47:09,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:47:09,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:47:09,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1eb28e-e9a2-4699-b6e9-e9842fb6821b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:47:09,165 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1eb28e-e9a2-4699-b6e9-e9842fb6821b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:47:09,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1eb28e-e9a2-4699-b6e9-e9842fb6821b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:47:09,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:47:09,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:47:09,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:47:09,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:47:09,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:47:09,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:47:09,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782665767] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:47:09,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1866032860] [2021-11-21 01:47:09,354 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-21 01:47:09,354 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:47:09,358 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:47:09,364 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:47:09,364 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:47:09,565 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 01:47:09,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2021-11-21 01:47:09,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 17 treesize of output 22 [2021-11-21 01:47:09,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:09,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:09,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:09,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 56 treesize of output 47 [2021-11-21 01:47:09,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:09,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:09,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:09,943 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 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-21 01:47:10,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:10,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:10,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:10,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2021-11-21 01:47:10,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:10,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:10,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:10,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2021-11-21 01:47:10,367 INFO L354 Elim1Store]: treesize reduction 70, result has 34.0 percent of original size [2021-11-21 01:47:10,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 226 treesize of output 249 [2021-11-21 01:47:10,469 INFO L354 Elim1Store]: treesize reduction 54, result has 27.0 percent of original size [2021-11-21 01:47:10,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 243 treesize of output 251 [2021-11-21 01:47:11,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:11,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:11,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:11,922 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-21 01:47:11,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 392 treesize of output 378 [2021-11-21 01:47:11,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:11,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:11,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:11,955 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-21 01:47:11,956 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 377 treesize of output 362 [2021-11-21 01:47:11,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:11,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:11,983 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:47:11,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 358 treesize of output 349 [2021-11-21 01:47:12,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:12,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:12,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:47:12,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:47:12,094 INFO L354 Elim1Store]: treesize reduction 187, result has 17.6 percent of original size [2021-11-21 01:47:12,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 343 treesize of output 346 [2021-11-21 01:47:12,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:12,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:12,128 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:47:12,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 389 treesize of output 380 [2021-11-21 01:47:12,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:12,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:12,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:47:12,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:47:12,218 INFO L354 Elim1Store]: treesize reduction 247, result has 13.9 percent of original size [2021-11-21 01:47:12,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 374 treesize of output 377 [2021-11-21 01:47:12,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:12,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:12,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 260 treesize of output 218 [2021-11-21 01:47:12,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:12,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:12,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:12,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:12,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:12,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 47 [2021-11-21 01:47:13,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:13,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:13,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 32 [2021-11-21 01:47:13,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:13,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:13,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:47:13,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:47:13,873 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-21 01:47:13,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 122 treesize of output 55 [2021-11-21 01:47:14,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:14,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:14,219 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 01:47:14,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 34 [2021-11-21 01:47:14,597 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 [2021-11-21 01:47:14,633 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 [2021-11-21 01:47:14,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:14,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:14,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:14,865 INFO L354 Elim1Store]: treesize reduction 96, result has 21.3 percent of original size [2021-11-21 01:47:14,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 234 treesize of output 229 [2021-11-21 01:47:14,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:14,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:14,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:14,955 INFO L354 Elim1Store]: treesize reduction 128, result has 19.0 percent of original size [2021-11-21 01:47:14,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 265 treesize of output 264 [2021-11-21 01:47:15,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:15,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:15,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:15,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 292 treesize of output 281 [2021-11-21 01:47:15,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:15,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 11 [2021-11-21 01:47:15,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:15,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:15,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:15,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 20 [2021-11-21 01:47:15,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:15,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:15,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:15,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 20 [2021-11-21 01:47:15,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:15,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:15,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:15,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:47:15,441 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 01:47:15,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 97 treesize of output 48 [2021-11-21 01:47:15,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:15,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:15,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:15,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 34 [2021-11-21 01:47:15,744 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 [2021-11-21 01:47:15,779 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 [2021-11-21 01:47:15,969 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:47:16,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1866032860] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:47:16,091 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:47:16,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 7 [2021-11-21 01:47:16,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069371438] [2021-11-21 01:47:16,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:47:16,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:47:16,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:47:16,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:47:16,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:47:16,094 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 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) [2021-11-21 01:47:16,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:47:16,173 INFO L93 Difference]: Finished difference Result 19 states and 26 transitions. [2021-11-21 01:47:16,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:47:16,174 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 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 [2021-11-21 01:47:16,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:47:16,174 INFO L225 Difference]: With dead ends: 19 [2021-11-21 01:47:16,174 INFO L226 Difference]: Without dead ends: 14 [2021-11-21 01:47:16,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:47:16,176 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 15 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:47:16,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 12 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:47:16,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-21 01:47:16,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2021-11-21 01:47:16,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 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) [2021-11-21 01:47:16,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 17 transitions. [2021-11-21 01:47:16,182 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 17 transitions. Word has length 10 [2021-11-21 01:47:16,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:47:16,182 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 17 transitions. [2021-11-21 01:47:16,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 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) [2021-11-21 01:47:16,182 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 17 transitions. [2021-11-21 01:47:16,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-21 01:47:16,183 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:47:16,183 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:47:16,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1eb28e-e9a2-4699-b6e9-e9842fb6821b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:47:16,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1eb28e-e9a2-4699-b6e9-e9842fb6821b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:47:16,397 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:47:16,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:47:16,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1448453533, now seen corresponding path program 1 times [2021-11-21 01:47:16,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:47:16,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289221860] [2021-11-21 01:47:16,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:47:16,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:47:16,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:47:16,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:47:16,452 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:47:16,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289221860] [2021-11-21 01:47:16,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289221860] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:47:16,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575345244] [2021-11-21 01:47:16,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:47:16,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:47:16,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1eb28e-e9a2-4699-b6e9-e9842fb6821b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:47:16,454 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1eb28e-e9a2-4699-b6e9-e9842fb6821b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:47:16,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1eb28e-e9a2-4699-b6e9-e9842fb6821b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:47:16,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:47:16,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:47:16,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:47:16,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:47:16,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:47:16,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:47:16,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575345244] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:47:16,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1954658446] [2021-11-21 01:47:16,597 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-21 01:47:16,603 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:47:16,604 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:47:16,604 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:47:16,604 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:47:16,725 INFO L354 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2021-11-21 01:47:16,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 30 [2021-11-21 01:47:16,779 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 01:47:16,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2021-11-21 01:47:16,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:16,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:16,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:16,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2021-11-21 01:47:16,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:16,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:16,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:16,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2021-11-21 01:47:17,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:17,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:17,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:17,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 47 [2021-11-21 01:47:17,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:17,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:17,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:17,057 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 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-21 01:47:17,263 INFO L354 Elim1Store]: treesize reduction 70, result has 34.0 percent of original size [2021-11-21 01:47:17,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 226 treesize of output 249 [2021-11-21 01:47:17,323 INFO L354 Elim1Store]: treesize reduction 54, result has 27.0 percent of original size [2021-11-21 01:47:17,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 243 treesize of output 251 [2021-11-21 01:47:18,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:18,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:18,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:18,272 INFO L354 Elim1Store]: treesize reduction 106, result has 12.4 percent of original size [2021-11-21 01:47:18,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 400 treesize of output 386 [2021-11-21 01:47:18,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:18,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:18,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:18,355 INFO L354 Elim1Store]: treesize reduction 79, result has 8.1 percent of original size [2021-11-21 01:47:18,355 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 6 case distinctions, treesize of input 385 treesize of output 370 [2021-11-21 01:47:18,446 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-21 01:47:18,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 366 treesize of output 357 [2021-11-21 01:47:18,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:18,581 INFO L354 Elim1Store]: treesize reduction 353, result has 11.5 percent of original size [2021-11-21 01:47:18,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 351 treesize of output 356 [2021-11-21 01:47:18,624 INFO L354 Elim1Store]: treesize reduction 128, result has 19.5 percent of original size [2021-11-21 01:47:18,625 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 3 case distinctions, treesize of input 443 treesize of output 434 [2021-11-21 01:47:18,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:18,714 INFO L354 Elim1Store]: treesize reduction 569, result has 10.1 percent of original size [2021-11-21 01:47:18,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 428 treesize of output 439 [2021-11-21 01:47:18,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:18,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:18,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:18,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 40 [2021-11-21 01:47:19,056 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:47:19,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:19,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:19,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:19,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:19,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:19,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 53 [2021-11-21 01:47:19,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:19,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:19,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:19,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 37 [2021-11-21 01:47:20,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:20,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:47:20,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:20,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:47:20,242 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-21 01:47:20,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 154 treesize of output 79 [2021-11-21 01:47:20,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:20,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:20,614 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 01:47:20,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 41 [2021-11-21 01:47:20,856 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 [2021-11-21 01:47:20,897 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 [2021-11-21 01:47:21,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:21,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:21,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:21,137 INFO L354 Elim1Store]: treesize reduction 96, result has 21.3 percent of original size [2021-11-21 01:47:21,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 234 treesize of output 229 [2021-11-21 01:47:21,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:21,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:21,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:21,215 INFO L354 Elim1Store]: treesize reduction 128, result has 19.0 percent of original size [2021-11-21 01:47:21,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 265 treesize of output 264 [2021-11-21 01:47:21,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:21,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:21,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:21,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 292 treesize of output 281 [2021-11-21 01:47:21,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:21,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 11 [2021-11-21 01:47:21,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:21,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:21,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:21,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 20 [2021-11-21 01:47:21,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:21,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:21,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:21,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 20 [2021-11-21 01:47:21,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:21,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:21,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:21,687 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:47:21,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 87 treesize of output 44 [2021-11-21 01:47:21,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:21,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:21,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:21,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:47:21,751 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 01:47:21,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 44 [2021-11-21 01:47:21,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:21,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:21,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:21,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 34 [2021-11-21 01:47:22,162 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 [2021-11-21 01:47:22,182 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 [2021-11-21 01:47:22,520 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:47:22,525 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:47:22,533 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:47:22,608 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:47:22,610 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:47:22,632 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:47:22,655 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:47:22,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1954658446] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:47:22,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:47:22,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3, 3, 3] total 8 [2021-11-21 01:47:22,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216889451] [2021-11-21 01:47:22,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:47:22,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:47:22,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:47:22,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:47:22,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:47:22,872 INFO L87 Difference]: Start difference. First operand 13 states and 17 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 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) [2021-11-21 01:47:22,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:47:22,943 INFO L93 Difference]: Finished difference Result 22 states and 31 transitions. [2021-11-21 01:47:22,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:47:22,944 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 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 12 [2021-11-21 01:47:22,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:47:22,944 INFO L225 Difference]: With dead ends: 22 [2021-11-21 01:47:22,944 INFO L226 Difference]: Without dead ends: 15 [2021-11-21 01:47:22,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:47:22,946 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 17 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:47:22,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 13 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:47:22,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-21 01:47:22,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2021-11-21 01:47:22,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 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) [2021-11-21 01:47:22,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2021-11-21 01:47:22,952 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 12 [2021-11-21 01:47:22,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:47:22,953 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2021-11-21 01:47:22,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 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) [2021-11-21 01:47:22,953 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2021-11-21 01:47:22,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-21 01:47:22,954 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:47:22,954 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:47:22,993 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1eb28e-e9a2-4699-b6e9-e9842fb6821b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-21 01:47:23,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1eb28e-e9a2-4699-b6e9-e9842fb6821b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:47:23,171 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:47:23,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:47:23,171 INFO L85 PathProgramCache]: Analyzing trace with hash 474531345, now seen corresponding path program 1 times [2021-11-21 01:47:23,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:47:23,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537726318] [2021-11-21 01:47:23,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:47:23,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:47:23,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:47:23,221 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:47:23,221 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:47:23,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537726318] [2021-11-21 01:47:23,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537726318] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:47:23,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961121463] [2021-11-21 01:47:23,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:47:23,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:47:23,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1eb28e-e9a2-4699-b6e9-e9842fb6821b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:47:23,226 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1eb28e-e9a2-4699-b6e9-e9842fb6821b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:47:23,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1eb28e-e9a2-4699-b6e9-e9842fb6821b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:47:23,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:47:23,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:47:23,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:47:23,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:47:23,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:47:23,359 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:47:23,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961121463] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:47:23,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [707870456] [2021-11-21 01:47:23,362 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-21 01:47:23,362 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:47:23,362 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:47:23,363 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:47:23,363 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:47:23,458 INFO L354 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2021-11-21 01:47:23,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 30 [2021-11-21 01:47:23,518 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 01:47:23,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2021-11-21 01:47:23,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:23,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:23,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:23,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2021-11-21 01:47:23,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:23,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:23,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:23,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 56 treesize of output 47 [2021-11-21 01:47:23,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:23,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:23,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:23,726 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 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-21 01:47:23,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:23,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:23,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:23,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2021-11-21 01:47:23,882 INFO L354 Elim1Store]: treesize reduction 70, result has 34.0 percent of original size [2021-11-21 01:47:23,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 226 treesize of output 249 [2021-11-21 01:47:23,930 INFO L354 Elim1Store]: treesize reduction 54, result has 27.0 percent of original size [2021-11-21 01:47:23,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 243 treesize of output 251 [2021-11-21 01:47:24,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:24,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:24,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:24,974 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-21 01:47:24,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 392 treesize of output 378 [2021-11-21 01:47:24,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:24,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:24,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:24,995 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-21 01:47:24,995 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 377 treesize of output 362 [2021-11-21 01:47:25,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:25,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:25,032 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:47:25,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 358 treesize of output 349 [2021-11-21 01:47:25,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:25,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:25,055 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:47:25,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 343 treesize of output 334 [2021-11-21 01:47:25,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:25,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:47:25,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:25,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:47:25,161 INFO L354 Elim1Store]: treesize reduction 187, result has 17.6 percent of original size [2021-11-21 01:47:25,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 328 treesize of output 331 [2021-11-21 01:47:25,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:25,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:47:25,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:25,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:47:25,264 INFO L354 Elim1Store]: treesize reduction 301, result has 16.2 percent of original size [2021-11-21 01:47:25,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 446 treesize of output 449 [2021-11-21 01:47:25,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:25,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:25,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 260 treesize of output 218 [2021-11-21 01:47:25,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:25,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:25,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:25,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:25,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:25,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 47 [2021-11-21 01:47:26,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:26,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:26,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:26,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 29 [2021-11-21 01:47:26,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:26,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:26,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:47:26,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:47:26,780 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-21 01:47:26,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 78 treesize of output 29 [2021-11-21 01:47:27,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:27,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:27,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 68 [2021-11-21 01:47:27,653 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 [2021-11-21 01:47:27,676 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 [2021-11-21 01:47:27,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:27,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:27,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:27,910 INFO L354 Elim1Store]: treesize reduction 92, result has 24.6 percent of original size [2021-11-21 01:47:27,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 234 treesize of output 233 [2021-11-21 01:47:27,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:27,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:27,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:27,994 INFO L354 Elim1Store]: treesize reduction 132, result has 16.5 percent of original size [2021-11-21 01:47:27,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 275 treesize of output 264 [2021-11-21 01:47:28,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:28,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:28,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:28,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 292 treesize of output 281 [2021-11-21 01:47:28,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:28,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 11 [2021-11-21 01:47:28,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:28,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:28,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:28,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 20 [2021-11-21 01:47:28,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:28,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:28,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:28,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 23 [2021-11-21 01:47:28,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:28,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:28,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:28,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:47:28,488 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 01:47:28,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 29 [2021-11-21 01:47:28,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:28,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:28,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:28,581 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:47:28,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 29 [2021-11-21 01:47:28,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:28,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:28,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:28,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 56 [2021-11-21 01:47:28,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:28,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:28,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:28,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 41 [2021-11-21 01:47:29,051 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 [2021-11-21 01:47:29,072 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 [2021-11-21 01:47:29,393 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:47:29,409 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:47:29,418 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:47:29,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-21 01:47:29,706 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-21 01:47:29,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 174 treesize of output 172 [2021-11-21 01:47:29,735 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-21 01:47:29,736 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 172 treesize of output 170 [2021-11-21 01:47:30,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-21 01:47:30,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-21 01:47:30,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-21 01:47:31,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-21 01:47:31,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 01:47:31,080 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 11 treesize of output 7 [2021-11-21 01:47:31,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-21 01:47:31,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-21 01:47:31,442 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:47:32,451 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:47:33,403 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:47:33,404 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:47:33,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2021-11-21 01:47:33,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983074382] [2021-11-21 01:47:33,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:47:33,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:47:33,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:47:33,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:47:33,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-11-21 01:47:33,405 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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) [2021-11-21 01:47:33,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:47:33,444 INFO L93 Difference]: Finished difference Result 26 states and 34 transitions. [2021-11-21 01:47:33,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:47:33,445 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 13 [2021-11-21 01:47:33,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:47:33,445 INFO L225 Difference]: With dead ends: 26 [2021-11-21 01:47:33,445 INFO L226 Difference]: Without dead ends: 17 [2021-11-21 01:47:33,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-11-21 01:47:33,446 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:47:33,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 20 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:47:33,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-21 01:47:33,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-21 01:47:33,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 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) [2021-11-21 01:47:33,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2021-11-21 01:47:33,452 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 13 [2021-11-21 01:47:33,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:47:33,453 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2021-11-21 01:47:33,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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) [2021-11-21 01:47:33,453 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2021-11-21 01:47:33,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-21 01:47:33,454 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:47:33,454 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:47:33,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1eb28e-e9a2-4699-b6e9-e9842fb6821b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:47:33,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1eb28e-e9a2-4699-b6e9-e9842fb6821b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:47:33,655 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:47:33,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:47:33,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1856804994, now seen corresponding path program 2 times [2021-11-21 01:47:33,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:47:33,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949405355] [2021-11-21 01:47:33,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:47:33,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:47:33,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:47:33,784 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:47:33,784 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:47:33,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949405355] [2021-11-21 01:47:33,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949405355] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:47:33,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609973808] [2021-11-21 01:47:33,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:47:33,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:47:33,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1eb28e-e9a2-4699-b6e9-e9842fb6821b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:47:33,785 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1eb28e-e9a2-4699-b6e9-e9842fb6821b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:47:33,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1eb28e-e9a2-4699-b6e9-e9842fb6821b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 01:47:33,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-11-21 01:47:33,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:47:33,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:47:33,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:47:33,863 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 01:47:33,863 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:47:33,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609973808] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:47:33,864 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:47:33,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2021-11-21 01:47:33,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460297098] [2021-11-21 01:47:33,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:47:33,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:47:33,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:47:33,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:47:33,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:47:33,866 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 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) [2021-11-21 01:47:33,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:47:33,912 INFO L93 Difference]: Finished difference Result 19 states and 24 transitions. [2021-11-21 01:47:33,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:47:33,914 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 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 16 [2021-11-21 01:47:33,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:47:33,914 INFO L225 Difference]: With dead ends: 19 [2021-11-21 01:47:33,915 INFO L226 Difference]: Without dead ends: 0 [2021-11-21 01:47:33,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:47:33,916 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:47:33,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:47:33,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-21 01:47:33,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-21 01:47:33,917 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) [2021-11-21 01:47:33,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-21 01:47:33,917 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2021-11-21 01:47:33,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:47:33,917 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-21 01:47:33,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 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) [2021-11-21 01:47:33,918 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-21 01:47:33,918 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-21 01:47:33,920 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-21 01:47:33,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1eb28e-e9a2-4699-b6e9-e9842fb6821b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 01:47:34,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1eb28e-e9a2-4699-b6e9-e9842fb6821b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:47:34,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-21 01:47:34,484 INFO L861 garLoopResultBuilder]: At program point myexitENTRY(lines 572 574) the Hoare annotation is: true [2021-11-21 01:47:34,484 INFO L861 garLoopResultBuilder]: At program point L573(line 573) the Hoare annotation is: true [2021-11-21 01:47:34,484 INFO L858 garLoopResultBuilder]: For program point myexitEXIT(lines 572 574) no Hoare annotation was computed. [2021-11-21 01:47:34,484 INFO L858 garLoopResultBuilder]: For program point L589(lines 589 591) no Hoare annotation was computed. [2021-11-21 01:47:34,484 INFO L858 garLoopResultBuilder]: For program point L589-1(lines 589 591) no Hoare annotation was computed. [2021-11-21 01:47:34,484 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-21 01:47:34,484 INFO L861 garLoopResultBuilder]: At program point L590(line 590) the Hoare annotation is: true [2021-11-21 01:47:34,485 INFO L854 garLoopResultBuilder]: At program point L633-3(lines 633 638) the Hoare annotation is: (and (<= 1 |ULTIMATE.start_dll_create_~data#1|) (<= |ULTIMATE.start_main_~data~0#1| 1) (<= 0 |#NULL.base|) (<= 2 |ULTIMATE.start_main_~len~0#1|) (<= 2 |ULTIMATE.start_dll_create_#in~len#1|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_dll_create_~len#1| 2) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~len~0#1| 2) (<= |ULTIMATE.start_dll_create_~data#1| 1) (<= |#NULL.base| 0) (<= |ULTIMATE.start_dll_create_#in~len#1| 2) (<= 1 |ULTIMATE.start_dll_create_#in~data#1|) (<= |ULTIMATE.start_dll_create_#in~data#1| 1) (<= |ULTIMATE.start_dll_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_create_~head~0#1.offset|) (<= 0 |#NULL.offset|) (<= 1 |ULTIMATE.start_main_~data~0#1|) (<= 0 |#StackHeapBarrier|)) [2021-11-21 01:47:34,485 INFO L861 garLoopResultBuilder]: At program point L642(lines 624 643) the Hoare annotation is: true [2021-11-21 01:47:34,485 INFO L854 garLoopResultBuilder]: At program point L618-2(lines 618 621) the Hoare annotation is: (and (<= 1 |ULTIMATE.start_dll_create_~data#1|) (<= |ULTIMATE.start_main_~data~0#1| 1) (<= 0 |#NULL.base|) (<= 2 |ULTIMATE.start_main_~len~0#1|) (<= 2 |ULTIMATE.start_dll_create_#in~len#1|) (<= |ULTIMATE.start_dll_create_~len#1| 2) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~len~0#1| 2) (<= |ULTIMATE.start_dll_create_~data#1| 1) (<= |#NULL.base| 0) (<= |ULTIMATE.start_dll_create_#in~len#1| 2) (<= 1 |ULTIMATE.start_dll_create_#in~data#1|) (<= |ULTIMATE.start_dll_create_#in~data#1| 1) (<= |ULTIMATE.start_dll_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_create_~head~0#1.offset|) (<= 0 |#NULL.offset|) (<= 1 |ULTIMATE.start_main_~data~0#1|) (<= 0 |#StackHeapBarrier|)) [2021-11-21 01:47:34,485 INFO L858 garLoopResultBuilder]: For program point L635(lines 635 637) no Hoare annotation was computed. [2021-11-21 01:47:34,485 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 641) no Hoare annotation was computed. [2021-11-21 01:47:34,485 INFO L854 garLoopResultBuilder]: At program point L611-2(lines 611 614) the Hoare annotation is: false [2021-11-21 01:47:34,486 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-21 01:47:34,486 INFO L854 garLoopResultBuilder]: At program point L636(lines 624 643) the Hoare annotation is: false [2021-11-21 01:47:34,486 INFO L854 garLoopResultBuilder]: At program point L587-2(lines 587 600) the Hoare annotation is: (and (<= 1 |ULTIMATE.start_dll_create_~data#1|) (<= |ULTIMATE.start_main_~data~0#1| 1) (<= 0 |#NULL.base|) (<= 2 |ULTIMATE.start_main_~len~0#1|) (<= 2 |ULTIMATE.start_dll_create_#in~len#1|) (<= |ULTIMATE.start_dll_create_~len#1| 2) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~len~0#1| 2) (<= |ULTIMATE.start_dll_create_~data#1| 1) (<= |#NULL.base| 0) (<= |ULTIMATE.start_dll_create_#in~len#1| 2) (<= 1 |ULTIMATE.start_dll_create_#in~data#1|) (<= |ULTIMATE.start_dll_create_#in~data#1| 1) (<= |ULTIMATE.start_dll_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_create_~head~0#1.offset|) (<= 0 |#NULL.offset|) (<= 1 |ULTIMATE.start_main_~data~0#1|) (<= 0 |#StackHeapBarrier|)) [2021-11-21 01:47:34,486 INFO L861 garLoopResultBuilder]: At program point L604-2(lines 604 608) the Hoare annotation is: true [2021-11-21 01:47:34,486 INFO L854 garLoopResultBuilder]: At program point L629-3(lines 629 632) the Hoare annotation is: (and (<= 1 |ULTIMATE.start_dll_create_~data#1|) (<= |ULTIMATE.start_main_~data~0#1| 1) (<= 0 |#NULL.base|) (<= 2 |ULTIMATE.start_main_~len~0#1|) (<= 2 |ULTIMATE.start_dll_create_#in~len#1|) (<= |ULTIMATE.start_dll_create_~len#1| 2) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~len~0#1| 2) (<= |ULTIMATE.start_dll_create_~data#1| 1) (<= |#NULL.base| 0) (<= |ULTIMATE.start_dll_create_#in~len#1| 2) (<= 1 |ULTIMATE.start_dll_create_#in~data#1|) (<= |ULTIMATE.start_dll_create_#in~data#1| 1) (<= |ULTIMATE.start_dll_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_create_~head~0#1.offset|) (<= 0 |#NULL.offset|) (<= 1 |ULTIMATE.start_main_~data~0#1|) (<= 0 |#StackHeapBarrier|)) [2021-11-21 01:47:34,489 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2021-11-21 01:47:34,490 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-21 01:47:34,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 01:47:34 BoogieIcfgContainer [2021-11-21 01:47:34,507 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-21 01:47:34,508 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-21 01:47:34,508 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-21 01:47:34,508 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-21 01:47:34,508 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:47:08" (3/4) ... [2021-11-21 01:47:34,511 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-21 01:47:34,517 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure myexit [2021-11-21 01:47:34,522 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 25 nodes and edges [2021-11-21 01:47:34,523 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2021-11-21 01:47:34,523 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-11-21 01:47:34,523 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-21 01:47:34,547 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((((((((((((1 <= data && data <= 1) && 0 <= #NULL) && 2 <= len) && 2 <= \old(len)) && len <= 2) && #NULL <= 0) && len <= 2) && data <= 1) && #NULL <= 0) && \old(len) <= 2) && 1 <= \old(data)) && \old(data) <= 1) && head <= 0) && 0 <= head) && 0 <= #NULL) && 1 <= data) && 0 <= unknown-#StackHeapBarrier-unknown [2021-11-21 01:47:34,548 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((((((((((((1 <= data && data <= 1) && 0 <= #NULL) && 2 <= len) && 2 <= \old(len)) && len <= 2) && #NULL <= 0) && len <= 2) && data <= 1) && #NULL <= 0) && \old(len) <= 2) && 1 <= \old(data)) && \old(data) <= 1) && head <= 0) && 0 <= head) && 0 <= #NULL) && 1 <= data) && 0 <= unknown-#StackHeapBarrier-unknown [2021-11-21 01:47:34,548 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((((((((((((((((1 <= data && data <= 1) && 0 <= #NULL) && 2 <= len) && 2 <= \old(len)) && 1 <= i) && len <= 2) && #NULL <= 0) && len <= 2) && data <= 1) && #NULL <= 0) && \old(len) <= 2) && 1 <= \old(data)) && \old(data) <= 1) && head <= 0) && 0 <= head) && 0 <= #NULL) && 1 <= data) && 0 <= unknown-#StackHeapBarrier-unknown [2021-11-21 01:47:34,549 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((((((((((((1 <= data && data <= 1) && 0 <= #NULL) && 2 <= len) && 2 <= \old(len)) && len <= 2) && #NULL <= 0) && len <= 2) && data <= 1) && #NULL <= 0) && \old(len) <= 2) && 1 <= \old(data)) && \old(data) <= 1) && head <= 0) && 0 <= head) && 0 <= #NULL) && 1 <= data) && 0 <= unknown-#StackHeapBarrier-unknown [2021-11-21 01:47:34,564 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1eb28e-e9a2-4699-b6e9-e9842fb6821b/bin/utaipan-TEXQjIfE4P/witness.graphml [2021-11-21 01:47:34,564 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-21 01:47:34,565 INFO L158 Benchmark]: Toolchain (without parser) took 27355.00ms. Allocated memory was 130.0MB in the beginning and 199.2MB in the end (delta: 69.2MB). Free memory was 96.5MB in the beginning and 122.3MB in the end (delta: -25.8MB). Peak memory consumption was 43.0MB. Max. memory is 16.1GB. [2021-11-21 01:47:34,565 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 86.0MB. Free memory was 41.6MB in the beginning and 41.5MB in the end (delta: 40.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 01:47:34,566 INFO L158 Benchmark]: CACSL2BoogieTranslator took 547.75ms. Allocated memory is still 130.0MB. Free memory was 96.3MB in the beginning and 98.3MB in the end (delta: -2.1MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-21 01:47:34,566 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.80ms. Allocated memory is still 130.0MB. Free memory was 98.3MB in the beginning and 96.1MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 01:47:34,567 INFO L158 Benchmark]: Boogie Preprocessor took 28.57ms. Allocated memory is still 130.0MB. Free memory was 96.1MB in the beginning and 94.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 01:47:34,567 INFO L158 Benchmark]: RCFGBuilder took 613.29ms. Allocated memory is still 130.0MB. Free memory was 94.6MB in the beginning and 79.1MB in the end (delta: 15.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-21 01:47:34,567 INFO L158 Benchmark]: TraceAbstraction took 26045.99ms. Allocated memory was 130.0MB in the beginning and 199.2MB in the end (delta: 69.2MB). Free memory was 78.6MB in the beginning and 126.5MB in the end (delta: -47.9MB). Peak memory consumption was 24.5MB. Max. memory is 16.1GB. [2021-11-21 01:47:34,568 INFO L158 Benchmark]: Witness Printer took 56.87ms. Allocated memory is still 199.2MB. Free memory was 125.4MB in the beginning and 122.3MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-21 01:47:34,570 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 86.0MB. Free memory was 41.6MB in the beginning and 41.5MB in the end (delta: 40.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 547.75ms. Allocated memory is still 130.0MB. Free memory was 96.3MB in the beginning and 98.3MB in the end (delta: -2.1MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 44.80ms. Allocated memory is still 130.0MB. Free memory was 98.3MB in the beginning and 96.1MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 28.57ms. Allocated memory is still 130.0MB. Free memory was 96.1MB in the beginning and 94.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 613.29ms. Allocated memory is still 130.0MB. Free memory was 94.6MB in the beginning and 79.1MB in the end (delta: 15.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 26045.99ms. Allocated memory was 130.0MB in the beginning and 199.2MB in the end (delta: 69.2MB). Free memory was 78.6MB in the beginning and 126.5MB in the end (delta: -47.9MB). Peak memory consumption was 24.5MB. Max. memory is 16.1GB. * Witness Printer took 56.87ms. Allocated memory is still 199.2MB. Free memory was 125.4MB in the beginning and 122.3MB in the end (delta: 3.1MB). 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: 641]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 25.9s, OverallIterations: 5, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 42 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 42 mSDsluCounter, 73 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 66 mSDsCounter, 8 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 128 IncrementalHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 8 mSolverCounterUnsat, 29 mSDtfsCounter, 128 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 132 GetRequests, 99 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=0, InterpolantAutomatonStates: 22, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 4 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 13 PreInvPairs, 24 NumberOfFragments, 230 HoareAnnotationTreeSize, 13 FomulaSimplifications, 9 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 1147 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 109 NumberOfCodeBlocks, 100 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 132 ConstructedInterpolants, 0 QuantifiedInterpolants, 268 SizeOfPredicates, 7 NumberOfNonLiveVariables, 420 ConjunctsInSsa, 18 ConjunctsInUnsatCore, 12 InterpolantComputations, 2 PerfectInterpolantSequences, 18/32 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: 12.7s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 2, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 12, DAG_INTERPRETER_EARLY_EXITS: 3, TOOLS_POST_APPLICATIONS: 32, TOOLS_POST_TIME: 12.5s, 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: 31, TOOLS_QUANTIFIERELIM_TIME: 12.5s, TOOLS_QUANTIFIERELIM_MAX_TIME: 2.8s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 62, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 0, DOMAIN_JOIN_TIME: 0.0s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 4, DOMAIN_WIDEN_TIME: 0.1s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 7, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 12, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 3, LOOP_SUMMARIZER_CACHE_MISSES: 3, LOOP_SUMMARIZER_OVERALL_TIME: 11.8s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 11.8s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 7, 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: 185, DAG_COMPRESSION_RETAINED_NODES: 63, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 633]: Loop Invariant Derived loop invariant: (((((((((((((((((1 <= data && data <= 1) && 0 <= #NULL) && 2 <= len) && 2 <= \old(len)) && 1 <= i) && len <= 2) && #NULL <= 0) && len <= 2) && data <= 1) && #NULL <= 0) && \old(len) <= 2) && 1 <= \old(data)) && \old(data) <= 1) && head <= 0) && 0 <= head) && 0 <= #NULL) && 1 <= data) && 0 <= unknown-#StackHeapBarrier-unknown - InvariantResult [Line: 611]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 624]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 587]: Loop Invariant Derived loop invariant: ((((((((((((((((1 <= data && data <= 1) && 0 <= #NULL) && 2 <= len) && 2 <= \old(len)) && len <= 2) && #NULL <= 0) && len <= 2) && data <= 1) && #NULL <= 0) && \old(len) <= 2) && 1 <= \old(data)) && \old(data) <= 1) && head <= 0) && 0 <= head) && 0 <= #NULL) && 1 <= data) && 0 <= unknown-#StackHeapBarrier-unknown - InvariantResult [Line: 604]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 629]: Loop Invariant Derived loop invariant: ((((((((((((((((1 <= data && data <= 1) && 0 <= #NULL) && 2 <= len) && 2 <= \old(len)) && len <= 2) && #NULL <= 0) && len <= 2) && data <= 1) && #NULL <= 0) && \old(len) <= 2) && 1 <= \old(data)) && \old(data) <= 1) && head <= 0) && 0 <= head) && 0 <= #NULL) && 1 <= data) && 0 <= unknown-#StackHeapBarrier-unknown - InvariantResult [Line: 573]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 624]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 618]: Loop Invariant Derived loop invariant: ((((((((((((((((1 <= data && data <= 1) && 0 <= #NULL) && 2 <= len) && 2 <= \old(len)) && len <= 2) && #NULL <= 0) && len <= 2) && data <= 1) && #NULL <= 0) && \old(len) <= 2) && 1 <= \old(data)) && \old(data) <= 1) && head <= 0) && 0 <= head) && 0 <= #NULL) && 1 <= data) && 0 <= unknown-#StackHeapBarrier-unknown RESULT: Ultimate proved your program to be correct! [2021-11-21 01:47:34,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1eb28e-e9a2-4699-b6e9-e9842fb6821b/bin/utaipan-TEXQjIfE4P/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