./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2n_update_all_reverse.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2n_update_all_reverse.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 60a477b5dcc7be77af17ce3cc379f1876781ed95f896fb2ca2dbb7ba91ecb849 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:08:07,913 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:08:07,916 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:08:07,960 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:08:07,968 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:08:07,974 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:08:07,978 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:08:07,983 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:08:07,986 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:08:07,996 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:08:07,997 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:08:07,999 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:08:08,000 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:08:08,003 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:08:08,005 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:08:08,008 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:08:08,011 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:08:08,012 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:08:08,019 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:08:08,023 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:08:08,030 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:08:08,032 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:08:08,037 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:08:08,038 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:08:08,045 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:08:08,046 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:08:08,046 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:08:08,049 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:08:08,050 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:08:08,051 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:08:08,053 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:08:08,054 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:08:08,056 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:08:08,058 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:08:08,060 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:08:08,060 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:08:08,061 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:08:08,061 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:08:08,061 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:08:08,063 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:08:08,063 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:08:08,064 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-25 18:08:08,127 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:08:08,128 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:08:08,129 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:08:08,129 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:08:08,130 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:08:08,130 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:08:08,131 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:08:08,131 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:08:08,131 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:08:08,132 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:08:08,133 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:08:08,134 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:08:08,134 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:08:08,134 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:08:08,134 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:08:08,135 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:08:08,135 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:08:08,135 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:08:08,136 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-25 18:08:08,136 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-25 18:08:08,137 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:08:08,137 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:08:08,137 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 18:08:08,140 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:08:08,140 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:08:08,141 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:08:08,141 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-25 18:08:08,141 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-25 18:08:08,141 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-25 18:08:08,142 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:08:08,142 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 18:08:08,142 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:08:08,143 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:08:08,143 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:08:08,143 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:08:08,144 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:08:08,144 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:08:08,144 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:08:08,145 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:08:08,145 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:08:08,145 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:08:08,145 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:08:08,146 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_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 60a477b5dcc7be77af17ce3cc379f1876781ed95f896fb2ca2dbb7ba91ecb849 [2021-11-25 18:08:08,503 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:08:08,527 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:08:08,530 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:08:08,532 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:08:08,533 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:08:08,534 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/list-simple/sll2n_update_all_reverse.i [2021-11-25 18:08:08,607 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/data/ad4329bc1/e7a69d96ae3d4e9993ceed58e67bc9db/FLAG1056db872 [2021-11-25 18:08:09,247 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:08:09,248 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/sv-benchmarks/c/list-simple/sll2n_update_all_reverse.i [2021-11-25 18:08:09,264 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/data/ad4329bc1/e7a69d96ae3d4e9993ceed58e67bc9db/FLAG1056db872 [2021-11-25 18:08:09,486 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/data/ad4329bc1/e7a69d96ae3d4e9993ceed58e67bc9db [2021-11-25 18:08:09,488 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:08:09,490 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:08:09,493 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:08:09,493 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:08:09,496 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:08:09,497 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:08:09" (1/1) ... [2021-11-25 18:08:09,498 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b61529f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:08:09, skipping insertion in model container [2021-11-25 18:08:09,499 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:08:09" (1/1) ... [2021-11-25 18:08:09,508 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:08:09,556 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:08:09,971 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_093dc819-1924-4ee4-8a04-ea18d33a379d/sv-benchmarks/c/list-simple/sll2n_update_all_reverse.i[24236,24249] [2021-11-25 18:08:09,981 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:08:10,003 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:08:10,085 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_093dc819-1924-4ee4-8a04-ea18d33a379d/sv-benchmarks/c/list-simple/sll2n_update_all_reverse.i[24236,24249] [2021-11-25 18:08:10,087 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:08:10,126 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:08:10,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:08:10 WrapperNode [2021-11-25 18:08:10,126 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:08:10,127 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:08:10,128 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:08:10,128 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:08:10,137 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:08:10" (1/1) ... [2021-11-25 18:08:10,168 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:08:10" (1/1) ... [2021-11-25 18:08:10,208 INFO L137 Inliner]: procedures = 126, calls = 22, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 121 [2021-11-25 18:08:10,209 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:08:10,210 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:08:10,210 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:08:10,210 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:08:10,221 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:08:10" (1/1) ... [2021-11-25 18:08:10,221 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:08:10" (1/1) ... [2021-11-25 18:08:10,226 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:08:10" (1/1) ... [2021-11-25 18:08:10,227 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:08:10" (1/1) ... [2021-11-25 18:08:10,237 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:08:10" (1/1) ... [2021-11-25 18:08:10,243 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:08:10" (1/1) ... [2021-11-25 18:08:10,245 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:08:10" (1/1) ... [2021-11-25 18:08:10,249 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:08:10,251 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:08:10,251 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:08:10,251 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:08:10,252 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:08:10" (1/1) ... [2021-11-25 18:08:10,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:08:10,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:08:10,312 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:08:10,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:08:10,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 18:08:10,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 18:08:10,373 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 18:08:10,374 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:08:10,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 18:08:10,374 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 18:08:10,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 18:08:10,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:08:10,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:08:10,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:08:10,573 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:08:10,575 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:08:10,931 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:08:10,998 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:08:10,998 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-11-25 18:08:11,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:08:11 BoogieIcfgContainer [2021-11-25 18:08:11,002 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:08:11,004 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:08:11,004 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:08:11,008 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:08:11,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:08:09" (1/3) ... [2021-11-25 18:08:11,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b93cb87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:08:11, skipping insertion in model container [2021-11-25 18:08:11,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:08:10" (2/3) ... [2021-11-25 18:08:11,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b93cb87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:08:11, skipping insertion in model container [2021-11-25 18:08:11,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:08:11" (3/3) ... [2021-11-25 18:08:11,011 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2n_update_all_reverse.i [2021-11-25 18:08:11,018 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:08:11,018 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2021-11-25 18:08:11,072 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:08:11,080 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 18:08:11,081 INFO L340 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2021-11-25 18:08:11,098 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 23 states have (on average 2.260869565217391) internal successors, (52), 44 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:11,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-25 18:08:11,106 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:08:11,107 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-25 18:08:11,107 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:08:11,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:08:11,114 INFO L85 PathProgramCache]: Analyzing trace with hash 5402296, now seen corresponding path program 1 times [2021-11-25 18:08:11,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:08:11,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743523823] [2021-11-25 18:08:11,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:08:11,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:08:11,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:08:11,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:08:11,376 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:08:11,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743523823] [2021-11-25 18:08:11,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743523823] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:08:11,377 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:08:11,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:08:11,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736827004] [2021-11-25 18:08:11,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:08:11,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:08:11,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:08:11,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:08:11,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:08:11,422 INFO L87 Difference]: Start difference. First operand has 45 states, 23 states have (on average 2.260869565217391) internal successors, (52), 44 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:11,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:08:11,565 INFO L93 Difference]: Finished difference Result 76 states and 87 transitions. [2021-11-25 18:08:11,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:08:11,570 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-11-25 18:08:11,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:08:11,580 INFO L225 Difference]: With dead ends: 76 [2021-11-25 18:08:11,584 INFO L226 Difference]: Without dead ends: 73 [2021-11-25 18:08:11,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:08:11,596 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 45 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:08:11,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 59 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:08:11,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-25 18:08:11,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 41. [2021-11-25 18:08:11,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 22 states have (on average 2.090909090909091) internal successors, (46), 40 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:11,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2021-11-25 18:08:11,638 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 4 [2021-11-25 18:08:11,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:08:11,639 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2021-11-25 18:08:11,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:11,639 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2021-11-25 18:08:11,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-25 18:08:11,640 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:08:11,640 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-25 18:08:11,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:08:11,641 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:08:11,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:08:11,642 INFO L85 PathProgramCache]: Analyzing trace with hash 5402297, now seen corresponding path program 1 times [2021-11-25 18:08:11,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:08:11,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422649937] [2021-11-25 18:08:11,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:08:11,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:08:11,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:08:11,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:08:11,713 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:08:11,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422649937] [2021-11-25 18:08:11,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422649937] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:08:11,714 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:08:11,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:08:11,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87932267] [2021-11-25 18:08:11,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:08:11,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:08:11,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:08:11,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:08:11,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:08:11,717 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:11,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:08:11,875 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2021-11-25 18:08:11,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:08:11,876 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-11-25 18:08:11,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:08:11,878 INFO L225 Difference]: With dead ends: 71 [2021-11-25 18:08:11,878 INFO L226 Difference]: Without dead ends: 71 [2021-11-25 18:08:11,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:08:11,880 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 41 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:08:11,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 64 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:08:11,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-25 18:08:11,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 39. [2021-11-25 18:08:11,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 22 states have (on average 2.0) internal successors, (44), 38 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:11,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2021-11-25 18:08:11,892 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 4 [2021-11-25 18:08:11,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:08:11,892 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2021-11-25 18:08:11,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:11,893 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2021-11-25 18:08:11,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-25 18:08:11,894 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:08:11,894 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-25 18:08:11,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 18:08:11,894 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:08:11,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:08:11,895 INFO L85 PathProgramCache]: Analyzing trace with hash 172148575, now seen corresponding path program 1 times [2021-11-25 18:08:11,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:08:11,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319628888] [2021-11-25 18:08:11,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:08:11,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:08:11,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:08:11,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:08:11,930 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:08:11,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319628888] [2021-11-25 18:08:11,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319628888] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:08:11,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:08:11,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:08:11,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132326257] [2021-11-25 18:08:11,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:08:11,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:08:11,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:08:11,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:08:11,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:08:11,934 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:11,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:08:11,994 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2021-11-25 18:08:11,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:08:11,997 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-25 18:08:11,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:08:11,998 INFO L225 Difference]: With dead ends: 46 [2021-11-25 18:08:11,998 INFO L226 Difference]: Without dead ends: 46 [2021-11-25 18:08:11,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:08:12,002 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 6 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:08:12,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 56 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:08:12,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-25 18:08:12,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2021-11-25 18:08:12,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 39 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:12,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2021-11-25 18:08:12,010 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 5 [2021-11-25 18:08:12,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:08:12,011 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2021-11-25 18:08:12,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:12,011 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2021-11-25 18:08:12,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 18:08:12,012 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:08:12,012 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 18:08:12,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 18:08:12,013 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:08:12,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:08:12,018 INFO L85 PathProgramCache]: Analyzing trace with hash 896643063, now seen corresponding path program 1 times [2021-11-25 18:08:12,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:08:12,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521025128] [2021-11-25 18:08:12,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:08:12,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:08:12,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:08:12,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:08:12,132 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:08:12,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521025128] [2021-11-25 18:08:12,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521025128] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:08:12,133 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:08:12,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:08:12,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752862845] [2021-11-25 18:08:12,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:08:12,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:08:12,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:08:12,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:08:12,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:08:12,136 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:12,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:08:12,233 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2021-11-25 18:08:12,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:08:12,234 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-25 18:08:12,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:08:12,236 INFO L225 Difference]: With dead ends: 54 [2021-11-25 18:08:12,236 INFO L226 Difference]: Without dead ends: 54 [2021-11-25 18:08:12,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:08:12,238 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 78 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:08:12,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 29 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:08:12,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-25 18:08:12,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2021-11-25 18:08:12,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 38 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:12,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2021-11-25 18:08:12,249 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 6 [2021-11-25 18:08:12,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:08:12,249 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2021-11-25 18:08:12,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:12,250 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2021-11-25 18:08:12,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 18:08:12,250 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:08:12,250 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 18:08:12,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 18:08:12,251 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:08:12,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:08:12,256 INFO L85 PathProgramCache]: Analyzing trace with hash 896643064, now seen corresponding path program 1 times [2021-11-25 18:08:12,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:08:12,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898311454] [2021-11-25 18:08:12,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:08:12,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:08:12,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:08:12,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:08:12,422 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:08:12,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898311454] [2021-11-25 18:08:12,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898311454] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:08:12,423 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:08:12,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:08:12,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347499503] [2021-11-25 18:08:12,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:08:12,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:08:12,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:08:12,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:08:12,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:08:12,429 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:12,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:08:12,508 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2021-11-25 18:08:12,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:08:12,510 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-25 18:08:12,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:08:12,517 INFO L225 Difference]: With dead ends: 41 [2021-11-25 18:08:12,517 INFO L226 Difference]: Without dead ends: 41 [2021-11-25 18:08:12,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:08:12,528 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 77 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:08:12,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 20 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:08:12,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-25 18:08:12,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2021-11-25 18:08:12,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 37 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:12,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2021-11-25 18:08:12,535 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 6 [2021-11-25 18:08:12,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:08:12,535 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2021-11-25 18:08:12,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:12,535 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2021-11-25 18:08:12,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 18:08:12,536 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:08:12,536 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:08:12,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 18:08:12,537 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:08:12,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:08:12,538 INFO L85 PathProgramCache]: Analyzing trace with hash -877899620, now seen corresponding path program 1 times [2021-11-25 18:08:12,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:08:12,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464999911] [2021-11-25 18:08:12,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:08:12,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:08:12,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:08:12,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:08:12,657 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:08:12,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464999911] [2021-11-25 18:08:12,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464999911] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:08:12,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824517744] [2021-11-25 18:08:12,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:08:12,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:08:12,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:08:12,660 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:08:12,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:08:12,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:08:12,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 18:08:12,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:08:12,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:08:12,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:08:12,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:08:12,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824517744] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:08:12,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [509221262] [2021-11-25 18:08:12,961 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 18:08:12,962 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:08:12,970 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:08:12,978 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:08:12,978 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:08:13,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:13,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:13,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:08:13,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:13,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:08:13,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:08:13,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:08:13,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:13,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 18:08:13,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:13,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 18:08:13,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:13,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:13,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 18:08:13,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:13,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:08:13,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:13,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:08:13,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:13,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:13,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:13,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-25 18:08:13,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:13,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:13,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:13,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:13,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:13,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:08:13,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:13,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:13,812 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:08:13,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 290 treesize of output 272 [2021-11-25 18:08:13,873 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:08:13,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 284 treesize of output 291 [2021-11-25 18:08:13,932 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:08:13,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 278 treesize of output 285 [2021-11-25 18:08:14,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:14,255 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:08:14,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 311 treesize of output 312 [2021-11-25 18:08:14,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:14,332 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:08:14,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 292 treesize of output 293 [2021-11-25 18:08:14,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:14,404 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:08:14,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 301 treesize of output 302 [2021-11-25 18:08:14,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:14,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:14,950 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 18:08:14,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 301 treesize of output 294 [2021-11-25 18:08:14,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:14,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:14,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:14,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:14,999 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-25 18:08:15,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 383 treesize of output 368 [2021-11-25 18:08:15,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:15,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:15,051 INFO L354 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2021-11-25 18:08:15,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 379 treesize of output 372 [2021-11-25 18:08:15,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:15,286 INFO L354 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2021-11-25 18:08:15,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 380 treesize of output 383 [2021-11-25 18:08:15,681 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:08:15,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 284 treesize of output 291 [2021-11-25 18:08:15,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:15,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:15,712 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:08:15,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 284 treesize of output 266 [2021-11-25 18:08:15,774 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:08:15,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 278 treesize of output 285 [2021-11-25 18:08:15,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:16,038 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:08:16,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 311 treesize of output 312 [2021-11-25 18:08:16,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:16,106 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:08:16,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 292 treesize of output 293 [2021-11-25 18:08:16,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:16,177 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:08:16,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 301 treesize of output 302 [2021-11-25 18:08:16,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:16,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:16,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:16,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:16,696 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 18:08:16,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 305 treesize of output 290 [2021-11-25 18:08:16,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:16,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:16,749 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 18:08:16,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 301 treesize of output 294 [2021-11-25 18:08:16,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:16,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:16,793 INFO L354 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2021-11-25 18:08:16,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 379 treesize of output 372 [2021-11-25 18:08:16,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:08:17,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:08:17,012 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:08:19,828 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '614#(and (= |ULTIMATE.start_main_~s~0#1.base| |ULTIMATE.start_sll_create_#res#1.base|) (= |ULTIMATE.start_main_~new_data~0#1| |ULTIMATE.start_sll_update_at_#in~data#1|) (= |ULTIMATE.start_sll_update_at_~head#1.base| |ULTIMATE.start_sll_update_at_#in~head#1.base|) (= |ULTIMATE.start_sll_create_~head~0#1.base| |ULTIMATE.start_sll_create_#res#1.base|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (= |ULTIMATE.start_sll_update_at_~index#1| |ULTIMATE.start_sll_update_at_#in~index#1|) (= |ULTIMATE.start_sll_update_at_#in~head#1.offset| |ULTIMATE.start_main_~s~0#1.offset|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (= |ULTIMATE.start_sll_update_at_#in~head#1.base| |ULTIMATE.start_main_~s~0#1.base|) (= |ULTIMATE.start_sll_update_at_#in~head#1.offset| |ULTIMATE.start_sll_update_at_~head#1.offset|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (= |ULTIMATE.start_sll_update_at_~data#1| |ULTIMATE.start_sll_update_at_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (= (+ |ULTIMATE.start_main_~len~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~new_data~0#1|) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_sll_create_#res#1.offset| |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.offset| 0) (= |ULTIMATE.start_sll_create_#res#1.offset| |ULTIMATE.start_main_~s~0#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (= |ULTIMATE.start_main_~len~0#1| (+ |ULTIMATE.start_main_~i~0#1| 1)) (not (= (select |#valid| |ULTIMATE.start_sll_update_at_~head#1.base|) 1)) (= |ULTIMATE.start_sll_update_at_#in~index#1| |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2021-11-25 18:08:19,828 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:08:19,828 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:08:19,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2021-11-25 18:08:19,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105408555] [2021-11-25 18:08:19,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:08:19,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:08:19,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:08:19,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:08:19,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-11-25 18:08:19,831 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:19,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:08:19,891 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2021-11-25 18:08:19,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:08:19,892 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-25 18:08:19,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:08:19,893 INFO L225 Difference]: With dead ends: 43 [2021-11-25 18:08:19,893 INFO L226 Difference]: Without dead ends: 43 [2021-11-25 18:08:19,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-11-25 18:08:19,895 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 8 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:08:19,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 54 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:08:19,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-25 18:08:19,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-11-25 18:08:19,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 42 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:19,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2021-11-25 18:08:19,901 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 10 [2021-11-25 18:08:19,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:08:19,902 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2021-11-25 18:08:19,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:19,902 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2021-11-25 18:08:19,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-25 18:08:19,903 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:08:19,903 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-25 18:08:19,946 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-25 18:08:20,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:08:20,125 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:08:20,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:08:20,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1276639873, now seen corresponding path program 2 times [2021-11-25 18:08:20,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:08:20,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444899841] [2021-11-25 18:08:20,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:08:20,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:08:20,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:08:20,233 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 18:08:20,233 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:08:20,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444899841] [2021-11-25 18:08:20,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444899841] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:08:20,234 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:08:20,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 18:08:20,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745606246] [2021-11-25 18:08:20,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:08:20,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:08:20,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:08:20,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:08:20,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:08:20,237 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:20,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:08:20,417 INFO L93 Difference]: Finished difference Result 84 states and 93 transitions. [2021-11-25 18:08:20,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:08:20,418 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-25 18:08:20,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:08:20,419 INFO L225 Difference]: With dead ends: 84 [2021-11-25 18:08:20,419 INFO L226 Difference]: Without dead ends: 84 [2021-11-25 18:08:20,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-25 18:08:20,421 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 196 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:08:20,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 60 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:08:20,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-25 18:08:20,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 46. [2021-11-25 18:08:20,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 45 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:20,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2021-11-25 18:08:20,428 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 15 [2021-11-25 18:08:20,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:08:20,428 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2021-11-25 18:08:20,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:20,429 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2021-11-25 18:08:20,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-25 18:08:20,430 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:08:20,430 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-25 18:08:20,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 18:08:20,430 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:08:20,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:08:20,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1276639872, now seen corresponding path program 1 times [2021-11-25 18:08:20,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:08:20,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200118461] [2021-11-25 18:08:20,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:08:20,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:08:20,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:08:20,601 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:08:20,601 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:08:20,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200118461] [2021-11-25 18:08:20,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200118461] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:08:20,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:08:20,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 18:08:20,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453950955] [2021-11-25 18:08:20,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:08:20,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:08:20,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:08:20,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:08:20,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:08:20,603 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:20,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:08:20,805 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2021-11-25 18:08:20,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:08:20,806 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-25 18:08:20,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:08:20,807 INFO L225 Difference]: With dead ends: 70 [2021-11-25 18:08:20,807 INFO L226 Difference]: Without dead ends: 70 [2021-11-25 18:08:20,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-25 18:08:20,808 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 190 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:08:20,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 47 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:08:20,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-25 18:08:20,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 46. [2021-11-25 18:08:20,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 45 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:20,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2021-11-25 18:08:20,815 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 15 [2021-11-25 18:08:20,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:08:20,815 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2021-11-25 18:08:20,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:20,816 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2021-11-25 18:08:20,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-25 18:08:20,817 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:08:20,817 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-25 18:08:20,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 18:08:20,817 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:08:20,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:08:20,818 INFO L85 PathProgramCache]: Analyzing trace with hash -917467340, now seen corresponding path program 1 times [2021-11-25 18:08:20,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:08:20,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519872507] [2021-11-25 18:08:20,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:08:20,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:08:20,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:08:20,879 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 18:08:20,880 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:08:20,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519872507] [2021-11-25 18:08:20,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519872507] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:08:20,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:08:20,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:08:20,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521492133] [2021-11-25 18:08:20,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:08:20,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:08:20,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:08:20,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:08:20,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:08:20,883 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:20,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:08:20,930 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2021-11-25 18:08:20,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:08:20,931 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 [2021-11-25 18:08:20,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:08:20,933 INFO L225 Difference]: With dead ends: 68 [2021-11-25 18:08:20,933 INFO L226 Difference]: Without dead ends: 68 [2021-11-25 18:08:20,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:08:20,934 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 74 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:08:20,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 50 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:08:20,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-25 18:08:20,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2021-11-25 18:08:20,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 47 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:20,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2021-11-25 18:08:20,942 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 16 [2021-11-25 18:08:20,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:08:20,942 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2021-11-25 18:08:20,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:20,943 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2021-11-25 18:08:20,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-25 18:08:20,943 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:08:20,944 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-25 18:08:20,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 18:08:20,944 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:08:20,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:08:20,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1509816955, now seen corresponding path program 1 times [2021-11-25 18:08:20,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:08:20,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188107206] [2021-11-25 18:08:20,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:08:20,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:08:20,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:08:21,021 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 18:08:21,021 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:08:21,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188107206] [2021-11-25 18:08:21,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188107206] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:08:21,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:08:21,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:08:21,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929139893] [2021-11-25 18:08:21,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:08:21,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:08:21,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:08:21,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:08:21,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:08:21,024 INFO L87 Difference]: Start difference. First operand 48 states and 54 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) [2021-11-25 18:08:21,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:08:21,082 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2021-11-25 18:08:21,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:08:21,083 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 17 [2021-11-25 18:08:21,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:08:21,084 INFO L225 Difference]: With dead ends: 45 [2021-11-25 18:08:21,084 INFO L226 Difference]: Without dead ends: 45 [2021-11-25 18:08:21,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:08:21,086 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 85 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:08:21,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 31 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:08:21,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-25 18:08:21,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-11-25 18:08:21,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.5625) internal successors, (50), 44 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:21,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2021-11-25 18:08:21,091 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 17 [2021-11-25 18:08:21,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:08:21,091 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2021-11-25 18:08:21,092 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) [2021-11-25 18:08:21,092 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2021-11-25 18:08:21,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-25 18:08:21,093 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:08:21,093 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:08:21,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 18:08:21,093 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:08:21,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:08:21,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1509820527, now seen corresponding path program 1 times [2021-11-25 18:08:21,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:08:21,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663083248] [2021-11-25 18:08:21,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:08:21,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:08:21,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:08:21,318 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:08:21,319 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:08:21,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663083248] [2021-11-25 18:08:21,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663083248] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:08:21,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558722957] [2021-11-25 18:08:21,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:08:21,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:08:21,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:08:21,321 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:08:21,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:08:21,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:08:21,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-25 18:08:21,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:08:21,514 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:08:21,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-11-25 18:08:21,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:08:21,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-11-25 18:08:21,755 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:08:21,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:08:21,973 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:08:21,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558722957] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:08:21,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [478224534] [2021-11-25 18:08:21,980 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 18:08:21,980 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:08:21,981 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:08:21,981 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:08:21,982 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:08:22,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:22,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:22,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:08:22,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:22,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:08:22,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:08:22,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:08:22,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:22,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 18:08:22,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:22,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 18:08:22,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:22,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:22,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 18:08:22,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:22,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:22,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:22,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-25 18:08:22,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:22,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:08:22,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:22,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:08:22,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:22,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:22,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:22,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:22,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:22,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:08:22,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:22,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:22,411 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:08:22,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 297 treesize of output 279 [2021-11-25 18:08:22,463 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:08:22,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 291 treesize of output 298 [2021-11-25 18:08:22,520 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:08:22,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 285 treesize of output 292 [2021-11-25 18:08:22,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:22,767 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:08:22,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 318 treesize of output 319 [2021-11-25 18:08:22,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:22,852 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:08:22,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 299 treesize of output 300 [2021-11-25 18:08:22,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:22,918 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:08:22,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 308 treesize of output 309 [2021-11-25 18:08:23,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:23,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:23,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:23,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:23,440 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 18:08:23,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 305 treesize of output 290 [2021-11-25 18:08:23,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:23,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:23,486 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 18:08:23,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 301 treesize of output 294 [2021-11-25 18:08:23,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:23,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:23,548 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 18:08:23,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 313 treesize of output 306 [2021-11-25 18:08:23,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:23,776 INFO L354 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2021-11-25 18:08:23,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 380 treesize of output 383 [2021-11-25 18:08:24,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:24,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:24,074 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:08:24,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 297 treesize of output 279 [2021-11-25 18:08:24,121 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:08:24,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 291 treesize of output 298 [2021-11-25 18:08:24,170 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:08:24,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 285 treesize of output 292 [2021-11-25 18:08:24,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:24,542 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:08:24,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 576 treesize of output 577 [2021-11-25 18:08:24,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:24,620 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:08:24,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 557 treesize of output 538 [2021-11-25 18:08:24,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:24,693 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:08:24,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 562 treesize of output 563 [2021-11-25 18:08:25,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:25,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:25,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:25,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:25,294 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 18:08:25,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 301 treesize of output 286 [2021-11-25 18:08:25,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:25,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:25,340 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 18:08:25,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 297 treesize of output 290 [2021-11-25 18:08:25,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:25,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:25,383 INFO L354 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2021-11-25 18:08:25,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 369 treesize of output 362 [2021-11-25 18:08:25,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:08:25,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:08:25,687 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:08:28,382 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1321#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= |ULTIMATE.start_sll_update_at_#in~data#1| 3) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_sll_update_at_#in~head#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 1 |ULTIMATE.start_sll_update_at_#in~index#1|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= |ULTIMATE.start_sll_update_at_~data#1| 3) (<= |ULTIMATE.start_sll_update_at_~index#1| 0) (<= 3 |ULTIMATE.start_sll_update_at_~data#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_update_at_#in~head#1.offset| 0) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 3 |ULTIMATE.start_main_~new_data~0#1|) (<= 3 |ULTIMATE.start_sll_update_at_#in~data#1|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= |ULTIMATE.start_sll_update_at_#in~index#1| 1) (<= |ULTIMATE.start_main_~i~0#1| 1) (<= |ULTIMATE.start_main_~new_data~0#1| 3) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (not (= (select |#valid| |ULTIMATE.start_sll_update_at_~head#1.base|) 1)) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2021-11-25 18:08:28,382 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:08:28,382 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:08:28,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2021-11-25 18:08:28,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92893444] [2021-11-25 18:08:28,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:08:28,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-25 18:08:28,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:08:28,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-25 18:08:28,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-11-25 18:08:28,384 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:29,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:08:29,104 INFO L93 Difference]: Finished difference Result 91 states and 100 transitions. [2021-11-25 18:08:29,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 18:08:29,105 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 21 states have internal predecessors, (40), 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 17 [2021-11-25 18:08:29,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:08:29,106 INFO L225 Difference]: With dead ends: 91 [2021-11-25 18:08:29,106 INFO L226 Difference]: Without dead ends: 91 [2021-11-25 18:08:29,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=256, Invalid=1304, Unknown=0, NotChecked=0, Total=1560 [2021-11-25 18:08:29,108 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 525 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:08:29,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [525 Valid, 136 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 18:08:29,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-25 18:08:29,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 49. [2021-11-25 18:08:29,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 48 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:29,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2021-11-25 18:08:29,113 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 17 [2021-11-25 18:08:29,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:08:29,117 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2021-11-25 18:08:29,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:29,120 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2021-11-25 18:08:29,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-25 18:08:29,121 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:08:29,121 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:08:29,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 18:08:29,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:08:29,322 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:08:29,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:08:29,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1509820528, now seen corresponding path program 1 times [2021-11-25 18:08:29,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:08:29,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471699335] [2021-11-25 18:08:29,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:08:29,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:08:29,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:08:29,659 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:08:29,659 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:08:29,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471699335] [2021-11-25 18:08:29,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471699335] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:08:29,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229690100] [2021-11-25 18:08:29,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:08:29,660 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:08:29,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:08:29,666 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:08:29,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 18:08:29,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:08:29,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-25 18:08:29,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:08:29,910 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:08:29,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-11-25 18:08:29,932 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:08:29,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-25 18:08:30,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:08:30,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:08:30,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 21 [2021-11-25 18:08:30,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 14 [2021-11-25 18:08:30,262 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:08:30,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:08:30,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:30,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-25 18:08:30,619 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:08:30,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229690100] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:08:30,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1049960910] [2021-11-25 18:08:30,622 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 18:08:30,623 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:08:30,623 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:08:30,623 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:08:30,624 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:08:30,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:30,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:30,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:08:30,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:08:30,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:08:30,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:30,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:08:30,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:30,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 18:08:30,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:30,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 18:08:30,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:30,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:30,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 18:08:30,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:30,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:08:30,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:30,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:08:30,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:30,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:30,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:30,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-25 18:08:30,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:30,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:30,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:30,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:30,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:30,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:08:30,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:30,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:31,014 INFO L354 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2021-11-25 18:08:31,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 290 treesize of output 282 [2021-11-25 18:08:31,055 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:08:31,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 280 treesize of output 287 [2021-11-25 18:08:31,126 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:08:31,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 274 treesize of output 281 [2021-11-25 18:08:31,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:31,548 INFO L354 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2021-11-25 18:08:31,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 559 treesize of output 544 [2021-11-25 18:08:31,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:31,653 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:08:31,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 564 treesize of output 565 [2021-11-25 18:08:31,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:31,724 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:08:31,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 558 treesize of output 559 [2021-11-25 18:08:32,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:32,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:32,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:32,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:32,397 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 18:08:32,398 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 297 treesize of output 282 [2021-11-25 18:08:32,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:32,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:32,438 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 18:08:32,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 293 treesize of output 286 [2021-11-25 18:08:32,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:32,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:32,477 INFO L354 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2021-11-25 18:08:32,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 352 [2021-11-25 18:08:32,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:32,696 INFO L354 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2021-11-25 18:08:32,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 360 treesize of output 363 [2021-11-25 18:08:32,954 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:08:32,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 284 treesize of output 291 [2021-11-25 18:08:33,006 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:08:33,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 278 treesize of output 285 [2021-11-25 18:08:33,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:33,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:33,068 INFO L354 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2021-11-25 18:08:33,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 278 treesize of output 270 [2021-11-25 18:08:33,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:33,354 INFO L354 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2021-11-25 18:08:33,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 308 treesize of output 313 [2021-11-25 18:08:33,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:33,405 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:08:33,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 317 treesize of output 318 [2021-11-25 18:08:33,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:33,448 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:08:33,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 311 treesize of output 312 [2021-11-25 18:08:33,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:33,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:33,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:33,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:33,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:33,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:33,928 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 18:08:33,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 440 treesize of output 417 [2021-11-25 18:08:33,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:33,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:33,973 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-25 18:08:33,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 436 treesize of output 429 [2021-11-25 18:08:33,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:33,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:34,017 INFO L354 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2021-11-25 18:08:34,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 520 treesize of output 513 [2021-11-25 18:08:34,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:08:34,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:08:34,350 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:08:37,327 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1615#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (or (< (select |#length| |ULTIMATE.start_sll_update_at_~head#1.base|) (+ 4 |ULTIMATE.start_sll_update_at_~head#1.offset|)) (< |ULTIMATE.start_sll_update_at_~head#1.offset| 0)) (<= |ULTIMATE.start_sll_update_at_#in~data#1| 3) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_sll_update_at_#in~head#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 1 |ULTIMATE.start_sll_update_at_#in~index#1|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= |ULTIMATE.start_sll_update_at_~data#1| 3) (<= |ULTIMATE.start_sll_update_at_~index#1| 0) (<= 3 |ULTIMATE.start_sll_update_at_~data#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_update_at_#in~head#1.offset| 0) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 3 |ULTIMATE.start_main_~new_data~0#1|) (<= 3 |ULTIMATE.start_sll_update_at_#in~data#1|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= |ULTIMATE.start_sll_update_at_#in~index#1| 1) (<= |ULTIMATE.start_main_~i~0#1| 1) (<= |ULTIMATE.start_main_~new_data~0#1| 3) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2021-11-25 18:08:37,327 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:08:37,328 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:08:37,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 26 [2021-11-25 18:08:37,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131763287] [2021-11-25 18:08:37,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:08:37,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-25 18:08:37,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:08:37,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-25 18:08:37,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1208, Unknown=0, NotChecked=0, Total=1332 [2021-11-25 18:08:37,329 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 27 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 27 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:38,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:08:38,938 INFO L93 Difference]: Finished difference Result 101 states and 110 transitions. [2021-11-25 18:08:38,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-25 18:08:38,939 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 27 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-25 18:08:38,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:08:38,940 INFO L225 Difference]: With dead ends: 101 [2021-11-25 18:08:38,940 INFO L226 Difference]: Without dead ends: 101 [2021-11-25 18:08:38,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=382, Invalid=2068, Unknown=0, NotChecked=0, Total=2450 [2021-11-25 18:08:38,942 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1010 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1010 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:08:38,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1010 Valid, 120 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 439 Invalid, 0 Unknown, 19 Unchecked, 0.5s Time] [2021-11-25 18:08:38,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-25 18:08:38,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 47. [2021-11-25 18:08:38,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 46 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:38,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2021-11-25 18:08:38,961 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 17 [2021-11-25 18:08:38,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:08:38,961 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2021-11-25 18:08:38,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 27 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:38,962 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2021-11-25 18:08:38,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-25 18:08:38,963 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:08:38,963 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:08:39,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 18:08:39,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-25 18:08:39,164 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:08:39,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:08:39,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1752066666, now seen corresponding path program 1 times [2021-11-25 18:08:39,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:08:39,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979308965] [2021-11-25 18:08:39,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:08:39,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:08:39,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:08:39,241 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 18:08:39,242 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:08:39,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979308965] [2021-11-25 18:08:39,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979308965] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:08:39,242 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:08:39,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:08:39,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865532893] [2021-11-25 18:08:39,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:08:39,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:08:39,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:08:39,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:08:39,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:08:39,247 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:39,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:08:39,379 INFO L93 Difference]: Finished difference Result 108 states and 119 transitions. [2021-11-25 18:08:39,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:08:39,379 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-25 18:08:39,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:08:39,381 INFO L225 Difference]: With dead ends: 108 [2021-11-25 18:08:39,381 INFO L226 Difference]: Without dead ends: 108 [2021-11-25 18:08:39,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:08:39,382 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 145 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:08:39,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 46 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:08:39,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-25 18:08:39,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 50. [2021-11-25 18:08:39,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 49 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:39,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2021-11-25 18:08:39,394 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 19 [2021-11-25 18:08:39,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:08:39,395 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2021-11-25 18:08:39,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:39,395 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2021-11-25 18:08:39,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-25 18:08:39,397 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:08:39,397 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:08:39,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-25 18:08:39,398 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:08:39,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:08:39,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1752066665, now seen corresponding path program 1 times [2021-11-25 18:08:39,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:08:39,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203043304] [2021-11-25 18:08:39,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:08:39,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:08:39,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:08:39,502 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 18:08:39,502 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:08:39,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203043304] [2021-11-25 18:08:39,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203043304] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:08:39,503 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:08:39,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:08:39,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453128050] [2021-11-25 18:08:39,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:08:39,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:08:39,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:08:39,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:08:39,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:08:39,506 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:39,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:08:39,567 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2021-11-25 18:08:39,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:08:39,567 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-25 18:08:39,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:08:39,568 INFO L225 Difference]: With dead ends: 64 [2021-11-25 18:08:39,569 INFO L226 Difference]: Without dead ends: 64 [2021-11-25 18:08:39,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:08:39,570 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 60 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:08:39,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 64 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:08:39,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-25 18:08:39,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 50. [2021-11-25 18:08:39,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 38 states have (on average 1.5263157894736843) internal successors, (58), 49 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:39,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2021-11-25 18:08:39,575 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 19 [2021-11-25 18:08:39,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:08:39,575 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2021-11-25 18:08:39,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:39,576 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2021-11-25 18:08:39,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-25 18:08:39,578 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:08:39,578 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:08:39,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-25 18:08:39,579 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:08:39,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:08:39,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1486050157, now seen corresponding path program 1 times [2021-11-25 18:08:39,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:08:39,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895201601] [2021-11-25 18:08:39,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:08:39,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:08:39,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:08:39,664 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 18:08:39,664 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:08:39,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895201601] [2021-11-25 18:08:39,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895201601] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:08:39,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096201468] [2021-11-25 18:08:39,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:08:39,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:08:39,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:08:39,668 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:08:39,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 18:08:39,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:08:39,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 18:08:39,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:08:39,901 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 18:08:39,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:08:39,946 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 18:08:39,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096201468] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:08:39,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1912829237] [2021-11-25 18:08:39,950 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2021-11-25 18:08:39,950 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:08:39,950 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:08:39,951 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:08:39,951 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:08:39,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:39,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:39,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:08:40,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:08:40,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:40,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:08:40,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:08:40,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:40,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:40,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 18:08:40,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:40,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 18:08:40,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:40,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 18:08:40,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:40,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:08:40,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:40,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:08:40,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:40,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:40,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:40,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-25 18:08:40,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:40,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:40,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:40,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:40,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:40,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:08:40,369 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:08:40,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 284 treesize of output 291 [2021-11-25 18:08:40,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:40,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:40,394 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:08:40,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 284 treesize of output 266 [2021-11-25 18:08:40,445 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:08:40,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 278 treesize of output 285 [2021-11-25 18:08:40,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:40,939 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:08:40,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 974 treesize of output 969 [2021-11-25 18:08:40,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:41,024 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:08:41,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 949 treesize of output 898 [2021-11-25 18:08:41,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:41,103 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:08:41,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 946 treesize of output 941 [2021-11-25 18:08:41,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:41,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:41,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:41,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:41,928 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 18:08:41,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 414 treesize of output 391 [2021-11-25 18:08:41,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:41,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:41,972 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 18:08:41,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 410 treesize of output 403 [2021-11-25 18:08:41,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:41,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:42,014 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 18:08:42,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 428 treesize of output 421 [2021-11-25 18:08:42,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:42,227 INFO L354 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2021-11-25 18:08:42,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 360 treesize of output 363 [2021-11-25 18:08:42,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:42,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:42,461 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:08:42,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 290 treesize of output 272 [2021-11-25 18:08:42,514 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:08:42,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 284 treesize of output 291 [2021-11-25 18:08:42,562 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:08:42,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 278 treesize of output 285 [2021-11-25 18:08:42,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:42,764 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:08:42,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 311 treesize of output 312 [2021-11-25 18:08:42,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:42,816 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:08:42,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 292 treesize of output 293 [2021-11-25 18:08:42,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:42,859 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:08:42,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 301 treesize of output 302 [2021-11-25 18:08:43,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:43,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:43,180 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-25 18:08:43,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 313 treesize of output 306 [2021-11-25 18:08:43,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:43,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:43,222 INFO L354 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2021-11-25 18:08:43,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 391 treesize of output 384 [2021-11-25 18:08:43,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:43,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:43,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:43,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:43,258 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-25 18:08:43,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 431 treesize of output 416 [2021-11-25 18:08:43,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:08:43,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:08:43,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:08:43,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:08:43,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:08:43,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:08:43,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:08:43,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:08:43,942 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:08:46,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1912829237] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:08:46,395 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:08:46,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [4, 4, 4] total 18 [2021-11-25 18:08:46,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435270523] [2021-11-25 18:08:46,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:08:46,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-25 18:08:46,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:08:46,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-25 18:08:46,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-11-25 18:08:46,398 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:46,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:08:46,969 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2021-11-25 18:08:46,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-25 18:08:46,970 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-25 18:08:46,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:08:46,970 INFO L225 Difference]: With dead ends: 65 [2021-11-25 18:08:46,971 INFO L226 Difference]: Without dead ends: 65 [2021-11-25 18:08:46,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2021-11-25 18:08:46,972 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 94 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:08:46,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 77 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 18:08:46,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-25 18:08:46,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 53. [2021-11-25 18:08:46,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 52 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:46,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2021-11-25 18:08:46,976 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 21 [2021-11-25 18:08:46,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:08:46,977 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2021-11-25 18:08:46,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:46,977 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2021-11-25 18:08:46,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-25 18:08:46,978 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:08:46,978 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2021-11-25 18:08:47,019 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-25 18:08:47,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-25 18:08:47,198 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:08:47,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:08:47,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1063622353, now seen corresponding path program 1 times [2021-11-25 18:08:47,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:08:47,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395797609] [2021-11-25 18:08:47,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:08:47,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:08:47,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:08:47,277 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 18:08:47,278 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:08:47,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395797609] [2021-11-25 18:08:47,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395797609] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:08:47,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254660011] [2021-11-25 18:08:47,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:08:47,279 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:08:47,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:08:47,294 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:08:47,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 18:08:47,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:08:47,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 18:08:47,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:08:47,497 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 18:08:47,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:08:47,543 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 18:08:47,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254660011] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:08:47,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [610340713] [2021-11-25 18:08:47,548 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 18:08:47,548 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:08:47,549 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:08:47,549 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:08:47,549 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:08:47,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:47,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:47,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:08:47,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:08:47,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:47,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:08:47,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:08:47,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:47,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 18:08:47,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:47,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 18:08:47,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:47,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:47,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 18:08:47,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:47,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:08:47,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:47,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:08:47,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:47,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:47,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:47,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-25 18:08:47,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:47,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:47,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:47,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:47,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:47,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:08:47,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:47,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:47,936 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:08:47,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 290 treesize of output 272 [2021-11-25 18:08:47,977 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:08:47,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 284 treesize of output 291 [2021-11-25 18:08:48,013 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:08:48,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 278 treesize of output 285 [2021-11-25 18:08:48,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:48,335 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:08:48,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 562 treesize of output 563 [2021-11-25 18:08:48,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:48,397 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:08:48,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 543 treesize of output 524 [2021-11-25 18:08:48,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:48,464 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:08:48,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 548 treesize of output 549 [2021-11-25 18:08:48,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:48,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:48,943 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-25 18:08:48,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 301 treesize of output 294 [2021-11-25 18:08:48,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:48,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:48,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:48,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:48,982 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-25 18:08:48,982 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 371 treesize of output 356 [2021-11-25 18:08:49,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:49,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:49,026 INFO L354 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2021-11-25 18:08:49,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 367 treesize of output 360 [2021-11-25 18:08:49,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:49,179 INFO L354 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2021-11-25 18:08:49,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 386 treesize of output 389 [2021-11-25 18:08:49,461 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:08:49,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 284 treesize of output 291 [2021-11-25 18:08:49,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:49,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:49,488 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:08:49,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 284 treesize of output 266 [2021-11-25 18:08:49,539 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:08:49,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 278 treesize of output 285 [2021-11-25 18:08:49,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:49,944 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:08:49,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 961 treesize of output 910 [2021-11-25 18:08:49,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:50,019 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:08:50,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 958 treesize of output 953 [2021-11-25 18:08:50,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:50,075 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:08:50,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 946 treesize of output 941 [2021-11-25 18:08:50,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:50,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:50,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:50,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:50,642 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 18:08:50,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 418 treesize of output 395 [2021-11-25 18:08:50,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:50,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:50,695 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-25 18:08:50,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 414 treesize of output 407 [2021-11-25 18:08:50,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:50,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:50,739 INFO L354 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2021-11-25 18:08:50,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 444 treesize of output 437 [2021-11-25 18:08:50,895 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:08:50,898 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:08:50,901 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:08:51,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:08:51,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:08:51,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:08:51,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:08:51,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:08:51,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:08:51,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:08:51,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:08:51,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:08:51,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:08:51,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:08:51,402 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:08:53,634 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2483#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= |ULTIMATE.start_sll_update_at_#in~data#1| 3) (<= 0 |ULTIMATE.start_sll_update_at_#in~head#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= |ULTIMATE.start_sll_update_at_~data#1| 3) (<= |ULTIMATE.start_sll_update_at_~index#1| 0) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_update_at_#in~head#1.offset| 0) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= |ULTIMATE.start_sll_update_at_#in~index#1| 1) (<= |ULTIMATE.start_main_~i~0#1| 1) (<= |ULTIMATE.start_main_~new_data~0#1| 3) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (not (= (select |#valid| |ULTIMATE.start_sll_update_at_~head#1.base|) 1)) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2021-11-25 18:08:53,634 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:08:53,634 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:08:53,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2021-11-25 18:08:53,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859725549] [2021-11-25 18:08:53,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:08:53,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 18:08:53,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:08:53,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 18:08:53,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-11-25 18:08:53,636 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:53,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:08:53,721 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2021-11-25 18:08:53,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:08:53,721 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-25 18:08:53,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:08:53,722 INFO L225 Difference]: With dead ends: 60 [2021-11-25 18:08:53,722 INFO L226 Difference]: Without dead ends: 60 [2021-11-25 18:08:53,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-11-25 18:08:53,724 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 154 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:08:53,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 45 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:08:53,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-25 18:08:53,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 49. [2021-11-25 18:08:53,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 38 states have (on average 1.4736842105263157) internal successors, (56), 48 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:53,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2021-11-25 18:08:53,727 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 22 [2021-11-25 18:08:53,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:08:53,728 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2021-11-25 18:08:53,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:53,728 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2021-11-25 18:08:53,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-25 18:08:53,729 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:08:53,729 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:08:53,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 18:08:53,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-25 18:08:53,946 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:08:53,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:08:53,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1051784735, now seen corresponding path program 1 times [2021-11-25 18:08:53,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:08:53,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906383765] [2021-11-25 18:08:53,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:08:53,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:08:53,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:08:54,071 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 18:08:54,071 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:08:54,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906383765] [2021-11-25 18:08:54,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906383765] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:08:54,072 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:08:54,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 18:08:54,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051306416] [2021-11-25 18:08:54,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:08:54,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:08:54,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:08:54,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:08:54,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:08:54,075 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 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) [2021-11-25 18:08:54,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:08:54,219 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2021-11-25 18:08:54,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:08:54,220 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 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) Word has length 24 [2021-11-25 18:08:54,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:08:54,221 INFO L225 Difference]: With dead ends: 65 [2021-11-25 18:08:54,221 INFO L226 Difference]: Without dead ends: 65 [2021-11-25 18:08:54,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-25 18:08:54,222 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 150 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:08:54,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 41 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:08:54,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-25 18:08:54,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 49. [2021-11-25 18:08:54,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 38 states have (on average 1.4210526315789473) internal successors, (54), 48 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:54,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2021-11-25 18:08:54,225 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 24 [2021-11-25 18:08:54,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:08:54,226 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2021-11-25 18:08:54,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 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) [2021-11-25 18:08:54,226 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2021-11-25 18:08:54,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-25 18:08:54,227 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:08:54,227 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:08:54,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-25 18:08:54,228 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:08:54,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:08:54,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1447748933, now seen corresponding path program 1 times [2021-11-25 18:08:54,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:08:54,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586696600] [2021-11-25 18:08:54,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:08:54,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:08:54,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:08:54,568 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:08:54,568 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:08:54,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586696600] [2021-11-25 18:08:54,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586696600] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:08:54,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251089516] [2021-11-25 18:08:54,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:08:54,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:08:54,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:08:54,574 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:08:54,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 18:08:54,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:08:54,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-25 18:08:54,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:08:54,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:08:54,787 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:08:54,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-25 18:08:54,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:08:54,983 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:08:54,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 35 [2021-11-25 18:08:55,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:55,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 26 [2021-11-25 18:08:55,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2021-11-25 18:08:55,161 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:08:55,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:08:58,220 INFO L354 Elim1Store]: treesize reduction 5, result has 70.6 percent of original size [2021-11-25 18:08:58,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 18:08:58,225 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_836 (Array Int Int))) (= |c_ULTIMATE.start_sll_update_at_~head#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_836) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)))) is different from false [2021-11-25 18:08:58,234 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_836 (Array Int Int))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) (+ 4 |c_ULTIMATE.start_sll_update_at_~head#1.offset|)))) (= .cse0 (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_836) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))))) is different from false [2021-11-25 18:08:58,243 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_836 (Array Int Int))) (let ((.cse1 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) .cse1))) (= .cse0 (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_836) |c_ULTIMATE.start_main_~s~0#1.base|) .cse1))))) is different from false [2021-11-25 18:08:58,249 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_836 (Array Int Int))) (let ((.cse1 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse1))) (= (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_836) |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse1) .cse0)))) is different from false [2021-11-25 18:08:58,255 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:08:58,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2021-11-25 18:08:58,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2021-11-25 18:08:58,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:08:58,339 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 7 not checked. [2021-11-25 18:08:58,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251089516] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:08:58,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1152007390] [2021-11-25 18:08:58,342 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 18:08:58,342 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:08:58,342 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:08:58,343 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:08:58,343 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:08:58,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:58,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:58,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:08:58,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:08:58,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:08:58,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:58,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:08:58,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:58,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 18:08:58,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:58,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 18:08:58,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:58,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:58,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 18:08:58,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:58,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:58,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:58,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-25 18:08:58,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:58,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:08:58,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:58,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:08:58,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:58,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:58,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:58,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:58,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:58,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:08:58,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:58,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:58,709 INFO L354 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2021-11-25 18:08:58,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 290 treesize of output 282 [2021-11-25 18:08:58,748 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:08:58,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 280 treesize of output 287 [2021-11-25 18:08:58,794 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:08:58,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 274 treesize of output 281 [2021-11-25 18:08:59,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:59,075 INFO L354 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2021-11-25 18:08:59,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 308 treesize of output 313 [2021-11-25 18:08:59,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:59,128 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:08:59,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 317 treesize of output 318 [2021-11-25 18:08:59,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:59,175 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:08:59,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 311 treesize of output 312 [2021-11-25 18:08:59,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:59,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:59,677 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 18:08:59,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 414 treesize of output 407 [2021-11-25 18:08:59,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:59,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:59,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:59,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:59,718 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-25 18:08:59,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 496 treesize of output 473 [2021-11-25 18:08:59,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:59,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:59,763 INFO L354 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2021-11-25 18:08:59,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 492 treesize of output 485 [2021-11-25 18:08:59,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:59,988 INFO L354 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2021-11-25 18:08:59,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 370 treesize of output 373 [2021-11-25 18:09:00,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:00,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:00,288 INFO L354 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2021-11-25 18:09:00,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 290 treesize of output 282 [2021-11-25 18:09:00,345 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:09:00,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 280 treesize of output 287 [2021-11-25 18:09:00,396 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:09:00,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 274 treesize of output 281 [2021-11-25 18:09:00,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:00,885 INFO L354 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2021-11-25 18:09:00,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 570 treesize of output 559 [2021-11-25 18:09:00,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:00,956 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:09:00,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 579 treesize of output 574 [2021-11-25 18:09:00,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:01,024 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:09:01,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 567 treesize of output 562 [2021-11-25 18:09:01,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:01,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:01,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:01,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:01,623 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 18:09:01,624 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 424 treesize of output 401 [2021-11-25 18:09:01,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:01,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:01,667 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 18:09:01,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 420 treesize of output 413 [2021-11-25 18:09:01,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:01,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:01,709 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 18:09:01,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 438 treesize of output 431 [2021-11-25 18:09:01,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:09:02,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:09:02,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:09:02,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:09:02,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:09:02,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:09:02,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:09:02,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:09:02,499 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:09:05,719 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2921#(and (<= |ULTIMATE.start_sll_get_data_at_~index#1| 0) (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 0 |ULTIMATE.start_sll_get_data_at_~index#1|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 1 |ULTIMATE.start_sll_get_data_at_#in~index#1|) (<= |ULTIMATE.start_main_~expected~0#1| 3) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 0 |ULTIMATE.start_sll_get_data_at_#in~head#1.offset|) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (not (= (select |#valid| |ULTIMATE.start_sll_get_data_at_~head#1.base|) 1)) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 3 |ULTIMATE.start_main_~expected~0#1|) (<= |ULTIMATE.start_main_~i~0#1| 1) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= |ULTIMATE.start_sll_get_data_at_#in~index#1| 1) (<= |ULTIMATE.start_sll_get_data_at_#in~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2021-11-25 18:09:05,719 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:09:05,719 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:09:05,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 35 [2021-11-25 18:09:05,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41270747] [2021-11-25 18:09:05,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:09:05,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-25 18:09:05,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:09:05,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-25 18:09:05,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1893, Unknown=4, NotChecked=364, Total=2450 [2021-11-25 18:09:05,722 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 36 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 36 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:09:06,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:09:06,960 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2021-11-25 18:09:06,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-25 18:09:06,961 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 36 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-25 18:09:06,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:09:06,962 INFO L225 Difference]: With dead ends: 86 [2021-11-25 18:09:06,962 INFO L226 Difference]: Without dead ends: 86 [2021-11-25 18:09:06,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=433, Invalid=3361, Unknown=4, NotChecked=492, Total=4290 [2021-11-25 18:09:06,964 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 348 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 1167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 326 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:09:06,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 316 Invalid, 1167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 793 Invalid, 0 Unknown, 326 Unchecked, 0.5s Time] [2021-11-25 18:09:06,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-25 18:09:06,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 52. [2021-11-25 18:09:06,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 41 states have (on average 1.4634146341463414) internal successors, (60), 51 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:09:06,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2021-11-25 18:09:06,967 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 26 [2021-11-25 18:09:06,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:09:06,968 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2021-11-25 18:09:06,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 36 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:09:06,968 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2021-11-25 18:09:06,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-25 18:09:06,969 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:09:06,969 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:09:07,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 18:09:07,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-25 18:09:07,194 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:09:07,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:09:07,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1447748932, now seen corresponding path program 1 times [2021-11-25 18:09:07,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:09:07,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144567159] [2021-11-25 18:09:07,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:09:07,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:09:07,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:09:07,574 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:09:07,575 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:09:07,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144567159] [2021-11-25 18:09:07,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144567159] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:09:07,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374314386] [2021-11-25 18:09:07,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:09:07,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:09:07,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:09:07,576 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:09:07,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 18:09:07,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:09:07,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-25 18:09:07,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:09:07,802 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:09:07,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-25 18:09:07,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:09:07,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:09:08,031 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:09:08,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 53 [2021-11-25 18:09:08,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 41 [2021-11-25 18:09:08,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:08,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 34 [2021-11-25 18:09:08,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:08,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 33 [2021-11-25 18:09:08,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 21 [2021-11-25 18:09:08,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 14 [2021-11-25 18:09:08,298 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:09:08,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:09:09,228 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_55| Int)) (or (and (forall ((v_ArrVal_950 Int) (v_ArrVal_952 Int)) (let ((.cse0 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (<= (+ (select (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_55| v_ArrVal_950) .cse0) 4) (select |c_#length| (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_55| v_ArrVal_952) .cse0))))) (forall ((v_ArrVal_950 Int)) (<= 0 (select (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_55| v_ArrVal_950) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_55|))) is different from false [2021-11-25 18:09:09,255 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:09:09,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 59 [2021-11-25 18:09:09,383 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_55| Int)) (or (and (forall ((v_ArrVal_950 Int) (v_ArrVal_947 (Array Int Int))) (<= (select (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_947) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_55| v_ArrVal_950) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) |c_ULTIMATE.start_sll_update_at_~head#1.offset|)) (forall ((v_ArrVal_948 (Array Int Int)) (v_ArrVal_952 Int)) (= |c_ULTIMATE.start_sll_update_at_~head#1.base| (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_948) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_55| v_ArrVal_952) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)))) (forall ((v_prenex_2 Int) (v_ArrVal_947 (Array Int Int))) (<= 0 (select (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_947) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_55| v_prenex_2) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_55|))) is different from false [2021-11-25 18:09:09,504 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_55| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_55|) (and (forall ((v_ArrVal_948 (Array Int Int)) (v_ArrVal_952 Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) (+ 4 |c_ULTIMATE.start_sll_update_at_~head#1.offset|)))) (= .cse0 (select (store (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_948) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_55| v_ArrVal_952) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))))) (forall ((v_ArrVal_950 Int) (v_ArrVal_947 (Array Int Int))) (let ((.cse1 (+ 4 |c_ULTIMATE.start_sll_update_at_~head#1.offset|))) (<= (select (store (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) .cse1) v_ArrVal_947) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_55| v_ArrVal_950) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base|) .cse1)))) (forall ((v_prenex_2 Int) (v_ArrVal_947 (Array Int Int))) (<= 0 (select (store (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) (+ 4 |c_ULTIMATE.start_sll_update_at_~head#1.offset|)) v_ArrVal_947) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_55| v_prenex_2) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))))))) is different from false [2021-11-25 18:09:09,608 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_55| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_55|) (and (forall ((v_prenex_2 Int) (v_ArrVal_947 (Array Int Int))) (<= 0 (let ((.cse0 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (select (store (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) .cse0) v_ArrVal_947) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_55| v_prenex_2) .cse0)))) (forall ((v_ArrVal_950 Int) (v_ArrVal_947 (Array Int Int))) (let ((.cse1 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (<= (select (store (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) .cse1) v_ArrVal_947) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_55| v_ArrVal_950) .cse1) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) .cse1)))) (forall ((v_ArrVal_948 (Array Int Int)) (v_ArrVal_952 Int)) (let ((.cse3 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (let ((.cse2 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) .cse3))) (= .cse2 (select (store (select (store |c_#memory_$Pointer$.base| .cse2 v_ArrVal_948) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_55| v_ArrVal_952) .cse3)))))))) is different from false [2021-11-25 18:09:09,662 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_55| Int)) (or (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_55|) (and (forall ((v_ArrVal_950 Int) (v_ArrVal_947 (Array Int Int))) (let ((.cse0 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4))) (<= (select (store (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse0) v_ArrVal_947) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_55| v_ArrVal_950) .cse0) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse0)))) (forall ((v_prenex_2 Int) (v_ArrVal_947 (Array Int Int))) (<= 0 (let ((.cse1 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4))) (select (store (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse1) v_ArrVal_947) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_55| v_prenex_2) .cse1)))) (forall ((v_ArrVal_948 (Array Int Int)) (v_ArrVal_952 Int)) (let ((.cse3 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4))) (let ((.cse2 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse3))) (= (select (store (select (store |c_#memory_$Pointer$.base| .cse2 v_ArrVal_948) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_55| v_ArrVal_952) .cse3) .cse2))))))) is different from false [2021-11-25 18:09:09,685 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:09:09,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 67 [2021-11-25 18:09:09,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 95 [2021-11-25 18:09:09,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:09,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 77 [2021-11-25 18:09:09,705 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:09:09,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 77 [2021-11-25 18:09:09,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 90 [2021-11-25 18:09:09,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:09,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 79 [2021-11-25 18:09:09,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:09,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2021-11-25 18:09:09,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:09,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 40 [2021-11-25 18:09:09,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:09,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-25 18:09:09,850 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 18:09:09,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2021-11-25 18:09:09,865 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2021-11-25 18:09:09,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374314386] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:09:09,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [620851325] [2021-11-25 18:09:09,868 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 18:09:09,868 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:09:09,869 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:09:09,869 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:09:09,869 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:09:09,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:09,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:09,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:09:09,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:09,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:09:09,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:09:09,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:09:10,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:10,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 18:09:10,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:10,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 18:09:10,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:10,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:10,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 18:09:10,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:10,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:09:10,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:10,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:09:10,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:10,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:10,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:10,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-25 18:09:10,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:10,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:10,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:10,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:10,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:10,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:09:10,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:10,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:10,270 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:09:10,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 290 treesize of output 272 [2021-11-25 18:09:10,318 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:09:10,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 284 treesize of output 291 [2021-11-25 18:09:10,368 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:09:10,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 278 treesize of output 285 [2021-11-25 18:09:10,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:10,797 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:09:10,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 974 treesize of output 969 [2021-11-25 18:09:10,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:10,852 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:09:10,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 949 treesize of output 898 [2021-11-25 18:09:10,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:10,906 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:09:10,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 946 treesize of output 941 [2021-11-25 18:09:11,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:11,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:11,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:11,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:11,568 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 18:09:11,569 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 293 treesize of output 278 [2021-11-25 18:09:11,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:11,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:11,597 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 18:09:11,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 289 treesize of output 282 [2021-11-25 18:09:11,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:11,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:11,624 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 18:09:11,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 301 treesize of output 294 [2021-11-25 18:09:11,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:11,777 INFO L354 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2021-11-25 18:09:11,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 350 treesize of output 353 [2021-11-25 18:09:11,972 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:09:11,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 284 treesize of output 291 [2021-11-25 18:09:11,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:11,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:11,991 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:09:11,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 284 treesize of output 266 [2021-11-25 18:09:12,032 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:09:12,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 278 treesize of output 285 [2021-11-25 18:09:12,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:12,189 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:09:12,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 311 treesize of output 312 [2021-11-25 18:09:12,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:12,231 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:09:12,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 305 treesize of output 306 [2021-11-25 18:09:12,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:12,273 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:09:12,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 286 treesize of output 287 [2021-11-25 18:09:12,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:12,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:12,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:12,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:12,605 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 18:09:12,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 305 treesize of output 290 [2021-11-25 18:09:12,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:12,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:12,665 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 18:09:12,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 301 treesize of output 294 [2021-11-25 18:09:12,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:12,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:12,700 INFO L354 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2021-11-25 18:09:12,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 379 treesize of output 372 [2021-11-25 18:09:12,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:09:12,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:09:12,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:09:13,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:09:13,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:09:13,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:09:13,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:09:13,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:09:13,395 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:09:17,059 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3297#(and (<= |ULTIMATE.start_sll_get_data_at_~index#1| 0) (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 0 |ULTIMATE.start_sll_get_data_at_~index#1|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 1 |ULTIMATE.start_sll_get_data_at_#in~index#1|) (<= |ULTIMATE.start_main_~expected~0#1| 3) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 0 |ULTIMATE.start_sll_get_data_at_#in~head#1.offset|) (<= |ULTIMATE.start_sll_create_~data#1| 1) (or (< (select |#length| |ULTIMATE.start_sll_get_data_at_~head#1.base|) (+ |ULTIMATE.start_sll_get_data_at_~head#1.offset| 4)) (< |ULTIMATE.start_sll_get_data_at_~head#1.offset| 0)) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 3 |ULTIMATE.start_main_~expected~0#1|) (<= |ULTIMATE.start_main_~i~0#1| 1) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= |ULTIMATE.start_sll_get_data_at_#in~index#1| 1) (<= |ULTIMATE.start_sll_get_data_at_#in~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2021-11-25 18:09:17,059 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:09:17,059 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:09:17,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 15] total 37 [2021-11-25 18:09:17,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221377071] [2021-11-25 18:09:17,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:09:17,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-25 18:09:17,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:09:17,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-25 18:09:17,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1985, Unknown=5, NotChecked=470, Total=2652 [2021-11-25 18:09:17,062 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 38 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:09:19,295 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_55| Int)) (or (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_55|) (and (forall ((v_ArrVal_950 Int) (v_ArrVal_947 (Array Int Int))) (let ((.cse0 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4))) (<= (select (store (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse0) v_ArrVal_947) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_55| v_ArrVal_950) .cse0) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse0)))) (forall ((v_prenex_2 Int) (v_ArrVal_947 (Array Int Int))) (<= 0 (let ((.cse1 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4))) (select (store (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse1) v_ArrVal_947) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_55| v_prenex_2) .cse1)))) (forall ((v_ArrVal_948 (Array Int Int)) (v_ArrVal_952 Int)) (let ((.cse3 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4))) (let ((.cse2 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse3))) (= (select (store (select (store |c_#memory_$Pointer$.base| .cse2 v_ArrVal_948) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_55| v_ArrVal_952) .cse3) .cse2))))))) (= (select |c_#valid| |c_ULTIMATE.start_node_create_~temp~0#1.base|) 1) (= (select |c_#valid| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 1) (= |c_ULTIMATE.start_node_create_~temp~0#1.offset| 0) (= |c_ULTIMATE.start_sll_create_~head~0#1.offset| 0) (= |c_ULTIMATE.start_sll_create_~new_head~0#1.offset| 0) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4) 0) (= (select |c_#valid| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) 1) (not (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4) |c_ULTIMATE.start_sll_create_~head~0#1.base|))) is different from false [2021-11-25 18:09:21,300 WARN L838 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_main_~s~0#1.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) 4))) (= 0 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) 4)) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_55| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_55|) (and (forall ((v_prenex_2 Int) (v_ArrVal_947 (Array Int Int))) (<= 0 (let ((.cse0 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (select (store (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) .cse0) v_ArrVal_947) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_55| v_prenex_2) .cse0)))) (forall ((v_ArrVal_950 Int) (v_ArrVal_947 (Array Int Int))) (let ((.cse1 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (<= (select (store (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) .cse1) v_ArrVal_947) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_55| v_ArrVal_950) .cse1) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) .cse1)))) (forall ((v_ArrVal_948 (Array Int Int)) (v_ArrVal_952 Int)) (let ((.cse3 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (let ((.cse2 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) .cse3))) (= .cse2 (select (store (select (store |c_#memory_$Pointer$.base| .cse2 v_ArrVal_948) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_55| v_ArrVal_952) .cse3)))))))) (= |c_ULTIMATE.start_main_~s~0#1.offset| 0)) is different from false [2021-11-25 18:09:23,330 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|)) (.cse1 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|)) (.cse3 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) (.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) (+ 4 |c_ULTIMATE.start_sll_update_at_~head#1.offset|)))) (and (= .cse0 (select .cse1 4)) (<= 0 (select .cse2 .cse3)) (= 0 (select .cse2 4)) (not (= (select .cse1 .cse3) |c_ULTIMATE.start_main_~s~0#1.base|)) (not (= .cse0 |c_ULTIMATE.start_main_~s~0#1.base|)) (= |c_ULTIMATE.start_sll_update_at_~head#1.offset| 0) (= |c_ULTIMATE.start_main_~s~0#1.offset| |c_ULTIMATE.start_sll_update_at_~head#1.offset|) (= |c_ULTIMATE.start_sll_update_at_~head#1.base| |c_ULTIMATE.start_main_~s~0#1.base|) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_55| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_55|) (and (forall ((v_ArrVal_948 (Array Int Int)) (v_ArrVal_952 Int)) (let ((.cse4 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) (+ 4 |c_ULTIMATE.start_sll_update_at_~head#1.offset|)))) (= .cse4 (select (store (select (store |c_#memory_$Pointer$.base| .cse4 v_ArrVal_948) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_55| v_ArrVal_952) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))))) (forall ((v_ArrVal_950 Int) (v_ArrVal_947 (Array Int Int))) (let ((.cse5 (+ 4 |c_ULTIMATE.start_sll_update_at_~head#1.offset|))) (<= (select (store (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) .cse5) v_ArrVal_947) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_55| v_ArrVal_950) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base|) .cse5)))) (forall ((v_prenex_2 Int) (v_ArrVal_947 (Array Int Int))) (<= 0 (select (store (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) (+ 4 |c_ULTIMATE.start_sll_update_at_~head#1.offset|)) v_ArrVal_947) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_55| v_prenex_2) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))))))) (= |c_ULTIMATE.start_main_~s~0#1.offset| 0))) is different from false [2021-11-25 18:09:25,340 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|)) (.cse3 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|)) (.cse4 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (let ((.cse0 (select .cse3 .cse4)) (.cse1 (select .cse2 .cse4))) (and (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_55| Int)) (or (and (forall ((v_ArrVal_950 Int) (v_ArrVal_947 (Array Int Int))) (<= (select (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_947) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_55| v_ArrVal_950) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) |c_ULTIMATE.start_sll_update_at_~head#1.offset|)) (forall ((v_ArrVal_948 (Array Int Int)) (v_ArrVal_952 Int)) (= |c_ULTIMATE.start_sll_update_at_~head#1.base| (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_948) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_55| v_ArrVal_952) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)))) (forall ((v_prenex_2 Int) (v_ArrVal_947 (Array Int Int))) (<= 0 (select (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_947) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_55| v_prenex_2) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_55|))) (not (= |c_ULTIMATE.start_sll_update_at_~head#1.base| |c_ULTIMATE.start_main_~s~0#1.base|)) (= |c_ULTIMATE.start_sll_update_at_~head#1.base| .cse0) (<= 0 .cse1) (= 0 (select .cse2 4)) (not (= .cse0 |c_ULTIMATE.start_main_~s~0#1.base|)) (= |c_ULTIMATE.start_sll_update_at_~head#1.base| (select .cse3 4)) (<= .cse1 |c_ULTIMATE.start_sll_update_at_~head#1.offset|) (= |c_ULTIMATE.start_main_~s~0#1.offset| 0)))) is different from false [2021-11-25 18:09:26,019 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse3 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|)) (.cse1 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|)) (.cse5 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (let ((.cse0 (select .cse1 .cse5)) (.cse2 (select .cse3 .cse5))) (and (<= 0 .cse0) (= 0 (select .cse1 4)) (not (= .cse2 |c_ULTIMATE.start_main_~s~0#1.base|)) (<= 4 (select |c_#length| (select .cse3 4))) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_55| Int)) (or (and (forall ((v_ArrVal_950 Int) (v_ArrVal_952 Int)) (let ((.cse4 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (<= (+ (select (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_55| v_ArrVal_950) .cse4) 4) (select |c_#length| (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_55| v_ArrVal_952) .cse4))))) (forall ((v_ArrVal_950 Int)) (<= 0 (select (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_55| v_ArrVal_950) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_55|))) (<= (+ 4 .cse0) (select |c_#length| .cse2)) (= |c_ULTIMATE.start_main_~s~0#1.offset| 0)))) is different from false [2021-11-25 18:09:26,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:09:26,660 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2021-11-25 18:09:26,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-25 18:09:26,661 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 38 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-25 18:09:26,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:09:26,662 INFO L225 Difference]: With dead ends: 90 [2021-11-25 18:09:26,662 INFO L226 Difference]: Without dead ends: 90 [2021-11-25 18:09:26,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 10 IntricatePredicates, 0 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=352, Invalid=2984, Unknown=10, NotChecked=1210, Total=4556 [2021-11-25 18:09:26,665 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 324 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 1105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 534 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:09:26,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 337 Invalid, 1105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 547 Invalid, 0 Unknown, 534 Unchecked, 0.3s Time] [2021-11-25 18:09:26,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-25 18:09:26,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 51. [2021-11-25 18:09:26,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 40 states have (on average 1.45) internal successors, (58), 50 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:09:26,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2021-11-25 18:09:26,669 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 26 [2021-11-25 18:09:26,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:09:26,669 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2021-11-25 18:09:26,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 38 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:09:26,670 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2021-11-25 18:09:26,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-25 18:09:26,670 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:09:26,671 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:09:26,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 18:09:26,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:09:26,898 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:09:26,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:09:26,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1447751388, now seen corresponding path program 1 times [2021-11-25 18:09:26,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:09:26,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101028047] [2021-11-25 18:09:26,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:09:26,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:09:26,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:09:26,973 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 18:09:26,973 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:09:26,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101028047] [2021-11-25 18:09:26,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101028047] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:09:26,974 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:09:26,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:09:26,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553401482] [2021-11-25 18:09:26,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:09:26,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:09:26,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:09:26,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:09:26,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:09:26,976 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:09:27,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:09:27,041 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2021-11-25 18:09:27,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:09:27,042 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-25 18:09:27,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:09:27,043 INFO L225 Difference]: With dead ends: 43 [2021-11-25 18:09:27,043 INFO L226 Difference]: Without dead ends: 43 [2021-11-25 18:09:27,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:09:27,045 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 61 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:09:27,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 27 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:09:27,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-25 18:09:27,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-11-25 18:09:27,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 42 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:09:27,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-11-25 18:09:27,053 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 26 [2021-11-25 18:09:27,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:09:27,054 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-11-25 18:09:27,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:09:27,054 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-11-25 18:09:27,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-25 18:09:27,055 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:09:27,055 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:09:27,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-25 18:09:27,056 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:09:27,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:09:27,056 INFO L85 PathProgramCache]: Analyzing trace with hash 282739415, now seen corresponding path program 1 times [2021-11-25 18:09:27,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:09:27,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311474752] [2021-11-25 18:09:27,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:09:27,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:09:27,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:09:27,670 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:09:27,670 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:09:27,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311474752] [2021-11-25 18:09:27,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311474752] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:09:27,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115331911] [2021-11-25 18:09:27,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:09:27,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:09:27,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:09:27,673 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:09:27,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 18:09:27,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:09:27,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 90 conjunts are in the unsatisfiable core [2021-11-25 18:09:27,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:09:27,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:09:27,910 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:09:27,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-25 18:09:27,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:09:27,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:09:28,142 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:09:28,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 65 [2021-11-25 18:09:28,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 23 [2021-11-25 18:09:28,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2021-11-25 18:09:28,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:28,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 38 [2021-11-25 18:09:28,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-11-25 18:09:28,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:28,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 34 [2021-11-25 18:09:28,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 47 [2021-11-25 18:09:28,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 31 [2021-11-25 18:09:28,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2021-11-25 18:09:28,668 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:09:28,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:09:28,943 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1118 (Array Int Int)) (v_ArrVal_1121 Int) (v_ArrVal_1120 Int)) (<= (* 2 |c_ULTIMATE.start_main_~len~0#1|) (+ (let ((.cse0 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (select (select (store |c_#memory_int| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1118) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) |c_ULTIMATE.start_sll_update_at_~head#1.offset| v_ArrVal_1121)) |c_ULTIMATE.start_main_~s~0#1.base|) .cse0)) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base|) |c_ULTIMATE.start_sll_update_at_~head#1.offset| v_ArrVal_1120)) |c_ULTIMATE.start_main_~s~0#1.base|) .cse0))) 1))) (forall ((v_ArrVal_1118 (Array Int Int)) (v_ArrVal_1121 Int) (v_ArrVal_1120 Int)) (<= (+ (let ((.cse1 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (select (select (store |c_#memory_int| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1118) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) |c_ULTIMATE.start_sll_update_at_~head#1.offset| v_ArrVal_1121)) |c_ULTIMATE.start_main_~s~0#1.base|) .cse1)) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base|) |c_ULTIMATE.start_sll_update_at_~head#1.offset| v_ArrVal_1120)) |c_ULTIMATE.start_main_~s~0#1.base|) .cse1))) 1) (* 2 |c_ULTIMATE.start_main_~len~0#1|)))) is different from false [2021-11-25 18:09:29,015 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_65| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_65|) (and (forall ((v_ArrVal_1118 (Array Int Int)) (v_ArrVal_1121 Int) (v_ArrVal_1120 Int)) (<= (+ (let ((.cse0 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~s~0#1.base| v_ArrVal_1118) (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_65| v_ArrVal_1121) .cse0)) (select (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_65| v_ArrVal_1120) .cse0))) 1) (* 2 |c_ULTIMATE.start_main_~len~0#1|))) (forall ((v_ArrVal_1118 (Array Int Int)) (v_ArrVal_1121 Int) (v_ArrVal_1120 Int)) (<= (* 2 |c_ULTIMATE.start_main_~len~0#1|) (+ (let ((.cse1 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~s~0#1.base| v_ArrVal_1118) (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_65| v_ArrVal_1121) .cse1)) (select (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_65| v_ArrVal_1120) .cse1))) 1)))))) is different from false [2021-11-25 18:09:29,034 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:09:29,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 86 [2021-11-25 18:09:29,068 INFO L354 Elim1Store]: treesize reduction 90, result has 30.8 percent of original size [2021-11-25 18:09:29,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 190 treesize of output 169 [2021-11-25 18:09:29,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 111 [2021-11-25 18:09:29,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 97 [2021-11-25 18:09:29,259 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_65| Int)) (or (let ((.cse1 (* 2 |c_ULTIMATE.start_main_~len~0#1|)) (.cse0 (+ |c_ULTIMATE.start_sll_update_at_~data#1| 1))) (and (<= .cse0 .cse1) (forall ((v_ArrVal_1114 (Array Int Int)) (v_prenex_8 Int)) (not (= (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1114) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_65| v_prenex_8) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) |c_ULTIMATE.start_main_~s~0#1.base|))) (forall ((v_ArrVal_1114 (Array Int Int)) (v_prenex_8 Int)) (= |c_ULTIMATE.start_sll_update_at_~head#1.base| (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1114) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_65| v_prenex_8) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)))) (forall ((v_ArrVal_1116 (Array Int Int)) (v_prenex_9 Int)) (= (select (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1116) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_65| v_prenex_9) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) |c_ULTIMATE.start_sll_update_at_~head#1.offset|)) (<= .cse1 .cse0))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_65|))) is different from false [2021-11-25 18:09:29,385 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_65| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_65|) (let ((.cse1 (* 2 |c_ULTIMATE.start_main_~len~0#1|)) (.cse0 (+ |c_ULTIMATE.start_sll_update_at_~data#1| 1))) (and (<= .cse0 .cse1) (forall ((v_ArrVal_1114 (Array Int Int)) (v_prenex_8 Int)) (not (= (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) (+ 4 |c_ULTIMATE.start_sll_update_at_~head#1.offset|)) v_ArrVal_1114) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_65| v_prenex_8) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) |c_ULTIMATE.start_main_~s~0#1.base|))) (<= .cse1 .cse0) (forall ((v_ArrVal_1116 (Array Int Int)) (v_prenex_9 Int)) (let ((.cse2 (+ 4 |c_ULTIMATE.start_sll_update_at_~head#1.offset|))) (= (select (store (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) .cse2) v_ArrVal_1116) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_65| v_prenex_9) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base|) .cse2)))) (forall ((v_ArrVal_1114 (Array Int Int)) (v_prenex_8 Int)) (let ((.cse3 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) (+ 4 |c_ULTIMATE.start_sll_update_at_~head#1.offset|)))) (= (select (store (select (store |c_#memory_$Pointer$.base| .cse3 v_ArrVal_1114) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_65| v_prenex_8) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) .cse3))))))) is different from false [2021-11-25 18:09:29,529 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_65| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_65|) (let ((.cse0 (+ |c_ULTIMATE.start_main_~i~0#1| 1))) (and (<= |c_ULTIMATE.start_main_~len~0#1| .cse0) (<= .cse0 |c_ULTIMATE.start_main_~len~0#1|) (forall ((v_ArrVal_1114 (Array Int Int)) (v_prenex_8 Int)) (let ((.cse2 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) .cse2))) (= (select (store (select (store |c_#memory_$Pointer$.base| .cse1 v_ArrVal_1114) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_65| v_prenex_8) .cse2) .cse1)))) (forall ((v_ArrVal_1114 (Array Int Int)) (v_prenex_8 Int)) (not (= (let ((.cse3 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) .cse3) v_ArrVal_1114) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_65| v_prenex_8) .cse3)) |c_ULTIMATE.start_main_~s~0#1.base|))) (forall ((v_ArrVal_1116 (Array Int Int)) (v_prenex_9 Int)) (let ((.cse4 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (= (select (store (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) .cse4) v_ArrVal_1116) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_65| v_prenex_9) .cse4) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) .cse4)))))))) is different from false [2021-11-25 18:09:29,581 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_65| Int)) (or (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_65|) (and (forall ((v_ArrVal_1116 (Array Int Int)) (v_prenex_9 Int)) (let ((.cse0 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4))) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse0) (select (store (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse0) v_ArrVal_1116) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_65| v_prenex_9) .cse0)))) (forall ((v_ArrVal_1114 (Array Int Int)) (v_prenex_8 Int)) (not (= (let ((.cse1 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4))) (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse1) v_ArrVal_1114) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_65| v_prenex_8) .cse1)) |c_ULTIMATE.start_sll_create_~head~0#1.base|))) (forall ((v_ArrVal_1114 (Array Int Int)) (v_prenex_8 Int)) (let ((.cse3 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4))) (let ((.cse2 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse3))) (= (select (store (select (store |c_#memory_$Pointer$.base| .cse2 v_ArrVal_1114) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_65| v_prenex_8) .cse3) .cse2))))))) is different from false [2021-11-25 18:09:29,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:29,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 71 [2021-11-25 18:09:29,607 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:09:29,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 58 [2021-11-25 18:09:29,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 86 [2021-11-25 18:09:29,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:29,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 68 [2021-11-25 18:09:29,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:29,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 40 [2021-11-25 18:09:29,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:29,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-25 18:09:29,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:29,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-25 18:09:29,762 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2021-11-25 18:09:29,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115331911] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:09:29,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [175842166] [2021-11-25 18:09:29,765 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-25 18:09:29,765 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:09:29,765 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:09:29,766 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:09:29,766 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:09:29,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:29,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:29,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:09:29,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:29,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:09:29,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:09:29,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:09:29,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:29,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 18:09:29,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:29,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:29,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 18:09:29,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:29,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 18:09:29,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:29,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:09:29,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:29,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:29,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:29,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-25 18:09:29,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:29,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:09:30,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:30,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:30,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:30,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:30,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:30,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:09:30,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:30,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:30,148 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:09:30,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 290 treesize of output 272 [2021-11-25 18:09:30,197 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:09:30,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 284 treesize of output 291 [2021-11-25 18:09:30,250 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:09:30,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 278 treesize of output 285 [2021-11-25 18:09:30,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:30,476 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:09:30,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 311 treesize of output 312 [2021-11-25 18:09:30,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:30,538 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:09:30,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 292 treesize of output 293 [2021-11-25 18:09:30,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:30,599 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:09:30,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 301 treesize of output 302 [2021-11-25 18:09:31,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:31,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:31,051 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-25 18:09:31,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 313 treesize of output 306 [2021-11-25 18:09:31,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:31,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:31,091 INFO L354 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2021-11-25 18:09:31,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 349 treesize of output 342 [2021-11-25 18:09:31,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:31,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:31,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:31,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:31,117 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-25 18:09:31,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 431 treesize of output 416 [2021-11-25 18:09:31,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:31,259 INFO L354 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2021-11-25 18:09:31,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 416 treesize of output 419 [2021-11-25 18:09:31,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:31,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:31,507 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:09:31,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 290 treesize of output 272 [2021-11-25 18:09:31,563 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:09:31,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 284 treesize of output 291 [2021-11-25 18:09:31,601 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:09:31,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 278 treesize of output 285 [2021-11-25 18:09:31,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:31,986 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:09:31,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 974 treesize of output 969 [2021-11-25 18:09:32,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:32,060 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:09:32,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 949 treesize of output 898 [2021-11-25 18:09:32,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:32,141 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:09:32,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 946 treesize of output 941 [2021-11-25 18:09:32,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:32,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:32,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:32,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:32,927 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 18:09:32,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 418 treesize of output 395 [2021-11-25 18:09:32,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:32,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:32,976 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-25 18:09:32,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 414 treesize of output 407 [2021-11-25 18:09:32,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:32,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:33,012 INFO L354 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2021-11-25 18:09:33,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 444 treesize of output 437 [2021-11-25 18:09:33,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:09:33,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:09:33,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:09:33,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:09:33,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:09:33,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:09:33,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:09:33,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:09:33,758 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:09:37,580 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3788#(and (<= (+ |ULTIMATE.start_sll_get_data_at_~head#1.offset| 4) (select |#length| |ULTIMATE.start_sll_get_data_at_~head#1.base|)) (<= |ULTIMATE.start_sll_get_data_at_~index#1| 0) (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (= (select (select |#memory_int| |ULTIMATE.start_sll_get_data_at_~head#1.base|) |ULTIMATE.start_sll_get_data_at_~head#1.offset|) |ULTIMATE.start_sll_get_data_at_#res#1|) (not (= |ULTIMATE.start_sll_get_data_at_#res#1| |ULTIMATE.start_main_~expected~0#1|)) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (= (select |#valid| |ULTIMATE.start_sll_get_data_at_~head#1.base|) 1) (<= 0 |ULTIMATE.start_sll_get_data_at_~index#1|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 1 |ULTIMATE.start_sll_get_data_at_#in~index#1|) (<= |ULTIMATE.start_main_~expected~0#1| 3) (<= 0 |ULTIMATE.start_sll_get_data_at_~head#1.offset|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 0 |ULTIMATE.start_sll_get_data_at_#in~head#1.offset|) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= |ULTIMATE.start_sll_get_data_at_#res#1| 2147483647) (<= 3 |ULTIMATE.start_main_~expected~0#1|) (<= |ULTIMATE.start_main_~i~0#1| 1) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= |ULTIMATE.start_sll_get_data_at_#in~index#1| 1) (<= |ULTIMATE.start_sll_get_data_at_#in~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_sll_get_data_at_#res#1| 2147483648)))' at error location [2021-11-25 18:09:37,580 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:09:37,580 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:09:37,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 18] total 44 [2021-11-25 18:09:37,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819253661] [2021-11-25 18:09:37,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:09:37,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-25 18:09:37,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:09:37,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-25 18:09:37,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=2557, Unknown=6, NotChecked=642, Total=3422 [2021-11-25 18:09:37,584 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 44 states, 44 states have (on average 1.6590909090909092) internal successors, (73), 44 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:09:39,832 WARN L838 $PredicateComparison]: unable to prove that (and (= (select |c_#valid| |c_ULTIMATE.start_node_create_~temp~0#1.base|) 1) (= (select |c_#valid| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 1) (= |c_ULTIMATE.start_node_create_~temp~0#1.offset| 0) (= |c_ULTIMATE.start_sll_create_~head~0#1.offset| 0) (= (select |c_#valid| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) 1) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_65| Int)) (or (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_65|) (and (forall ((v_ArrVal_1116 (Array Int Int)) (v_prenex_9 Int)) (let ((.cse0 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4))) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse0) (select (store (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse0) v_ArrVal_1116) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_65| v_prenex_9) .cse0)))) (forall ((v_ArrVal_1114 (Array Int Int)) (v_prenex_8 Int)) (not (= (let ((.cse1 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4))) (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse1) v_ArrVal_1114) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_65| v_prenex_8) .cse1)) |c_ULTIMATE.start_sll_create_~head~0#1.base|))) (forall ((v_ArrVal_1114 (Array Int Int)) (v_prenex_8 Int)) (let ((.cse3 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4))) (let ((.cse2 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse3))) (= (select (store (select (store |c_#memory_$Pointer$.base| .cse2 v_ArrVal_1114) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_65| v_prenex_8) .cse3) .cse2))))))) (not (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4) |c_ULTIMATE.start_sll_create_~head~0#1.base|))) is different from false [2021-11-25 18:09:41,835 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse5 (+ |c_ULTIMATE.start_main_~i~0#1| 1))) (and (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_65| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_65|) (let ((.cse0 (+ |c_ULTIMATE.start_main_~i~0#1| 1))) (and (<= |c_ULTIMATE.start_main_~len~0#1| .cse0) (<= .cse0 |c_ULTIMATE.start_main_~len~0#1|) (forall ((v_ArrVal_1114 (Array Int Int)) (v_prenex_8 Int)) (let ((.cse2 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) .cse2))) (= (select (store (select (store |c_#memory_$Pointer$.base| .cse1 v_ArrVal_1114) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_65| v_prenex_8) .cse2) .cse1)))) (forall ((v_ArrVal_1114 (Array Int Int)) (v_prenex_8 Int)) (not (= (let ((.cse3 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) .cse3) v_ArrVal_1114) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_65| v_prenex_8) .cse3)) |c_ULTIMATE.start_main_~s~0#1.base|))) (forall ((v_ArrVal_1116 (Array Int Int)) (v_prenex_9 Int)) (let ((.cse4 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (= (select (store (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) .cse4) v_ArrVal_1116) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_65| v_prenex_9) .cse4) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) .cse4)))))))) (<= |c_ULTIMATE.start_main_~len~0#1| .cse5) (not (= |c_ULTIMATE.start_main_~s~0#1.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) 4))) (<= .cse5 |c_ULTIMATE.start_main_~len~0#1|) (= |c_ULTIMATE.start_main_~s~0#1.offset| 0))) is different from false [2021-11-25 18:09:43,867 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 4 |c_ULTIMATE.start_sll_update_at_~head#1.offset|))) (let ((.cse3 (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (.cse2 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|)) (.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) .cse0))) (and (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base|) .cse0) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) 4)) (= .cse1 (select .cse2 4)) (<= |c_ULTIMATE.start_main_~len~0#1| .cse3) (= (* 2 |c_ULTIMATE.start_main_~len~0#1|) (+ |c_ULTIMATE.start_sll_update_at_~data#1| 1)) (<= .cse3 |c_ULTIMATE.start_main_~len~0#1|) (not (= (select .cse2 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) |c_ULTIMATE.start_main_~s~0#1.base|)) (not (= .cse1 |c_ULTIMATE.start_main_~s~0#1.base|)) (= |c_ULTIMATE.start_sll_update_at_~data#1| (+ |c_ULTIMATE.start_main_~len~0#1| |c_ULTIMATE.start_main_~i~0#1|)) (= |c_ULTIMATE.start_sll_update_at_~head#1.offset| 0) (= |c_ULTIMATE.start_main_~s~0#1.offset| |c_ULTIMATE.start_sll_update_at_~head#1.offset|) (= |c_ULTIMATE.start_sll_update_at_~head#1.base| |c_ULTIMATE.start_main_~s~0#1.base|) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_65| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_65|) (let ((.cse5 (* 2 |c_ULTIMATE.start_main_~len~0#1|)) (.cse4 (+ |c_ULTIMATE.start_sll_update_at_~data#1| 1))) (and (<= .cse4 .cse5) (forall ((v_ArrVal_1114 (Array Int Int)) (v_prenex_8 Int)) (not (= (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) (+ 4 |c_ULTIMATE.start_sll_update_at_~head#1.offset|)) v_ArrVal_1114) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_65| v_prenex_8) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) |c_ULTIMATE.start_main_~s~0#1.base|))) (<= .cse5 .cse4) (forall ((v_ArrVal_1116 (Array Int Int)) (v_prenex_9 Int)) (let ((.cse6 (+ 4 |c_ULTIMATE.start_sll_update_at_~head#1.offset|))) (= (select (store (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) .cse6) v_ArrVal_1116) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_65| v_prenex_9) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base|) .cse6)))) (forall ((v_ArrVal_1114 (Array Int Int)) (v_prenex_8 Int)) (let ((.cse7 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) (+ 4 |c_ULTIMATE.start_sll_update_at_~head#1.offset|)))) (= (select (store (select (store |c_#memory_$Pointer$.base| .cse7 v_ArrVal_1114) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_65| v_prenex_8) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) .cse7))))))) (= |c_ULTIMATE.start_main_~s~0#1.offset| 0)))) is different from false [2021-11-25 18:09:45,876 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_main_~i~0#1| 1))) (and (= |c_ULTIMATE.start_sll_update_at_~head#1.offset| (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) 4)) (<= |c_ULTIMATE.start_main_~len~0#1| .cse0) (not (= |c_ULTIMATE.start_sll_update_at_~head#1.base| |c_ULTIMATE.start_main_~s~0#1.base|)) (<= .cse0 |c_ULTIMATE.start_main_~len~0#1|) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_65| Int)) (or (let ((.cse2 (* 2 |c_ULTIMATE.start_main_~len~0#1|)) (.cse1 (+ |c_ULTIMATE.start_sll_update_at_~data#1| 1))) (and (<= .cse1 .cse2) (forall ((v_ArrVal_1114 (Array Int Int)) (v_prenex_8 Int)) (not (= (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1114) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_65| v_prenex_8) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) |c_ULTIMATE.start_main_~s~0#1.base|))) (forall ((v_ArrVal_1114 (Array Int Int)) (v_prenex_8 Int)) (= |c_ULTIMATE.start_sll_update_at_~head#1.base| (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1114) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_65| v_prenex_8) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)))) (forall ((v_ArrVal_1116 (Array Int Int)) (v_prenex_9 Int)) (= (select (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1116) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_65| v_prenex_9) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) |c_ULTIMATE.start_sll_update_at_~head#1.offset|)) (<= .cse2 .cse1))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_65|))) (= |c_ULTIMATE.start_sll_update_at_~data#1| (+ |c_ULTIMATE.start_main_~len~0#1| |c_ULTIMATE.start_main_~i~0#1|)) (= |c_ULTIMATE.start_sll_update_at_~head#1.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) 4)) (= |c_ULTIMATE.start_main_~s~0#1.offset| 0))) is different from false [2021-11-25 18:09:45,924 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) 4))) (let ((.cse1 (+ (select (select |c_#memory_int| .cse2) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) 4)) 1)) (.cse0 (* 2 |c_ULTIMATE.start_main_~len~0#1|))) (and (<= .cse0 .cse1) (not (= |c_ULTIMATE.start_main_~s~0#1.base| .cse2)) (<= .cse1 .cse0) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_65| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_65|) (and (forall ((v_ArrVal_1118 (Array Int Int)) (v_ArrVal_1121 Int) (v_ArrVal_1120 Int)) (<= (+ (let ((.cse3 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~s~0#1.base| v_ArrVal_1118) (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_65| v_ArrVal_1121) .cse3)) (select (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_65| v_ArrVal_1120) .cse3))) 1) (* 2 |c_ULTIMATE.start_main_~len~0#1|))) (forall ((v_ArrVal_1118 (Array Int Int)) (v_ArrVal_1121 Int) (v_ArrVal_1120 Int)) (<= (* 2 |c_ULTIMATE.start_main_~len~0#1|) (+ (let ((.cse4 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~s~0#1.base| v_ArrVal_1118) (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_65| v_ArrVal_1121) .cse4)) (select (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_65| v_ArrVal_1120) .cse4))) 1)))))) (= |c_ULTIMATE.start_main_~s~0#1.offset| 0)))) is different from false [2021-11-25 18:09:46,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:09:46,617 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2021-11-25 18:09:46,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-25 18:09:46,617 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.6590909090909092) internal successors, (73), 44 states have internal predecessors, (73), 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 28 [2021-11-25 18:09:46,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:09:46,618 INFO L225 Difference]: With dead ends: 66 [2021-11-25 18:09:46,618 INFO L226 Difference]: Without dead ends: 66 [2021-11-25 18:09:46,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 11 IntricatePredicates, 1 DeprecatedPredicates, 1109 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=392, Invalid=3931, Unknown=11, NotChecked=1518, Total=5852 [2021-11-25 18:09:46,620 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 173 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 256 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:09:46,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 333 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 501 Invalid, 0 Unknown, 256 Unchecked, 0.3s Time] [2021-11-25 18:09:46,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-25 18:09:46,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 47. [2021-11-25 18:09:46,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 40 states have (on average 1.275) internal successors, (51), 46 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:09:46,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-11-25 18:09:46,624 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 28 [2021-11-25 18:09:46,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:09:46,624 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-11-25 18:09:46,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.6590909090909092) internal successors, (73), 44 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:09:46,624 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-11-25 18:09:46,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-25 18:09:46,625 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:09:46,625 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:09:46,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 18:09:46,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:09:46,829 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:09:46,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:09:46,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1131037742, now seen corresponding path program 1 times [2021-11-25 18:09:46,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:09:46,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077246461] [2021-11-25 18:09:46,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:09:46,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:09:46,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:09:46,920 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 18:09:46,920 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:09:46,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077246461] [2021-11-25 18:09:46,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077246461] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:09:46,921 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:09:46,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 18:09:46,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752581292] [2021-11-25 18:09:46,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:09:46,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:09:46,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:09:46,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:09:46,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:09:46,923 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:09:47,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:09:47,035 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2021-11-25 18:09:47,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:09:47,036 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-25 18:09:47,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:09:47,036 INFO L225 Difference]: With dead ends: 56 [2021-11-25 18:09:47,036 INFO L226 Difference]: Without dead ends: 56 [2021-11-25 18:09:47,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-25 18:09:47,037 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 153 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:09:47,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 22 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:09:47,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-25 18:09:47,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 48. [2021-11-25 18:09:47,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 47 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:09:47,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2021-11-25 18:09:47,041 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 30 [2021-11-25 18:09:47,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:09:47,041 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2021-11-25 18:09:47,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:09:47,041 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2021-11-25 18:09:47,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-25 18:09:47,044 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:09:47,044 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:09:47,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-25 18:09:47,045 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:09:47,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:09:47,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1131036516, now seen corresponding path program 1 times [2021-11-25 18:09:47,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:09:47,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497416496] [2021-11-25 18:09:47,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:09:47,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:09:47,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:09:47,151 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 18:09:47,151 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:09:47,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497416496] [2021-11-25 18:09:47,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497416496] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:09:47,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663682296] [2021-11-25 18:09:47,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:09:47,152 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:09:47,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:09:47,158 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:09:47,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 18:09:47,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:09:47,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 18:09:47,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:09:47,397 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 18:09:47,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:09:47,455 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 18:09:47,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663682296] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:09:47,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [584898238] [2021-11-25 18:09:47,460 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-25 18:09:47,461 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:09:47,461 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:09:47,461 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:09:47,462 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:09:47,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:47,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:47,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:09:47,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:09:47,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:09:47,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:47,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:09:47,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:47,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:47,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 18:09:47,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:47,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 18:09:47,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:47,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 18:09:47,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:47,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:47,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:47,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-25 18:09:47,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:47,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:09:47,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:47,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:09:47,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:47,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:47,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:47,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:47,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:47,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:09:47,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:47,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:47,854 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:09:47,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 290 treesize of output 272 [2021-11-25 18:09:47,906 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:09:47,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 284 treesize of output 291 [2021-11-25 18:09:47,951 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:09:47,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 278 treesize of output 285 [2021-11-25 18:09:48,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:48,190 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:09:48,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 562 treesize of output 563 [2021-11-25 18:09:48,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:48,253 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:09:48,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 543 treesize of output 524 [2021-11-25 18:09:48,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:48,317 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:09:48,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 548 treesize of output 549 [2021-11-25 18:09:48,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:48,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:48,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:48,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:48,719 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 18:09:48,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 418 treesize of output 395 [2021-11-25 18:09:48,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:48,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:48,761 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 18:09:48,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 414 treesize of output 407 [2021-11-25 18:09:48,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:48,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:48,801 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 18:09:48,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 432 treesize of output 425 [2021-11-25 18:09:48,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:49,014 INFO L354 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2021-11-25 18:09:49,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 370 treesize of output 373 [2021-11-25 18:09:49,270 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:09:49,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 284 treesize of output 291 [2021-11-25 18:09:49,315 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:09:49,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 278 treesize of output 285 [2021-11-25 18:09:49,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:49,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:49,334 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:09:49,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 278 treesize of output 260 [2021-11-25 18:09:49,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:49,501 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:09:49,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 311 treesize of output 312 [2021-11-25 18:09:49,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:49,544 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:09:49,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 305 treesize of output 306 [2021-11-25 18:09:49,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:49,586 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:09:49,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 286 treesize of output 287 [2021-11-25 18:09:49,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:49,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:49,919 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-25 18:09:49,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 313 treesize of output 306 [2021-11-25 18:09:49,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:49,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:49,963 INFO L354 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2021-11-25 18:09:49,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 391 treesize of output 384 [2021-11-25 18:09:49,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:49,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:49,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:49,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:49,999 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-25 18:09:50,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 431 treesize of output 416 [2021-11-25 18:09:50,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:09:50,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:09:50,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:09:50,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:09:50,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:09:50,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:09:51,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:09:51,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:09:51,503 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:09:54,566 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4256#(and (= |ULTIMATE.start_sll_destroy_#in~head#1.offset| |ULTIMATE.start_main_~s~0#1.offset|) (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (< |ULTIMATE.start_main_~i~0#1| 0) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (not (= |ULTIMATE.start_sll_destroy_~head#1.base| 0)) (= |ULTIMATE.start_sll_destroy_~head#1.base| |ULTIMATE.start_sll_destroy_#in~head#1.base|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (not (= (select |#valid| |ULTIMATE.start_sll_destroy_~head#1.base|) 1)) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (= |ULTIMATE.start_sll_destroy_#in~head#1.base| |ULTIMATE.start_main_~s~0#1.base|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |ULTIMATE.start_sll_destroy_#in~head#1.offset| |ULTIMATE.start_sll_destroy_~head#1.offset|) (= |#NULL.base| 0))' at error location [2021-11-25 18:09:54,567 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:09:54,567 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:09:54,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-11-25 18:09:54,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53123424] [2021-11-25 18:09:54,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:09:54,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 18:09:54,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:09:54,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 18:09:54,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-11-25 18:09:54,569 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:09:54,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:09:54,758 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2021-11-25 18:09:54,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-25 18:09:54,758 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-25 18:09:54,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:09:54,759 INFO L225 Difference]: With dead ends: 55 [2021-11-25 18:09:54,759 INFO L226 Difference]: Without dead ends: 55 [2021-11-25 18:09:54,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=180, Invalid=942, Unknown=0, NotChecked=0, Total=1122 [2021-11-25 18:09:54,761 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:09:54,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 35 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:09:54,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-25 18:09:54,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2021-11-25 18:09:54,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 43 states have (on average 1.255813953488372) internal successors, (54), 48 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:09:54,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2021-11-25 18:09:54,764 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 30 [2021-11-25 18:09:54,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:09:54,765 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2021-11-25 18:09:54,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:09:54,765 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2021-11-25 18:09:54,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-25 18:09:54,766 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:09:54,766 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:09:54,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 18:09:54,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:09:54,987 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:09:54,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:09:54,988 INFO L85 PathProgramCache]: Analyzing trace with hash 224119269, now seen corresponding path program 1 times [2021-11-25 18:09:54,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:09:54,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558666213] [2021-11-25 18:09:54,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:09:54,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:09:55,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:09:55,195 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 18:09:55,195 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:09:55,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558666213] [2021-11-25 18:09:55,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558666213] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:09:55,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221914678] [2021-11-25 18:09:55,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:09:55,196 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:09:55,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:09:55,202 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:09:55,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 18:09:55,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:09:55,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-25 18:09:55,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:09:55,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-25 18:09:55,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-25 18:09:55,720 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 18:09:55,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:09:55,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-11-25 18:09:55,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:55,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:55,977 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 18:09:55,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221914678] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:09:55,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [603418830] [2021-11-25 18:09:55,980 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-25 18:09:55,981 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:09:55,981 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:09:55,981 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:09:55,982 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:09:56,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:56,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:56,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:09:56,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:09:56,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:09:56,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:56,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:09:56,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:56,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 18:09:56,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:56,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 18:09:56,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:56,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:56,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 18:09:56,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:56,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:09:56,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:56,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:09:56,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:56,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:56,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:56,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-25 18:09:56,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:56,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:56,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:56,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:56,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:56,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:09:56,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:56,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:56,405 INFO L354 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2021-11-25 18:09:56,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 297 treesize of output 289 [2021-11-25 18:09:56,445 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:09:56,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 287 treesize of output 294 [2021-11-25 18:09:56,489 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:09:56,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 281 treesize of output 288 [2021-11-25 18:09:56,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:56,699 INFO L354 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2021-11-25 18:09:56,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 315 treesize of output 320 [2021-11-25 18:09:56,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:56,743 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:09:56,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 324 treesize of output 325 [2021-11-25 18:09:56,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:56,812 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:09:56,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 318 treesize of output 319 [2021-11-25 18:09:57,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:57,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:57,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:57,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:57,367 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 18:09:57,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 418 treesize of output 395 [2021-11-25 18:09:57,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:57,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:57,408 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 18:09:57,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 414 treesize of output 407 [2021-11-25 18:09:57,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:57,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:57,448 INFO L354 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2021-11-25 18:09:57,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 492 treesize of output 485 [2021-11-25 18:09:57,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:57,617 INFO L354 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2021-11-25 18:09:57,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 370 treesize of output 373 [2021-11-25 18:09:57,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:57,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:57,898 INFO L354 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2021-11-25 18:09:57,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 297 treesize of output 289 [2021-11-25 18:09:57,953 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:09:57,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 287 treesize of output 294 [2021-11-25 18:09:58,005 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:09:58,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 281 treesize of output 288 [2021-11-25 18:09:58,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:58,287 INFO L354 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2021-11-25 18:09:58,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 315 treesize of output 320 [2021-11-25 18:09:58,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:58,378 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:09:58,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 324 treesize of output 325 [2021-11-25 18:09:58,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:58,439 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:09:58,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 318 treesize of output 319 [2021-11-25 18:09:58,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:58,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:58,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:58,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:09:58,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:58,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:58,983 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 18:09:58,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 447 treesize of output 424 [2021-11-25 18:09:59,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:59,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:59,016 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-25 18:09:59,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 443 treesize of output 436 [2021-11-25 18:09:59,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:59,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:09:59,048 INFO L354 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2021-11-25 18:09:59,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 503 treesize of output 496 [2021-11-25 18:09:59,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:09:59,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:09:59,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:09:59,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:09:59,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:09:59,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:10:00,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:10:00,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:10:00,506 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:10:03,637 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4606#(and (<= |ULTIMATE.start_sll_get_data_at_~index#1| 0) (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= |ULTIMATE.start_main_~expected~0#1| 3) (<= 0 |ULTIMATE.start_sll_get_data_at_~head#1.offset|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 0 |ULTIMATE.start_sll_get_data_at_#in~head#1.offset|) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= |ULTIMATE.start_sll_get_data_at_#res#1| 2147483647) (<= |ULTIMATE.start_main_~i~0#1| 1) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= |ULTIMATE.start_sll_get_data_at_#in~index#1| 1) (<= |ULTIMATE.start_sll_get_data_at_#in~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_sll_get_data_at_#res#1| 2147483648)))' at error location [2021-11-25 18:10:03,637 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:10:03,638 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:10:03,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2021-11-25 18:10:03,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733088883] [2021-11-25 18:10:03,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:10:03,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-25 18:10:03,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:10:03,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-25 18:10:03,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1234, Unknown=0, NotChecked=0, Total=1406 [2021-11-25 18:10:03,640 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 24 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:10:04,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:10:04,024 INFO L93 Difference]: Finished difference Result 67 states and 74 transitions. [2021-11-25 18:10:04,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 18:10:04,024 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 24 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-25 18:10:04,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:10:04,025 INFO L225 Difference]: With dead ends: 67 [2021-11-25 18:10:04,025 INFO L226 Difference]: Without dead ends: 67 [2021-11-25 18:10:04,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=265, Invalid=1627, Unknown=0, NotChecked=0, Total=1892 [2021-11-25 18:10:04,026 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 200 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:10:04,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 136 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:10:04,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-25 18:10:04,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 51. [2021-11-25 18:10:04,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 50 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:10:04,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2021-11-25 18:10:04,030 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 32 [2021-11-25 18:10:04,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:10:04,030 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2021-11-25 18:10:04,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 24 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:10:04,031 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2021-11-25 18:10:04,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-25 18:10:04,031 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:10:04,031 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:10:04,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 18:10:04,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-25 18:10:04,246 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:10:04,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:10:04,247 INFO L85 PathProgramCache]: Analyzing trace with hash 631651059, now seen corresponding path program 1 times [2021-11-25 18:10:04,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:10:04,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078881337] [2021-11-25 18:10:04,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:10:04,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:10:04,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:10:04,389 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 18:10:04,389 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:10:04,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078881337] [2021-11-25 18:10:04,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078881337] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:10:04,390 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:10:04,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 18:10:04,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185368340] [2021-11-25 18:10:04,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:10:04,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:10:04,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:10:04,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:10:04,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:10:04,392 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:10:04,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:10:04,516 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2021-11-25 18:10:04,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:10:04,517 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-25 18:10:04,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:10:04,517 INFO L225 Difference]: With dead ends: 55 [2021-11-25 18:10:04,518 INFO L226 Difference]: Without dead ends: 55 [2021-11-25 18:10:04,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-25 18:10:04,518 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 126 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:10:04,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 13 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:10:04,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-25 18:10:04,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2021-11-25 18:10:04,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 51 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:10:04,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2021-11-25 18:10:04,523 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 34 [2021-11-25 18:10:04,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:10:04,524 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2021-11-25 18:10:04,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:10:04,524 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2021-11-25 18:10:04,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-25 18:10:04,525 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:10:04,525 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:10:04,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-25 18:10:04,526 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:10:04,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:10:04,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1630475224, now seen corresponding path program 2 times [2021-11-25 18:10:04,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:10:04,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693535897] [2021-11-25 18:10:04,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:10:04,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:10:04,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:10:04,598 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 18:10:04,598 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:10:04,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693535897] [2021-11-25 18:10:04,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693535897] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:10:04,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195803925] [2021-11-25 18:10:04,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:10:04,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:10:04,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:10:04,606 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:10:04,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 18:10:04,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-25 18:10:04,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:10:04,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 18:10:04,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:10:04,898 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 18:10:04,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:10:04,972 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 18:10:04,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195803925] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:10:04,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [573661616] [2021-11-25 18:10:04,976 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-25 18:10:04,976 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:10:04,977 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:10:04,977 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:10:04,977 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:10:05,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:05,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:05,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:10:05,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:05,043 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 34 treesize of output 21 [2021-11-25 18:10:05,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:10:05,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:10:05,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:05,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 18:10:05,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:05,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 18:10:05,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:05,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:05,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 18:10:05,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:05,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:05,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:05,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-25 18:10:05,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:10:05,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:10:05,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:10:05,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:10:05,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:05,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:05,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:05,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:05,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:05,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:10:05,322 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:10:05,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 284 treesize of output 291 [2021-11-25 18:10:05,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:05,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:05,341 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:10:05,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 284 treesize of output 266 [2021-11-25 18:10:05,379 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:10:05,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 278 treesize of output 285 [2021-11-25 18:10:05,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:05,573 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:10:05,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 311 treesize of output 312 [2021-11-25 18:10:05,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:10:05,632 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:10:05,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 292 treesize of output 293 [2021-11-25 18:10:05,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:05,691 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:10:05,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 301 treesize of output 302 [2021-11-25 18:10:06,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:10:06,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:10:06,030 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 18:10:06,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 301 treesize of output 294 [2021-11-25 18:10:06,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:10:06,054 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-25 18:10:06,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 383 treesize of output 368 [2021-11-25 18:10:06,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:10:06,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:10:06,082 INFO L354 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2021-11-25 18:10:06,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 379 treesize of output 372 [2021-11-25 18:10:06,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,246 INFO L354 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2021-11-25 18:10:06,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 380 treesize of output 383 [2021-11-25 18:10:06,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,459 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:10:06,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 290 treesize of output 272 [2021-11-25 18:10:06,495 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:10:06,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 284 treesize of output 291 [2021-11-25 18:10:06,528 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:10:06,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 278 treesize of output 285 [2021-11-25 18:10:06,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:10:06,847 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:10:06,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 961 treesize of output 910 [2021-11-25 18:10:06,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,896 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:10:06,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 958 treesize of output 953 [2021-11-25 18:10:06,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:06,945 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:10:06,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 946 treesize of output 941 [2021-11-25 18:10:07,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:10:07,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:10:07,451 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-25 18:10:07,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 414 treesize of output 407 [2021-11-25 18:10:07,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:07,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:07,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:07,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:10:07,477 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-25 18:10:07,478 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 490 treesize of output 467 [2021-11-25 18:10:07,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:10:07,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:10:07,507 INFO L354 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2021-11-25 18:10:07,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 486 treesize of output 479 [2021-11-25 18:10:07,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:10:07,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:10:07,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:10:07,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:10:07,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:10:07,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:10:08,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:10:08,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:10:08,975 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:10:11,684 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5079#(and (<= |ULTIMATE.start_sll_get_data_at_~index#1| 0) (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= |ULTIMATE.start_main_~expected~0#1| 3) (<= 0 |ULTIMATE.start_sll_get_data_at_~head#1.offset|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 0 |ULTIMATE.start_sll_get_data_at_#in~head#1.offset|) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= |ULTIMATE.start_sll_get_data_at_#res#1| 2147483647) (<= |ULTIMATE.start_main_~i~0#1| 1) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= |ULTIMATE.start_sll_get_data_at_#in~index#1| 1) (<= |ULTIMATE.start_sll_get_data_at_#in~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_sll_get_data_at_#res#1| 2147483648)))' at error location [2021-11-25 18:10:11,684 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:10:11,684 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:10:11,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2021-11-25 18:10:11,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517992590] [2021-11-25 18:10:11,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:10:11,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 18:10:11,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:10:11,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 18:10:11,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2021-11-25 18:10:11,686 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:10:11,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:10:11,777 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2021-11-25 18:10:11,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:10:11,778 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-25 18:10:11,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:10:11,779 INFO L225 Difference]: With dead ends: 46 [2021-11-25 18:10:11,779 INFO L226 Difference]: Without dead ends: 46 [2021-11-25 18:10:11,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2021-11-25 18:10:11,780 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 55 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:10:11,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 31 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:10:11,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-25 18:10:11,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-11-25 18:10:11,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 45 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:10:11,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2021-11-25 18:10:11,784 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 34 [2021-11-25 18:10:11,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:10:11,784 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2021-11-25 18:10:11,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:10:11,784 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2021-11-25 18:10:11,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-25 18:10:11,785 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:10:11,785 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:10:11,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-25 18:10:11,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-25 18:10:11,990 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:10:11,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:10:11,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1426305195, now seen corresponding path program 1 times [2021-11-25 18:10:11,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:10:11,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234527673] [2021-11-25 18:10:11,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:10:11,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:10:12,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:10:12,086 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 18:10:12,086 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:10:12,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234527673] [2021-11-25 18:10:12,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234527673] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:10:12,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:10:12,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 18:10:12,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422585545] [2021-11-25 18:10:12,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:10:12,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:10:12,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:10:12,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:10:12,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:10:12,090 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:10:12,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:10:12,210 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2021-11-25 18:10:12,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:10:12,210 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-25 18:10:12,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:10:12,211 INFO L225 Difference]: With dead ends: 47 [2021-11-25 18:10:12,211 INFO L226 Difference]: Without dead ends: 47 [2021-11-25 18:10:12,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-25 18:10:12,212 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 107 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:10:12,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 12 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:10:12,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-25 18:10:12,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-11-25 18:10:12,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 46 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:10:12,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2021-11-25 18:10:12,215 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 36 [2021-11-25 18:10:12,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:10:12,215 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2021-11-25 18:10:12,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:10:12,216 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2021-11-25 18:10:12,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-25 18:10:12,216 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:10:12,216 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:10:12,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-25 18:10:12,216 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:10:12,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:10:12,217 INFO L85 PathProgramCache]: Analyzing trace with hash 946767685, now seen corresponding path program 1 times [2021-11-25 18:10:12,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:10:12,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293812377] [2021-11-25 18:10:12,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:10:12,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:10:12,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:10:12,635 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 18:10:12,635 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:10:12,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293812377] [2021-11-25 18:10:12,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293812377] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:10:12,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836291643] [2021-11-25 18:10:12,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:10:12,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:10:12,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:10:12,638 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:10:12,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 18:10:12,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:10:12,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 83 conjunts are in the unsatisfiable core [2021-11-25 18:10:12,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:10:13,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:10:13,543 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:10:13,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 56 [2021-11-25 18:10:13,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:10:13,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2021-11-25 18:10:13,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:13,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 59 [2021-11-25 18:10:14,478 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:10:14,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 58 [2021-11-25 18:10:14,962 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 18:10:14,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:10:23,976 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:10:23,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2021-11-25 18:10:23,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2021-11-25 18:10:23,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2021-11-25 18:10:23,999 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:10:24,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 61 [2021-11-25 18:10:24,640 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 18:10:24,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836291643] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:10:24,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1323361740] [2021-11-25 18:10:24,642 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2021-11-25 18:10:24,642 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:10:24,643 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:10:24,643 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:10:24,643 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:10:24,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:24,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:24,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:10:24,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:24,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:10:24,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:10:24,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:10:24,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:24,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:24,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 18:10:24,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:24,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 18:10:24,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:24,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 18:10:24,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:24,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:24,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:24,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-25 18:10:24,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:10:24,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:10:24,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:10:24,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:10:24,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:24,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:24,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:24,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:24,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:24,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:10:24,974 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:10:24,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 284 treesize of output 291 [2021-11-25 18:10:25,014 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:10:25,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 278 treesize of output 285 [2021-11-25 18:10:25,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:25,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:25,034 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:10:25,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 278 treesize of output 260 [2021-11-25 18:10:25,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:10:25,396 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:10:25,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 961 treesize of output 910 [2021-11-25 18:10:25,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:25,450 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:10:25,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 958 treesize of output 953 [2021-11-25 18:10:25,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:25,505 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:10:25,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 946 treesize of output 941 [2021-11-25 18:10:26,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:26,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:26,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:26,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:10:26,148 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 18:10:26,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 418 treesize of output 395 [2021-11-25 18:10:26,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:10:26,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:10:26,191 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-25 18:10:26,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 414 treesize of output 407 [2021-11-25 18:10:26,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:10:26,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:10:26,234 INFO L354 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2021-11-25 18:10:26,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 444 treesize of output 437 [2021-11-25 18:10:26,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:26,434 INFO L354 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2021-11-25 18:10:26,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 376 treesize of output 379 [2021-11-25 18:10:26,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:26,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:26,615 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:10:26,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 290 treesize of output 272 [2021-11-25 18:10:26,663 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:10:26,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 284 treesize of output 291 [2021-11-25 18:10:26,701 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:10:26,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 278 treesize of output 285 [2021-11-25 18:10:26,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:26,864 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:10:26,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 311 treesize of output 312 [2021-11-25 18:10:26,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:26,909 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:10:26,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 305 treesize of output 306 [2021-11-25 18:10:26,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:10:26,952 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:10:26,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 286 treesize of output 287 [2021-11-25 18:10:27,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:10:27,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:10:27,313 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-25 18:10:27,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 313 treesize of output 306 [2021-11-25 18:10:27,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:10:27,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:10:27,356 INFO L354 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2021-11-25 18:10:27,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 349 treesize of output 342 [2021-11-25 18:10:27,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:27,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:27,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:27,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:10:27,389 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-25 18:10:27,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 431 treesize of output 416 [2021-11-25 18:10:27,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:10:27,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:10:27,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:10:27,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:10:27,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:10:27,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:10:28,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:10:28,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2021-11-25 18:10:28,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2021-11-25 18:10:29,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:10:29,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:10:29,019 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:10:33,995 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5578#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_destroy_#in~head#1.offset| 0) (<= |ULTIMATE.start_main_~i~0#1| 0) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= 0 |ULTIMATE.start_sll_destroy_#in~head#1.offset|) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_sll_destroy_~head#1.base| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |ULTIMATE.start_sll_destroy_~head#1.offset| 0) (= |ULTIMATE.start_main_#res#1| 0) (= |#NULL.base| 0))' at error location [2021-11-25 18:10:33,995 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:10:33,996 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:10:33,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 52 [2021-11-25 18:10:33,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919348614] [2021-11-25 18:10:33,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:10:33,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-25 18:10:33,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:10:33,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-25 18:10:33,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=4516, Unknown=10, NotChecked=0, Total=4830 [2021-11-25 18:10:33,999 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 52 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:10:51,452 WARN L227 SmtUtils]: Spent 16.51s on a formula simplification. DAG size of input: 61 DAG size of output: 57 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:10:52,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:10:52,019 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2021-11-25 18:10:52,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-25 18:10:52,020 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 52 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-25 18:10:52,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:10:52,021 INFO L225 Difference]: With dead ends: 80 [2021-11-25 18:10:52,021 INFO L226 Difference]: Without dead ends: 80 [2021-11-25 18:10:52,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2199 ImplicationChecksByTransitivity, 33.3s TimeCoverageRelationStatistics Valid=516, Invalid=8216, Unknown=10, NotChecked=0, Total=8742 [2021-11-25 18:10:52,025 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 11 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:10:52,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 147 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 81 Unchecked, 0.0s Time] [2021-11-25 18:10:52,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-25 18:10:52,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 49. [2021-11-25 18:10:52,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 48 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:10:52,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2021-11-25 18:10:52,028 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 39 [2021-11-25 18:10:52,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:10:52,028 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2021-11-25 18:10:52,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 52 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:10:52,029 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2021-11-25 18:10:52,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-25 18:10:52,029 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:10:52,030 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:10:52,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-25 18:10:52,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-25 18:10:52,250 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:10:52,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:10:52,250 INFO L85 PathProgramCache]: Analyzing trace with hash 946766459, now seen corresponding path program 1 times [2021-11-25 18:10:52,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:10:52,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616816615] [2021-11-25 18:10:52,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:10:52,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:10:52,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:10:52,695 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 18:10:52,695 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:10:52,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616816615] [2021-11-25 18:10:52,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616816615] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:10:52,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166875757] [2021-11-25 18:10:52,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:10:52,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:10:52,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:10:52,697 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:10:52,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-25 18:10:52,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:10:52,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 77 conjunts are in the unsatisfiable core [2021-11-25 18:10:52,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:10:52,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:10:52,988 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:10:52,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-25 18:10:53,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:10:53,259 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:10:53,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2021-11-25 18:10:53,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:53,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2021-11-25 18:10:53,480 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:10:53,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-11-25 18:10:53,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 18:10:53,551 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 18:10:53,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:10:55,791 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_112| Int)) (or (and (forall ((v_ArrVal_1818 Int)) (not (= (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_112| v_ArrVal_1818) 4) |c_ULTIMATE.start_main_~s~0#1.base|))) (forall ((v_ArrVal_1818 Int)) (= (select |c_#valid| (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_112| v_ArrVal_1818) 4)) 1))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_112|))) is different from false [2021-11-25 18:10:55,829 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_112| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_112|) (and (forall ((v_ArrVal_1818 Int) (v_ArrVal_1816 (Array Int Int))) (= (select |c_#valid| (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1816) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_112| v_ArrVal_1818) 4)) 1)) (forall ((v_ArrVal_1818 Int) (v_ArrVal_1816 (Array Int Int))) (not (= (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1816) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_112| v_ArrVal_1818) 4) |c_ULTIMATE.start_main_~s~0#1.base|)))))) is different from false [2021-11-25 18:10:55,894 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_112| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_112|) (and (forall ((v_ArrVal_1818 Int) (v_ArrVal_1816 (Array Int Int))) (not (= (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) (+ 4 |c_ULTIMATE.start_sll_update_at_~head#1.offset|)) v_ArrVal_1816) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_112| v_ArrVal_1818) 4) |c_ULTIMATE.start_main_~s~0#1.base|))) (forall ((v_ArrVal_1818 Int) (v_ArrVal_1816 (Array Int Int))) (= (select |c_#valid| (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) (+ 4 |c_ULTIMATE.start_sll_update_at_~head#1.offset|)) v_ArrVal_1816) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_112| v_ArrVal_1818) 4)) 1))))) is different from false [2021-11-25 18:10:55,947 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_112| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_112|) (and (forall ((v_ArrVal_1818 Int) (v_ArrVal_1816 (Array Int Int))) (= (select |c_#valid| (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) v_ArrVal_1816) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_112| v_ArrVal_1818) 4)) 1)) (forall ((v_ArrVal_1818 Int) (v_ArrVal_1816 (Array Int Int))) (not (= (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) v_ArrVal_1816) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_112| v_ArrVal_1818) 4) |c_ULTIMATE.start_main_~s~0#1.base|)))))) is different from false [2021-11-25 18:10:55,976 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_112| Int)) (or (and (forall ((v_ArrVal_1818 Int) (v_ArrVal_1816 (Array Int Int))) (not (= (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4)) v_ArrVal_1816) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_112| v_ArrVal_1818) 4) |c_ULTIMATE.start_sll_create_~head~0#1.base|))) (forall ((v_ArrVal_1818 Int) (v_ArrVal_1816 (Array Int Int))) (= (select |c_#valid| (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4)) v_ArrVal_1816) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_112| v_ArrVal_1818) 4)) 1))) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_112|))) is different from false [2021-11-25 18:10:55,988 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:10:55,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 41 [2021-11-25 18:10:55,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 67 [2021-11-25 18:10:55,999 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:10:56,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 92 [2021-11-25 18:10:56,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 87 [2021-11-25 18:10:56,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 96 [2021-11-25 18:10:56,413 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 8 not checked. [2021-11-25 18:10:56,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166875757] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:10:56,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1737150038] [2021-11-25 18:10:56,415 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2021-11-25 18:10:56,415 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:10:56,416 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:10:56,416 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:10:56,416 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:10:56,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:56,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:56,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:10:56,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:10:56,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:10:56,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:56,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:10:56,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:56,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 18:10:56,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:56,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:56,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 18:10:56,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:56,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 18:10:56,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:56,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:56,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:56,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-25 18:10:56,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:10:56,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:10:56,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:10:56,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:10:56,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:56,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:56,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:56,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:56,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:56,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:10:56,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:56,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:56,724 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:10:56,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 297 treesize of output 279 [2021-11-25 18:10:56,760 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:10:56,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 291 treesize of output 298 [2021-11-25 18:10:56,797 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:10:56,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 285 treesize of output 292 [2021-11-25 18:10:56,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:56,976 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:10:56,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 318 treesize of output 319 [2021-11-25 18:10:56,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:10:57,023 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:10:57,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 299 treesize of output 300 [2021-11-25 18:10:57,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:57,068 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:10:57,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 308 treesize of output 309 [2021-11-25 18:10:57,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:10:57,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:10:57,410 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-25 18:10:57,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 320 treesize of output 313 [2021-11-25 18:10:57,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:10:57,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:10:57,459 INFO L354 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2021-11-25 18:10:57,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 404 treesize of output 397 [2021-11-25 18:10:57,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:57,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:57,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:57,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:10:57,522 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-25 18:10:57,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 450 treesize of output 435 [2021-11-25 18:10:57,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:57,687 INFO L354 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2021-11-25 18:10:57,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 435 treesize of output 430 [2021-11-25 18:10:57,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:57,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:57,889 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:10:57,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 297 treesize of output 279 [2021-11-25 18:10:57,926 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:10:57,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 291 treesize of output 298 [2021-11-25 18:10:57,964 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:10:57,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 285 treesize of output 292 [2021-11-25 18:10:58,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:10:58,315 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:10:58,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 989 treesize of output 938 [2021-11-25 18:10:58,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:58,369 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:10:58,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 986 treesize of output 981 [2021-11-25 18:10:58,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:58,423 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:10:58,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 974 treesize of output 969 [2021-11-25 18:10:58,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:58,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:58,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:10:58,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:10:58,975 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 18:10:58,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 425 treesize of output 402 [2021-11-25 18:10:58,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:10:58,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:10:59,007 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-25 18:10:59,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 421 treesize of output 414 [2021-11-25 18:10:59,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:10:59,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:10:59,039 INFO L354 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2021-11-25 18:10:59,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 457 treesize of output 450 [2021-11-25 18:10:59,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:10:59,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:10:59,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:10:59,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:10:59,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:10:59,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:11:00,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:11:00,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2021-11-25 18:11:00,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2021-11-25 18:11:00,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:11:00,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:11:00,474 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:11:04,213 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6049#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_destroy_#in~head#1.offset| 0) (<= |ULTIMATE.start_main_~i~0#1| 0) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (not (= (select |#valid| |ULTIMATE.start_sll_destroy_~head#1.base|) 1)) (<= 0 |ULTIMATE.start_sll_destroy_#in~head#1.offset|) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2021-11-25 18:11:04,213 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:11:04,213 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:11:04,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 17] total 40 [2021-11-25 18:11:04,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989418742] [2021-11-25 18:11:04,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:11:04,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-25 18:11:04,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:11:04,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-25 18:11:04,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=2554, Unknown=5, NotChecked=530, Total=3306 [2021-11-25 18:11:04,217 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 41 states, 40 states have (on average 2.175) internal successors, (87), 41 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:29,439 WARN L227 SmtUtils]: Spent 12.91s on a formula simplification. DAG size of input: 52 DAG size of output: 45 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:11:31,441 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) 4))) (and (not (= |c_ULTIMATE.start_main_~s~0#1.base| .cse0)) (= (select |c_#valid| .cse0) 1) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_112| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_112|) (and (forall ((v_ArrVal_1818 Int) (v_ArrVal_1816 (Array Int Int))) (= (select |c_#valid| (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) v_ArrVal_1816) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_112| v_ArrVal_1818) 4)) 1)) (forall ((v_ArrVal_1818 Int) (v_ArrVal_1816 (Array Int Int))) (not (= (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) v_ArrVal_1816) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_112| v_ArrVal_1818) 4) |c_ULTIMATE.start_main_~s~0#1.base|)))))) (= |c_ULTIMATE.start_main_~s~0#1.offset| (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) 4)) (= |c_ULTIMATE.start_main_~s~0#1.offset| 0))) is different from false [2021-11-25 18:12:08,520 WARN L227 SmtUtils]: Spent 15.02s on a formula simplification. DAG size of input: 47 DAG size of output: 37 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:12:32,584 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|))) (let ((.cse0 (select .cse1 4))) (and (not (= |c_ULTIMATE.start_main_~s~0#1.base| .cse0)) (not (= |c_ULTIMATE.start_sll_update_at_~head#1.base| |c_ULTIMATE.start_main_~s~0#1.base|)) (= |c_ULTIMATE.start_sll_update_at_~head#1.base| (select .cse1 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (= (select |c_#valid| .cse0) 1) (= |c_ULTIMATE.start_sll_update_at_~head#1.base| .cse0) (= |c_ULTIMATE.start_sll_update_at_~head#1.offset| 0) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_112| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_112|) (and (forall ((v_ArrVal_1818 Int) (v_ArrVal_1816 (Array Int Int))) (= (select |c_#valid| (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1816) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_112| v_ArrVal_1818) 4)) 1)) (forall ((v_ArrVal_1818 Int) (v_ArrVal_1816 (Array Int Int))) (not (= (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1816) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_112| v_ArrVal_1818) 4) |c_ULTIMATE.start_main_~s~0#1.base|)))))) (= |c_ULTIMATE.start_main_~s~0#1.offset| 0)))) is different from false [2021-11-25 18:12:33,041 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) 4))) (and (not (= |c_ULTIMATE.start_main_~s~0#1.base| .cse0)) (= (select |c_#valid| .cse0) 1) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_112| Int)) (or (and (forall ((v_ArrVal_1818 Int)) (not (= (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_112| v_ArrVal_1818) 4) |c_ULTIMATE.start_main_~s~0#1.base|))) (forall ((v_ArrVal_1818 Int)) (= (select |c_#valid| (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_112| v_ArrVal_1818) 4)) 1))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_112|))) (= |c_ULTIMATE.start_main_~s~0#1.offset| 0))) is different from false [2021-11-25 18:12:37,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:12:37,530 INFO L93 Difference]: Finished difference Result 51 states and 54 transitions. [2021-11-25 18:12:37,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-25 18:12:37,531 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.175) internal successors, (87), 41 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-25 18:12:37,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:12:37,531 INFO L225 Difference]: With dead ends: 51 [2021-11-25 18:12:37,532 INFO L226 Difference]: Without dead ends: 51 [2021-11-25 18:12:37,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 99.4s TimeCoverageRelationStatistics Valid=351, Invalid=3561, Unknown=26, NotChecked=1032, Total=4970 [2021-11-25 18:12:37,534 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 64 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 341 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:12:37,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 84 Invalid, 1077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 719 Invalid, 0 Unknown, 341 Unchecked, 0.4s Time] [2021-11-25 18:12:37,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-25 18:12:37,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2021-11-25 18:12:37,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.2) internal successors, (54), 49 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:12:37,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2021-11-25 18:12:37,537 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 39 [2021-11-25 18:12:37,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:12:37,537 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2021-11-25 18:12:37,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.175) internal successors, (87), 41 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:12:37,538 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2021-11-25 18:12:37,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-25 18:12:37,538 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:12:37,538 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:12:37,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-25 18:12:37,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-25 18:12:37,739 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:12:37,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:12:37,740 INFO L85 PathProgramCache]: Analyzing trace with hash 946766460, now seen corresponding path program 1 times [2021-11-25 18:12:37,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:12:37,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919186785] [2021-11-25 18:12:37,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:12:37,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:12:37,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:12:38,395 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 18:12:38,395 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:12:38,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919186785] [2021-11-25 18:12:38,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919186785] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:12:38,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042434836] [2021-11-25 18:12:38,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:12:38,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:12:38,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:12:38,397 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:12:38,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-25 18:12:38,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:12:38,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 97 conjunts are in the unsatisfiable core [2021-11-25 18:12:38,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:12:38,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:12:38,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:12:38,736 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:12:38,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-11-25 18:12:38,759 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:12:38,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-25 18:12:38,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:12:38,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:12:39,016 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:12:39,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2021-11-25 18:12:39,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:12:39,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-11-25 18:12:39,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:12:39,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-25 18:12:39,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:12:39,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2021-11-25 18:12:39,319 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:12:39,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-11-25 18:12:39,327 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:12:39,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-11-25 18:12:39,397 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 18:12:39,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:12:41,790 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_122| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_122|) (and (forall ((v_ArrVal_1936 Int) (v_ArrVal_1937 Int)) (<= (+ 8 (select (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_122| v_ArrVal_1936) 4)) (select |c_#length| (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_122| v_ArrVal_1937) 4)))) (forall ((v_ArrVal_1936 Int)) (<= 0 (+ (select (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_122| v_ArrVal_1936) 4) 4)))))) is different from false [2021-11-25 18:12:41,826 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_122| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_122|) (and (forall ((v_ArrVal_1934 (Array Int Int)) (v_ArrVal_1936 Int)) (<= 0 (+ (select (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1934) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_122| v_ArrVal_1936) 4) 4))) (forall ((v_ArrVal_1934 (Array Int Int)) (v_ArrVal_1936 Int) (v_ArrVal_1933 (Array Int Int)) (v_ArrVal_1937 Int)) (<= (+ (select (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1934) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_122| v_ArrVal_1936) 4) 8) (select |c_#length| (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1933) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_122| v_ArrVal_1937) 4))))))) is different from false [2021-11-25 18:12:41,885 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_122| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_122|) (and (forall ((v_ArrVal_1934 (Array Int Int)) (v_ArrVal_1936 Int) (v_ArrVal_1933 (Array Int Int)) (v_ArrVal_1937 Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) (+ 4 |c_ULTIMATE.start_sll_update_at_~head#1.offset|)))) (<= (+ (select (store (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1934) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_122| v_ArrVal_1936) 4) 8) (select |c_#length| (select (store (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1933) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_122| v_ArrVal_1937) 4))))) (forall ((v_ArrVal_1934 (Array Int Int)) (v_ArrVal_1936 Int)) (<= 0 (+ (select (store (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) (+ 4 |c_ULTIMATE.start_sll_update_at_~head#1.offset|)) v_ArrVal_1934) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_122| v_ArrVal_1936) 4) 4)))))) is different from false [2021-11-25 18:12:41,945 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_122| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_122|) (and (forall ((v_ArrVal_1934 (Array Int Int)) (v_ArrVal_1936 Int) (v_ArrVal_1933 (Array Int Int)) (v_ArrVal_1937 Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)))) (<= (+ (select (store (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1934) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_122| v_ArrVal_1936) 4) 8) (select |c_#length| (select (store (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1933) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_122| v_ArrVal_1937) 4))))) (forall ((v_ArrVal_1934 (Array Int Int)) (v_ArrVal_1936 Int)) (<= 0 (+ (select (store (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) v_ArrVal_1934) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_122| v_ArrVal_1936) 4) 4)))))) is different from false [2021-11-25 18:12:41,977 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_122| Int)) (or (and (forall ((v_ArrVal_1934 (Array Int Int)) (v_ArrVal_1936 Int)) (<= 0 (+ (select (store (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4)) v_ArrVal_1934) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_122| v_ArrVal_1936) 4) 4))) (forall ((v_ArrVal_1934 (Array Int Int)) (v_ArrVal_1936 Int) (v_ArrVal_1933 (Array Int Int)) (v_ArrVal_1937 Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4)))) (<= (+ (select (store (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1934) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_122| v_ArrVal_1936) 4) 8) (select |c_#length| (select (store (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1933) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_122| v_ArrVal_1937) 4)))))) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_122|))) is different from false [2021-11-25 18:12:41,990 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:12:41,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 64 [2021-11-25 18:12:41,995 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:12:41,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 64 [2021-11-25 18:12:42,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 89 [2021-11-25 18:12:42,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 146 [2021-11-25 18:12:42,016 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:12:42,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 196 treesize of output 196 [2021-11-25 18:12:42,028 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:12:42,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 243 treesize of output 243 [2021-11-25 18:12:42,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 261 treesize of output 255 [2021-11-25 18:12:42,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 311 treesize of output 303 [2021-11-25 18:12:42,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 315 treesize of output 313 [2021-11-25 18:12:42,645 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 8 not checked. [2021-11-25 18:12:42,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042434836] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:12:42,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [818412131] [2021-11-25 18:12:42,647 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2021-11-25 18:12:42,648 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:12:42,648 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:12:42,648 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:12:42,648 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:12:42,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:12:42,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:12:42,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:12:42,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:12:42,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:12:42,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:12:42,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:12:42,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:12:42,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:12:42,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 18:12:42,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:12:42,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 18:12:42,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:12:42,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 18:12:42,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:12:42,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:12:42,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:12:42,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:12:42,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:12:42,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-25 18:12:42,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:12:42,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:12:42,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:12:42,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:12:42,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:12:42,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:12:42,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:12:42,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:12:42,961 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:12:42,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 284 treesize of output 291 [2021-11-25 18:12:42,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:12:42,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:12:42,983 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:12:42,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 284 treesize of output 266 [2021-11-25 18:12:43,023 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:12:43,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 278 treesize of output 285 [2021-11-25 18:12:43,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:12:43,200 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:12:43,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 311 treesize of output 312 [2021-11-25 18:12:43,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:12:43,245 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:12:43,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 305 treesize of output 306 [2021-11-25 18:12:43,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:12:43,290 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:12:43,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 286 treesize of output 287 [2021-11-25 18:12:43,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:12:43,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:12:43,606 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-25 18:12:43,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 313 treesize of output 306 [2021-11-25 18:12:43,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:12:43,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:12:43,639 INFO L354 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2021-11-25 18:12:43,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 391 treesize of output 384 [2021-11-25 18:12:43,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:12:43,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:12:43,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:12:43,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:12:43,680 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-25 18:12:43,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 431 treesize of output 416 [2021-11-25 18:12:43,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:12:43,837 INFO L354 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2021-11-25 18:12:43,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 416 treesize of output 419 [2021-11-25 18:12:44,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:12:44,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:12:44,033 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:12:44,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 290 treesize of output 272 [2021-11-25 18:12:44,070 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:12:44,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 284 treesize of output 291 [2021-11-25 18:12:44,107 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:12:44,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 278 treesize of output 285 [2021-11-25 18:12:44,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:12:44,483 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:12:44,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 974 treesize of output 969 [2021-11-25 18:12:44,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:12:44,539 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:12:44,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 949 treesize of output 898 [2021-11-25 18:12:44,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:12:44,594 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:12:44,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 946 treesize of output 941 [2021-11-25 18:12:45,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:12:45,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:12:45,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:12:45,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:12:45,169 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 18:12:45,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 414 treesize of output 391 [2021-11-25 18:12:45,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:12:45,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:12:45,198 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 18:12:45,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 410 treesize of output 403 [2021-11-25 18:12:45,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:12:45,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:12:45,228 INFO L354 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2021-11-25 18:12:45,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 482 treesize of output 475 [2021-11-25 18:12:45,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:12:45,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:12:45,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:12:45,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:12:45,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:12:45,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:12:46,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:12:46,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2021-11-25 18:12:46,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2021-11-25 18:12:46,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:12:46,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:12:46,743 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:12:50,646 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6464#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_destroy_#in~head#1.offset| 0) (<= |ULTIMATE.start_main_~i~0#1| 0) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (or (< (select |#length| |ULTIMATE.start_sll_destroy_~head#1.base|) (+ 8 |ULTIMATE.start_sll_destroy_~head#1.offset|)) (< (+ |ULTIMATE.start_sll_destroy_~head#1.offset| 4) 0)) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= 0 |ULTIMATE.start_sll_destroy_#in~head#1.offset|) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2021-11-25 18:12:50,646 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:12:50,646 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:12:50,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 17] total 41 [2021-11-25 18:12:50,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929568255] [2021-11-25 18:12:50,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:12:50,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-25 18:12:50,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:12:50,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-25 18:12:50,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=2652, Unknown=5, NotChecked=540, Total=3422 [2021-11-25 18:12:50,649 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 42 states, 41 states have (on average 2.317073170731707) internal successors, (95), 42 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:13:14,326 WARN L227 SmtUtils]: Spent 23.25s on a formula simplification. DAG size of input: 77 DAG size of output: 72 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:13:15,301 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|))) (let ((.cse0 (select .cse1 4))) (and (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_122| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_122|) (and (forall ((v_ArrVal_1936 Int) (v_ArrVal_1937 Int)) (<= (+ 8 (select (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_122| v_ArrVal_1936) 4)) (select |c_#length| (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_122| v_ArrVal_1937) 4)))) (forall ((v_ArrVal_1936 Int)) (<= 0 (+ (select (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_122| v_ArrVal_1936) 4) 4)))))) (not (= |c_ULTIMATE.start_main_~s~0#1.base| .cse0)) (= |c_ULTIMATE.start_sll_update_at_~head#1.base| (select .cse1 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (= 0 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) 4)) (<= 8 (select |c_#length| .cse0)) (= |c_ULTIMATE.start_main_~s~0#1.offset| 0)))) is different from false [2021-11-25 18:13:15,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:13:15,917 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2021-11-25 18:13:15,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-25 18:13:15,918 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.317073170731707) internal successors, (95), 42 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-25 18:13:15,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:13:15,918 INFO L225 Difference]: With dead ends: 55 [2021-11-25 18:13:15,918 INFO L226 Difference]: Without dead ends: 55 [2021-11-25 18:13:15,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 77 SyntacticMatches, 6 SemanticMatches, 74 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 31.8s TimeCoverageRelationStatistics Valid=456, Invalid=4392, Unknown=6, NotChecked=846, Total=5700 [2021-11-25 18:13:15,920 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 156 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 379 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:13:15,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 62 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 631 Invalid, 0 Unknown, 379 Unchecked, 0.4s Time] [2021-11-25 18:13:15,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-25 18:13:15,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2021-11-25 18:13:15,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.173913043478261) internal successors, (54), 50 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:13:15,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2021-11-25 18:13:15,923 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 39 [2021-11-25 18:13:15,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:13:15,924 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2021-11-25 18:13:15,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.317073170731707) internal successors, (95), 42 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:13:15,924 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2021-11-25 18:13:15,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-25 18:13:15,925 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:13:15,925 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:13:15,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-25 18:13:16,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:13:16,134 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:13:16,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:13:16,135 INFO L85 PathProgramCache]: Analyzing trace with hash -690472460, now seen corresponding path program 1 times [2021-11-25 18:13:16,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:13:16,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968189935] [2021-11-25 18:13:16,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:13:16,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:13:16,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:13:16,627 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 18:13:16,628 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:13:16,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968189935] [2021-11-25 18:13:16,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968189935] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:13:16,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217729475] [2021-11-25 18:13:16,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:13:16,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:13:16,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:13:16,630 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:13:16,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-25 18:13:16,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:13:16,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 75 conjunts are in the unsatisfiable core [2021-11-25 18:13:16,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:13:16,946 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:13:16,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-25 18:13:16,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:13:17,118 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:13:17,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2021-11-25 18:13:17,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:17,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2021-11-25 18:13:17,362 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:13:17,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-11-25 18:13:17,415 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 18:13:17,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:13:18,121 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_132| Int) (v_ArrVal_2048 Int)) (or (<= (+ (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_132| v_ArrVal_2048) 4) 1) |c_#StackHeapBarrier|) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_132|))) is different from false [2021-11-25 18:13:18,133 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_132| Int) (v_ArrVal_2047 (Array Int Int)) (v_ArrVal_2048 Int)) (or (<= (+ (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_2047) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_132| v_ArrVal_2048) 4) 1) |c_#StackHeapBarrier|) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_132|))) is different from false [2021-11-25 18:13:18,159 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_132| Int) (v_ArrVal_2047 (Array Int Int)) (v_ArrVal_2048 Int)) (or (<= (+ (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) (+ 4 |c_ULTIMATE.start_sll_update_at_~head#1.offset|)) v_ArrVal_2047) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_132| v_ArrVal_2048) 4) 1) |c_#StackHeapBarrier|) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_132|))) is different from false [2021-11-25 18:13:18,181 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_132| Int) (v_ArrVal_2047 (Array Int Int)) (v_ArrVal_2048 Int)) (or (<= (+ (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) v_ArrVal_2047) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_132| v_ArrVal_2048) 4) 1) |c_#StackHeapBarrier|) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_132|))) is different from false [2021-11-25 18:13:18,195 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_132| Int) (v_ArrVal_2047 (Array Int Int)) (v_ArrVal_2048 Int)) (or (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_132|) (<= (+ (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4)) v_ArrVal_2047) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_132| v_ArrVal_2048) 4) 1) |c_#StackHeapBarrier|))) is different from false [2021-11-25 18:13:18,203 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:13:18,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2021-11-25 18:13:18,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2021-11-25 18:13:18,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2021-11-25 18:13:18,221 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:13:18,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 40 [2021-11-25 18:13:18,390 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 18:13:18,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2021-11-25 18:13:18,417 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 8 not checked. [2021-11-25 18:13:18,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217729475] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:13:18,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [887494694] [2021-11-25 18:13:18,419 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2021-11-25 18:13:18,419 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:13:18,420 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:13:18,420 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:13:18,420 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:13:18,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:18,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:18,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:13:18,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:18,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:13:18,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:13:18,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:13:18,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:18,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 18:13:18,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:18,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:18,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 18:13:18,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:18,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 18:13:18,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:18,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:18,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:18,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-25 18:13:18,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:13:18,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:13:18,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:13:18,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:13:18,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:18,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:18,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:18,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:18,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:18,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:13:18,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:18,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:18,732 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:13:18,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 297 treesize of output 279 [2021-11-25 18:13:18,767 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:13:18,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 291 treesize of output 298 [2021-11-25 18:13:18,802 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:13:18,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 285 treesize of output 292 [2021-11-25 18:13:18,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:18,945 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:13:18,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 318 treesize of output 319 [2021-11-25 18:13:18,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:13:18,992 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:13:18,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 299 treesize of output 300 [2021-11-25 18:13:19,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:19,034 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:13:19,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 308 treesize of output 309 [2021-11-25 18:13:19,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:13:19,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:13:19,318 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-25 18:13:19,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 320 treesize of output 313 [2021-11-25 18:13:19,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:13:19,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:13:19,351 INFO L354 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2021-11-25 18:13:19,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 362 treesize of output 355 [2021-11-25 18:13:19,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:19,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:19,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:19,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:13:19,375 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-25 18:13:19,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 450 treesize of output 435 [2021-11-25 18:13:19,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:19,523 INFO L354 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2021-11-25 18:13:19,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 435 treesize of output 430 [2021-11-25 18:13:19,733 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:13:19,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 291 treesize of output 298 [2021-11-25 18:13:19,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:19,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:19,751 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:13:19,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 291 treesize of output 273 [2021-11-25 18:13:19,788 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:13:19,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 285 treesize of output 292 [2021-11-25 18:13:19,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:19,935 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:13:19,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 318 treesize of output 319 [2021-11-25 18:13:19,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:13:19,978 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:13:19,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 299 treesize of output 300 [2021-11-25 18:13:19,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:20,020 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:13:20,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 308 treesize of output 309 [2021-11-25 18:13:20,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:20,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:20,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:20,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:13:20,275 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 18:13:20,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 305 treesize of output 290 [2021-11-25 18:13:20,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:13:20,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:13:20,304 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 18:13:20,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 301 treesize of output 294 [2021-11-25 18:13:20,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:13:20,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:13:20,332 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 18:13:20,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 313 treesize of output 306 [2021-11-25 18:13:20,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:13:20,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:13:20,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:13:20,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:13:20,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:13:20,667 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 15 treesize of output 1 [2021-11-25 18:13:21,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:13:21,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2021-11-25 18:13:21,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2021-11-25 18:13:21,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:13:21,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:13:21,753 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:13:25,270 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6902#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_destroy_#in~head#1.offset| 0) (<= |ULTIMATE.start_main_~i~0#1| 0) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= 0 |ULTIMATE.start_sll_destroy_#in~head#1.offset|) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= |#StackHeapBarrier| |ULTIMATE.start_sll_destroy_~head#1.base|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |ULTIMATE.start_sll_destroy_~head#1.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-25 18:13:25,271 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:13:25,271 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:13:25,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 36 [2021-11-25 18:13:25,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773187498] [2021-11-25 18:13:25,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:13:25,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-25 18:13:25,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:13:25,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-25 18:13:25,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=2154, Unknown=5, NotChecked=490, Total=2862 [2021-11-25 18:13:25,273 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand has 37 states, 36 states have (on average 2.361111111111111) internal successors, (85), 37 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:13:26,155 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|))) (let ((.cse0 (select .cse1 4))) (and (not (= |c_ULTIMATE.start_main_~s~0#1.base| .cse0)) (= |c_ULTIMATE.start_sll_update_at_~head#1.base| (select .cse1 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_132| Int) (v_ArrVal_2048 Int)) (or (<= (+ (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_132| v_ArrVal_2048) 4) 1) |c_#StackHeapBarrier|) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_132|))) (<= (+ 1 .cse0) |c_#StackHeapBarrier|) (= |c_ULTIMATE.start_main_~s~0#1.offset| 0)))) is different from false [2021-11-25 18:13:26,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:13:26,741 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2021-11-25 18:13:26,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-25 18:13:26,741 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.361111111111111) internal successors, (85), 37 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-25 18:13:26,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:13:26,742 INFO L225 Difference]: With dead ends: 52 [2021-11-25 18:13:26,742 INFO L226 Difference]: Without dead ends: 52 [2021-11-25 18:13:26,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 85 SyntacticMatches, 9 SemanticMatches, 66 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 986 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=377, Invalid=3423, Unknown=6, NotChecked=750, Total=4556 [2021-11-25 18:13:26,743 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 129 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 308 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:13:26,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 89 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 510 Invalid, 0 Unknown, 308 Unchecked, 0.3s Time] [2021-11-25 18:13:26,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-25 18:13:26,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-11-25 18:13:26,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 51 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:13:26,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2021-11-25 18:13:26,747 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 41 [2021-11-25 18:13:26,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:13:26,747 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2021-11-25 18:13:26,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.361111111111111) internal successors, (85), 37 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:13:26,747 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2021-11-25 18:13:26,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-25 18:13:26,748 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:13:26,748 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:13:26,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-25 18:13:26,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:13:26,958 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:13:26,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:13:26,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1266512548, now seen corresponding path program 2 times [2021-11-25 18:13:26,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:13:26,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780473867] [2021-11-25 18:13:26,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:13:26,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:13:27,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:13:27,655 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 18:13:27,655 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:13:27,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780473867] [2021-11-25 18:13:27,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780473867] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:13:27,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031968723] [2021-11-25 18:13:27,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:13:27,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:13:27,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:13:27,656 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:13:27,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-25 18:13:27,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 18:13:27,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:13:27,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 81 conjunts are in the unsatisfiable core [2021-11-25 18:13:27,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:13:27,966 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-25 18:13:27,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 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 23 treesize of output 31 [2021-11-25 18:13:28,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:13:28,308 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:13:28,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 44 [2021-11-25 18:13:28,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:28,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 31 [2021-11-25 18:13:28,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 18 [2021-11-25 18:13:28,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 18:13:28,753 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 18:13:28,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-25 18:13:28,835 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 18:13:28,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:13:29,775 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2163 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_142| Int)) (or (= (store (store |c_#valid| |c_ULTIMATE.start_main_~s~0#1.base| 0) (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_142| v_ArrVal_2163) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) 0) |c_ULTIMATE.start_main_old_#valid#1|) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_142|))) is different from false [2021-11-25 18:13:29,788 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2163 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_142| Int) (v_ArrVal_2162 (Array Int Int))) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_142|) (= (store (store |c_#valid| |c_ULTIMATE.start_main_~s~0#1.base| 0) (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_2162) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_142| v_ArrVal_2163) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) 0) |c_ULTIMATE.start_main_old_#valid#1|))) is different from false [2021-11-25 18:13:29,812 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2163 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_142| Int) (v_ArrVal_2162 (Array Int Int))) (or (= (store (store |c_#valid| |c_ULTIMATE.start_main_~s~0#1.base| 0) (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) (+ 4 |c_ULTIMATE.start_sll_update_at_~head#1.offset|)) v_ArrVal_2162) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_142| v_ArrVal_2163) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) 0) |c_ULTIMATE.start_main_old_#valid#1|) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_142|))) is different from false [2021-11-25 18:13:29,836 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2163 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_142| Int) (v_ArrVal_2162 (Array Int Int))) (or (= (store (store |c_#valid| |c_ULTIMATE.start_main_~s~0#1.base| 0) (let ((.cse0 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) .cse0) v_ArrVal_2162) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_142| v_ArrVal_2163) .cse0)) 0) |c_ULTIMATE.start_main_old_#valid#1|) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_142|))) is different from false [2021-11-25 18:13:29,851 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2163 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_142| Int) (v_ArrVal_2162 (Array Int Int))) (or (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_142|) (= (store (store |c_#valid| |c_ULTIMATE.start_sll_create_~head~0#1.base| 0) (let ((.cse0 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4))) (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse0) v_ArrVal_2162) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_142| v_ArrVal_2163) .cse0)) 0) |c_ULTIMATE.start_main_old_#valid#1|))) is different from false [2021-11-25 18:13:29,861 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:13:29,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 36 [2021-11-25 18:13:29,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 58 [2021-11-25 18:13:29,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:13:29,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-11-25 18:13:29,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:13:29,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 18:13:33,380 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_antiDerIndex_entry0_1 Int)) (let ((.cse0 (= |c_ULTIMATE.start_node_create_~temp~0#1.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|))) (or (and .cse0 (forall ((v_arrayElimCell_1050 Int)) (= (select |c_ULTIMATE.start_main_old_#valid#1| v_antiDerIndex_entry0_1) (select (store (store |c_#valid| |c_ULTIMATE.start_node_create_~temp~0#1.base| 0) v_arrayElimCell_1050 0) v_antiDerIndex_entry0_1)))) (and (not .cse0) (= (select |c_ULTIMATE.start_main_old_#valid#1| v_antiDerIndex_entry0_1) (select (store (store |c_#valid| |c_ULTIMATE.start_node_create_~temp~0#1.base| 0) |c_ULTIMATE.start_sll_create_~head~0#1.base| 0) v_antiDerIndex_entry0_1)))))) is different from false [2021-11-25 18:13:40,438 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 12 not checked. [2021-11-25 18:13:40,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031968723] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:13:40,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1954868812] [2021-11-25 18:13:40,441 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2021-11-25 18:13:40,441 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:13:40,441 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:13:40,442 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:13:40,442 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:13:40,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:40,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:40,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:13:40,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:13:40,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:13:40,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:40,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:13:40,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:40,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 18:13:40,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:40,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:40,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 18:13:40,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:40,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 18:13:40,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:40,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:40,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:40,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-25 18:13:40,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:13:40,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:13:40,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:13:40,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:13:40,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:40,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:40,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:40,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:40,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:40,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:13:40,806 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:13:40,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 284 treesize of output 291 [2021-11-25 18:13:40,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:40,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:40,828 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:13:40,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 284 treesize of output 266 [2021-11-25 18:13:40,906 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:13:40,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 278 treesize of output 285 [2021-11-25 18:13:41,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:41,086 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:13:41,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 311 treesize of output 312 [2021-11-25 18:13:41,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:13:41,131 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:13:41,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 292 treesize of output 293 [2021-11-25 18:13:41,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:41,175 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:13:41,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 301 treesize of output 302 [2021-11-25 18:13:41,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:13:41,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:13:41,475 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-25 18:13:41,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 313 treesize of output 306 [2021-11-25 18:13:41,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:13:41,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:13:41,508 INFO L354 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2021-11-25 18:13:41,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 349 treesize of output 342 [2021-11-25 18:13:41,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:41,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:41,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:41,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:13:41,532 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-25 18:13:41,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 431 treesize of output 416 [2021-11-25 18:13:41,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:41,729 INFO L354 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2021-11-25 18:13:41,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 416 treesize of output 419 [2021-11-25 18:13:41,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:41,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:41,939 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:13:41,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 290 treesize of output 272 [2021-11-25 18:13:41,975 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:13:41,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 284 treesize of output 291 [2021-11-25 18:13:42,012 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:13:42,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 278 treesize of output 285 [2021-11-25 18:13:42,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:42,286 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:13:42,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 714 treesize of output 709 [2021-11-25 18:13:42,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:13:42,343 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:13:42,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 689 treesize of output 658 [2021-11-25 18:13:42,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:42,396 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:13:42,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 690 treesize of output 691 [2021-11-25 18:13:42,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:42,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:42,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:13:42,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:13:42,863 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 18:13:42,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 418 treesize of output 395 [2021-11-25 18:13:42,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:13:42,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:13:42,900 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 18:13:42,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 414 treesize of output 407 [2021-11-25 18:13:42,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:13:42,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:13:42,929 INFO L354 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2021-11-25 18:13:42,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 492 treesize of output 485 [2021-11-25 18:13:43,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:13:43,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:13:43,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:13:43,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:13:43,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:13:43,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:13:44,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:13:44,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2021-11-25 18:13:44,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2021-11-25 18:13:44,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:13:44,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:13:44,477 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:13:49,061 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7359#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_destroy_#in~head#1.offset| 0) (<= |ULTIMATE.start_main_~i~0#1| 0) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= 0 |ULTIMATE.start_sll_destroy_#in~head#1.offset|) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_sll_destroy_~head#1.base| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |ULTIMATE.start_sll_destroy_~head#1.offset| 0) (= |ULTIMATE.start_main_#res#1| 0) (= |#NULL.base| 0))' at error location [2021-11-25 18:13:49,061 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:13:49,062 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:13:49,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 17] total 43 [2021-11-25 18:13:49,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060063397] [2021-11-25 18:13:49,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:13:49,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-25 18:13:49,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:13:49,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-25 18:13:49,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=3007, Unknown=9, NotChecked=690, Total=3906 [2021-11-25 18:13:49,064 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 45 states, 44 states have (on average 2.5454545454545454) internal successors, (112), 44 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:14:21,927 WARN L227 SmtUtils]: Spent 25.36s on a formula simplification. DAG size of input: 43 DAG size of output: 32 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:14:22,926 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|))) (let ((.cse0 (select .cse2 4)) (.cse1 (select .cse2 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)))) (and (= (store (store |c_#valid| |c_ULTIMATE.start_main_~s~0#1.base| 0) .cse0 0) |c_ULTIMATE.start_main_old_#valid#1|) (not (= |c_ULTIMATE.start_main_~s~0#1.base| .cse0)) (= (select |c_ULTIMATE.start_main_old_#valid#1| .cse1) 0) (not (= .cse1 |c_ULTIMATE.start_main_~s~0#1.base|)) (= (select |c_ULTIMATE.start_main_old_#valid#1| |c_ULTIMATE.start_main_~s~0#1.base|) 0) (= 1 (select |c_#valid| .cse1)) (forall ((v_ArrVal_2163 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_142| Int)) (or (= (store (store |c_#valid| |c_ULTIMATE.start_main_~s~0#1.base| 0) (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_142| v_ArrVal_2163) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) 0) |c_ULTIMATE.start_main_old_#valid#1|) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_142|))) (= |c_ULTIMATE.start_main_~s~0#1.offset| 0)))) is different from false [2021-11-25 18:14:24,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:14:24,227 INFO L93 Difference]: Finished difference Result 97 states and 103 transitions. [2021-11-25 18:14:24,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-25 18:14:24,228 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.5454545454545454) internal successors, (112), 44 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-25 18:14:24,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:14:24,229 INFO L225 Difference]: With dead ends: 97 [2021-11-25 18:14:24,229 INFO L226 Difference]: Without dead ends: 96 [2021-11-25 18:14:24,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 7 IntricatePredicates, 1 DeprecatedPredicates, 1086 ImplicationChecksByTransitivity, 50.4s TimeCoverageRelationStatistics Valid=362, Invalid=4768, Unknown=10, NotChecked=1022, Total=6162 [2021-11-25 18:14:24,231 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 138 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 1310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 558 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:14:24,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 224 Invalid, 1310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 733 Invalid, 0 Unknown, 558 Unchecked, 0.6s Time] [2021-11-25 18:14:24,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-25 18:14:24,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 88. [2021-11-25 18:14:24,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.1325301204819278) internal successors, (94), 87 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:14:24,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2021-11-25 18:14:24,235 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 44 [2021-11-25 18:14:24,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:14:24,236 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2021-11-25 18:14:24,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.5454545454545454) internal successors, (112), 44 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:14:24,236 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2021-11-25 18:14:24,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-25 18:14:24,237 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:14:24,237 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:14:24,266 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-11-25 18:14:24,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:14:24,450 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:14:24,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:14:24,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1266513774, now seen corresponding path program 2 times [2021-11-25 18:14:24,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:14:24,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086572773] [2021-11-25 18:14:24,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:14:24,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:14:24,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:14:25,359 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 18:14:25,359 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:14:25,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086572773] [2021-11-25 18:14:25,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086572773] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:14:25,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852778864] [2021-11-25 18:14:25,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:14:25,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:14:25,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:14:25,360 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:14:25,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-25 18:14:25,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 18:14:25,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:14:25,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 116 conjunts are in the unsatisfiable core [2021-11-25 18:14:25,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:14:25,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:14:25,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:14:25,727 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:14:25,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-25 18:14:25,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 18:14:25,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 18:14:25,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 18:14:25,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 18:14:25,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 18:14:25,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2021-11-25 18:14:26,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:26,205 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-11-25 18:14:26,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 52 [2021-11-25 18:14:26,219 INFO L354 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2021-11-25 18:14:26,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 45 [2021-11-25 18:14:26,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:26,378 INFO L354 Elim1Store]: treesize reduction 39, result has 15.2 percent of original size [2021-11-25 18:14:26,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 41 [2021-11-25 18:14:26,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2021-11-25 18:14:26,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:14:26,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:14:26,823 INFO L354 Elim1Store]: treesize reduction 33, result has 19.5 percent of original size [2021-11-25 18:14:26,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 43 [2021-11-25 18:14:26,833 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:14:26,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-11-25 18:14:26,885 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 18:14:26,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:14:26,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-25 18:15:49,081 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_153| Int) (v_ArrVal_2288 Int)) (let ((.cse0 (+ 4 |c_ULTIMATE.start_sll_update_at_~head#1.offset|))) (let ((.cse1 (let ((.cse4 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) .cse0))) (store |c_#memory_$Pointer$.base| .cse4 (store (select |c_#memory_$Pointer$.base| .cse4) |v_ULTIMATE.start_sll_update_at_~head#1.offset_153| v_ArrVal_2288))))) (let ((.cse2 (select (select .cse1 |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)))) (or (< (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base|) .cse0) |v_ULTIMATE.start_sll_update_at_~head#1.offset_153|) (and (= (select (select .cse1 .cse2) 4) 0) (forall ((v_ArrVal_2287 Int)) (= (select (let ((.cse3 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) (+ 4 |c_ULTIMATE.start_sll_update_at_~head#1.offset|)))) (select (store |c_#memory_$Pointer$.offset| .cse3 (store (select |c_#memory_$Pointer$.offset| .cse3) |v_ULTIMATE.start_sll_update_at_~head#1.offset_153| v_ArrVal_2287)) (select (select (store |c_#memory_$Pointer$.base| .cse3 (store (select |c_#memory_$Pointer$.base| .cse3) |v_ULTIMATE.start_sll_update_at_~head#1.offset_153| v_ArrVal_2288)) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)))) 4) 0))) (= |c_ULTIMATE.start_main_~s~0#1.base| .cse2)))))) is different from false [2021-11-25 18:15:51,264 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_153| Int) (v_ArrVal_2288 Int)) (let ((.cse1 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (let ((.cse2 (let ((.cse5 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) .cse1))) (store |c_#memory_$Pointer$.base| .cse5 (store (select |c_#memory_$Pointer$.base| .cse5) |v_ULTIMATE.start_sll_update_at_~head#1.offset_153| v_ArrVal_2288))))) (let ((.cse0 (select (select .cse2 |c_ULTIMATE.start_main_~s~0#1.base|) .cse1))) (or (= .cse0 |c_ULTIMATE.start_main_~s~0#1.base|) (< (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) .cse1) |v_ULTIMATE.start_sll_update_at_~head#1.offset_153|) (and (= 0 (select (select .cse2 .cse0) 4)) (forall ((v_ArrVal_2287 Int)) (= (select (let ((.cse4 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (let ((.cse3 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) .cse4))) (select (store |c_#memory_$Pointer$.offset| .cse3 (store (select |c_#memory_$Pointer$.offset| .cse3) |v_ULTIMATE.start_sll_update_at_~head#1.offset_153| v_ArrVal_2287)) (select (select (store |c_#memory_$Pointer$.base| .cse3 (store (select |c_#memory_$Pointer$.base| .cse3) |v_ULTIMATE.start_sll_update_at_~head#1.offset_153| v_ArrVal_2288)) |c_ULTIMATE.start_main_~s~0#1.base|) .cse4)))) 4) 0)))))))) is different from false [2021-11-25 18:15:53,378 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_153| Int) (v_ArrVal_2288 Int)) (let ((.cse4 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4))) (let ((.cse0 (let ((.cse5 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse4))) (store |c_#memory_$Pointer$.base| .cse5 (store (select |c_#memory_$Pointer$.base| .cse5) |v_ULTIMATE.start_sll_update_at_~head#1.offset_153| v_ArrVal_2288))))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse4))) (or (and (= (select (select .cse0 .cse1) 4) 0) (forall ((v_ArrVal_2287 Int)) (= 0 (select (let ((.cse3 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4))) (let ((.cse2 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse3))) (select (store |c_#memory_$Pointer$.offset| .cse2 (store (select |c_#memory_$Pointer$.offset| .cse2) |v_ULTIMATE.start_sll_update_at_~head#1.offset_153| v_ArrVal_2287)) (select (select (store |c_#memory_$Pointer$.base| .cse2 (store (select |c_#memory_$Pointer$.base| .cse2) |v_ULTIMATE.start_sll_update_at_~head#1.offset_153| v_ArrVal_2288)) |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse3)))) 4)))) (= .cse1 |c_ULTIMATE.start_sll_create_~head~0#1.base|) (< (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse4) |v_ULTIMATE.start_sll_update_at_~head#1.offset_153|)))))) is different from false [2021-11-25 18:15:55,674 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_sll_create_~new_head~0#1.offset| Int) (v_ArrVal_2284 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_153| Int) (v_ArrVal_2288 Int)) (let ((.cse5 (+ 4 |ULTIMATE.start_sll_create_~new_head~0#1.offset|))) (let ((.cse0 (let ((.cse6 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) .cse5 |c_ULTIMATE.start_sll_create_~head~0#1.base|)))) (store .cse6 |c_ULTIMATE.start_sll_create_~head~0#1.base| (store (select .cse6 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_153| v_ArrVal_2288))))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) .cse5))) (or (and (= (select (select .cse0 .cse1) 4) 0) (forall ((v_ArrVal_2287 Int)) (= (select (let ((.cse3 (+ 4 |ULTIMATE.start_sll_create_~new_head~0#1.offset|))) (select (let ((.cse2 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) .cse3 v_ArrVal_2284)))) (store .cse2 |c_ULTIMATE.start_sll_create_~head~0#1.base| (store (select .cse2 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_153| v_ArrVal_2287))) (select (select (let ((.cse4 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) .cse3 |c_ULTIMATE.start_sll_create_~head~0#1.base|)))) (store .cse4 |c_ULTIMATE.start_sll_create_~head~0#1.base| (store (select .cse4 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_153| v_ArrVal_2288))) |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) .cse3))) 4) 0))) (< v_ArrVal_2284 |v_ULTIMATE.start_sll_update_at_~head#1.offset_153|) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| v_ArrVal_2284) (= .cse1 |c_ULTIMATE.start_sll_create_~new_head~0#1.base|)))))) is different from false [2021-11-25 18:15:55,699 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:15:55,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 122 [2021-11-25 18:15:55,712 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:15:55,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 155 treesize of output 123 [2021-11-25 18:15:55,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:15:56,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:15:56,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:15:56,506 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_sll_create_~new_head~0#1.offset| Int) (v_arrayElimArr_13 (Array Int Int)) (v_arrayElimArr_12 (Array Int Int)) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_153| Int) (v_ArrVal_2288 Int)) (let ((.cse2 (let ((.cse6 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_arrayElimArr_13))) (store .cse6 |c_ULTIMATE.start_sll_create_~head~0#1.base| (store (select .cse6 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_153| v_ArrVal_2288)))) (.cse0 (+ 4 |ULTIMATE.start_sll_create_~new_head~0#1.offset|))) (let ((.cse3 (select (select .cse2 |c_ULTIMATE.start_node_create_~temp~0#1.base|) .cse0)) (.cse1 (select v_arrayElimArr_12 .cse0))) (or (not (= (select v_arrayElimArr_13 .cse0) |c_ULTIMATE.start_sll_create_~head~0#1.base|)) (< .cse1 |v_ULTIMATE.start_sll_update_at_~head#1.offset_153|) (and (= (select (select .cse2 .cse3) 4) 0) (forall ((v_ArrVal_2287 Int)) (= (select (select (let ((.cse4 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_arrayElimArr_12))) (store .cse4 |c_ULTIMATE.start_sll_create_~head~0#1.base| (store (select .cse4 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_153| v_ArrVal_2287))) (select (select (let ((.cse5 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_arrayElimArr_13))) (store .cse5 |c_ULTIMATE.start_sll_create_~head~0#1.base| (store (select .cse5 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_153| v_ArrVal_2288))) |c_ULTIMATE.start_node_create_~temp~0#1.base|) (+ 4 |ULTIMATE.start_sll_create_~new_head~0#1.offset|))) 4) 0))) (= |c_ULTIMATE.start_node_create_~temp~0#1.base| .cse3) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| .cse1))))) is different from false [2021-11-25 18:15:56,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:15:56,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:15:57,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:15:57,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:15:57,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:15:57,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:15:58,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:15:58,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:15:58,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:15:59,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:15:59,607 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:15:59,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 207 treesize of output 137 [2021-11-25 18:15:59,618 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:15:59,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 137 treesize of output 127 [2021-11-25 18:15:59,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:15:59,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:15:59,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:59,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 60 [2021-11-25 18:15:59,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:15:59,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:15:59,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:59,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 41 [2021-11-25 18:15:59,674 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:15:59,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 55 [2021-11-25 18:15:59,697 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:15:59,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 69 [2021-11-25 18:15:59,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 69 [2021-11-25 18:15:59,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 18:15:59,728 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 18:15:59,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2021-11-25 18:15:59,869 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 10 not checked. [2021-11-25 18:15:59,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852778864] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:15:59,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1558273898] [2021-11-25 18:15:59,872 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2021-11-25 18:15:59,872 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:15:59,872 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:15:59,872 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:15:59,873 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:15:59,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:59,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:59,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:15:59,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:15:59,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:15:59,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:59,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:16:00,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:00,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 18:16:00,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:00,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:00,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 18:16:00,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:00,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 18:16:00,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:00,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:16:00,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:00,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:16:00,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:00,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:00,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:00,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-25 18:16:00,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:00,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:00,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:00,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:00,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:00,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:16:00,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:00,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:00,283 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:16:00,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 290 treesize of output 272 [2021-11-25 18:16:00,323 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:16:00,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 284 treesize of output 291 [2021-11-25 18:16:00,367 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:16:00,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 278 treesize of output 285 [2021-11-25 18:16:00,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:00,530 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:16:00,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 311 treesize of output 312 [2021-11-25 18:16:00,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:00,581 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:16:00,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 292 treesize of output 293 [2021-11-25 18:16:00,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:00,633 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:16:00,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 301 treesize of output 302 [2021-11-25 18:16:00,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:00,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:00,949 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 18:16:00,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 301 treesize of output 294 [2021-11-25 18:16:00,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:00,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:00,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:00,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:00,975 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-25 18:16:00,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 383 treesize of output 368 [2021-11-25 18:16:00,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:00,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:01,025 INFO L354 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2021-11-25 18:16:01,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 379 treesize of output 372 [2021-11-25 18:16:01,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:01,192 INFO L354 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2021-11-25 18:16:01,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 380 treesize of output 383 [2021-11-25 18:16:01,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:01,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:01,395 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:16:01,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 290 treesize of output 272 [2021-11-25 18:16:01,437 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:16:01,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 284 treesize of output 291 [2021-11-25 18:16:01,480 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:16:01,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 278 treesize of output 285 [2021-11-25 18:16:01,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:01,648 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:16:01,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 311 treesize of output 312 [2021-11-25 18:16:01,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:01,699 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:16:01,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 292 treesize of output 293 [2021-11-25 18:16:01,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:01,750 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:16:01,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 301 treesize of output 302 [2021-11-25 18:16:02,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:02,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:02,073 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-25 18:16:02,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 313 treesize of output 306 [2021-11-25 18:16:02,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:02,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:02,109 INFO L354 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2021-11-25 18:16:02,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 391 treesize of output 384 [2021-11-25 18:16:02,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:02,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:02,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:02,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:02,134 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-25 18:16:02,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 431 treesize of output 416 [2021-11-25 18:16:02,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:16:02,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:16:02,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:16:02,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:16:02,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:16:02,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:16:03,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:16:03,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2021-11-25 18:16:03,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2021-11-25 18:16:03,676 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 [2021-11-25 18:16:03,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:16:03,686 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:16:08,684 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7905#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_destroy_#in~head#1.offset| 0) (<= |ULTIMATE.start_main_~i~0#1| 0) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (not (= (select |#valid| |ULTIMATE.start_sll_destroy_~head#1.base|) 1)) (<= 0 |ULTIMATE.start_sll_destroy_#in~head#1.offset|) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2021-11-25 18:16:08,684 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:16:08,684 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:16:08,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 47 [2021-11-25 18:16:08,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468960364] [2021-11-25 18:16:08,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:16:08,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-25 18:16:08,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:16:08,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-25 18:16:08,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=3312, Unknown=15, NotChecked=600, Total=4160 [2021-11-25 18:16:08,686 INFO L87 Difference]: Start difference. First operand 88 states and 94 transitions. Second operand has 48 states, 48 states have (on average 2.125) internal successors, (102), 47 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:16:08,819 WARN L838 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_node_create_~temp~0#1.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|)) (forall ((|ULTIMATE.start_sll_create_~new_head~0#1.offset| Int) (v_arrayElimArr_13 (Array Int Int)) (v_arrayElimArr_12 (Array Int Int)) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_153| Int) (v_ArrVal_2288 Int)) (let ((.cse2 (let ((.cse6 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_arrayElimArr_13))) (store .cse6 |c_ULTIMATE.start_sll_create_~head~0#1.base| (store (select .cse6 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_153| v_ArrVal_2288)))) (.cse0 (+ 4 |ULTIMATE.start_sll_create_~new_head~0#1.offset|))) (let ((.cse3 (select (select .cse2 |c_ULTIMATE.start_node_create_~temp~0#1.base|) .cse0)) (.cse1 (select v_arrayElimArr_12 .cse0))) (or (not (= (select v_arrayElimArr_13 .cse0) |c_ULTIMATE.start_sll_create_~head~0#1.base|)) (< .cse1 |v_ULTIMATE.start_sll_update_at_~head#1.offset_153|) (and (= (select (select .cse2 .cse3) 4) 0) (forall ((v_ArrVal_2287 Int)) (= (select (select (let ((.cse4 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_arrayElimArr_12))) (store .cse4 |c_ULTIMATE.start_sll_create_~head~0#1.base| (store (select .cse4 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_153| v_ArrVal_2287))) (select (select (let ((.cse5 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_arrayElimArr_13))) (store .cse5 |c_ULTIMATE.start_sll_create_~head~0#1.base| (store (select .cse5 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_153| v_ArrVal_2288))) |c_ULTIMATE.start_node_create_~temp~0#1.base|) (+ 4 |ULTIMATE.start_sll_create_~new_head~0#1.offset|))) 4) 0))) (= |c_ULTIMATE.start_node_create_~temp~0#1.base| .cse3) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| .cse1))))) (= (select |c_#valid| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 1) (= |c_ULTIMATE.start_node_create_~temp~0#1.offset| 0) (= |c_ULTIMATE.start_sll_create_~head~0#1.offset| 0) (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4) 0) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4) 0)) is different from false [2021-11-25 18:16:08,825 WARN L838 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_node_create_~temp~0#1.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|)) (forall ((|ULTIMATE.start_sll_create_~new_head~0#1.offset| Int) (v_arrayElimArr_13 (Array Int Int)) (v_arrayElimArr_12 (Array Int Int)) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_153| Int) (v_ArrVal_2288 Int)) (let ((.cse2 (let ((.cse6 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_arrayElimArr_13))) (store .cse6 |c_ULTIMATE.start_sll_create_~head~0#1.base| (store (select .cse6 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_153| v_ArrVal_2288)))) (.cse0 (+ 4 |ULTIMATE.start_sll_create_~new_head~0#1.offset|))) (let ((.cse3 (select (select .cse2 |c_ULTIMATE.start_node_create_~temp~0#1.base|) .cse0)) (.cse1 (select v_arrayElimArr_12 .cse0))) (or (not (= (select v_arrayElimArr_13 .cse0) |c_ULTIMATE.start_sll_create_~head~0#1.base|)) (< .cse1 |v_ULTIMATE.start_sll_update_at_~head#1.offset_153|) (and (= (select (select .cse2 .cse3) 4) 0) (forall ((v_ArrVal_2287 Int)) (= (select (select (let ((.cse4 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_arrayElimArr_12))) (store .cse4 |c_ULTIMATE.start_sll_create_~head~0#1.base| (store (select .cse4 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_153| v_ArrVal_2287))) (select (select (let ((.cse5 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_arrayElimArr_13))) (store .cse5 |c_ULTIMATE.start_sll_create_~head~0#1.base| (store (select .cse5 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_153| v_ArrVal_2288))) |c_ULTIMATE.start_node_create_~temp~0#1.base|) (+ 4 |ULTIMATE.start_sll_create_~new_head~0#1.offset|))) 4) 0))) (= |c_ULTIMATE.start_node_create_~temp~0#1.base| .cse3) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| .cse1))))) (= |c_ULTIMATE.start_node_create_~temp~0#1.offset| 0) (= |c_ULTIMATE.start_sll_create_~head~0#1.offset| 0) (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4) 0) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4) 0)) is different from false [2021-11-25 18:16:10,829 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_sll_create_~new_head~0#1.offset| Int) (v_ArrVal_2284 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_153| Int) (v_ArrVal_2288 Int)) (let ((.cse5 (+ 4 |ULTIMATE.start_sll_create_~new_head~0#1.offset|))) (let ((.cse0 (let ((.cse6 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) .cse5 |c_ULTIMATE.start_sll_create_~head~0#1.base|)))) (store .cse6 |c_ULTIMATE.start_sll_create_~head~0#1.base| (store (select .cse6 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_153| v_ArrVal_2288))))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) .cse5))) (or (and (= (select (select .cse0 .cse1) 4) 0) (forall ((v_ArrVal_2287 Int)) (= (select (let ((.cse3 (+ 4 |ULTIMATE.start_sll_create_~new_head~0#1.offset|))) (select (let ((.cse2 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) .cse3 v_ArrVal_2284)))) (store .cse2 |c_ULTIMATE.start_sll_create_~head~0#1.base| (store (select .cse2 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_153| v_ArrVal_2287))) (select (select (let ((.cse4 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) .cse3 |c_ULTIMATE.start_sll_create_~head~0#1.base|)))) (store .cse4 |c_ULTIMATE.start_sll_create_~head~0#1.base| (store (select .cse4 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_153| v_ArrVal_2288))) |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) .cse3))) 4) 0))) (< v_ArrVal_2284 |v_ULTIMATE.start_sll_update_at_~head#1.offset_153|) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| v_ArrVal_2284) (= .cse1 |c_ULTIMATE.start_sll_create_~new_head~0#1.base|)))))) (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4) 0) (not (= |c_ULTIMATE.start_sll_create_~head~0#1.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|)) (= |c_ULTIMATE.start_sll_create_~head~0#1.offset| |c_ULTIMATE.start_sll_create_~new_head~0#1.offset|) (= |c_ULTIMATE.start_sll_create_~new_head~0#1.offset| 0) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4) 0)) is different from false [2021-11-25 18:16:12,833 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4))) (and (= |c_ULTIMATE.start_sll_create_~head~0#1.offset| 0) (= (select (select |c_#memory_$Pointer$.base| .cse0) 4) 0) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_153| Int) (v_ArrVal_2288 Int)) (let ((.cse5 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4))) (let ((.cse1 (let ((.cse6 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse5))) (store |c_#memory_$Pointer$.base| .cse6 (store (select |c_#memory_$Pointer$.base| .cse6) |v_ULTIMATE.start_sll_update_at_~head#1.offset_153| v_ArrVal_2288))))) (let ((.cse2 (select (select .cse1 |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse5))) (or (and (= (select (select .cse1 .cse2) 4) 0) (forall ((v_ArrVal_2287 Int)) (= 0 (select (let ((.cse4 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4))) (let ((.cse3 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse4))) (select (store |c_#memory_$Pointer$.offset| .cse3 (store (select |c_#memory_$Pointer$.offset| .cse3) |v_ULTIMATE.start_sll_update_at_~head#1.offset_153| v_ArrVal_2287)) (select (select (store |c_#memory_$Pointer$.base| .cse3 (store (select |c_#memory_$Pointer$.base| .cse3) |v_ULTIMATE.start_sll_update_at_~head#1.offset_153| v_ArrVal_2288)) |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse4)))) 4)))) (= .cse2 |c_ULTIMATE.start_sll_create_~head~0#1.base|) (< (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse5) |v_ULTIMATE.start_sll_update_at_~head#1.offset_153|)))))) (= (select (select |c_#memory_$Pointer$.offset| .cse0) 4) 0) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4) 0) (not (= .cse0 |c_ULTIMATE.start_sll_create_~head~0#1.base|)))) is different from false [2021-11-25 18:16:14,836 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) 4))) (and (not (= |c_ULTIMATE.start_main_~s~0#1.base| .cse0)) (= (select (select |c_#memory_$Pointer$.offset| .cse0) 4) 0) (= (select (select |c_#memory_$Pointer$.base| .cse0) 4) 0) (= |c_ULTIMATE.start_main_~s~0#1.offset| (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) 4)) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_153| Int) (v_ArrVal_2288 Int)) (let ((.cse2 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (let ((.cse3 (let ((.cse6 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) .cse2))) (store |c_#memory_$Pointer$.base| .cse6 (store (select |c_#memory_$Pointer$.base| .cse6) |v_ULTIMATE.start_sll_update_at_~head#1.offset_153| v_ArrVal_2288))))) (let ((.cse1 (select (select .cse3 |c_ULTIMATE.start_main_~s~0#1.base|) .cse2))) (or (= .cse1 |c_ULTIMATE.start_main_~s~0#1.base|) (< (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) .cse2) |v_ULTIMATE.start_sll_update_at_~head#1.offset_153|) (and (= 0 (select (select .cse3 .cse1) 4)) (forall ((v_ArrVal_2287 Int)) (= (select (let ((.cse5 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (let ((.cse4 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) .cse5))) (select (store |c_#memory_$Pointer$.offset| .cse4 (store (select |c_#memory_$Pointer$.offset| .cse4) |v_ULTIMATE.start_sll_update_at_~head#1.offset_153| v_ArrVal_2287)) (select (select (store |c_#memory_$Pointer$.base| .cse4 (store (select |c_#memory_$Pointer$.base| .cse4) |v_ULTIMATE.start_sll_update_at_~head#1.offset_153| v_ArrVal_2288)) |c_ULTIMATE.start_main_~s~0#1.base|) .cse5)))) 4) 0)))))))) (= |c_ULTIMATE.start_main_~s~0#1.offset| 0))) is different from false [2021-11-25 18:16:16,840 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse3 (+ 4 |c_ULTIMATE.start_sll_update_at_~head#1.offset|)) (.cse1 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|)) (.cse4 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (let ((.cse2 (select .cse1 .cse4)) (.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) .cse3))) (and (= .cse0 (select .cse1 4)) (= (select (select |c_#memory_$Pointer$.offset| .cse2) 4) 0) (= (select (select |c_#memory_$Pointer$.base| .cse2) 4) 0) (= (select (select |c_#memory_$Pointer$.offset| .cse0) 4) 0) (not (= .cse2 |c_ULTIMATE.start_main_~s~0#1.base|)) (not (= .cse0 |c_ULTIMATE.start_main_~s~0#1.base|)) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base|) .cse3) 0) (= |c_ULTIMATE.start_sll_update_at_~head#1.offset| 0) (= |c_ULTIMATE.start_main_~s~0#1.offset| |c_ULTIMATE.start_sll_update_at_~head#1.offset|) (= |c_ULTIMATE.start_sll_update_at_~head#1.base| |c_ULTIMATE.start_main_~s~0#1.base|) (<= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) .cse4) 0) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_153| Int) (v_ArrVal_2288 Int)) (let ((.cse5 (+ 4 |c_ULTIMATE.start_sll_update_at_~head#1.offset|))) (let ((.cse6 (let ((.cse9 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) .cse5))) (store |c_#memory_$Pointer$.base| .cse9 (store (select |c_#memory_$Pointer$.base| .cse9) |v_ULTIMATE.start_sll_update_at_~head#1.offset_153| v_ArrVal_2288))))) (let ((.cse7 (select (select .cse6 |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)))) (or (< (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base|) .cse5) |v_ULTIMATE.start_sll_update_at_~head#1.offset_153|) (and (= (select (select .cse6 .cse7) 4) 0) (forall ((v_ArrVal_2287 Int)) (= (select (let ((.cse8 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) (+ 4 |c_ULTIMATE.start_sll_update_at_~head#1.offset|)))) (select (store |c_#memory_$Pointer$.offset| .cse8 (store (select |c_#memory_$Pointer$.offset| .cse8) |v_ULTIMATE.start_sll_update_at_~head#1.offset_153| v_ArrVal_2287)) (select (select (store |c_#memory_$Pointer$.base| .cse8 (store (select |c_#memory_$Pointer$.base| .cse8) |v_ULTIMATE.start_sll_update_at_~head#1.offset_153| v_ArrVal_2288)) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)))) 4) 0))) (= |c_ULTIMATE.start_main_~s~0#1.base| .cse7)))))) (= (select (select |c_#memory_$Pointer$.base| .cse0) 4) 0) (= |c_ULTIMATE.start_main_~s~0#1.offset| 0)))) is different from false [2021-11-25 18:16:17,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:16:17,671 INFO L93 Difference]: Finished difference Result 88 states and 93 transitions. [2021-11-25 18:16:17,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-25 18:16:17,672 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.125) internal successors, (102), 47 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-25 18:16:17,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:16:17,673 INFO L225 Difference]: With dead ends: 88 [2021-11-25 18:16:17,673 INFO L226 Difference]: Without dead ends: 57 [2021-11-25 18:16:17,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 90 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 11 IntricatePredicates, 0 DeprecatedPredicates, 1271 ImplicationChecksByTransitivity, 102.4s TimeCoverageRelationStatistics Valid=328, Invalid=4117, Unknown=21, NotChecked=1540, Total=6006 [2021-11-25 18:16:17,674 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 79 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 368 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:16:17,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 267 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 475 Invalid, 0 Unknown, 368 Unchecked, 0.4s Time] [2021-11-25 18:16:17,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-25 18:16:17,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-11-25 18:16:17,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 56 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:16:17,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2021-11-25 18:16:17,676 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 44 [2021-11-25 18:16:17,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:16:17,676 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2021-11-25 18:16:17,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.125) internal successors, (102), 47 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:16:17,676 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2021-11-25 18:16:17,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-25 18:16:17,677 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:16:17,677 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:16:17,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-25 18:16:17,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-25 18:16:17,878 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 18:16:17,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:16:17,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1728268671, now seen corresponding path program 3 times [2021-11-25 18:16:17,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:16:17,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131331802] [2021-11-25 18:16:17,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:16:17,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:16:17,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:16:17,944 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-25 18:16:17,944 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:16:17,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131331802] [2021-11-25 18:16:17,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131331802] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:16:17,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132774325] [2021-11-25 18:16:17,945 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:16:17,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:16:17,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:16:17,963 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:16:17,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-25 18:16:18,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:16:18,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:16:18,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 106 conjunts are in the unsatisfiable core [2021-11-25 18:16:18,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:16:18,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:16:18,408 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:16:18,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-25 18:16:18,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2021-11-25 18:16:18,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2021-11-25 18:16:18,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-11-25 18:16:18,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:16:18,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:18,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-25 18:16:18,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:18,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:18,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:18,726 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-11-25 18:16:18,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 45 [2021-11-25 18:16:18,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:18,830 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:16:18,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 33 [2021-11-25 18:16:19,159 INFO L354 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2021-11-25 18:16:19,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 23 [2021-11-25 18:16:19,279 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 18:16:19,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:16:28,729 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2454 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_162| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_162|) (not (= (select (let ((.cse0 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_162| v_ArrVal_2454))) (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base| .cse0) (select .cse0 4))) 4) 0)))) is different from false [2021-11-25 18:16:30,746 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2452 Int) (v_ArrVal_2454 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_162| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_162|) (not (= 0 (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) |c_ULTIMATE.start_sll_update_at_~head#1.offset| v_ArrVal_2452)))) (let ((.cse1 (store (select .cse0 |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_162| v_ArrVal_2454))) (select (store .cse0 |c_ULTIMATE.start_main_~s~0#1.base| .cse1) (select .cse1 4)))) 4))))) is different from false [2021-11-25 18:16:32,800 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2452 Int) (v_ArrVal_2454 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_163| Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_162| Int)) (let ((.cse3 (+ 4 |c_ULTIMATE.start_sll_update_at_~head#1.offset|))) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_162|) (not (= (select (let ((.cse0 (let ((.cse2 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) .cse3))) (store |c_#memory_$Pointer$.base| .cse2 (store (select |c_#memory_$Pointer$.base| .cse2) |v_ULTIMATE.start_sll_update_at_~head#1.offset_163| v_ArrVal_2452))))) (let ((.cse1 (store (select .cse0 |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_162| v_ArrVal_2454))) (select (store .cse0 |c_ULTIMATE.start_main_~s~0#1.base| .cse1) (select .cse1 4)))) 4) 0)) (< (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base|) .cse3) |v_ULTIMATE.start_sll_update_at_~head#1.offset_163|)))) is different from false [2021-11-25 18:16:34,885 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2452 Int) (v_ArrVal_2454 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_163| Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_162| Int)) (let ((.cse3 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (or (not (= (select (let ((.cse0 (let ((.cse2 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) .cse3))) (store |c_#memory_$Pointer$.base| .cse2 (store (select |c_#memory_$Pointer$.base| .cse2) |v_ULTIMATE.start_sll_update_at_~head#1.offset_163| v_ArrVal_2452))))) (let ((.cse1 (store (select .cse0 |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_162| v_ArrVal_2454))) (select (store .cse0 |c_ULTIMATE.start_main_~s~0#1.base| .cse1) (select .cse1 4)))) 4) 0)) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_162|) (< (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) .cse3) |v_ULTIMATE.start_sll_update_at_~head#1.offset_163|)))) is different from false [2021-11-25 18:16:36,930 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2452 Int) (v_ArrVal_2454 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_163| Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_162| Int)) (let ((.cse0 (+ |c_ULTIMATE.start_sll_create_~head~0#1.offset| 4))) (or (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_162|) (< (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse0) |v_ULTIMATE.start_sll_update_at_~head#1.offset_163|) (not (= (select (let ((.cse1 (let ((.cse3 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse0))) (store |c_#memory_$Pointer$.base| .cse3 (store (select |c_#memory_$Pointer$.base| .cse3) |v_ULTIMATE.start_sll_update_at_~head#1.offset_163| v_ArrVal_2452))))) (let ((.cse2 (store (select .cse1 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_162| v_ArrVal_2454))) (select (store .cse1 |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse2) (select .cse2 4)))) 4) 0))))) is different from false [2021-11-25 18:16:38,984 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2452 Int) (v_ArrVal_2454 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_163| Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_162| Int)) (or (not (= 0 (select (let ((.cse0 (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) (+ 4 |c_ULTIMATE.start_sll_create_~new_head~0#1.offset|) |c_ULTIMATE.start_sll_create_~head~0#1.base|)))) (store .cse2 |c_ULTIMATE.start_sll_create_~head~0#1.base| (store (select .cse2 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_163| v_ArrVal_2452))))) (let ((.cse1 (store (select .cse0 |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_162| v_ArrVal_2454))) (select (store .cse0 |c_ULTIMATE.start_sll_create_~new_head~0#1.base| .cse1) (select .cse1 4)))) 4))) (< |c_ULTIMATE.start_sll_create_~new_head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_162|) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_163|))) is different from false [2021-11-25 18:16:39,012 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:16:39,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 74 [2021-11-25 18:16:39,082 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2452 Int) (v_ArrVal_2454 Int) (v_arrayElimArr_16 (Array Int Int)) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_163| Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_162| Int)) (or (< |c_ULTIMATE.start_node_create_~temp~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_162|) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_163|) (not (= (select (let ((.cse0 (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_arrayElimArr_16))) (store .cse2 |c_ULTIMATE.start_sll_create_~head~0#1.base| (store (select .cse2 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_163| v_ArrVal_2452))))) (let ((.cse1 (store (select .cse0 |c_ULTIMATE.start_node_create_~temp~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_162| v_ArrVal_2454))) (select (store .cse0 |c_ULTIMATE.start_node_create_~temp~0#1.base| .cse1) (select .cse1 4)))) 4) 0)) (not (= (select v_arrayElimArr_16 (+ |c_ULTIMATE.start_node_create_~temp~0#1.offset| 4)) |c_ULTIMATE.start_sll_create_~head~0#1.base|)))) is different from false [2021-11-25 18:16:39,292 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2452 Int) (v_ArrVal_2454 Int) (v_arrayElimArr_16 (Array Int Int)) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_163| Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_162| Int) (|v_ULTIMATE.start_node_create_~temp~0#1.base_80| Int)) (or (< 0 |v_ULTIMATE.start_sll_update_at_~head#1.offset_162|) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_163|) (not (= (select v_arrayElimArr_16 4) |c_ULTIMATE.start_sll_create_~head~0#1.base|)) (not (= (select |c_#valid| |v_ULTIMATE.start_node_create_~temp~0#1.base_80|) 0)) (not (= (select (let ((.cse0 (let ((.cse2 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_node_create_~temp~0#1.base_80| v_arrayElimArr_16))) (store .cse2 |c_ULTIMATE.start_sll_create_~head~0#1.base| (store (select .cse2 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_163| v_ArrVal_2452))))) (let ((.cse1 (store (select .cse0 |v_ULTIMATE.start_node_create_~temp~0#1.base_80|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_162| v_ArrVal_2454))) (select (store .cse0 |v_ULTIMATE.start_node_create_~temp~0#1.base_80| .cse1) (select .cse1 4)))) 4) 0)))) is different from false [2021-11-25 18:16:39,318 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:16:39,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 76 [2021-11-25 18:16:39,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:39,331 INFO L354 Elim1Store]: treesize reduction 9, result has 30.8 percent of original size [2021-11-25 18:16:39,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 939 treesize of output 897 [2021-11-25 18:16:39,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:39,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 657 treesize of output 491 [2021-11-25 18:16:39,363 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:16:39,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 175 treesize of output 173 [2021-11-25 18:16:39,378 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 18:16:39,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2021-11-25 18:16:39,455 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 18 not checked. [2021-11-25 18:16:39,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132774325] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:16:39,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1937924653] [2021-11-25 18:16:39,457 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2021-11-25 18:16:39,457 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:16:39,457 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:16:39,457 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:16:39,458 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:16:39,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:39,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:39,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 18:16:39,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:39,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:16:39,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:16:39,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:16:39,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:39,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 18:16:39,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:39,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 18:16:39,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:39,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:39,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 18:16:39,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:39,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:39,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:39,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-25 18:16:39,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:39,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:16:39,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:39,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 18:16:39,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:39,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:39,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:39,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:39,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:39,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2021-11-25 18:16:39,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:39,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:39,793 INFO L354 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2021-11-25 18:16:39,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 290 treesize of output 282 [2021-11-25 18:16:39,840 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:16:39,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 280 treesize of output 287 [2021-11-25 18:16:39,905 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:16:39,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 274 treesize of output 281 [2021-11-25 18:16:40,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:40,261 INFO L354 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2021-11-25 18:16:40,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 559 treesize of output 544 [2021-11-25 18:16:40,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:40,320 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:16:40,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 564 treesize of output 565 [2021-11-25 18:16:40,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:40,375 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:16:40,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 558 treesize of output 559 [2021-11-25 18:16:40,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:40,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:40,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:40,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:40,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:40,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:40,981 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 18:16:40,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 432 treesize of output 409 [2021-11-25 18:16:40,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:40,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:41,016 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-25 18:16:41,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 428 treesize of output 421 [2021-11-25 18:16:41,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:41,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:41,051 INFO L354 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2021-11-25 18:16:41,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 506 treesize of output 499 [2021-11-25 18:16:41,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:41,220 INFO L354 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2021-11-25 18:16:41,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 414 treesize of output 417 [2021-11-25 18:16:41,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:41,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:41,450 INFO L354 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2021-11-25 18:16:41,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 290 treesize of output 282 [2021-11-25 18:16:41,523 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:16:41,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 280 treesize of output 287 [2021-11-25 18:16:41,590 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 18:16:41,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 274 treesize of output 281 [2021-11-25 18:16:41,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:41,977 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:16:41,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 583 treesize of output 578 [2021-11-25 18:16:41,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:42,036 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 18:16:42,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 571 treesize of output 566 [2021-11-25 18:16:42,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:42,110 INFO L354 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2021-11-25 18:16:42,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 535 [2021-11-25 18:16:42,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:42,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:42,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:16:42,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:42,515 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 18:16:42,515 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 424 treesize of output 401 [2021-11-25 18:16:42,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:42,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:42,549 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 18:16:42,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 420 treesize of output 413 [2021-11-25 18:16:42,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:42,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:16:42,583 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 18:16:42,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 438 treesize of output 431 [2021-11-25 18:16:42,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:16:42,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:16:42,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:16:42,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:16:42,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:16:42,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 18:16:43,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:16:43,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2021-11-25 18:16:44,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2021-11-25 18:16:44,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:16:44,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 18:16:44,185 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:16:48,727 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8425#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_destroy_#in~head#1.offset| 0) (<= |ULTIMATE.start_main_~i~0#1| 0) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= 0 |ULTIMATE.start_sll_destroy_#in~head#1.offset|) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_sll_destroy_~head#1.base| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |ULTIMATE.start_sll_destroy_~head#1.offset| 0) (= |ULTIMATE.start_main_#res#1| 0) (= |#NULL.base| 0))' at error location [2021-11-25 18:16:48,728 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:16:48,728 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:16:48,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 24, 24] total 41 [2021-11-25 18:16:48,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454103179] [2021-11-25 18:16:48,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:16:48,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-25 18:16:48,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:16:48,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-25 18:16:48,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=2351, Unknown=10, NotChecked=840, Total=3422 [2021-11-25 18:16:48,730 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand has 41 states, 41 states have (on average 2.731707317073171) internal successors, (112), 41 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:16:49,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:16:49,104 INFO L93 Difference]: Finished difference Result 12 states and 11 transitions. [2021-11-25 18:16:49,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 18:16:49,104 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.731707317073171) internal successors, (112), 41 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-25 18:16:49,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:16:49,104 INFO L225 Difference]: With dead ends: 12 [2021-11-25 18:16:49,104 INFO L226 Difference]: Without dead ends: 0 [2021-11-25 18:16:49,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 24.7s TimeCoverageRelationStatistics Valid=268, Invalid=2946, Unknown=10, NotChecked=936, Total=4160 [2021-11-25 18:16:49,106 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 5 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:16:49,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 0 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 189 Invalid, 0 Unknown, 120 Unchecked, 0.2s Time] [2021-11-25 18:16:49,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-25 18:16:49,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-25 18:16:49,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:16:49,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-25 18:16:49,107 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 49 [2021-11-25 18:16:49,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:16:49,108 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-25 18:16:49,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.731707317073171) internal successors, (112), 41 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:16:49,108 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-25 18:16:49,109 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-25 18:16:49,111 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATION (20 of 21 remaining) [2021-11-25 18:16:49,112 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATION (19 of 21 remaining) [2021-11-25 18:16:49,112 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATION (18 of 21 remaining) [2021-11-25 18:16:49,112 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATION (17 of 21 remaining) [2021-11-25 18:16:49,112 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATION (16 of 21 remaining) [2021-11-25 18:16:49,113 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATION (15 of 21 remaining) [2021-11-25 18:16:49,113 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATION (14 of 21 remaining) [2021-11-25 18:16:49,113 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATION (13 of 21 remaining) [2021-11-25 18:16:49,113 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATION (12 of 21 remaining) [2021-11-25 18:16:49,113 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATION (11 of 21 remaining) [2021-11-25 18:16:49,114 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATION (10 of 21 remaining) [2021-11-25 18:16:49,114 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATION (9 of 21 remaining) [2021-11-25 18:16:49,114 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12REQUIRES_VIOLATION (8 of 21 remaining) [2021-11-25 18:16:49,114 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13REQUIRES_VIOLATION (7 of 21 remaining) [2021-11-25 18:16:49,115 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14REQUIRES_VIOLATION (6 of 21 remaining) [2021-11-25 18:16:49,115 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15REQUIRES_VIOLATION (5 of 21 remaining) [2021-11-25 18:16:49,115 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE (4 of 21 remaining) [2021-11-25 18:16:49,115 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE (3 of 21 remaining) [2021-11-25 18:16:49,116 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE (2 of 21 remaining) [2021-11-25 18:16:49,116 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK (1 of 21 remaining) [2021-11-25 18:16:49,116 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK (0 of 21 remaining) [2021-11-25 18:16:49,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-25 18:16:49,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:16:49,345 INFO L732 BasicCegarLoop]: Path program histogram: [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:16:49,346 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-25 18:16:49,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 06:16:49 BoogieIcfgContainer [2021-11-25 18:16:49,350 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-25 18:16:49,351 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-25 18:16:49,351 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-25 18:16:49,351 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-25 18:16:49,351 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:08:11" (3/4) ... [2021-11-25 18:16:49,354 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-25 18:16:49,366 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 31 nodes and edges [2021-11-25 18:16:49,366 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2021-11-25 18:16:49,367 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-11-25 18:16:49,367 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-25 18:16:49,411 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/witness.graphml [2021-11-25 18:16:49,412 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-25 18:16:49,412 INFO L158 Benchmark]: Toolchain (without parser) took 519922.52ms. Allocated memory was 100.7MB in the beginning and 488.6MB in the end (delta: 388.0MB). Free memory was 61.4MB in the beginning and 296.8MB in the end (delta: -235.3MB). Peak memory consumption was 154.4MB. Max. memory is 16.1GB. [2021-11-25 18:16:49,413 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 100.7MB. Free memory is still 78.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 18:16:49,413 INFO L158 Benchmark]: CACSL2BoogieTranslator took 634.09ms. Allocated memory is still 100.7MB. Free memory was 61.3MB in the beginning and 72.5MB in the end (delta: -11.2MB). Peak memory consumption was 13.2MB. Max. memory is 16.1GB. [2021-11-25 18:16:49,413 INFO L158 Benchmark]: Boogie Procedure Inliner took 81.54ms. Allocated memory is still 100.7MB. Free memory was 72.5MB in the beginning and 70.4MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 18:16:49,413 INFO L158 Benchmark]: Boogie Preprocessor took 40.03ms. Allocated memory is still 100.7MB. Free memory was 70.4MB in the beginning and 68.9MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 18:16:49,414 INFO L158 Benchmark]: RCFGBuilder took 751.20ms. Allocated memory is still 100.7MB. Free memory was 68.9MB in the beginning and 51.1MB in the end (delta: 17.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-11-25 18:16:49,414 INFO L158 Benchmark]: TraceAbstraction took 518346.02ms. Allocated memory was 100.7MB in the beginning and 488.6MB in the end (delta: 388.0MB). Free memory was 50.6MB in the beginning and 300.4MB in the end (delta: -249.8MB). Peak memory consumption was 137.1MB. Max. memory is 16.1GB. [2021-11-25 18:16:49,414 INFO L158 Benchmark]: Witness Printer took 61.37ms. Allocated memory is still 488.6MB. Free memory was 300.4MB in the beginning and 296.8MB in the end (delta: 3.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-25 18:16:49,415 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 100.7MB. Free memory is still 78.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 634.09ms. Allocated memory is still 100.7MB. Free memory was 61.3MB in the beginning and 72.5MB in the end (delta: -11.2MB). Peak memory consumption was 13.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 81.54ms. Allocated memory is still 100.7MB. Free memory was 72.5MB in the beginning and 70.4MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 40.03ms. Allocated memory is still 100.7MB. Free memory was 70.4MB in the beginning and 68.9MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 751.20ms. Allocated memory is still 100.7MB. Free memory was 68.9MB in the beginning and 51.1MB in the end (delta: 17.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 518346.02ms. Allocated memory was 100.7MB in the beginning and 488.6MB in the end (delta: 388.0MB). Free memory was 50.6MB in the beginning and 300.4MB in the end (delta: -249.8MB). Peak memory consumption was 137.1MB. Max. memory is 16.1GB. * Witness Printer took 61.37ms. Allocated memory is still 488.6MB. Free memory was 300.4MB in the beginning and 296.8MB in the end (delta: 3.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 579]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 579]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 580]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 580]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 587]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 587]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 608]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 608]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 611]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 611]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 601]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 601]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 604]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 604]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 594]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 594]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 595]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 595]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 595]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 630]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 613]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 45 locations, 21 error locations. Started 1 CEGAR loops. OverallTime: 518.3s, OverallIterations: 34, TraceHistogramMax: 3, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 208.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5172 SdHoareTripleChecker+Valid, 6.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5172 mSDsluCounter, 3134 SdHoareTripleChecker+Invalid, 5.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 3290 IncrementalHoareTripleChecker+Unchecked, 4018 mSDsCounter, 574 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7622 IncrementalHoareTripleChecker+Invalid, 11486 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 574 mSolverCounterUnsat, 607 mSDtfsCounter, 7622 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2210 GetRequests, 1131 SyntacticMatches, 39 SemanticMatches, 1040 ConstructedPredicates, 71 IntricatePredicates, 2 DeprecatedPredicates, 13365 ImplicationChecksByTransitivity, 409.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=88occurred in iteration=32, InterpolantAutomatonStates: 379, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 34 MinimizatonAttempts, 546 StatesRemovedByMinimization, 26 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 165.5s InterpolantComputationTime, 1392 NumberOfCodeBlocks, 1377 NumberOfCodeBlocksAsserted, 57 NumberOfCheckSat, 1880 ConstructedInterpolants, 183 QuantifiedInterpolants, 28954 SizeOfPredicates, 430 NumberOfNonLiveVariables, 6066 ConjunctsInSsa, 1024 ConjunctsInUnsatCore, 70 InterpolantComputations, 16 PerfectInterpolantSequences, 621/1168 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 4.0s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 11, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 42, TOOLS_POST_TIME: 3.8s, 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: 42, TOOLS_QUANTIFIERELIM_TIME: 3.8s, TOOLS_QUANTIFIERELIM_MAX_TIME: 1.1s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 80, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 3, DOMAIN_JOIN_TIME: 0.1s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 5, DOMAIN_WIDEN_TIME: 0.1s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 10, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 11, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 5, LOOP_SUMMARIZER_CACHE_MISSES: 5, LOOP_SUMMARIZER_OVERALL_TIME: 2.8s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 2.8s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 10, 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: 186, DAG_COMPRESSION_RETAINED_NODES: 50, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 21 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-11-25 18:16:49,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093dc819-1924-4ee4-8a04-ea18d33a379d/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE